Option 300 Base Station BERT

User’s and Programming Guide
Agilent Technologies
ESG Family Signal Generators
Option 300 Base Station BERT
Serial Number Prefixes:
(Affix Label Here)
Part No. E4400-90305
Printed in USA
April 2002
Supersedes: June 2001
© Copyright 1999–2002 Agilent Technologies, Inc.
ii
Contents
1. Getting Started
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
GSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
EDGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Baseband BER Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
2. Making Measurements
Measuring RF Loopback BER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Connecting the Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Configuring GSM Mode on the Agilent Technologies
E4406A VSA Series Transmitter Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Configuring GSM Mode on the ESG-D Series Signal Generator . . . . . . . . . . . . . . . . . . . . .2-4
Synchronizing to the BCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Synchronizing to the TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Making Loopback BER Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Using Amplitude Sensitivity Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
Using the External Frame Trigger Function with the EDGE Format . . . . . . . . . . . . . . . . .2-13
Measuring the Initial Delay Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13
Adjusting the Delay Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14
3. Softkey Reference
GSM/EDGE Base Station Test Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Adjust Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Arm Sensitivity Search. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Baseband BERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
BER% Uncoded Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
BER Mode Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
BERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
BERT Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
BERT Resync Off On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
BERT Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
BERT Trigger Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Bit Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Bit Delay Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
BLER% MCS5 Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
BLER% MCS9 Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
BLER% Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Block Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Block Erasure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
BTS BERT EDGE Loopback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
BTS BERT GSM Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Channel Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Channel Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Class Ib Bit Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Class Ib RBER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Class II Bit Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Class II RBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
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Contents
Clock Gate Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Clock Gate Polarity Neg Pos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Clock Polarity Neg Pos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Configure BER% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Configure BERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Configure Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Configure Sensitivity Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Configure Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Cycle Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Cycle End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Data Polarity Neg Pos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Delayed Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Display BER % Exp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Display Update Cycle End Cont . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Downlink MCS-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Downlink MCS-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Downlink MCS-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
EDGE BERT Off On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Error Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Error Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
E-TCH/F43.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Exceeds Any Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Exceeds Any Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Ext . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Ext Frame Trigger Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Ext Frame Trigger Polarity Neg Pos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Fail Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Frame Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Frame Erasure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Frame Erasure Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Frame Repeat Single Cont. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Frame Trigger Source BCH PDCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Frame Trigger Source Int Ext . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Freq Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Freq Channels Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
GSM 450 Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
GSM 450 Mobile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
GSM 450/850 Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
GSM 450/850 Mobile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
GSM 480 Mobile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
GSM 850 Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
GSM 850 Mobile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
GSM BERT Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
High Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Immediate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Impedance 75 Ohm TTL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Initial Bit Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Initial Block Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
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Contents
Low Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Max. Data Rate 2Mbps 10Mbps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Measurement Mode BER% Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Measurement Mode BLER% Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Multiframe Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24
No Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24
No Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24
Pass Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25
PN9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25
PN15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-25
Pass Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26
Pass/Fail Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26
Pass/Fail Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26
Pass/Fail Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27
Restore EDGE Factory Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27
Restore GSM Factory Default. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27
Resync Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27
Search DL MCS5 Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Search DL MCS9 Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Search Uncoded Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Sensitivity Search Configure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Special Pattern 0’s 1’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Special Pattern Ignore Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29
Spectrum Invert Off On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29
Stop Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29
Stop Sensitivity Search. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29
Sync Source BCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30
Synchronize to BCH/TCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30
Synchronize to BCH/PDCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30
Target% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30
Target BER % . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31
Target BLER % . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31
TCH/FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31
Threshold # of Events to Stop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31
Total Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32
Timeslot # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32
Transmit Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32
Trigger Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32
Uncoded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33
Uplink MCS-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33
Uplink MCS-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33
Uplink MCS-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33
Uplink Timing Advance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-34
Display Annotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-35
1. Setting Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-35
2. Measurement Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-37
3. Other Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-37
Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-38
1. BER DATA IN Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-38
v
Contents
2. BER CLK IN Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
3. BER GATE IN Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
4. BER MEAS END Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
5. BER TEST OUT Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
6. BER ERR OUT Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
7. BER NO DATA Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
8. BER SYNC LOSS Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
4. Remote Programming
Option 300 SCPI Command Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
BER Clock Gate Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
BER Clock Gate State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
BER Clock Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
BER Cycle Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
BER Data Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
BER Data Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
BER Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
BER Display Update Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
BER Input Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
BER Maximum Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
BER Measurement Result Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
BER Pass/Fail Judgement Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
BER Pass/Fail Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
BER Pass/Fail State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
BER Resync Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
BER Resynchronization State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
BER Special Pattern Ignore Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
BER Special Pattern Ignore State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
BER Total Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
BER Trigger Bit Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
BER Trigger Bit Delay State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
BER Trigger Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
BERT State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
BERT Trigger Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Bit Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
BLER Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Block Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Class Ib Bits, Number to be Measured . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Class II Bits, Number to be Measured . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
External Frame Trigger Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
External Frame Trigger Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Frame Count (BER %) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Frame Trigger Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Frame Synchronization Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Loopback Operating State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Measurement Mode, Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Measurement Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Measurement, Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
vi
Contents
Pass/Fail Limit, Class Ib RBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Pass/Fail Limit, Class II RBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Pass/Fail Limit, Error Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Pass/Fail Limit, Frame Erasure Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Pass/Fail Limit, Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Sensitivity Search, Bit Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
Sensitivity Search, Block Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
Sensitivity Search, Frame Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
Sensitivity Search, Initial Bit Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
Sensitivity Search, Initial Block Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
Sensitivity Search, Initial Frame Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
Sensitivity Search, Target Error Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
Sensitivity Search, High Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
Sensitivity Search, Low Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
Sensitivity Search, Pass Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21
Spectrum Invert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21
Status Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22
Stop Measurement Threshold Criteria, Class Ib Bit Error . . . . . . . . . . . . . . . . . . . . . . . .4-25
Stop Measurement Threshold Criteria, Class II Bit Error. . . . . . . . . . . . . . . . . . . . . . . . .4-25
Stop Measurement Threshold Criteria, Frame Erasure. . . . . . . . . . . . . . . . . . . . . . . . . . .4-25
Stop Measurement Threshold Criteria, Number of Events . . . . . . . . . . . . . . . . . . . . . . . .4-25
Sync Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-27
Sync Signal Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-27
Synchronizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-27
Timeslot Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-28
Uplink Timing Advance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-29
5. Softkey/Command Cross-Reference
6. Theory of Operation
Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Erased Frame Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Downlink Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Frame Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
GSM Frame Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
GSM Received Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
GSM Transmit Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Edge Frame Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
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Contents
viii
ESG Family Signal Generators
Option 300 Preliminary Document
1
Getting Started
This chapter provides a product overview for the Agilent Technologies ESG-D Option 300,
Base Station BERT.
Base Station BERT User’s and Programming Guide
1-1
Getting Started
Product Overview
ESG Family Signal Generators
Option 300 Preliminary Document
Product Overview
The ESG-D Option 300, Base Station BERT (includes BER Tester) offers real-time
generation of fully coded enhanced general packet radio service (EGPRS) and
E-TCH/F43.2 signals, adds RF loopback bit error rate testing (BERT) and block error rate
(BLER) measurements to the ESG/VSA combination. It provides loopback bit error rate
(BER) measurements for the GSM standard, including residual bit error rate (RBER) for
both Class Ib and Class II bits and frame erasure ratio (FER). It provides high speed
sensitivity search routines for high throughput in production, and tests both transceiver
modules and base transceiver stations.
Option 300 synchronizes the ESG receiver to the broadcast channel (BCH) or to a traffic
channel (TCH) from the base transceiver station (BTS). A 13 MHz reference clock input on
the vector spectrum analyzer (VSA) allows the VSA and ESG time bases to be locked to the
BTS.
The inclusion of the baseband BER tester provides generic analysis capabilities for
demodulated data sequences.
The ESG-D Option 300 can report the following results:
GSM
• Class Ib RBER and total class Ib bits tested
• Class II RBER and total class II bits tested
• FER and total frames tested
• sensitivity search results
EDGE
• demodulation and decoding verification of receivers with fully coded MCS-5 and MCS-9
signals
• payload bit error rate and total burst count for uncoded BER
• erased data block count/rate of coded channels
• sensitivity search results
Baseband BER Tester
•
pass/fail status for user-defined maximum BER limits
• lost or invalid data and /or clock signals
• updated BER test results
1-2
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
2
Making Measurements
This chapter contains examples of GSM base station receiver sensitivity measurements
using the loopback technique.
Base Station BERT User’s and Programming Guide
2-1
Making Measurements
Measuring RF Loopback BER
ESG Family Signal Generators
Option 300 Preliminary Document
Measuring RF Loopback BER
The following procedure uses the data looped back from the base transceiver station (BTS)
to measure the bit error ratio introduced by the BTS receiver when it is receiving coded
data from the test equipment. Timing synchronization must first be achieved between the
BTS and the test equipment so that data can be transmitted and received at the expected
times. Synchronization is achievable either to a received broadcast channel (BCH), to a
received full rate speech traffic channel (TCH) in the GSM format, or a packet data
channel (PDCH) in the EDGE format.
Required Equipment
The following equipment is required to make loopback BER measurements.
• VSA Series Transmitter Tester, model E4406A, with the following required options:
− Option BAH - GSM Measurement Personality
NOTE
Option 202 replaces Option BAH in the VSA if EDGE support is required.
− Option 300 - 321.4 MHz IF Output
• ESG-D Series Signal Generator, models E4430B, E4431B, E4432B, or E4433B, with the
following required options:
− Option UN8 - Real-time I/Q Baseband Generator
NOTE
Option 202 EDGE is required to make EDGE loopback BER measurement.
− Option 300 - Base Station BERT (includes BER tester)
NOTE
2-2
Option UNA, Alternate Timeslot Power Level Control, is not required but is
recommended.
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Making Measurements
Measuring RF Loopback BER
Connecting the Test Equipment
Refer to the following setup diagram for connections to the ESG, VSA, and base station.
Figure 2-1 BTS Loopback Test Equipment Setup
NOTE
This example uses an ARFCN of 520 for the BCH and synchronizes to the
TCH midamble in timeslot 2 on ARFCN 570. You can substitute as
appropriate for your BTS.
All key presses assume factory defined defaults at preset.
Configuring GSM Mode on the Agilent Technologies
E4406A VSA Series Transmitter Tester
The following steps will show you how to set up the vector signal analyzer (VSA) for
synchronization.
1. To preset the VSA:
Press the Preset key.
2. To select GSM mode:
Press MODE > GSM.
Base Station BERT User’s and Programming Guide
2-3
Making Measurements
Measuring RF Loopback BER
ESG Family Signal Generators
Option 300 Preliminary Document
3. To set up GSM mode for BTS test:
Press Mode Setup > Radio > Band > DCS 1800.
Toggle Device BTS MS until BTS is underlined.
Toggle Freq Hopping On Off until Off is underlined.
4. To set the frequency:
Press FREQUENCY Channel > Center Freq.
Enter 1.8068 > GHz.
Select Burst Type > Normal.
Toggle TSC Auto Manual until Auto is underlined.
5. To lock the VSA and ESG to the BTS 13 MHz reference:
Press System > Reference.
Press Freq Ref > 13 > MHz.
Toggle Freq Ref Int Ext until Ext is underlined.
Toggle 10 MHz Out Off On until On is underlined.
Configuring GSM Mode on the ESG-D Series Signal Generator
The following steps will show you how to configure a timeslot with multiframe data, set up
traffic channel 570, and set the frequency and amplitude in GSM mode on the signal
generator.
When configuring a timeslot in this procedure, keep the following points in mind:
• Prior to synchronization, the transmitter must be configured to generate multiframe
data in the timeslot to be tested.
• TCH synchronization requires that the training sequences match between the ESG
timeslot configuration and the timeslot sent by the base station. The default for the
ESG, which is TSC0, can be modified.
1. Press Preset.
2. Press MODE > BERT > BTS BERT GSM Loopback > Configure Measurement > Transmit Settings.
3. Press the GSM On Off softkey. On is now highlighted.
4. Press the Data Format Pattern Framed softkey. Framed is now highlighted.
2-4
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Making Measurements
Measuring RF Loopback BER
Notice that the GSM timeslot pattern is displayed on the screen.
5. Press Configure Timeslots.
Press the Timeslot Off On softkey. Off is now highlighted and timeslot 0 is turned off.
6. Press Timeslot # > 2 > Enter.
Press Timeslot Type > Normal.
Press Configure Normal > E > Multiframe Channel > TCH/FS > PN9 (or PN15).
If the default training sequence (TSCO) does not match the training sequence sent by
the BTS, press Return > Return > TS and select the proper training sequence.
Press Return > Timeslot Off On. On is now highlighted.
7. Press Timeslot # > 1> Enter.
Press Timeslot Type > Normal.
Press Configure Normal > E > Multiframe Chan. > FCH/FS > PN9 (or PN15).
Press Return > Timeslot Ampl Main Delta. Delta is now highlighted.
Press Timeslot Off On. On is now highlighted.
Repeat these steps for timeslot 3.
8. Press Ampl > Alternate Amplitude > Alt Ampl Delta > 50 > dB.
9. To set up traffic channel 570 in GSM mode:
Press Mode > BERT > BTS BERT GSM Loopback.
Press Configure Measurement > Freq Channels > Channel Band > More (1 of 2) > DCS Mobile.
Press Freq Channels Off On. On is now highlighted.
Press Channel Number > 570 > Enter.
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Notice that the active entry area displays the following:
Channel: 570 (1.72180000000GHz)
10.Press Amplitude > −104 > dBm.
11.Press the RF On/Off hardkey to turn the RF output on.
Notice that the RF annunciator is turned on and the new power level is shown in the
amplitude area of the display:
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Synchronizing to the BCH
The following steps show you how to synchronize to the broadcast channel. Set up the base
station to send the BCH now. The BCH is only required to contain the synchronization
logical channel (SCH).
1. Follow the instructions under “Configuring GSM Mode on the Agilent Technologies
E4406A VSA Series Transmitter Tester” and “Configuring GSM Mode on the ESG-D
Series Signal Generator” in this chapter, to prepare the test equipment for
synchronization.
2. Press Mode > BERT > BTS BERT GSM Loopback.
3. Press Sync Source BCH TCH until BCH is highlighted.
4. Press GSM BERT Off On until On is highlighted and then press Synchronize to BCH/TCH. You
will briefly see Synchronizing to BCH flashing on the display.
Once synchronization is achieved, the ESG will expect to receive a TCH to decode and,
accordingly, will display the Waiting for TCH message.
5. Turn off the BCH signal and set up the base station to loop the TCH. The TCH is only
required to contain a valid midamble.
6. Change the VSA to the frequency of the TCH:
Press FREQUENCY Channel > Center Freq > 1.8168 > GHz.
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7. Set the ESG to expect the TCH in timeslot 2:
Press Configure Measurement > Timeslot # > 2 > Enter.
Once synchronization to the TCH is achieved, the ESG will display the TCH Sync Lock
message.
NOTE
For the EDGE format, do the following to achieve TCH Sync Lock:
Press Configure Measurement > Timeslot # > 2 > Enter > Return > Adjust Gain.
8. Now that TCH sync lock is achieved, the ESG will try to synchronize to the PN. Once
this is achieved, the ESG will display the Ready message.
Synchronizing to the TCH
The following steps show you how to synchronize to the traffic channel. The TCH is only
required to contain a valid midamble. If appropriate for your base station, this
synchronization can be performed without prior BCH synchronization.
NOTE
If the base station is transmitting a BCH signal, turn it off at this time.
1. Follow the instructions under “Configuring GSM Mode on the Agilent Technologies
E4406A VSA Series Transmitter Tester” and “Configuring GSM Mode on the ESG-D
Series Signal Generator” in this chapter, to prepare the test equipment for
synchronization.
2. Change the VSA to the frequency of the TCH:
Press FREQUENCY Channel > Center Freq.
Enter 1.8168, and then press GHz.
3. On the ESG, to select Option 300:
Press Mode > BERT > BTS BERT GSM Loopback.
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4. Press the Sync Source BCH TCH softkey. TCH is now highlighted.
5. Press Configure Measurement > Timeslot # > 2 > Enter. This sets the ESG to expect the TCH
in timeslot 2.
6. Press Return > GSM BERT Off On. On is now highlighted.
NOTE
If an error message is generated, 522 Demodulator Unleveled; Input
amplitude underrange, this indicates that the TCH signal is not being
received.
7. Press Synchronize to BCH/TCH to begin synchronization to the TCH.
Then you will see Synchronizing to TCH flashing on the display followed by the
Synchronizing to PN message.
Once synchronization is achieved, the Ready TCH Sync Lock message is displayed.
Making Loopback BER Measurements
The following procedure shows you how to configure the frame count, set pass/fail limits
and set early stop criteria for loopback BER measurements.
1. Press Configure Measurement and toggle the Measurement Mode softkey until BER% is
highlighted. Notice that the BER% Configure softkey is enabled.
2. Press BER% Configure to access the softkey menu for configuring BER%.
3. Press Frame Count > 500 > Enter. This sets the frame count to 500 frames.
Notice that the Frame Count softkey is highlighted, 500 is displayed beneath the softkey,
and Frame Count: 500 appears in the status area of the display.
4. Press Pass/Fail Limits > Class II RBER > 2 > %. This sets the pass/fail limits to 2% Class II
RBER
Notice that the Class II RBER softkey is highlighted, 2.000% RBER is displayed beneath the
softkey, and P/F: 2.0000% CII appears in the status area of the display.
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5. Press Return > Threshold # of Events to Stop > Class II Bit Error > 100 > Enter. This sets the stop
criteria threshold for 100 events
Notice that the Class II Bit Error softkey is highlighted, 100 events is displayed beneath the
softkey, and Stop Thrs: CII(100) appears in the status area of the display.
6. Press the Trigger softkey to start the measurement:
You will see Pass or Fail displayed on the lower left corner of the screen, when either of
the following occurs:
• The measurement completes normally; in this case, after 500 frames.
• The measurement terminates early, due to the designated number of events to stop
being reached.
NOTE
To select an alternate trigger mode (for example, Immediate):
Press Return three times, then press Configure Triggers > BERT Trigger Source >
Immediate.
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Using Amplitude Sensitivity Search
This procedure shows you how to set a pass amplitude with high and low amplitude
boundaries, and how to set both the target error percentage, and the frame count for an
amplitude sensitivity search.
1. Press Mode > BERT > BTS BERT GSM Loopback.
2. Press Configure Measurement > Measurement Mode BER% Search. Search is now highlighted.
Notice that the Configure Sensitivity Search and Arm Sensitivity Search softkeys are enabled.
3. Press Configure Sensitivity Search to access the softkey menu for configuring the sensitivity
search.
4. Press Frame Count > 100 > Enter.
Notice that the Frame Count softkey is highlighted and 100 is displayed beneath the key.
5. Press Target % > 2 > %.
Notice that the Target % softkey is highlighted and 2.0000% is displayed beneath the key.
6. Press Pass Amplitude > −104 > dBm.
Notice that the Pass Amplitude softkey is highlighted and −104.00 dBm is displayed beneath
the key.
7. Press High Amplitude > −95 > dBm.
Notice that the High Amplitude softkey is highlighted and −95.00 dBm is displayed beneath
the key.
8. Press: Low Amplitude > −111 > dBm.
Notice that the Low Amplitude softkey is highlighted and −111.00 dBm is displayed beneath
the key.
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9. Press Return > Arm Sensitivity Search.
10. Press Trigger to start the measurement:
After the search is complete, you will see Pass or Fail displayed on the lower left corner
of the screen, when either of the following occurs:
• The result equals or is less than the target percent within the high to low amplitude
range.
• The high or low amplitude level is passed at the target% BER/RBER.
11. Press Stop Sensitivity Search to terminate a measurement:
NOTE
To select an alternate trigger mode (for example, Immediate):
Press Return > Configure Triggers > BERT Trigger Source > Immediate.
NOTE
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For efficiency, the search routine uses shorter measurements initially with
the final measurements being over the frame length selected.
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Making Measurements
Using the External Frame Trigger Function with the EDGE Format
Using the External Frame Trigger Function with the
EDGE Format
NOTE
This function is available only when the Frame Trigger Source BCH PDCH is set to
PDCH.
The External Frame Trigger Function is used to adjust the burst timing at PDCH
synchronization. This requires calculating a delay value and then adjusting the initial
value.
Measuring the Initial Delay Value
1. Configure the BTS and the VSA setup. Refer to Figure 2-2.
Figure 2-2 System Configuration for Measuring External Delay Value
2. Set up the BTS to transmit the frame trigger EDGE burst at timeslot 0.
3. On the VSA, press Mode > EDGE w/GSM.
4. Press Measure > Waveform (Time Domain).
5. Press Meas Setup > Trig Source > Ext Front.
6. Press Makers.
7. Use the marker function to find the offset value (D), in microseconds, between the BTS
frame trigger and the starting edge of the midamble. Refer to Figure 2-3 on page 2-14.
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Figure 2-3
8. Calculate the offset value X using the following equation:
X ( Symbol ) = ( D – 227.8 ) ⁄ 3.693
Where, in the EDGE mode, 3.693 usec is equal to 1 symbol.
Adjusting the Delay Value
1. Configure the ESG, BTS, and VSA setup. Refer to Figure 2-4.
Figure 2-4
2. Press MODE > BERT > BTS BERT EDGE Loopback.
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Using the External Frame Trigger Function with the EDGE Format
3. Press EDGE BERT to On > Configure Triggers.
4. Press Frame Trigger Source BCH PDCH to PDCH.
5. Press Configure Triggers > Frame Trigger Source Int Ext to Ext.
6. Press Ext Frame Trigger Delay and enter the X value calculated in the previous section.
NOTE
If the frame trigger is in the forward direction of timeslot 0, as shown in
Figure 2-3 on page 2-14, enter the X value as a negative value.
7. Press Return > Synchronize to BCH/PDCH.
Synchronization should occur and display a Ready status. However, if Synchronizing
keeps flashing or the Ready status appears for less than a second, increase or decrease
the delay value by 2 symbols and press the Synchronize to BCH/PDCH softkey again.
Repeat this process until the Ready status (synchronization) becomes stable.
8. Press Configure Triggers > Ext Frame Trigger Delay.
9. Change the delay value by rotating the knob slowly to find the range of delay values
that display a Ready status.
NOTE
Although the delay value can be entered in 0.25 units, the actual uplink burst
position can be changed in 1.0 symbol units.
10. If the PDCH is synchronized by a delay value within a ±3 symbol range, choose the
center value to set as the frame trigger delay.
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3
Softkey Reference
This chapter describes the Mode hardkey, and explains the associated
softkeys that are used to activate functions specific to the Agilent
Technologies ESG-D Option 300, Base Station BERT.
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GSM/EDGE Base Station Test Softkeys
Access the following Option 300 softkeys to perform GSM BTS
loopback, EDGE BTS loopback, and Baseband BER tests.
Mode
This key accesses a menu of softkeys. These softkeys let you access
further menus for configuring digital modulation formats such as
Real Time I/Q Baseband or for performing bit error rate and block error rate
tests with BERT. If you have multiple options and the BERT softkey is
visible, press it and then press BTS BERT GSM Loopback to set the
parameters for performing specific bit error rate tests (BERT) for GSM
base transceiver stations (BTS), press BTS BERT EDGE Loopback to set the
parameters for performing specific block error rate tests for the EDGE
BTS, or press Baseband BERT to set the parameters for bit error rate
(BER) measurements.
NOTE
The softkeys in this section are described in alphabetical order. The
description for each softkey lists the key presses required to access the
key. If you don’t see a softkey in the indicated menu, it may be on the
next page of the menu. Press the More softkey to access the next menu
page. Refer to the Option UN8 and Option 202 user’s and programming
guide for keys not found.
Softkey location paths assume starting from a factory-defined preset
condition.
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GSM/EDGE Base Station Test Softkeys
Adjust Gain
This adjustment is necessary to start the synchronization with the
PDCH channel for the EDGE format. Therefore, this key must be used
when switching the synchronization source from the broadcast channel
(BCH), GMSK modulation, to a packet data channel (PDCH), EDGE
modulation.
This key is only enabled when EDGE BERT Off On is set to On.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Adjust Gain
Arm Sensitivity Search
This key arms the sensitivity search function. Once sensitivity search is
armed, the sensitivity search operation will run upon receiving the
selected trigger. (If Trigger Key is selected, press the Trigger hardkey to
start the search.) Press Stop Sensitivity Search to end the search
prematurely. During search, no other softkey operation is available
except Stop Sensitivity Search.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Arm Sensitivity Search
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Arm Sensitivity Search
Baseband BERT
This key accesses a menu of softkeys that enable you to set or specify all
of the parameters required to configure a bit error rate test (BERT) for
digital communication equipment.
Softkey Location (Baseband): Mode > BERT > Baseband BERT
BER% Uncoded Configure
This key accesses a menu where you can select BER% Uncoded
configuration functions such as setting the bit count, the pass/fail
limits, and the stop-on-event thresholds.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BER% Uncoded Configure
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BER Mode Off On
This key toggles the BER mode off or on. The BER on mode tracks the
number of blocks that contain bit errors.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BLER% MCS5 Configure or
BLER% MCS9 Configure,> BER Mode Off ON
BERT
This key accesses a menu of softkeys that enable you to select the type
of bit error rate test (BERT). The choices are Baseband BERT,
BTS BERT GSM Loopback, or BTS BERT EDGE Loopback.
Softkey Location: Mode > BERT
BERT Off On
Press this key to enable and disable the BER measurement function.
Default value: Off
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT > BERT
Off On
BERT Resync Off On
Sets the operating state of the resynchronizing function. This key is
valid only when the Max. Data Rate 2Mbps 10Mbps key is set to 2Mbps.
When you select On, a new BER measurement will immediately be
restarted whenever the previous BER measurement result exceeds the
value specified by the Resync Limits key.
Default value: On
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Max. Data Rate 2Mbps > BERT Resync Off On
BERT Trigger
This key accesses a menu of choices for triggering BER measurements.
You can choose triggering that occurs immediately (Immediate),
triggering by the front panel Trigger key (Trigger Key), triggering that is
supplied by the GPIB (Bus), or triggering on the positive edge of a signal
supplied to the TRIGGER IN connector (Ext).
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> BERT Trigger
Configure Trigger
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GSM/EDGE Base Station Test Softkeys
BERT Trigger Source
This key accesses a menu of choices for selecting the BERT trigger
source. You can choose triggering that occurs immediately (Immediate),
triggering by the Trigger hardkey (Trigger Key), triggering that is
supplied remotely via GPIB (Bus), or triggering on an external signal
supplied to the TRIGGER IN connector (Ext).
Default Value: Trigger Key
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> BERT Trigger Source
Configure Triggers
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > BERT Trigger Source
Bit Count
This key enables you to specify the total number of bits to be measured
for the uncoded EDGE channel.
Range: 0 through 2147483647
Default Value: 139200.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BER% Uncoded Configure >
Bit Count
Or: Mode > BERT > BTS BERT EDGE Loopback > Configure Measurement
Measurement Mode BLER% Search > Sensitivity Search Configure >
Search Uncoded Configure > Bit Count
>
Bit Delay Off On
Use this key to toggle the trigger delay for BER measurements on or off.
Default Value: Off
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure Trigger > Bit Delay Off On
BLER% MCS5 Configure
This key accesses a menu where you can select BLER% MCS5
configuration functions such as setting the block count, the pass/fail
limits, the stop-on-event thresholds, and turn the bit error rate mode off
and on.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BLER% MCS5 Configure
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BLER% MCS9 Configure
This key accesses a menu where you can select BLER% MCS9
configuration functions such as setting the block count, the pass/fail
limits, the stop-on-event thresholds, and turn the bit error rate mode off
and on.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BLER% MCS9 Configure
BLER% Configure
This key accesses a menu where you can select BLER% configuration
functions.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure
Block Count
This key enables you to specify the number of data blocks to be
measured at each measurement on the MCS5 or MCS9 channels.
NOTE
For MCS-9, only even values can be entered with a minimum value of 2.
If odd numbers are entered, a +1 will be added to the value to make it
an even value
Range: 1 to 1,500,000
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BLER% MCS5 Configure, or
BLER% MCS9 Configure > Block Count
Or: Mode > BERT > BTS BERT EDGE Loopback > Configure Measurement >
Measurement Mode BLER% Search >
Sensitivity Search Configure > Search DL MCS5 Configure or
Search DL MCS9 Configure > Block Count
Block Erasure
This key enables you to set the block erasure threshold. If the number
of erased blocks exceeds this value the measurement will end.
Range: 0 to 1,000,000 frames
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BLER% MCS5 Configure or
BLER% MCS9 Configure > Threshold # of Events to Stop > Block Erasure
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GSM/EDGE Base Station Test Softkeys
BTS BERT EDGE Loopback
This key accesses a menu of softkeys that enable you to set or specify all
of the parameters required to configure the EDGE base transceiver
station bit error rate test (BTS BERT).
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback
BTS BERT GSM Loopback
This key accesses the menu of softkeys that enable you to set or specify
all of the parameters required to configure the GSM base transceiver
station bit error rate tests (BTS BERT).
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback
Bus
This key enables a measurement to run when the appropriate GPIB
command is received, provided synchronization has already been
achieved. If not already synchronized, the trigger is ignored.
Default Value: Trigger Key
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Triggers > BERT Trigger Source > Bus
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > BERT Trigger Source > Bus
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure Trigger > BERT Trigger > Bus
Channel Band
This key accesses a menu of choices for assigning channel bands based
on the current format. The output frequency depends on both the
channel band and channel number selections.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Band
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band
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Channel Number
This key enables you to change the channel numbers (the frame carrier
frequency) based on frequency channels. To change the channel
number, rotate the front panel knob until the desired value is displayed,
use the up and down arrow keys, or enter the value using the numeric
keypad. The output frequency depends on both the channel band and
channel number selections.
Default Value: 0
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Number
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Number
Class Ib Bit Error
This key ends the measurement when the detected number of Class Ib
errors exceeds the set threshold.
Range: 0 through 1,000,000 events.
Default Value: 300 events
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback>
Configure Measurement > Configure BER% > Threshold # of Events to Stop >
Class Ib Bit Error
Class Ib RBER
This key enables you to set the pass/fail Class Ib RBER limit. Class Ib
RBER is the ratio of the number of errored Class Ib bits (after
de-convolution in the non-erased speech frames) to the total number of
Class Ib bits in the non-erased frames. The measurement fails if the
Class Ib RBER exceeds a threshold.
Range: 0% through 100% (0 to 1)
Default Value: 0.4000% RBER
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Pass/Fail Limits > Class Ib RBER
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GSM/EDGE Base Station Test Softkeys
Class II Bit Error
This key ends the measurement when the detected number of Class II
errors exceeds the set threshold.
Range: 0 through 1,000,000 events
Default Value: 300 events
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Threshold # of Events to Stop >
Class II Bit Error
Class II RBER
This key enables you to set the Pass/Fail Class II RBER limit. Class II
RBER is the ratio of the number of errored Class II bits (after
de-convolution in the non-erased speech frames) to the total number of
Class II bits in the non-erased frames. The measurement fails if the
Class II RBER exceeds a threshold.
Range: 0% through 100% (0 to 1)
Default Value: 2.0000% RBER
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Pass/Fail Limits > Class II RBER
Clock Gate Off On
This key toggles the clock gate function off and on. When you select On,
the clock signal is valid when the clock gate signal is high for the
normal (positive) mode, or low for the inverted (negative) mode. This
clock gate signal is connected to the rear panel BER GATE IN
connector.
Default value: Off
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Clock Gate Off On
Clock Gate Polarity Neg Pos
Use this key to input the polarity of the clock gate signal supplied to the
rear panel BER GATE IN connector. When you select Pos (positive), the
clock signal is valid when the clock gate signal is high; when you select
Neg (negative), the clock signal is valid when the clock gate signal is
low.
Default value: Pos
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Clock Gate On > Clock Gate Polarity Neg Pos
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Clock Polarity Neg Pos
Inputs polarity of the clock signal supplied to the rear panel BER GATE
IN connector. When you select Pos (positive), the rising edge is used;
when you select Neg (negative), the falling edge is used.
Default value: Pos (Positive)
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Clock Polarity Neg Pos
Configure BER%
This key accesses the BER% configuration functions such as setting the
frame count, the pass/fail limits, and the stop-on-event thresholds.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER%
Configure BERT
Use this key to access more menus for configuring test parameters for
BER measurements.
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT
Configure Measurement
This key accesses a menu of softkeys that enable you to configure the
test parameters for BTS BER measurements.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement
Configure Sensitivity Search
This key accesses a menu of keys that enable you to configure the
parameters for the sensitivity search function.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode BER% Search >
Configure Sensitivity Search
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Softkey Reference
GSM/EDGE Base Station Test Softkeys
Configure Triggers
This key accesses the menu of softkeys that enable you to select the
BERT trigger source, uplink timing advance, and inverting the
spectrum.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Triggers
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers
Cycle Count
This key enables you to specify the number of repetitions of BER
measurements. The range of the acceptable values is from 0 to 65,535.
With 0 set, the BER measurements are repeated till you set the BERT Off
On key to Off. Enter the value using the numeric keypad and terminate
it by pressing the Enter key.
Default value: 1
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> Cycle Count
Configure Trigger
Cycle End
This key is one of the choices in the Pass/Fail Update menu. With Cycle
selected, a pass or fail judgement is made for each BER
measurement result.
End
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> Pass/Fail Off On > Pass/Fail Update > Cycle End
Configure BERT
Data
Press this key to access a menu of choices for the incoming data pattern
to the BER DATA IN connector with either PN9 or PN15.
NOTE
Be sure to match this value to the data pattern in the traffic channel
(TCH) of the RF signal which is input to the radio under test.
Default value: PN9
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Data
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Data Polarity Neg Pos
Use this key to set the input polarity of the data signal supplied to the
rear panel BER DATA IN connector. When you select Pos (positive), the
data signal is used as it is; when you select Neg (negative), the polarity
of the data signal is inverted.
Default value: Pos
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Data Polarity Pos Neg
Delayed Bits
This key enables you to specify the number of delay bits from the
trigger event for starting BER measurements. This key is valid only
when the BERT Trigger Bit Delay key is set to On. Enter the value using the
numeric keypad and terminate it by pressing the Enter key.
Range: 0−65,535
Default value: 0
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure Trigger > Bit Delay On > Delayed Bits
Display BER % Exp
This key enables you to set the display mode for BER measurement
results. When you select %, the BER measurement results are displayed
in percent. When you select Exp, the BER measurement results are
displayed in the exponential format of n.nnnnnE-mm.
Default value: %
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Display BER % Exp
Display Update Cycle End Cont
Use this key to display the update mode during BER measurements.
When you select Cycle End, the previous BER measurement result is
displayed during the current measurement cycle. When you select Cont,
the display shows its real-time intermediate results during each BER
measurement. This key is valid only when the Max. Data Rate 2Mbps
10Mbps key is set to 2Mbps.
Default Value: Cycle End
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Display Update Cycle End Cont
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GSM/EDGE Base Station Test Softkeys
Downlink MCS-1
Press this softkey to select a downlink packet data traffic channel with
block type 5 that is in compliance with GSM 05.03.
Softkey Location(GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel >
Downlink MCS-1
Downlink MCS-5
Press this key to select a downlink packet data traffic channel with
block type 9 that is in compliance with GSM 05.03. The MCS5 radio
block contains a single RLC data block of 448 bits with a code rate of
0.37. This ensures that the maximum amount of Forward Error
Correction (FEC) has been applied to the data.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurements > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel >
Downlink MCS-5
Downlink MCS-9
Press this key to select a downlink packet data traffic channel with
block type 13 that is in compliance with GSM 05.03. The MCS9 radio
block contains two RLC data blocks of 592 bits with a code rate of 1.0.
No Forward Error Correction (FEC) has been applied to the data, thus
reducing the overhead and enabling the fastest data rate transmission.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurements > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel >
Downlink MCS-9
EDGE BERT Off On
This key toggles the EDGE BERT function on and off. Turning EDGE
BERT on will initiate synchronization to the base transceiver station
(BTS) under test. Turning EDGE BERT off will turn off any current
BER measurements.
NOTE
The following message will appear if the amplitude level is incorrect
when you toggle EDGE BERT on:
522 “Demodulator Unleveled; Input amplitude underrange.”
Default Value: Off
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
EDGE BERT Off On
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Error Count
This key enables you to set the residual error threshold for events to
stop function. To edit the error count value, press Error Count, enter the
desired value using the numeric keypad, then press the Enter key that
appears when editing commences
Range: 0 to 1,000,000
Default Value: 100
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > BER% Uncoded Configure >
Threshold # of Events to Stop > Error Count
Error Rate
This key enables you to set the frame erasure rate limit for the pass/fail
judgement function. To edit the error rate value, press Error Rate, enter
the desired value using the numeric keypad, then press the % key that
appears when editing commences.
Range: 0% to 100%
Default Value: 10.0000%
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > desired format >
Pass/Fail Limits > Error Rate
E-TCH/F43.2
Press this key to select an enhanced circuit-switched full-rate traffic
channel for 43.2 kbits/s user data in compliance with GSM 05.03.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurements > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel >
E-TCH/F43.2
Exceeds Any Limits
This key causes a FAIL status to be displayed whenever any of the
designated pass/fail limits (FER, Class Ib RBER, or Class II
RBER) has been exceeded. The pass/fail indication is provided at the
end of each measurement.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Pass/Fail Limits >
Exceeds Any Limits
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Exceeds Any Threshold
This key ends the measurement whenever the number of error events
exceeds the threshold designated in the Threshold # of Events to Stop
menu. This may occur before the number of frames to measure is
reached.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Threshold # of Events to Stop >
Exceeds Any Threshold
Ext
Press this key to enable a measurement to run when the external
trigger line goes high, provided synchronization has already been
achieved. If not already synchronized, the trigger is ignored.
Default Value: Trigger Key
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Triggers > BERT Trigger Source > Ext
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > BERT Trigger Source > Ext
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure Trigger > BERT Trigger > Ext
Ext Frame Trigger Delay
This softkey enables you to specify the delay time of the external frame
trigger in the EDGE format.
Range: −1250.0 through 1250.0
Default value: 0
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
> Ext Frame Trigger Delay
Configure Triggers
Ext Frame Trigger Polarity Neg Pos
This softkey enables you to set the external frame trigger polarity for
the EDGE loopback bit error rate measurement.
Default value: Pos
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > Ext Frame Trigger Polarity Neg Pos
Fail Hold
This key is one of the choices in the Pass/Fail Update menu. With Fail
selected, the fail judgement is made once fail has been found
Hold
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during one loop of BER repeat measurements.
Default value: Pass/Fail Update mode is set to Cycle End
Softkey Location (Baseband Bert): Mode > BERT > Baseband BERT >
Configure BERT > Pass/Fail On > Pass/Fail Update > Fail Hold
Frame Count
This key appears in two different situations, enabling you to designate
the number of frames to measure in either a sensitivity search or in a
BER% configuration.
Frame Count - Configure BER%
This key enables you to set the number of frames to measure. Unless a
stop-on-event threshold has been set, the measurement ends normally
when the selected number of speech frames have elapsed.
Range: 1 to 6,000,000
Default Value: 100
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > BER% Configure > Frame Count
Frame Count - Sensitivity Search Configure
This key enables you to set the total number of frames to measure for
the final measurements during a sensitivity search. This number
implies the number of Class Ib and Class II bits to be measured.
Range: 1 to 6,000,000
Default Value: 100
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode BER% Search >
Configure Sensitivity Search > Frame Count
Frame Erasure
This key ends the measurement when the number of erased speech
frames detected exceeds a threshold.
Range: 0 to 1,000,000
Default Value: 120
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Threshold # of Events to Stop >
Frame Erasure
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Frame Erasure Ratio
This key enables you to set the frame erasure ratio (FER) limit for the
pass/fail judgement function. The measurement fails if the FER exceeds
the set threshold.
Frame erasure ratio is the ratio of the number of speech frames erased
by the BTS to the total number of speech frames in the measurement
period.
Range: 0% to 100% (0 to 1)
Default Value: 0.1000% FER
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Pass/Fail Limits >
Frame Erasure Ratio
Frame Repeat Single Cont
This key toggles between single and continuous mode. Single mode
transmits a pattern once. Continuous mode repeats the pattern until
the selected number of speech frames have elapsed.
Selecting the single data format outputs the following sequences:
• 4-Bit Patterns (FIX4) - A single frame is generated. The 4-bit pattern
repeats until the data fields are completely filled. Each trigger
transmits the same frame.
• Other Patterns (fixed patterns of equal quantities of ones and zeroes)
- A single frame is generated. The selected pattern repeats until the
data fields are completely filled. Each trigger transmits the same
frame.
• PN9 - A single frame is generated. The data fields are filled with the
leading bits of the PN9 sequence. A trigger causes the frame to be
transmitted. The data fields of this frame are then filled sequentially
with the next series of PN9 data bits. A trigger causes the frame to
be transmitted. This process continues, transmitting the entire PN9
sequence frame by frame. The last bit of the PN9 sequence in a data
field is immediately followed by the first bit of a second PN9
sequence.
• PN15 - A single frame is generated. The data fields are filled with
the leading bits of the PN15 sequence. A trigger causes the frame to
be transmitted. The data fields of this frame are then filled
sequentially with the next series of PN15 data bits. A trigger causes
the frame to be transmitted. This process continues, transmitting
the entire PN15 sequence frame by frame. The last bit of the PN15
sequence in a data field is immediately followed by the first bit of a
second PN15 sequence.
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• User File - The user’s file should have the appropriate data to fill an
integer number of timeslots. If not, the remaining bits are truncated.
Depending on the size of the file, more than one frame can possibly
be generated.
• External Data - External data is clocked into the data fields of the
timeslot. A single frame is generated.
Combinations of these data patterns may cause some patterns to be
truncated.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Frame Repeat Single Cont
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Frame Repeat Single Cont
Frame Trigger Source BCH PDCH
This key toggles the synchronization source between BCH (broadcast
channel) or PDCH (packet data channel).
The test equipment can use a BCH signal from the BTS to determine its
required transmit timeslot, frame and multiframe timing. The BCH
signal is always transmitted in timeslot 0 and contains multiframe
information. PDCH synchronization relies on the BTS to monitor the
delay of the access bursts and update the timing advance values in the
next downlink signalling message following the access burst.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Frame Trigger Source BCH PDCH
Frame Trigger Source Int Ext
This softkey enables you to set the frame trigger source for the EDGE
loopback bit error rate measurement. Int selects an internal source as
the frame trigger signal and is the automatic setting that can not be
changed until the Frame Trigger Source BCH PDCH softkey is set to PDCH.
Ext selects an external source as the frame trigger signal for PDCH
synchronization.
Default value: Int
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > Frame Trigger Source Int Ext
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GSM/EDGE Base Station Test Softkeys
Freq Channels
This key accesses a menu of choices for assigning frequency channels
and frequency bands.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels
Freq Channels Off On
This key enables you to select whether the RF output is determined by
the frequency band and frequency channel settings (Freq Channels
On), or by the Frequency hardkey (Freq Channel Off).
Default Value: Off
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> Freq Channels > Freq Channels Off On
Configure Measurement
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
> Freq Channels > Freq Channels Off On
Configure Measurement
GSM 450 Base
This key selects GSM 450 Base as the frequency band for GSM or
EDGE. GSM 450 Base contains channels from 259 to 293.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Base >
GSM 450 Base
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Base >
GSM 450 Base
GSM 450 Mobile
This key selects GSM 450 Mobile as the frequency band for GSM or
EDGE. GSM 450 Mobile contains channels from 259 to 293.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile >
GSM 450 Mobile
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile >
GSM 450 Mobile
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GSM 450/850 Base
This key accesses a menu where you can set the base channel frequency
band. The output frequency depends on both the frequency band and
channel selections.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Base
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Base
GSM 450/850 Mobile
This key accesses a menu where you can set the mobile channel
frequency band. The output frequency depends on both the frequency
band and channel selections.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile
GSM 480 Mobile
This key selects GSM 480 Mobile as the frequency band for GSM or
EDGE. GSM 480 Mobile contains channels from 306 to 340.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile >
GSM 480 Mobile
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile >
GSM 480 Mobile
GSM 850 Base
This key selects GSM 850 Base as the frequency band for GSM or
EDGE. GSM 850 Base contains channels from 128 to 251.
Softkey Location (GSM): Mode > Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Freq Channels > Channel Band >
GSM 450/850 Base > GSM 850 Base
Softkey Location (EDGE): Mode > Mode > BERT > BTS BERT EDGE
Loopback > Configure Measurement > Transmit Settings > Freq Channels >
Channel Band > GSM 450/850 Base > GSM 850 Base
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GSM 850 Mobile
This key selects GSM 850 Mobile as the frequency band for GSM or
EDGE. GSM 850 Mobile contains channels from 128 to 251.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback>
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile >
GSM 850 Mobile
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Freq Channels > Channel Band > GSM 450/850 Mobile >
GSM 850 Mobile
GSM BERT Off On
This key toggles the GSM BERT function on or off. Turning GSM BERT
on will initiate synchronization to the base transceiver station (BTS)
under test. Turning GSM BERT off will turn off any current BER
measurements.
NOTE
The following message will appear if the amplitude level is incorrect
when you toggle GSM BERT on:
522 “Demodulator Unleveled; Input amplitude underrange.”
Default Value: Off
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
GSM BERT Off On
High Amplitude
This key enables you to set the highest amplitude of the range to be
searched.
Range:
–136 dBm to 13 dBm
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode BER% Search >
Configure Sensitivity Search > High Amplitude
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > High Amplitude
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Immediate
This key starts the measurement as soon as the ESG achieves
synchronization.
With Immediate selected, BER or BLER measurements are initiated and
repeated until you set the GSM BERT Off On key to Off, or until you set the
BERT Trigger Source to Trigger Key, Bus, or Ext.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> BERT Trigger Source > Immediate
Configure Triggers
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > BERT Trigger Source > Immediate
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure Trigger > BERT Trigger > Immediate
Impedance 75 Ohm TTL
Use the key to set the input termination mode of the rear panel BER
DATA IN, BER CLK IN, and BER GATE IN connectors.
Default value: TTL
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Impedance 75 Ohm TTL
Initial Bit Count
This key enables you to set the initial bit count for the sensitivity
search measurement function.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Search Uncoded Configure > Initial Bit Count
Initial Block Count
This key enables you to set the initial block count for the sensitivity
search measurement function.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Search DL MCS5 Configure, Search DL MCS9
Configure, or Search E-TCH/F43.2 Configure > Initial Block Count
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Low Amplitude
This key enables you to set the minimum amplitude of the range to be
searched.
NOTE
Optimum speed will be obtained if the search range is minimized to
around 5 − 10 dB.
Range: –136 dBm to 13 dBm
Default Value: −115 dBm
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback
Configure Measurement > Measurement Mode BLER% Search >
Configure Sensitivity Search > Low Amplitude
>
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Low Amplitude
Max. Data Rate 2Mbps 10Mbps
This key enables you to set the maximum data bit rate mode of BER
measurements. When you select 2Mbps, all of the functions can be
activated for BER measurements. When you select 10Mbps, the
resynchronization and special pattern ignore functions are not
available, and you can not set the Display Update Cycle End Cont key to
Cont.
Default value: 2 Mbps
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> Max. Data Rate 2Mbps 10Mbps
Configure BERT
Measurement Mode BER% Search
This key toggles the measurement mode to either BER% or Search.
Default Value: BER%
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode BER% Search
Measurement Mode BLER% Search
This key toggles the measurement mode to either BLER% or Search.
Default Value: BLER%
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search
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Multiframe Channel
This key accesses a menu of multiframe channel coding options for
filling the E fields in the selected timeslot. These options generate a
52-frame multiframe EDGE signal where frames 12, 25, 38, and 51 are
idle frames. The E fields of the active timeslots are filled with either a
PN9 or PN15 sequence which is continuously wrapped around to fill the
multiframe sequence. No RF signal is transmitted during the idle frame
period.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel
Softkey Location(EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel
No Limits
This key enables you to set no limits for pass/fail reporting. Therefore,
no pass/fail result is displayed.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Pass/Fail Limits > No Limits
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > desired format >
Pass/Fail Limits > No Limits
No Thresholds
This key applies none of the stop-on-event criteria and enables the
measurement to run for the selected number of speech frames.
Softkey Location(GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Threshold # of Events to Stop >
No Thresholds
Softkey Location(EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > desired format >
Threshold # of Events to Stop > No Thresholds
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Pass Amplitude
This key enables you to set the an amplitude value for the pass
evaluation of sensitivity search.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode BER% Search >
Configure Sensitivity Search > Pass Amplitude
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > desired format > Pass Amplitude
PN9
This key enables to select an internally generated PN9 pseudorandom
bit pattern for unframed transmission, and configuring the timeslot
data fields.
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Data > PN9
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > PN Sequence > PN9
Or: Mode > BERT > BTS BERT GSM Loopback > Configure Measurement >
Transmit Settings > Data Format Pattern Framed > Configure Timeslots >
Configure Normal > E > Multiframe Chan. > desired format > PN9
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > PN Sequence > PN9
Or: Mode > BERT > BTS BERT EDGE Loopback > Configure Measurement >
Transmit Settings > Data Format Pattern Framed > Configure Timeslots >
Configure Normal > E > Multiframe Chan. > desired format > PN9
PN15
This key enables to select an internally generated PN15 pseudorandom
bit pattern for unframed transmission, and configuring the timeslot
data fields.
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT > Data > PN15
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > PN Sequence > PN15
Or: Mode > BERT > BTS BERT GSM Loopback > Configure Measurement >
Transmit Settings > Data Format Pattern Framed > Configure Timeslots >
Configure Normal > E > Multiframe Chan. > desired format > PN15
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Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > PN Sequence > PN15
Or: Mode > BERT > BTS BERT EDGE Loopback > Configure Measurement >
Transmit Settings > Data Format Pattern Framed > Configure Timeslots >
Configure Normal > E > Multiframe Chan. > desired format > PN15
Pass Amplitude
This key enables you to set the threshold amplitude for the pass/fail
comparator result for the sensitivity search.
Range: 20.0 dBm to -136.0 dBm
Softkey Location(GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Configure Sensitivity Search > Pass Amplitude
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > desired format > Pass Amplitude
Pass/Fail Limits
This key accesses the pass/fail limit menu. A pass/fail indication is
provided at the end of each measurement and can be configured based
on the measurement exceeding none, one, or all of the following limit
criteria: FER limit, Class Ib RBER limit, Class II RBER limit. The
pass/fail limits apply to static level BER measurements (BER%).
Default Value: No Limits
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Pass/Fail Limits
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > desired format > Pass/Fail Limits
Pass/Fail Off On
Use this key to toggle the pass/fail judgement function off and on. The
pass/fail judgement function compares a BER measurement result with
the threshold level defined by the Pass/Fail Limits key, and judges whether
that BER measurement result has passed or failed.
Default value: Off
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> Pass/Fail Off On
Configure BERT
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Pass/Fail Update
This key accesses the pass/fail judgement update mode menu. With
Cycle End selected, either pass or fail judgement is made for each BER
measurement result. With Fail Hold selected, the fail judgement is made
once fail has been found during one loop of BER repeat measurements.
Default value: Cycle End
Softkey Location (Baseband BERT): Mode > BERT >Baseband BERT >
> Pass/Fail On > Pass/Fail Update
Configure BERT
Restore EDGE Factory Default
This key restores the factory default state for this mode. All attributes
of this mode, hardware configuration, framed, and unframed data, will
be restored to the factory preset state.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Transmit Settings > Restore EDGE Factory Default
Restore GSM Factory Default
This key restores the factory default state for this mode. All attributes
of this mode, hardware configuration, framed, and unframed data, will
be restored to the factory preset state.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Restore GSM Factory Default
Resync Limits
Press this key to specify the threshold level for resynchronizing BER
measurements. This key is valid only when the Max. Data Rate 2Mbps
10Mbps key is set to 2Mbps and the BERT Resync Off On key is set to On.
Enter the value using the numeric keypad and terminate it by pressing
the % or ppm key.
Range: 0.0500 to 0.4000
Default value: 0.4000
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT >
Resync Limits
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Search DL MCS5 Configure
Press this key to select the downlink MCS5 packet data channel to
configure for the sensitivity search measurement.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Search DL MCS5 Configure
Search DL MCS9 Configure
Press this key to select the downlink MCS9 packet data channel to
configure for the sensitivity search measurement.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Search DL MCS9 Configure
Search Uncoded Configure
Press this key to select the downlink uncoded channel to configure for
the sensitivity search measurement.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Search Uncoded Configure
Sensitivity Search Configure
This key accesses a menu that enables you to configure the parameters
for the sensitivity search measurement functions.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure
Special Pattern 0’s 1’s
Press this key to set the parameter of the special pattern ignore
function. With 0’s selected, more than 80 bits of 0’s are ignored when
they are detected. With 1’s selected, more than 80 bits of 1’s are ignored
when they are detected. This key is valid only when the Max. Data Rate
2Mbps 10Mbps key is set to 2Mbps and the Special Pattern Ignore Off On key
is set to On.
Default value: 0’s
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> Special Pattern Ignore Off On > Special Pattern 0’s 1’s
Configure BERT
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Special Pattern Ignore Off On
Press this key to set the operating state of the special pattern ignore
function. This function detects more than 80 bits of 0’s or 1’s in the
incoming bit stream and ignores these bits during BER measurements.
This key is valid only when the Max. Data Rate 2Mbps 10Mbps key is set to
2Mbps.
Default value: Off
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure BERT >
Special Pattern Ignore Off On
Spectrum Invert Off On
Use this key to toggle the spectrum inverting state of received RF
signal off and on.
Default Value: On
Softkey Location (SGM): Mode > BERT > BTS BERT GSM Loopback >
Configure Triggers > Spectrum Invert Off On
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > Spectrum Invert Off On
Stop Measurement
This key stops the current measurement. This key is active only when
the format is enabled.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Stop Measurement
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Stop Measurement
Stop Sensitivity Search
This key stops the sensitivity search function if it has been enabled, and
moves the softkey menu back one level to Arm Sensitivity Search.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> Arm Sensitivity Search > Stop Sensitivity Search
Configure Measurement
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Arm Sensitivity Search > Stop Sensitivity Search
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Sync Source BCH TCH
This key toggles the synchronization source between BCH (broadcast
channel) and TCH (traffic channel).
The test equipment can use a BCH signal from the BTS to determine its
required transmit timeslot, frame and multiframe timing. The BCH
signal is always transmitted in timeslot 0 and contains multiframe
information. TCH synchronization relies on the BTS to supply a TCH
training sequence to which the receiver can synchronize. However, the
receiver must be told which timeslot is being received, since it has no
absolute reference (unlike a BCH, which is always transmitted in
timeslot 0).
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Sync Source BCH TCH
Synchronize to BCH/TCH
This key releases the current synchronization with the BTS and
immediately tries to synchronize to the sync source that is currently
selected. This key also stops the measurement.
Default Value: BCH
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Synchronize to BCH/TCH
Synchronize to BCH/PDCH
This key releases the current synchronization with the BTS and
immediately tries to synchronize to the sync source that is currently
selected. This key also stops the measurement.
Default Value: BCH
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Synchronize to BCH/PDCH
Target%
This key enables you to set the target BER/RBER in percent (the
percent of allowable errors) for BER sensitivity search.
Range: 0 through 100%
Default Value: 2%
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Measurement Mode Ber% Search >
Configure Sensitivity Search > Target%
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Target BER %
This key enables you to set the target BER in percent (the percent of
allowable errors) for BER sensitivity search.
Range: 0 through 100%
Default Value: 2%Softkey Location (EDGE): Mode > BERT >
BTS BERT EDGE Loopback > Configure Measurement >
Measurement Mode BLER% Search > Sensitivity Search Configure >
Search Uncoded Configure > Target BER %
Target BLER %
This key enables you to set the target BLER in percent (the percent of
allowable errors) for BER sensitivity search.
Range: 0 through 100%
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Measurement Mode BLER% Search >
Sensitivity Search Configure > Search DL MCS5 Configure, or
Search DL MCS9 Configure > Target BLER %
TCH/FS
This key enables you to select a full rate speech traffic channel that is
in compliance with GSM 05.03.
Softkey Location(GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel > TCH/FS
Threshold # of Events to Stop
This key accesses the Threshold # of Events to Stop menu. If no stop
criteria are specified, the measurement continues until the number of
frames to measure is met.
The threshold # of events to stop applies only to the BER% or BLER%
measurement.
Range: 1 through 1,000,000
Default Value: No Thresholds
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Configure BER% > Threshold # of Events to Stop
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > BLER% Configure > Threshold # of Events to Stop
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Total Bits
Press this key to specify the total bit count to be measured for one
measurement cycle.
Range: 100 through 4,294,967,295
Default value: 10,000
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
> Total Bits
Configure BERT
Timeslot #
This key enables you to select a timeslot to be measured. Enter the
timeslot number using the front panel knob, the up and down arrow
keys, or enter the number using the numeric keypad and press the Enter
terminator key.
Default Value: 0
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> Timeslot #
Configure Measurement
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Timeslot #
Transmit Settings
This key accesses the GSM or EDGE menu of softkeys used for selecting
framed data, configuring timeslots, and selecting frequency channels.
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurement > Transmit Settings
Trigger Key
This key enables a measurement to run when the Trigger hardkey is
pressed, provided synchronization has already been achieved. If not
already synchronized, the trigger is ignored.
Default Value: Trigger Key
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> BERT Trigger Source > Trigger Key
Configure Triggers
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > BERT Trigger Source > Trigger Key
Softkey Location (Baseband BERT): Mode > BERT > Baseband BERT >
Configure Trigger > BERT Trigger > Trigger Key
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GSM/EDGE Base Station Test Softkeys
Uncoded
This key enables you to select an uncoded channel carrying only PN9 or
PN15 bits.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurements > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel > Uncoded
Uplink MCS-1
Press this softkey to select an uplink packet data traffic channel with
block type 5 that is in compliance with GSM 05.03.
Softkey Location(GSM): Mode > BERT > BTS BERT GSM Loopback >
Configure Measurement > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel > Uplink MCS-1
Uplink MCS-5
Press this key to select a uplink packet data traffic channel with block
type 9 that is in compliance with GSM 05.03. The MCS5 radio block
contains a single RLC data block of 448 bits with a code rate of 0.37.
This ensures that the maximum amount of Forward Error Correction
(FEC) has been applied to the data.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurements > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel >
Uplink MCS-5
Uplink MCS-9
Press this key to select an uplink packet data traffic channel with block
type 13 that is in compliance with GSM 05.03. The MCS9 radio block
contains two RLC data blocks of 592 bits with a code rate of 1.0. No
Forward Error Correction (FEC) has been applied to the data, thus
reducing the overhead and enabling the fastest data rate transmission.
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Measurements > Transmit Settings > Data Format Pattern Framed >
Configure Timeslots > Configure Normal > E > Multiframe Channel >
Uplink MCS-9
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Uplink Timing Advance
This key enables you to set the uplink timing advance. to between −500
and 10,000 bits with 1 bit resolution. Setting the uplink timing advance
allows you to compensate for the insertion of equipment, such as fading
simulators, into the uplink RF path.
Range: −500 to 10,000 bits (GSM)
−500 to 10,000 symbols (EDGE)
Default Value: 0
Softkey Location (GSM): Mode > BERT > BTS BERT GSM Loopback >
> Uplink Timing Advance
Configure Triggers
Softkey Location (EDGE): Mode > BERT > BTS BERT EDGE Loopback >
Configure Triggers > Uplink Timing Advance
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Display Annotation
Display Annotation
The following figure shows the display graphics that appear when the
Baseband BERT menu is accessed:
1. Setting Information
In this area, the setting information of the bit error rate tests are
displayed.
• BERT ON - Indicates that the bit error rate test (BERT) is enabled.
This field changes to BERT OFF when the BERT Off On key is set to Off.
• Data: PN9 - Indicates that a PN9 sequence has been selected for an
incoming data pattern. This field changes to PN15 when the Data key
is set to PN15.
• Data Rate: 2 Mbps - Indicates that the 2 Mbps mode has been
selected for the maximum data rate. This field changes to Data
Rate: 10 Mbps when the Max. Data Rate 2Mbps 10Mbps key is set to
10Mbps.
• Trigger: Key - Indicates that the front panel Trigger key has been
selected for a BERT trigger source. Other selections for the trigger
field include Bus, Ext, and Imm (Immediate) depending on your
BERT Trigger key setting.
• Cycle Count: 12 - Indicates the number of repetitions of BER
measurement cycles.
• Delay: On - Indicates that the trigger delay is enabled. This field
changes to Delay: Off when the Bit Delay Off On key is set to Off.
• Delayed Bit: 25000 - Indicates the number of delay bits from the
trigger event for starting BER measurements. The grey text in this
field indicates an inactive function (the trigger delay is disabled).
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• Total Bits: 100000 - Indicates the total bit count to be measured
for one measurement cycle.
• Display Update: Cont - Indicates that the continuous mode has
been selected for the display update mode. This field changes to
Display Update: Cycle End when the Display Update Cycle End Cont
key is set to Cycle End.
• Spcl Pattern Ignore: On - Indicates that the special pattern
ignore is enabled. This field changes to Spcl Pattern Ignore: Off
when the Special Pattern Ignore Off On key is set to Off.
• Special Pattern: All 0’s - Indicates that the All 0’s data pattern
is selected for special pattern ignore function. This field changes to
Spcl Pattern Ignore: All 1’s when the Special Pattern 0’s 1’s key is
set to 1’s. The grey text in this field indicates an inactive function
(the special patter ignore function is disabled).
• P/F: On(0.0100000) - Indicates that the pass/fail judgement is
enabled and its threshold level is set to 0.0100000. This field
changes to P/F Off when the Pass/Fail Off On key is set to Off and the
number in parentheses changes to display whatever value is set for
the Pass/Fail Limit key.
• P/F Update: Cycle End - Indicates that the cycle end mode has
been selected for the pass/fail judgement update mode. This field
changes to Display Update: Fail Hold when Fail Hold is selected for
the Pass/Fail Update key. The text in grey indicates an inactive function
(the pass/fail judgment is disabled).
• Resync: On(0.4000) - Indicates that the resynchronizing function is
enabled and its threshold level is set to 0.4000. This field changes to
Resync: Off when the BERT Resync Off On key is set to Off and the
number in parentheses changes to display whatever value is set for
the BERT Resync Limits key.
• Clock Pol: Pos - Indicates that the positive edge has been selected
for the input polarity of the clock signal. This field changes to Clock
Pol: Neg when the Clock Polarity Neg Pos key is set to Neg.
• Data Pol: Pos - Indicates that the data signal is used as it is for the
data signal. This field changes to Data Pol: Neg when the Data
Polarity Neg Pos key is set to Neg.
• Clock Gate: On - Indicates that the clock gate function is enabled.
This field changes to Clock Gate: Off when the Clock Gate Off On key
is set to Off.
• Gate Pol: Pos - Indicates that the clock signal is valid when the
clock gate signal is high. This field changes to Data Pol: Neg when
the Data Polarity Neg Pos key is set to Neg. The grey text in this field
indicates an inactive function (the clock gate function is disabled).
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Display Annotation
• Impedance: TTL - Indicates that the TTL has been selected for the
input termination mode. This field changes to Impedance: 75 Ohm
when the Impedance 75 Ohm TTL key is set to 75 Ohm.
2. Measurement Results
In this area, the measurement results are displayed. When the
Display Update Cycle End Cont key is set to Cycle End, the measurement
result is displayed only when the one measurement cycle has been
completed. When the Display Update Cycle End Cont key is set to Cont, the
intermediate measurement result is also displayed about every 200 ms
during the measurement cycle.
NOTE
You can select Cont only when the Max. Data Rate 2Mbps 10Mbps key is set to
2Mbps.
• Total Bits: 585792 Bits - Shows the total bit count.
• Error Bits: 5732 Bits - Shows the error bit count.
• BER: 0.97850432 % - Shows the bit error rate measurement result.
The BER measurement result can be displayed in percent or in the
exponential format.
3. Other Information
In this area, the measurement cycle counter is displayed on the right
side. When the Pass/Fail Off On key is set to On, the result of the
judgement is displayed in the center. The measurement error status
may be displayed on the left side.
• No Data - In this field, No Data or No Clock may be displayed. No
Data is displayed when there has been no data change for more than
200 clock signals. No Clock is displayed when there has been no
clock input for more than 3 seconds.
Sync Loss may be displayed under the No Data annunciator when
the synchronization is lost. (It is not shown in this example.)
• PASS - In this field, the pass/fail judgement result is displayed when
the Pass/Fail Off On key is set to On.
• Cycle Counter: 7 / 12 - Indicates the current and total
measurement cycle counts.
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Rear Panel Overview
1. BER DATA IN Connector
Input the data streams for the bit error rate measurements. The rising
(positive) or falling (negative) edge selected by the softkey or the GPIB
command of the BER CLK IN signal is used to trigger the reading of the
data. The connector type is a BNC (female). If you configure your
instrument with Option 1EM, this input is changed from a BNC to an
SMB.
2. BER CLK IN Connector
The rising (positive) or falling (negative) edge selected by the softkey or
the GPIB command of the signal causes data on the BER DATA IN
connector to be sampled. The connector type is a BNC (female). If you
configure your instrument with Option 1EM, this input is changed from
a BNC to an SMB.
3. BER GATE IN Connector
This connector can be enabled or disabled by the softkey or the GPIB
command. Input the clock gate signal for the bit error rate
measurements. The clock signal to the BER CLK IN connector is valid
only when the signal to this connector is high or low which is selected
by the softkey or the GPIB command. The connector type is a BNC
(female). If you configure your instrument with Option 1EM, this input
is changed from a BNC to an SMB.
4. BER MEAS END Connector
The BER MEAS END connector outputs the signal that indicates the
status of the bit error rate (BER) measurements. BER measurements
are being executed when the signal is high. The connector type is an
SMB (female).
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Rear Panel Overview
5. BER TEST OUT Connector
The BER TEST OUT connector outputs the signal that indicates the
test result of the pass/fail judgment of the bit error rate measurements.
The result is guaranteed at the falling edge of the signal of the MEAS
END connector. The result is pass when the signal is low; the result is
fail when the signal is high. The signal is also high when the pass/fail
judgment is set to off. The connector type is an SMB (female).
6. BER ERR OUT Connector
The output of the BER ERR OUT connector is normally low. When the
maximum data rate mode is set to 2 Mbps, the BER ERR OUT
connector outputs the pulse signals that indicate the number of the
error bits. One pulse whose width is about 80 ns indicates one error bit.
Pulses for the error bits of one measurement cycle are not synchronized
with the clock signal to the BER CLK IN connector, and are output
during the signal of the BER MEAS END connector for the
measurement cycle is high. The connector type is an SMB (female).
7. BER NO DATA Connector
The BER NO DATA connector outputs the signal that indicates the no
data status. The no data status is reported when there has been no
clock inputs for more than 3 seconds or there has been no data change
for more than 200 bits. This signal is valid only when the signal of the
BER MEAS END connector is high. No data status is detected when the
signal is low. The connector type is an SMB (female).
8. BER SYNC LOSS Connector
The BER SYNC LOSS connector outputs the signal that indicates the
synchronization loss state. This signal is only valid when the signal of
the BER MEAS END connector is high. Synchronization loss state is
detected when the signal is low. The connector type is an SMB (female).
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4
Remote Programming
This chapter contains the Option 300 Standard Commands for Programmable Instruments
(SCPI) commands. A description of each command is provided as well as syntax
requirements, ranges, restrictions, query responses, and status at *RST. Refer to Option
UN8 and Option 202 user’s and programming guide for commands not found.
For information regarding SCPI common terms, queries, implied commands, command
strings, and command syntax, refer to the main programming guide.
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Option 300 SCPI Command Reference
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Option 300 SCPI Command Reference
The following SCPI commands are used to set the controls and the parameters associated
with Option 300 functionality.
BER Clock Gate Polarity
:INPut:BERT[:Baseband]:CGATe:POLarity POSitive|NEGative
:INPut:BERT[:Baseband]:CGATe:POLarity?
This command selects the clock gate polarity. The choices are POSitive and NEGative. This
clock gate signal is supplied to the rear panel BER GATE IN port. This command is valid
only while the BER clock gate state is ON (1).
*RST value: POSitive
BER Clock Gate State
:INPut:BERT[:Baseband]:CGATe[:STATe] ON|OFF|1|0
:INPut:BERT[:Baseband]:CGATe[:STATe]?
This command enables and disables the clock gate function. The choices are ON (1) and
OFF (0).
*RST value: OFF
BER Clock Polarity
:INPut:BERT[:Baseband]:CLOCk:POLarity POSitive|NEGative
:INPut:BERT[:Baseband]:CLOCk:POLarity?
This command selects the clock polarity according to the clock signal supplied to the rear
panel BER CLK IN port. The choices are POSitive and NEGative.
*RST value: POSitive
BER Cycle Count
:SENSe:BERT[:Baseband]:TRIGger:COUNt <num>
:SENSe:BERT[:Baseband]:TRIGger:COUNt?
This command specifies the repeat times of BER measurements.
Range: 1 to 65535
*RST value: 1
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Option 300 SCPI Command Reference
BER Data Pattern
:SENSe:BERT[:Baseband]:PRBS[:DATA] PN9|PN15
:SENSe:BERT[:Baseband]:PRBS[:DATA]?
This command selects the data pattern for the incoming data bit stream to make BER
measurements. The choices are PN9 and PN15.
*RST value: PN9
BER Data Polarity
:INPut:BERT[:Baseband]:DATA:POLarity POSitive|NEGative
:INPut:BERT[:Baseband]:DATA:POLarity?
This command selects the polarity of the data signal. The choices are POSitive and
NEGative.
*RST value: POSitive
BER Display Mode
:CALCulate:BERT[:Baseband]:DISPlay:MODE PERCent|SCIentific
:CALCulate:BERT[:Baseband]:DISPlay:MODE?
This command selects the display mode for bit error rate measurement results. The choices
are PERCent and SCIentific. When you select PERCent, BER measurement results are
displayed in %. When you select SCIentific, BER measurement results are displayed in the
following format: n.nnnnnE-mm (where n.nnnnn is a floating point part and E-mm is a
power exponent part).
*RST value: PERcent
BER Display Update Mode
:CALCulate:BERT[:Baseband]:DISPlay:UPDate CEND|CONT
:CALCulate:BERT[:Baseband]:DISPlay:UPDate?
This command selects the display update mode during BER measurements. The choices
are CEND (Cycle End) and CONT (Continuous). When you select CEND, the previous BER
measurement result is displayed during the current measuring period. When you select
CONT, the display shows its real-time intermediate results during each BER
measurement.
*RST value: CEND
BER Input Impedance
:INPut:BERT[:Baseband]:IMPedance TTL|OHM_75
:INPut:BERT[:Baseband]:IMPedance?
This command selects the input impedance according to the input signals supplied to the
rear panel BER DATA IN, BER CLK IN, and BER GATE IN ports. The choices are OHM_75
(75Ω) and TTL.
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*RST value: TTL
BER Maximum Data Rate
:SENSe:BERT[:Baseband]:PRBS:MDRate BPS_2M|BPS_10M
:SENSe:BERT[:Baseband]:PRBS:MDRate?
This command selects the maximum data rate mode. The choices are BPS_2M (2 Mbps)
and BPS_10M (10 Mbps). When you select 2 Mbps, all BERT functions are available for
configuration. When you select 10 Mbps, the pass/fail judgement and special pattern
ignore functions are unavailable.
*RST value: BPS_2M
BER Measurement Result Query
:DATA:BERT[:Baseband][:DATA]? BEC|BER|BITC|JUDGe|TBEC|TBER|TBIT
This command queries the signal generator to return a measurement result value for the
variable specified after the question mark. You can specify one of the following variables:
Parameter
ALL
4-4
Description
Type
Range
Synchronize intermediate
values of Bit Error Count
(BEC), Bit Error Rate
(BER), and Bit Count
(BITC)
Integer (BEC),
0 to BITC,
Real (BER),
0 to 1,
Integer
(BITC)
0 to Total Bits
BEC
Intermediate Bit Error
Count
Integer
0 to BITC
BER
Intermediate Bit Error
Rate
Real
0 to 1
BITC
Intermediate Bit Count
Integer
0 to Total Bits
JUDGe
Pass/Fail result
String
FAIL or PASS
TBEC
Total Bit Error Count at
the one measurement
cycle end
Integer
0 to TBIT
TBER
Total Bit Error Rate at
the one measurement
cycle end
Real
0 to 1
TBIT
Total Bit Count at the one
measurement cycle end
Integer
Total Bits
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BER Pass/Fail Judgement Mode
:CALCulate:BERT[:Baseband]:COMParator:MODE CEND|FHOLd
:CALCulate:BERT[:Baseband]:COMParator:MODE?
This command selects the pass/fail judgement mode of the comparator function. The
choices are CEND (Cycle End) and FHOLd (Fail Hold). When you select CEND, each BER
measurement result is compared with the Pass/Fail Limit value and judged to make a
pass/fail test. When you select FHOLd, only one fail judgement is made once a fail has
been found during that BER measurement loop. For automated tests, use the output signal
from the rear panel BER TEST OUT port.
*RST value: CEND
BER Pass/Fail Limits
:CALCulate:BERT[:Baseband]:COMParator:THReshold <num>
:CALCulate:BERT[:Baseband]:COMParator:THReshold?
This command specifies the threshold value for the pass/fail judgement function. This
command is valid only while the BER pass/fail state command is ON (1).
Range: 0 to 1
*RST value: 0.5
BER Pass/Fail State
:CALCulate:BERT[:Baseband]:COMParator[:STATe] ON|OFF|1|0
:CALCulate:BERT[:Baseband]:COMParator[:STATe]?
This command enables and disables the pass/fail judgement function. The choices are ON
(1) and OFF (0). For automated tests, use the output signal from the rear panel BER TEST
OUT port.
*RST value: OFF
BER Resync Limits
:SENSe:BERT[:Baseband]:RSYNc:THReshold <num>
:SENSe:BERT[:Baseband]:RSYNc:THReshold?
This command specifies the threshold level for the resynchronizing function. This function
is valid only when BERT resynchronization state is set to ON.
Range: 0.05 to 0.40
*RST value: 0.40
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BER Resynchronization State
:SENSe:BERT[:Baseband]:RSYNc[:STATe] ON|OFF|1|0
:SENSe:BERT[:Baseband]:RSYNc[:STATe]?
This command enables and disables the resynchronization function. The choices are ON
(1) and OFF (0). This function is valid only when the maximum data rate is set to 2 Mbps.
*RST value: ON
BER Special Pattern Ignore Data
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore:DATA ALL_0|ALL_1
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore:DATA?
This command selects the bit parameter of the special pattern ignore function. The choices
are ALL_0 (All 0’s) and ALL_1 (All 1’s). This command is valid only when Special Pattern
Ignore state is already set to ON.
*RST value: ALL_0
BER Special Pattern Ignore State
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore[:STATe] ON|OFF|1|0
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore[:STATe]?
This command enables and disables the operating state of the special pattern ignore
function. The choices are ON (1) and OFF (0). This function detects more than 80 bits of 0's
or 1's in the incoming bit stream and ignores these bits when making BER measurements.
This command is valid only when the maximum data rate is set to 2 Mbps.
*RST value: OFF
BER Total Bits
:SENSe:BERT[:Baseband]:TBITs <num>
:SENSe:BERT[:Baseband]:TBITs?
This command specifies the total bit count to be measured.
Range: 100 to 4294967295
*RST value: 10000
BER Trigger Bit Delay
:SENSe:BERT[:Baseband]:TRIGger:BDELay <num>
:SENSe:BERT[:Baseband]:TRIGger:BDELay?
This command specifies the number of delay bits for the trigger delay. This function is
valid only when the trigger bit delay state is set to ON.
Range: 0 to 65535
*RST value: 0
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BER Trigger Bit Delay State
:SENSe:BERT[:Baseband]:TRIGger:BDELay:STATe ON|OFF|1|0
:SENSe:BERT[:Baseband]:TRIGger:BDELay:STATe?
This command enables and disables the trigger bit delay function. The choices are ON (1)
and OFF (0).
*RST value: OFF
BER Trigger Source
:SENSe:BERT[:Baseband]:TRIGger[:SOURce] IMMediate|KEY|EXT|BUS
:SENSe:BERT[:Baseband]:TRIGger[:SOURce]?
This command selects the triggering type for starting BER measurements. The choices are
BUS (trigger with a *TRG GPIB command), EXTernal (trigger with an external signal
supplied to the rear panel TRIGGER IN connector), IMMediate, and KEY (trigger using
the front panel Trigger key).
*RST value: KEY
BERT State
:SENSe:BERT[:Baseband]:STATe ON|OFF|1|0
:SENSe:BERT[:Baseband]:STATe?
This command enables and disables the BER measurement function. The choices are ON
(1) or OFF (0).
*RST value: OFF
BERT Trigger Source Selection
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce] IMMediate|KEY|EXT|BUS
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce]?
GSM
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce] IMMediate|KEY|EXT|BUS
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce]?
This command determines the trigger source for the GSM or EDGE loopback bit error rate
measurement.
• Select IMMediate to begin the measurement directly after synchronization has been
achieved.
• Select KEY to begin the measurement when the front panel Trigger key is pressed,
provided that synchronization has been achieved. If synchronization has not occurred,
the trigger is ignored.
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• Select EXT to begin the measurement as soon as a trigger signal is applied to the
TRIGGER IN rear panel connector provided that synchronization has been achieved. If
synchronization has not occurred, the trigger is ignored.
• Select BUS to begin the measurement once a GPIB trigger command is received by the
signal generator provided that synchronization has been achieved. If synchronization
has not occurred, the trigger is ignored.
An inherent variable delay will always exist when starting a measurement because the
measurement must await the start of the next speech frame after the trigger. The delay can
vary between 0 and 23 ms (5 frames) depending on where the trigger falls within the
TDMA multiframe.
A trigger is ignored unless the GSM or EDGE loopback operating state is turned on.
*RST value: KEY
Bit Count
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:BIT:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:BIT:COUNt?
This command specifies the total number of bits to be measured for the uncoded channel.
Range: 1 to 2147483647
*RST value: 139200
BLER Measurement
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:CONTain ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:CONTain?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:CONTain ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:CONTain?
:SENSe:BERT:BTS:LOOPback:EDGE:ETCH:F43:BLOCk:CONTain ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:ETCH:F43:BLOCk:CONTain?
This command enables or disables the BER measurement for MCS-5, and MCS-9 channels
in addition to the BLER measurement. When enabled, the following results can also be
returned from the measurement:
• Number of non-erased blocks that contain bit errors.
• Percentage of non-erased blocks that contain bit errors.
• Average BER of total error bit counts within non-erased blocks that contain bit errors.
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Block Count
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:BLOCk:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:BLOCk:COUNt?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:COUNt?
This command specifies the total number of blocks to be measured. If an out of range value
is entered, it will be rounded to either the minimum or maximum value.
For MCS9, only even values can be entered. If an odd number is entered, a +1 will
automatically be added to make the value even.
Range: 1 to 1500000
*RST value: 600
Class Ib Bits, Number to be Measured
:SENSe:BERT:BTS:LOOPback:GSM:FRAMe:CIB?
This query returns the total number of Class Ib bits to be measured which are calculated
from the total number of frames specified to be measured.
Range: 132 to 792000000
*RST value: 13200
Class II Bits, Number to be Measured
:SENSe:BERT:BTS:LOOPback:GSM:FRAMe:CII?
This query returns the total number of Class II bits to be measured which are calculated
from the total number of frames specified to be measured.
Range: 78 to 468000000
*RST value: 7800
Data
EDGE
:DATA:BERT:BTS:LOOPback:EDGE:MCS5[:DATA]? IEC|IEBC|DEFC|BCO|IER|IABer|
ALL|TEC|TEBC|TDEFc|TBCO|TER|TABer|TALL|JUDGe|STOP|SCAuse
:DATA:BERT:BTS:LOOPback:EDGE:MCS9[:DATA]? IEC|IEBC|DEFC|BCO|IER|IABer|
ALL|TEC|TEBC|TDEFc|TBCO|TER|TABer|TALL|JUDGe|STOP|SCAuse
:DATA:BERT:BTS:LOOPback:EDGE:UNCoded[:DATA]? IEC|IEBC|DEFC|BCO|IER|IABer|
ALL|TEC|TEBC|TDEFc|TBCO|TER|TABer|TALL|JUDGe|STOP|SCAuse
This data query returns the measurement result value for each variable.
IEC|IEBC|DEFC|BCO|IER|IABer return intermediate values. During the measurement,
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these variables are updated as well as the display information. ALL returns all
intermediate values at the same time.
At the end of the measurement, the final values are stored to:
TEC|TEBC|TDEFc|TBCO|TER|TABer variables. These variables and JUDGe|STOP|SCAuse are
not updated until the next BER measurement is completed. TALL returns all of the total
values at the same time.
IEC: intermediate error count <Integer> 0 to 1500000
IEBC: intermediate non-erased bit error blocks <Integer> 0 to 2147483647
DEFC: intermediate downlink error frame count <Integer> 0 to 750000
BCO: intermediate block or bit count <Integer> 0 to 1500000
<Integer> 0 to 2147483647 for Uncoded channel
IER: intermediate error ratio <Real> 0 to 1 (0 to 100%)
IABer: intermediate average BER within blocks that have errors <Real> 0 to 1
ALL: IEC IEBC DEFC BCO IER IABer
TEC: total error count <Integer> 0 to 1500000
<Integer> 0 to 2147483647 for Uncoded channel
TEBC: total non-erased bit error blocks<Integer> 0 to 1500000
TDEFc: total downlink error frame count <Integer> 0 to 65,535
TBCO: total block <Integer> 0 to 1500000,
<Integer> 0 to 2147483647 for Uncoded channel
TER: total error ratio <Real> 0 to 1 (0 to 100%)
TABer: total average BER within blocks that have errors <Real> 0 to 1
TALL: TEC TEBC TDEFc TBCO TER TABer JUDGe JCAuse STOP SCAUse
If accidental TCH synchronization loss caused the measurement to stop, TSLoss is
returned.
JUDGe: comparator result (TEST OUT) <Enumerated set> FAIL PASS NONE
If Pass/Fail criteria is NOLimit, NONE is returned.
STOP: if stop threshold is met? <Enumerated set> TRUE FALSE
When threshold to stop criteria is NONE, FALSE is returned.
SCAuse: stop cause <Enumerated set> NONE Ebit EBLock TSL
If accidental TCH synchronization loss caused the measurement to stop, TSL is
returned.
GSM
:DATA:BERT:BTS:LOOPback:GSM[:DATA]? IBC|IIC|FEC|DEFC|FRC|IBBer|IIBer|FER|
ALL|TIBC|TIIC|TFEC|TDEFc|TFRC|TIBBer|TIIBer|TFER|JUDGe|JCAuse|STOP|SCAuse|
TALL
This data query returns the measurement result value for each variable.
IBC|IIC|FEC|DEFC|FRC|IBBer|IIBer|FER are intermediate values, so during the
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measurement, these variables are updated as well as the display information. ALL returns
intermediate values at the same time.
At the end of the measurement, the final values are stored to:
TIBC|TIIC|TFEC|TDEFc|TFRC|TIBBer|TIIBer|TFER variables. These variables and
JUDGe|JCAuse|STOP|SCAuse are not updated until the next BER measurement is
completed. TALL returns all of the total values at the same time.
IBC: intermediate class Ib error count <Integer> 0 to 792000000
IIC: intermediate class II error count <Integer> 0 to 468000000
FEC: intermediate frame erasure count <Integer> 0 to 6000000
DEFC: intermediate downlink error frame count <Integer> 0 to 65535
FRC: intermediate frame count <Integer> 0 to 6000000
IBBer: intermediate class Ib error ratio <Real> 0 to 1 (0 to 100%)
IIBer: intermediate class II error ratio <Real> 0 to 1 (0 to 100%)
FER: intermediate frame erasure ratio <Real> 0 to 1 (0 to 100%)
ALL: IBC IIC FEC DEFC FRC IBBer IIBer FER
TIBC: total class Ib bit error count <Integer> 0 to 792000000
TIIC: total class II bit error count <Integer> 0 to 468000000
TFEC: total frame erasure count <Integer> 0 to 6000000
TDEFc: total downlink error frame count <Integer> 0 to 65535
TFRC: total frame count <Integer> 0 to 6000000
TIBBer: total class Ib error ratio <Real> 0 to 1 (0 to 100%)
TIIBer: total class II error ratio <Real> 0 to 1 (0 to 100%)
TFER: total frame erasure ratio <Real> 0 to 1 (0 to 100%)
TALL: TIBC TIIC TFEC TDEFc TFRC TIBBer TIIBer TFER JUDGe JCAuse STOP SCAUse
If accidental TCH synchronization loss caused the measurement to stop, TSLoss is
returned.
JUDGe: comparator result (TEST OUT) <Enumerated set> FAIL PASS NONE
If Pass/Fail criteria is NOLimit, NONE is returned.
JCAuse: which limit was met to cause the comparator result.
<Enumerated set> NOLimit FER CIB CII
STOP: if stop threshold is met? <Enumerated set> TRUE FALSE
When threshold to stop criteria is NONE, FALSE is returned.
SCAuse: stop cause <Enumerated set> NONE FE CIB CII TSLoss
If accidental TCH synchronization loss caused the measurement to stop, TSLoss is
returned.
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External Frame Trigger Delay
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:DELay <numaric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:DELay?
This command sets the external frame trigger delay for the EDGE loopback bit error rate
measurement.
Range: −1250.0 through 1250.0 symbols
*RST value: POSitive
External Frame Trigger Polarity
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:POLarity POSitive|NEGative
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:POLarity?
This command sets the external frame trigger polarity for the EDGE loopback bit error
rate measurement.
*RST value: POSitive
Frame Count (BER %)
:SENSe:BERT:BTS:LOOPback:GSM:FRAMe:COUNt <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:FRAMe:COUNt?
This command determines the length of the measurement specified by the total number of
frames included in one measurement.
Range: 1 to 6000000
*RST value: 100
Frame Trigger Source
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger[:SELect] INTernal|EXTernal
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger[:SELect]?
This command sets the frame trigger source for the EDGE loopback bit error rate
measurement.
*RST value: INTernal
Frame Synchronization Source
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC[:SOURce] BCH|PDCH
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC[:SOURce]?
This command specifies the synchronization source from the BTS under test. The choices
are BCH or PDCH.
*RST value: BCH
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Loopback Operating State
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE[:STATe] ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE[:STATe]?
This command turns on and off the operating state of the EDGE loopback bit error rate
function. Although you can configure the measurement parameters while the operating
state is off, any command triggers sent will be ignored until the operating state is turned
on.
NOTE
The following message will appear if the amplitude level is incorrect when
you turn EDGE BERT on:
522 “Demodulator Unleveled; Input amplitude underrange.”
*RST value: OFF
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GSM
:SENSe:BERT:BTS:LOOPback:GSM[:STATe] ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:GSM[:STATe]?
This command turns on and off the operating state of the GSM loopback bit error rate
function. Although you can configure the measurement parameters while the operating
state is off, any command triggers sent will be ignored until the operating state is turned
on.
NOTE
The following message will appear if the amplitude level is incorrect when
you turn GSM BERT on:
522 “Demodulator Unleveled; Input amplitude underrange.”
*RST value: OFF
Measurement Mode, Switching
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement[:MODE] BLER|SSEarch
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement[:MODE]?
This command changes the measurement mode between BLER% and sensitivity search.
This also changes the EDGE BERT display and enables the Configuration menu for either
the BER% Configure menu or the sensitivity search menu. If the BLER% measurement is
already running, this command will abort the BLER% measurement. If Sensitivity Search
is initiated from remote control, the BUS trigger is disallowed. If sensitivity search is
initiated from the front panel, the BUS trigger is allowed.
*RST value: BLER
GSM
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement[:MODE] BER|SSEarch
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement[:MODE]?
This command changes the measurement mode between BER% and sensitivity search.
This also changes the GSM BERT display and enables the Configuration menu for either
the BER% Configure menu or the Sensitivity Search menu. If the BER% measurement is
already running, this command will abort the BER% measurement. If sensitivity search is
initiated from remote control, the BUS trigger is disallowed. If sensitivity search is
initiated from the front panel, the BUS trigger is allowed.
*RST value: BER
Measurement Sensitivity
EDGE
:MEASure[:SCALAR]:BERT:BTS:LOOPback:EDGE:MCS5[:SENSitivity]?
:MEASure[:SCALAR]:BERT:BTS:LOOPback:EDGE:MCS9[:SENSitivity]?
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:MEASure[:SCALAR]:BERT:BTS:LOOPback:EDGE:UNCoded[:SENSitivity]?
This query returns either PASS or FAIL and the result for the measured sensitivity level.
The trigger source must be set to IMMediate to execute this command. When this
command is executed before the signal generator is synchronized with the BTS, the
message “Fail, −999.00” is displayed.
There are two other status errors that may be returned; SERR or DERR.
SERR
RF synchronization is lost during search and the search is aborted
DERR
a downlink error occurred during search and the search is aborted
When these errors are returned, the sensitivity search returns a value of −1.0.
This command can be used in both the BER% measurement or the sensitivity search mode.
If the trigger source selection is BUS, error “-214 Trigger deadlock” is generated and no
data is returned. After this command is executed, the measurement mode is in the
sensitivity search mode.
GSM
:MEASure[:SCALAR]:BERT:BTS:LOOPback:GSM[:SENSitivity]?
This query returns either PASS or FAIL and the result for the measured sensitivity level.
The trigger source must be set to IMMediate to execute this command. When this
command is executed before the signal generator is synchronized with the BTS, the
message
“Fail, −999.00” is displayed.
There are two other status errors that may be returned; SERR or DERR.
SERR
RF synchronization is lost during search and the search is aborted
DERR
a downlink error occurred during search and the search is aborted
When these errors are returned, the sensitivity search returns a value of −1.0.
This command can be used in both the BER% measurement or the sensitivity search mode.
If the trigger source selection is BUS, error “-214 Trigger deadlock” is generated and no
data is returned. After this command is executed, the measurement mode is in the
sensitivity search mode.
Measurement, Stopping
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement:STOP
This command immediately stops any current measurement and releases the PRBS
synchronization. After the synchronization is released, a new PRBS synchronization is
attempted.
GSM
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement:STOP
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This command stops any current measurement and releases the current PRBS
synchronization. After the synchronization is released, a new PRBS synchronization is
attempted.
Pass/Fail Limit, Class Ib RBER
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:CIB <numeric_value>
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:CIB?
This command sets the pass/fail threshold value for Class II residual bit error rate.
Range: 0 to 1 (0% to 100%)
*RST value: 0.004
Pass/Fail Limit, Class II RBER
:CALCulate:BERT:COMParator[:CRITeria]:CII <numeric_value>
:CALCulate:BERT:COMParator[:CRITeria]:CII?
This command sets the pass/fail threshold value for Class Ib residual bit error rate.
Range: 0 to 1 (0% to 100%)
*RST value: 0.020 (2.0000%).
Pass/Fail Limit, Error Rate
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria:
ERATe <numeric_value>
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria:ERATe?
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria:
ERATe <numeric_value>
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria:ERATe?
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:CRITeria:
ERATe <numeric_value>
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:CRITeria:ERATe?
This command sets the pass/fail threshold value for error rate. If an out-of-range value is
set, the value will be rounded to either the minimum or maximum limit value.
Range: 0 to 1500000 for MCS5, MCS9
0 to 2147483647 for Uncoded channel
*RST value: 0.1 MCS5, MCS9
0.02 Uncoded
Pass/Fail Limit, Frame Erasure Ratio
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:
FERasure <numeric_value>
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:FERasure?
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This command sets the pass/fail threshold value for frame erasure rate.
Range: 0 to 1 (0% to 100%).
*RST value: 0.001 (0.1000%).
Pass/Fail Limit, Selection
EDGE
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria
[:SELect] ERATe|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria[SELect]?
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria
[:SELect] ERATe|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria[SELect]?
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:CRITeria
[:SELect] EBIT|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:CRITeria[SELect]?
This command determines which of the following pass/fail limit (comparator) criteria is
applied to the measurement.
• Select ERATe to report the pass or fail status compared to the specified threshold for
error rate.
• Select NOLimit to disable the pass/fail indication.
*RST value: NOLimit
GSM
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria[:SELect] FERasure|
CIB|CII|ANY|NOLimit
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria[SELect]?
This command determines which of the following pass/fail limit (comparator) criteria is
applied to the measurement.
• Select FERasure to report the pass or fail status compared to the specified threshold for
frame erasure ratio.
• Select CIB to report the pass or fail status compared to the specified threshold for the
number of Class Ib errors detected in the measurement.
• Select CII to report the pass or fail status compared to the specified threshold for the
number of Class II errors detected in the measurement.
• Select ANY to report the pass or fail status compared to all of the specified comparator
criteria.
• Select NOLimit to disable the pass/fail indication.
*RST value: NOLimit
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Sensitivity Search, Bit Count
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:SBIT:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:SBIT:COUNt?
This command specifies the total number of bits to be measured during sensitivity search
for the uncoded channel.
Range: 13920 to 2147483647
*RST value: 13920
Sensitivity Search, Block Count
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:SBLOck:COUNt <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:SBLOck:COUNt?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:SBLOck:COUNt <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:SBLOck:COUNt?
This command specifies the total number of blocks to be measured at each measurement
during the sensitivity search.
For MCS9, only even values can be entered. If an odd number is entered, a 1 will
automatically be added to make the value even.
Range: 1 to 1500000
*RST value: 1200
Sensitivity Search, Frame Count
:SENSe:BERT:BTS:LOOPback:GSM:SFRame:COUNt <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:SFRame:COUNt?
This command specifies the total number of frames to be measured for the final
measurements during the sensitivity search.
Range: 1 to 6000000
*RST value: 100
Sensitivity Search, Initial Bit Count
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:SBIT:INITial <value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:SBIT:INITial?
This command specifies the total number of bits to be measured at the beginning of the
sensitivity search for the uncoded channel.
Range: 13920 to 2147483647
*RST value: 13920
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Sensitivity Search, Initial Block Count
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:SBLOck:INITial <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:SBLOck:INITial?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:SBLOck:INITial <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:SBLOck:INITial?
This command specifies the total number of blocks to be measured at the beginning of each
measurement during the sensitivity search.
For MCS9, only even values can be entered. If an odd number is entered, a 1 will
automatically be added to make the value even.
Range: 1 to 1500000
*RST value: 600
Sensitivity Search, Initial Frame Count
:SENSe:BERT:BTS:LOOPback:GSM:SFRame:INITial <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:SFRame:INITial?
This command specifies the number of frames to be measured while sensitivity search is
running rough searching to gain search speed. It is the first phase of sensitivity search.
Range: 1 to 6000000
*RST value: 26
Sensitivity Search, Target Error Level
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:ESENsitivity?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:ESENsitivity?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:ESENsitivity?
This command specifies the target error rate when performing a sensitivity search.
Range: 10-6 to 1 (100%)
*RST value: 0.02 Uncoded,
0.10 MCS5 or MCS9
GSM
:SENSe:BERT:BTS:LOOPback:GSM:ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:ESENsitivity?
This command specifies the target error rate when performing a sensitivity search.
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Range: 10-6 to 1 (100%)
*RST value: 0.02
Sensitivity Search, High Amplitude
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:HAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:HAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:HAMPlitude?
This command specifies the maximum amplitude level for performing a sensitivity search.
The high amplitude value can not be lower than the low amplitude value.
Range: 20.0 dBm to −136.0 dBm
*RST value: −90.0 dBm MCS5
−80.0 dBm MCS9
−85.0 dBm Uncoded
GSM
:SENSe:BERT:BTS:LOOPback:GSM:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:HAMPlitude?
This command specifies the maximum amplitude level for performing a sensitivity search.l
Range: 20.0 dBm to −136.0 dBm
*RST value: −90.0 dBm.
Sensitivity Search, Low Amplitude
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:LAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:LAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:LAMPlitude?
This command specifies the minimum amplitude level for performing a sensitivity search.
The low amplitude value can not be higher than the high amplitude value.
Range: 20.0 dBm to −136.0 dBm
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*RST value: −110.0 dBm MCS5
−100.0 dBm MCS9
−105.0 dBm Uncoded
GSM
:SENSe:BERT:BTS:LOOPback:GSM:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:LAMPlitude?
This command specifies the minimum amplitude level for performing a sensitivity search.
Range: 20.0 dBm to −136.0 dBm
*RST value: −115.0 dBm
Sensitivity Search, Pass Amplitude
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:PAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:PAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:PAMPlitude?
This command specifies the threshold amplitude for Pass/Fail comparator results when
performing a sensitivity search.
Range: 20.0 dBm to −136.0 dBm
*RST value: −101.0 dBm MCS5
−91.5 dBm MCS9
−95.0 dBm Uncoded
GSM
:SENSe:BERT:BTS:LOOPback:GSM:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:PAMPlitude?
This command specifies the threshold amplitude for Pass/Fail comparator results when
performing a sensitivity search.
Range: 20.0 dBm to −136.0 dBm
*RST: −104.0 dBm
Spectrum Invert
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:SINVert ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:SINVert?
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Execute this command to turn the spectrum inverting function on or off. Turning spectrum
invert to on, specifies that the EDGE demodulator invert the spectrum of the received RF
signal.
*RST value: ON
GSM
:SENSe:BERT:BTS:LOOPback:GSM:SINVert ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:GSM:SINVert?
Execute this command to turn the spectrum inverting function on or off. Turning spectrum
invert to on, specifies that the GSM demodulator invert the spectrum of the received RF
signal.
*RST value: ON
Status Subsystem
Data Questionable BERT Status Group Condition Register Query
:STATus:QUEStionable:BERT:CONDition?
This command returns the decimal value of the sum of the bits in the Data Questionable
BERT Condition Register. For example, if no clock signal has not been input for more than
three seconds during the bit error rate measurements (bit 0), then a value of 1 is returned.
Note that the data in this register is continuously updated and reflects the current
conditions.
Data Questionable BERT Status Group Enable
:STATus:QUEStionable:BERT:ENAble <val>
:STATus:QUEStionable:BERT:ENAble?
This command determines what bits in the Data Questionable BERT Status Group Event
Register will set the Data Questionable BERT Summary bit (bit 12) in the Data
Questionable Status Group Condition Register. The variable <val> is the sum of the
decimal values of the bits you want to enable.
Data Questionable BERT Status Negative Transition Filter Register
Enable
:STATus:QUEStionable:BERT:NTRansition <val>
:STATus:QUEStionable:BERT:NTRansition?
This command determines what bits in the Data Questionable BERT Status Group
Condition Register will set the corresponding bit in the Data Questionable BERT Status
Group Event Register when that bit has a negative transition (1 to 0). The variable <val>
is the sum of the decimal values of the bits that you want to enable.
Data Questionable BERT Status Positive Transition Filter Register
Enable
:STATus:QUEStionable:BERT:PTRansition <val>
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:STATus:QUEStionable:BERT:PTRansition?
This command determines what bits in the Data Questionable BERT Status Group
Condition Register will set the corresponding bit in the Data Questionable BERT Status
Group Event Register when that bit has a positive transition (0 to 1). The variable <val> is
the sum of the decimal values of the bits that you want to enable.
Data Questionable BERT Status Group Event Register Query
:STATus:QUEStionable:BERT[:EVENt]?
This command returns the decimal value of the sum of the bits in the Data Questionable
BERT Event Register. For example, if no clock signal for the bit error rate tests has not
been input for more than three seconds (bit 0), then a 1 is returned. Note that the register
requires that the equivalent PTR or NTR filters be set before a condition register bit can
set a bit in the Event register. Note also that the data in this register is latched until it is
queried. Once queried, the data is cleared.
Data Questionable Condition Query
:STATus:QUEStionable:CONDition?
This command returns the decimal value of the sum of the bits in the Data Questionable
Condition Register. For example, if a reference oscillator oven (ESG-AP, ESG-DP, and
Option 1E5 only) is cold (bit 4), then a value of 16 is returned. Note that the data in this
register is continuously updated and reflects current conditions.
Data Questionable Status Group Enable
:STATus:QUEStionable:ENABle <val>
:STATus:QUEStionable:ENABle?
This command determines what bits in the Data Questionable Status Group Event
Register will set the Data Questionable Status Group Summary bit (bit 3) in the Status
Byte Register. The variable <val> is the sum of the decimal values of the bits you want to
enable.
Data Questionable Status Negative Transition Filter Register Enable
:STATus:QUEStionable:NTRansition <val>
:STATus:QUEStionable:NTRansition?
This command determines what bits in the Data Questionable Status Group Condition
Register will set the corresponding bit in the Data Questionable Status Group Event
Register when that bit has a negative transition (1 to 0). The variable <val> is the sum of
the decimal values of the bits that you want to enable.
Data Questionable Condition Positive Transition Filter Register Enable
:STATus:QUEStionable:PTRansition <val>
:STATus:QUEStionable:PTRansition?
This command determines what bits in the Data Questionable Status Group Condition
Register will set the corresponding bit in the Data Questionable Status Group Event
Register when that bit has a positive transition (0 to 1). The variable <val> is the sum of
the decimal values of the bits that you want to enable.
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Data Questionable Status Group Event Register Query
:STATus:QUEStionable[:EVENt]?
This command returns the decimal value of the sum of the bits in the Data Questionable
Event Register. For example, if the instrument has just been connected to line power and
the Reference Oscillator Oven (ESG-AP, ESG-DP, and Option 1E5 only) is cold (bit 4), then
a value of 16 is returned. Note that the register requires that the equivalent PTR or NTR
filters be set before a condition register bit can set a bit in the event register. Note also that
the data in this register is latched until it is queried. Once queried, the data is cleared.
Standard Operation Status Group Condition Register Query
:STATus:OPERation:CONDition?
This command returns the decimal value of the sum of the bits in the Standard Operation
Status Group Event Register. For example, if a sweep is in progress (bit 3), then the value
8 is returned.
Standard Operation Status Group Enable
:STATus:OPERation:ENAble <val>
:STATus:OPERation:ENAble?
This command determines what bits in the Standard Operation Status Group Event
Register will set the Standard Operation Status Group Summary bit (bit 7) in the Status
Byte Register. The variable <val> is the sum of the decimal values of the bits you want to
enable.
Standard Operation Status Group Negative Transition Filter Register
Enable
:STATus:OPERation:NTRansition <val>
:STATus:OPERation:NTRansition?
This command determines what bits in the Standard Operation Status Group Event
Register will set the corresponding bit in the Standard Operation Status Group Event
Register when that bit has a negative transition (1 to 0). The variable <val> is the sum of
the decimal values of the bits that you want to enable.
Standard Operation Status Group Positive Transition Filter Register
Enable
:STATus:OPERation:PTRansition <val>
:STATus:OPERation:PTRansition?
This command determines what bits in the Standard Operation Status Group Event
Register will set the corresponding bit in the Standard Operation Status Group Event
Register when that bit has a positive transition (0 to 1). The variable <val> is the sum of
the decimal values of the bits that you want to enable.
Standard Operation Status Group Event Register Query
:STATus:OPERation[:EVENt]?
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This command returns the decimal value of the sum of the bits in the Standard Operation
Event Register. For example, if a sweep is in progress (bit 3), then the value 8 is returned.
Note that the register requires that the equivalent PTR or NTR filters be set before a
condition register bit can set a bit in the event register. Also note that the data in the
register is latched until it is queried. Once queried, the data is cleared.
Stop Measurement Threshold Criteria, Class Ib Bit Error
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:CIB <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:CIB?
This command specifies the threshold number of Class Ib errors to stop the measurement.
Range: 0 to 1000000
*RST value: 300
Stop Measurement Threshold Criteria, Class II Bit Error
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:CII <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:CII?
This command specifies the threshold number of Class II errors to stop the measurement.
Range: 0 to 1000000
*RST value: 300
Stop Measurement Threshold Criteria, Frame Erasure
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:FERasure <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:FERasure?
This command specifies the threshold number of erased frames to stop the measurement.
Range: 0 to 1000000
*RST value: 120
Stop Measurement Threshold Criteria, Number of Events
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria[:SELect] EBLock|NONE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria[:SELect] EBLock|NONE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria[:SELect] EBIT|NONE
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria[:SELect]?
This command determines which of the following threshold criteria is used to prematurely
stop the measurement prior to the normal measurement end. In each case, the
measurement will terminate no later than 200 ms after the threshold is exceeded.
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• Select EBIT to specify the number of bit errors.
• Select EBLock to specify the number of non-erased block contains or bit error.
• Select NONE to disable the stop measurement threshold criteria function.
*RST value: NONE
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria:EBIT <value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria:EBIT?
This command specifies the threshold limit to stop the measurement which is either the
number of block erasures or bit error depending on the measurement channel type.
Range: 0 to 2147483647
*RST value: 2784
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria:EBLock <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria:EBLock?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria:EBLock <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria:EBLock?
This command specifies the threshold limit to stop the measurement which is the number
of non-erased blocks that contain bit errors.
Range: 0 to 1500000
*RST value: 60
GSM
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect] FERasure|CIB|CII|
ANY|NONE
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect]?
This command determines which of the following threshold criteria is used to prematurely
stop the measurement prior to the normal measurement end. In each case, the
measurement will terminate no later than 200 ms after the threshold is exceeded.
• Select FERasure to end the measurement when the number of erased frames exceeds
the specified threshold.
• Select CIB to end the measurement when the number of Class Ib errors detected
exceeds the specified threshold.
• Select CII to end the measurement when the number of Class II errors detected exceeds
the specified threshold.
• Select ANY to end the measurement when any of the above stop measurement threshold
criteria is exceeded.
• Select NONE to disable the stop measurement threshold criteria function, so that the
measurement runs for the specified number of speech frames.
*RST value: NONE.
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Sync Source
GSM
:SENSe:BERT:BTS:LOOPback:GSM:SYNC[:SOURce] BCH|TCH
:SENSe:BERT:BTS:LOOPback:GSM:SYNC[:SOURce]?
This command specifies the synchronization source from the BTS under test. The choices
are BCH or TCH.
*RST value: BCH
Sync Signal Adjustment
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC:AGAin
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC:AGAin?
This command adjusts the input signal level of the internal demodulator. Use this
adjustment when switching from BCH synchronization to PDCH synchronization.
Synchronizing
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC:RF
This command releases the current synchronization with the BTS and immediately starts
to try to synchronize to either a BCH or PDCH signal as selected with the SYNC[:SOURce]
command. This command will also stop the current measurement.
GSM
:SENSe:BERT:BTS:LOOPback:GSM:SYNC:RF
This command releases the current synchronization with the BTS and immediately starts
to try to synchronize to either a BCH or TCH signal as selected with the SYNC[:SOURce]
command. This command will also stop the current measurement.
The test equipment can use a BCH signal from the BTS to determine its required transmit
timeslot, frame and multiframe timing. The BCH signal is always transmitted in timeslot
0 and contains multiframe information. Use BCH when a BCH subset is present which
contains SCH bursts with a properly coded T2 parameter.
Use TCH when providing a TCH/FS training sequence from the BTS. However, only one
timeslot from the BTS can be active at a time and you must specify to the receiver which
timeslot is being received since it has no absolute reference (unlike a BCH signal, which is
always transmitted in timeslot 0).
*RST value: BCH
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Timeslot Selection
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement:TSLot 0|1|2|3|4|5|6|7
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement:TSLot?
This command specifies the timeslot number in which the measurement is to be
performed. This command couples the selected timeslot number with the EDGE
configuration.
The following EDGE timeslot configuration conditions will generate error message “-221
Settings Conflict”:
• If the specified timeslot does not have one of the BLER/BER measurable channel types,
which are uncoded, MCS-9, and MCS-5.
• If the specified timeslot is not set to “Normal.”
Changing the timeslot configuration from the EDGE menu will not generate an error
message under the following conditions unless EDGE BERT is on and the timeslot is on
while EDGE is on:
• No conflict.
• If EDGE BERT is off.
• If the timeslot is off.
*RST value: 0
GSM
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement:TSLot 0|1|2|3|4|5|6|7
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement:TSLot?
This command specifies the timeslot number in which the measurement is to be
performed. This command couples the selected timeslot number with the GSM
configuration.
The following GSM timeslot configuration conditions will generate error message “-221
Settings Conflict”:
• If the specified timeslot E field fails to designate either MPN9 or MPN15.
• If the specified timeslot is not set to “Normal.”
Changing the timeslot configuration from the GSM menu won’t generate error messages
under the following conditions:
• No conflict.
• If GSM BERT is off.
• If the timeslot is off.
Range: 0 to 7
*RST value: 0
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Uplink Timing Advance
EDGE
:SENSe:BERT:BTS:LOOPback:EDGE:ULINk:OFFSet <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:ULINk:OFFSet?
This command specifies, in symbols, the amount of compensation for the insertion of
equipment such as fading simulators into the uplink RF path.
Range: −500 to 10000
*RST Value: 0
GSM
:SENSe:BERT:BTS:LOOPback:GSM:ULINk:OFFSet <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:ULINk:OFFSet?
This command specifies the amount of compensation for the insertion of equipment such as
fading simulators into the uplink RF path.
Range: −500 to 10000
*RST Value: 0
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5
Softkey/Command Cross-Reference
This chapter cross-references the Option 300 softkeys with their corresponding SCPI
commands. A similar cross reference exists for other options and the main programming
guide includes a cross-reference for the standard signal generator features.
Refer to Option UN8 and Option 202 user’s and programming guide for references not
found in this guide.
Base Station BERT User’s and Programming Guide
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Softkey/Command Cross-Reference
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Option 300 Preliminary Document
Table 5-1 Softkeys and Their Corresponding SCPI Commands
Key
Adjust Gain
BER Mode
Off On
SCPI Command
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC:AGAin
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC:AGAin?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:CONTain ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:CONTain?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:CONTain ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:CONTain?
BERT Off On
:SENSe:BERT[:Baseband]:STATe ON|OFF|1|0
:SENSe:BERT[:Baseband]:STATe?
BERT Resync
Off On
:SENSe:BERT[:Baseband]:RSYNc[:STATe] ON|OFF|1|0
:SENSe:BERT[:Baseband]:RSYNc[:STATe]?
BERT Trigger
:SENSe:BERT[:Baseband]:TRIGger[:SOURce] IMMediate|KEY|
BUS|EXTernal
:SENSe:BERT[:Baseband]:TRIGger[:SOURce]?
BERT Trigger
Source
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce] IMMediate|KEY|
EXT|BUS
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce]?
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce] IMMediate|KEY|
EXT|BUS
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce]?
Bit Count
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:BIT:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:BIT:COUNt?
Bit Delay Off On
:SENSe:BERT[:Baseband]:TRIGger:BDELay:STATe ON|OFF|1|0
:SENSe:BERT[:Baseband]:TRIGger:BDELay:STATe?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:BLOCk:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:BLOCk:COUNt?
Block Count
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:COUNt <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:BLOCk:COUNt?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria:
EBLock <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria:EBLock?
Block Erasure
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria:
EBLock <value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria:EBLock?
:SENSe:BERT[:Baseband]:TRIGger[:SOURce] BUS
:SENSe:BERT[:Baseband]:TRIGger[:SOURce]?
Bus
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce] BUS
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce]?
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce] BUS
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce]?
5-2
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Key
Softkey/Command Cross-Reference
SCPI Command
Class Ib Bit
Error
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:
CIB <numeric_event>
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:CIB?
Class Ib RBER
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:
CIB <numeric_value>
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:CIB?
Class II Bit
Error
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:
CII <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:CII?
Class II RBER
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:
CII <numeric_value>
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:CII?
Clock Gate Off
On
:INPut:BERT[:Baseband]:CGATe[:STATe] ON|OFF|1|0
:INPut:BERT[:Baseband]:CGATe[:STATe]?
Clock Gate
Polarity Neg
Pos
:INPut:BERT[:Baseband]:CGATe:POLarity NEGative|POSitive
:INPut:BERT[:Baseband]:CGATe:POLarity?
Clock Polarity
Neg Pos
:INPut:BERT[:Baseband]:CLOCk:POLarity NEGative|POSitive
:INPut:BERT[:Baseband]:CLOCk:POLarity?
Cycle Count
:SENSe:BERT[:Baseband]:TRIGger:COUNt <num>
:SENSe:BERT[:Baseband]:TRIGger:COUNt?
Cycle End
:CALCulate:BERT[:Baseband]:COMParator:MODE CEND
:CALCulate:BERT[:Baseband]:COMParator:MODE?
Data
:SENSe:BERT[:Baseband]:PRBS[:DATA] PN9|PN15
:SENSe:BERT[:Baseband]:PRBS[:DATA]?
Data Polarity
Neg Pos
:INPut:BERT[:Baseband]:DATA:POLarity NEGative|POSitive
:INPut:BERT[:Baseband]:DATA:POLarity?
Delayed Bits
:SENSe:BERT[:Baseband]:TRIGger:BDELay <num>
:SENSe:BERT[:Baseband]:TRIGger:BDELay?
Display BER %
Exp
:CALCulate:BERT[:Baseband]:DISPlay:MODE PERCent|SCIentific
:CALCulate:BERT[:Baseband]:DISPlay:MODE?
Display Update
Cycle End Cont
:CALCulate:BERT[:Baseband]:DISPlay:UPDate CEND|CONT
:CALCulate:BERT[:Baseband]:DISPlay:UPDate?
Downlink
MCS-1
[:SOURce]:RADio:GSM:SLOT0|[1]|2|3|4|5|6|7:NORMal:
ENCRyption DMCS1
[:SOURce]:RADio:GSM:SLOT0|[1]|2|3|4|5|6|7:NORMal:ENCRyption?
Downlink
MCS-5
[:SOURce]:RADio:EDGE:SLOT0|[1]|2|3|4|5|6|7:NORMal:ENCRyption:
DLINk:MCS5:DATA PN9|PN15
[:SOURce]:RADio:EDGE:SLOT0|[1]|2|3|4|5|6|7:NORMal:ENCRyption:
DLINk:MCS5:DATA?
Base Station BERT User’s and Programming Guide
5-3
Softkey/Command Cross-Reference
Key
ESG Family Signal Generators
Option 300 Preliminary Document
SCPI Command
Downlink
MCS-5
[:SOURce]:RADio:EDGE:SLOT0|[1]|2|3|4|5|6|7:NORMal:ENCRyption:
DLINk:MCS9:DATA PN9|PN15
[:SOURce]:RADio:EDGE:SLOT0|[1]|2|3|4|5|6|7:NORMal:ENCRyption:
DLINk:MCS9:DATA?
EDGE BERT
Off On
:SENSe:BERT:BTS:LOOPback:EDGE[:STATe] ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE[:STATe]?
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria:
ERATe <numeric_value>
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:
CRITeria:ERATe?
Error Rate
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:
CRITeria:ERATe <numeric_value>
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:
CRITeria:ERATe?
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:
CRITeria:ERATe <numeric_value>
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:
CRITeria:ERATe?
Exceeds Any
Limits
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria
[:SELect] ANY
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria[SELect]?
Exceeds Any
Threshold
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect] ANY
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect]?
:SENSe:BERT[:Baseband]:TRIGger[:SOURce] EXTernal
:SENSe:BERT[:Baseband]:TRIGger[:SOURce]?
Ext
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce] EXT
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce]?
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce] EXT
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce]?
Ext Frame
Trigger Delay
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:
DELay <numaric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:DELay?
Ext Frame
Trigger Polarity
Neg Pos
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:
POLarity POSitive|NEGative
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger:EXTernal:POLarity?
Fail Hold
:CALCulate:BERT[:Baseband]:COMParator:MODE FHOLd
:CALCulate:BERT[:Baseband]:COMParator:MODE?
Frame Count
:SENSe:BERT:BTS:LOOPback:GSM:FRAMe:COUNt <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:FRAMe:COUNt?
:SENSe:BERT:BTS:LOOPback:GSM:SFRame:COUNt <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:SFRame:COUNt?
5-4
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Key
Softkey/Command Cross-Reference
SCPI Command
Frame Erasure
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:
FERasure <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria:FERasure?
Frame Erasure
Ratio
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:
FERasure <numeric_value>
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria:
FERasure?
Frame Trigger
Source
BCH PDCH
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC[:SOURce] BCH|PDCH
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC[:SOURce]?
Frame Trigger
Source Int Ext
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger[:SELect] INTernal|
EXTernal
:SENSe:BERT:BTS:LOOPback:EDGE:FTRigger[:SELect]?
GSM BERT
Off On
:SENSe:BERT:BTS:LOOPback:GSM[:STATe] ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:GSM[:STATE]?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:HAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:HAMPlitude?
High Amplitude
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:
HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:HAMPlitude?
:SENSe:BERT:BTS:LOOPback:GSM:HAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:HAMPlitude?
:SENSe:BERT[:Baseband]:TRIGger[:SOURce] IMMediate
:SENSe:BERT[:Baseband]:TRIGger[:SOURce]?
Immediate
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce] IMMediate
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce]?
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce] IMMediate
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce]?
Impedance 75
Ohm TTL
:INPut:BERT[:Baseband]:IMPedance OHM_75|TTL
:INPut:BERT[:Baseband]:IMPedance?
Initial Bit Count
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:SBIT:INITial <value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:SBIT:INITial?
Initial Block
Count
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:SBLOck:
INITial <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:SBLOck:INITial?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:SBLOck:
INITial <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:SBLOck:INITial?
Base Station BERT User’s and Programming Guide
5-5
Softkey/Command Cross-Reference
Key
ESG Family Signal Generators
Option 300 Preliminary Document
SCPI Command
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:LAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:LAMPlitude?
Low Amplitude
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:
LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:LAMPlitude?
:SENSe:BERT:BTS:LOOPback:GSM:LAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:LAMPlitude?
Max. Data Rate
2Mbps 10Mbps
:SENSe:BERT[:Baseband]:PRBS:MDRate BPS_2M|BPS_10M
:SENSe:BERT[:Baseband]:PRBS:MDRate?
Measurement
Mode BER%
Search
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement[:MODE] BER|SSEarch
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement[:MODE]?
Measurement
Mode BLER%
Search
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement[:MODE] BLER|SSEarch
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement[:MODE]?
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria
[:SELect] NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria
[SELect]?
.
No Limits
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria
[:SELect] NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria
[SELect]?
:CALCulate:BERT:BTS:LOOPback:EDGE:ETCH:F43:COMParator:
CRITeria[:SELect] NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:ETCH:F43:COMParator:
CRITeria[SELect]?
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:
CRITeria[:SELect] NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:
CRITeria[SELect]?
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria
[:SELect] NOLimit
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria[SELect]?
5-6
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Key
Softkey/Command Cross-Reference
SCPI Command
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria
[:SELect] NONE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria[:SELect]?
No Thresholds
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria
[:SELect] NONE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria
[:SELect] NONE
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect] NONE
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:PAMPlitude?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:PAMPlitude?
Pass Amplitude
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:
PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:PAMPlitude?
:SENSe:BERT:BTS:LOOPback:GSM:PAMPlitude <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:PAMPlitude?
Pass/Fail Limits
:CALCulate[:Baseband]:BERT:COMParator:THReshold <num>
:CALCulate[:Baseband]:BERT:COMParator:THReshold?
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria
[:SELect] ERATe|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS5:COMParator:CRITeria
[SELect]?
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria
[:SELect] ERATe|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:MCS9:COMParator:CRITeria
[SELect]?
Pass/Fail Limits
:CALCulate:BERT:BTS:LOOPback:EDGE:ETCH:F43:COMParator:
CRITeria[:SELect] ERATe|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:ETCH:F43:COMParator:
CRITeria[SELect]?
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:
CRITeria[:SELect] EBIT|NOLimit
:CALCulate:BERT:BTS:LOOPback:EDGE:UNCoded:COMParator:
CRITeria[SELect]?
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria
[:SELect] FERasure|CIB|CII|ANY|NOLimit
:CALCulate:BERT:BTS:LOOPback:GSM:COMParator:CRITeria
[:SELect]?
Base Station BERT User’s and Programming Guide
5-7
Softkey/Command Cross-Reference
Key
ESG Family Signal Generators
Option 300 Preliminary Document
SCPI Command
Pass/Fail Off
On
:CALCulate[:Baseband]:BERT:COMParator[:STATe] ON|OFF|1|0
:CALCulate[:Baseband]:BERT:COMParator[:STATe]?
Pass/Fail
Update
:CALCulate[:Baseband]:BERT:COMParator:MODE CEND|FHOLd
:CALCulate[:Baseband]:BERT:COMParator:MODE?
PN9
:SENSe:BERT[:Baseband]:PRBS[:DATA] PN9
:SENSe:BERT[:Baseband]:PRBS[:DATA]?
PN15
:SENSe:BERT[:Baseband]:PRBS[:DATA] PN15
:SENSe:BERT[:Baseband]:PRBS[:DATA]?
Resync Limits
:SENSe:BERT[:Baseband]:RSYNc:THReshold <num>
:SENSe:BERT[:Baseband]:RSYNc:THReshold?
Special Pattern
0’s 1’s
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore
:DATA ALL_0|ALL_1
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore:DATA?
Special Pattern
Ignore Off On
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore[:STATe] ON|
OFF|1|0
:SENSe:BERT[:Baseband]:PRBS:FUNCtion:SPIGnore[:STATe]?
Spectrum Invert
Off On
:SENSe:BERT:BTS:LOOPback:EDGE:SINVert ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:EDGE:SINVert?
:SENSe:BERT:BTS:LOOPback:GSM:SINVert ON|OFF|1|0
:SENSe:BERT:BTS:LOOPback:GSM:SINVert?
Stop
Measurement
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement:STOP
Sync Source
BCH TCH
:SENSe:BERT:BTS:LOOPback:GSM:SYNC[:SOURce] BCH|TCH
:SENSe:BERT:BTS:LOOPback:GSM:SYNC[:SOURce]?
Sync Source
BCH PDCH
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC[:SOURce] BCH|PDCH
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC[:SOURce]?
Synchronize to
BCH/TCH
:SENSe:BERT:BTS:LOOPback:GSM:SYNC:RF
Synchronize to
BCH/PDCH
:SENSe:BERT:BTS:LOOPback:EDGE:SYNC:RF
Target %
:SENSe:BERT:BTS:LOOPback:GSM:ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:ESENsitivity?
5-8
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement:STOP
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Key
Softkey/Command Cross-Reference
SCPI Command
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:
ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:ESENsitivity?
Target BER %
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:
ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:ESENsitivity?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:
ESENsitivity <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:ESENsitivity?
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:
CRITeria[:SELect] EBLock|NONE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS5:STOP:CRITeria[:SELect]?
Threshold # of
Events to Stop
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:
CRITeria[:SELect] EBLock|NONE
:SENSe:BERT:BTS:LOOPback:EDGE:MCS9:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:
CRITeria[:SELect] EBIT|NONE
:SENSe:BERT:BTS:LOOPback:EDGE:UNCoded:STOP:CRITeria[:SELect]?
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria[:SELect] FERasure|
CLIB|CLII|ANY|NONE
:SENSe:BERT:BTS:LOOPback:GSM:STOP:CRITeria?
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement:
TSLot 0|1|2|3|4|5|6|7
:SENSe:BERT:BTS:LOOPback:EDGE:MEASurement:TSLot?
Timeslot #
Total Bit
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement
[:TSLot] <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:MEASurement[:TSLot]?
:SENSe:BERT[:Baseband]:TBITs <num>
:SENSe:BERT[:Baseband]:TBITs?
:SENSe:BERT[:Baseband]:TRIGger[:SOURce] KEY
:SENSe:BERT[:Baseband]:TRIGger[:SOURce]?
Trigger Key
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce] KEY
:SENSe:BERT:BTS:LOOPback:EDGE:TRIGger[:SOURce]?
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce] KEY
:SENSe:BERT:BTS:LOOPback:GSM:TRIGger[:SOURce]?
Uplink Timing
Advance
:SENSe:BERT:BTS:LOOPback:EDGE:ULINk:OFFSet <numeric_value>
:SENSe:BERT:BTS:LOOPback:EDGE:ULINk:OFFSet?
:SENSe:BERT:BTS:LOOPback:GSM:ULINK:OFFSet <numeric_value>
:SENSe:BERT:BTS:LOOPback:GSM:ULINK:OFFSet?
Base Station BERT User’s and Programming Guide
5-9
Softkey/Command Cross-Reference
5-10
ESG Family Signal Generators
Option 300 Preliminary Document
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
6
Theory of Operation
Look in this chapter for in-depth explanations of loopback base station receiver test
functionality.
Base Station BERT User’s and Programming Guide
6-1
Theory of Operation
Synchronization
ESG Family Signal Generators
Option 300 Preliminary Document
Synchronization
Synchronizing the test equipment to the base transceiver station (BTS) is a prerequisite to
the BTS looping back the selected traffic channel (TCH). This can be achieved in two ways:
BCH Sync or TCH Sync.
BCH Sync
The BTS is set to transmit to the test equipment a BCH on timeslot 0 of a
selected absolute radio frequency channel number (ARFCN). The test
equipment uses the BCH signal to determine its required TCH transmit
timing.
On completion, the BTS may be switched into loopback mode on any
selected ARFCN and timeslot number.
TCH Sync
This is a very quick mode of synchronization, but take care initially to set
the receiver to the correct timeslot number being transmitted by the BTS.
In this mode the base station must transmit a signal on the selected
timeslot prior to data being looped back. In some base stations this will
happen as soon as a timeslot is set to loopback, regardless of whether the
signal to the BTS has the correct timing. In other base stations, the BTS
may need to be set to transmit a signal in the selected timeslot prior to
achieving synchronization.
The test equipment can lock to this signal if it contains the correct
midamble. Once synchronized, the test equipment uses this information to
determine the required TCH transmit timing. If the BTS is set accordingly,
any timeslot can be transmitted with the correct timing to enable it to be
looped back by the BTS to the receiver (VSA/ESG).
NOTE
The TCH sync mode relies on the user to set the correct timeslot number into
both ESG transmitter and receiver during synchronization. Thereafter, the
ESG can correctly test any timeslot since its relative timing is defined.
NOTE
This capability can be used to speed up test of consecutive timeslots in
manufacture. TCH sync mode can be used to test all timeslots consecutively
without changing a single setting on the ESG/VSA. All that is required is to
consecutively loopback each timeslot using the BTS MMI and resynchronize
and trigger the ESG.
PN synchronization is also a prerequisite to BER measurements. This is automatic but is
dependent on prior BCH or TCH synchronization.
The pattern to be recognized (PN9 or PN15) is determined by the corresponding transmit
timeslot pattern selection.
6-2
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Theory of Operation
Erased Frame Detection
Erased Frame Detection
When an incorrect CRC in an uplink speech frame is detected by a BTS conforming to the
GSM standards, the BTS substitutes an all-zero speech frame.
In the loopback mode, the BTS transmitter then recodes this substituted zero speech frame
before transmission back to the test equipment receiver (VSA/ESG).
The ESG receiver detects any coded all-zeros speech frames in the returned downlink
signal and increments the (erased) frame event count.
Base Station BERT User’s and Programming Guide
6-3
Theory of Operation
Downlink Errors
ESG Family Signal Generators
Option 300 Preliminary Document
Downlink Errors
The loopback method of measuring BTS receiver BER quality requires a high quality
downlink return path which introduces no errors.
To cater for the situation where the downlink path is faulty, the VSA/ESG provides a
measure of downlink quality based on TCH payload errors detected by convolutional
decoding of the return path. This records errors introduced into the TCH between the
downlink coding (BTS transmitter) and decoding (VSA/ESG) processes and should
normally be zero. For any payload errors detected during a measurement, the
measurement is extended by a speech frame for every downlink error detected.
If a downlink problem results in errors introduced into the downlink midamble, the
measurement aborts, providing further security against downlink problems.
6-4
Base Station BERT User’s and Programming Guide
ESG Family Signal Generators
Option 300 Preliminary Document
Theory of Operation
Frame Structure
Frame Structure
GSM Frame Structure
26-frame TCH multiframe structure.
Frames: Frame 12 (SACCH) and frame 25 (idle) empty.
Identical repetitive frames. Content as per ESG GSM capability.
GSM Received Data
The Table 6-1 shows the minimum requirements for the GSM received data frame
structure during synchronization to the BTS and during measurements.
Table 6-1 GSM Received Data
During BCH Synchronization
TS0
51-frame BCH Multiframe Structure
SCH in frames 1, 11, 21, 31, 41
TS1-7
No SCH, but otherwise, don’t care
During TCH Synchronization
TSX
26-frame TCH Multiframe Structure
Frame 25 idle
Frame 12 don’t care
Other frames TCH
During Measurements
Timeslot under test
26-frame full-rate voice TCH Multiframe Structure
TCH
Frames 0-11, 13-24
Content determined by transmitted signal (looped by BTS except
for errored speech frames, i.e. speech frames with bad CRC)
Frames 12, 25
Don’t care
GSM Transmit Data
The minimum GSM transmit data requirements for the loopback test are a fully
GSM-coded 26-channel multiframe with either PN9 or PN15 in the payload. This is
selected on the ESG by setting the timeslot under test to normal and selecting the PN9 or
PN15 multiframe PN pattern.
To meet the GSM standards requirements for full conformance, the adjacent timeslots
should be loaded with fully GSM-coded data. The ESG offers full flexibility of loading all
timeslots.
Base Station BERT User’s and Programming Guide
6-5
Theory of Operation
Frame Structure
ESG Family Signal Generators
Option 300 Preliminary Document
Edge Frame Structure
52-frame PDCH multiframe structure.
Frames: 12 blocks of 4 frames, 2 idle frames, and 2 frames used for the PTCCH.
6-6
Base Station BERT User’s and Programming Guide
Index
A
Adjust Gain softkey, 3-3
amplitude sensitivity search, 2-11
Arm Sensitivity Search softkey, 3-3
B
BCH synchronization, 2-7
BER connectors
BER CLK IN, 3-38
BER DATA IN, 3-38
BER ERR OUT, 3-39
BER GATE IN, 3-38
BER MEAS END, 3-38
BER NO DATA, 3-39
BER SYNC LOSS, 3-39
BER TEST OUT, 3-39
BER% Mode Off On softkey, 3-4
BER% Uncoded Configure softkey, 3-3
BERT softkey, 3-4
BERT softkeys
Baseband BERT, 3-3
BERT Off On, 3-4
BERT Resync Off On, 3-4
BERT Trigger, 3-4
Trigger Source, 3-5
BERT Trigger Source
SCPI command, 5-2
Bit Count
SCPI command, 4-7
Bit Count softkey, 3-5
Bit Delay Off On softkey, 3-5
BLER% Configure softkey, 3-6
BLER% MCS5 Configure softkey, 3-5
BLER% MCS9 Configure softkey, 3-6
Block Count softkey, 3-6
Block Erasure softkey, 3-6
BTS BERT EDGE Loopback softkey, 3-7
BTS BERT GSM Loopback softkey, 3-7
Bus
SCPI command, 5-2
Bus softkey, 3-7
C
Channel Band softkey, 3-7
Channel Number softkey, 3-8
Class Ib Bit Error
SCPI command, 5-3
Index
Class Ib Bit Error softkey, 3-8
Class Ib RBER
SCPI command, 5-3
Class Ib RBER softkey, 3-8
Class II Bit Error
SCPI command, 5-3
Class II Bit Error softkey, 3-9
Class II RBER
SCPI command, 5-3
Class II RBER softkey, 3-9
Clock Gate Off On softkey, 3-9
Clock Gate Polarity Neg Pos softkey, 3-9
Clock Polarity Neg Pos softkey, 3-10
Configure BER% softkey, 3-10
Configure BERT softkey, 3-10
Configure Measurement softkey, 3-10
Configure Sensitivity Search softkey, 3-10
Configure Triggers softkey, 3-11
connecting the test equipment, 2-3
connectors
BER CLK IN, 3-38
BER DATA IN, 3-38
BER ERR OUT, 3-39
BER GATE IN, 3-38
BER MEAS END, 3-38
BER NO DATA, 3-39
BER SYNC LOSS, 3-39
BER TEST OUT, 3-39
Cycle Count softkey, 3-11
Cycle End softkey, 3-11
D
Data Polarity Neg Pos softkey, 3-12
Data softkey, 3-11
Delayed Bits softkey, 3-12
display annotation, 3-35
Display BER % Exp softkey, 3-12
Display Update Cycle End Cont softkey, 3-12
downlink errors, 6-4
Downlink MCS-1 softkey, 3-13
Downlink MCS-5, 3-13, 3-33
Downlink MCS-5 softkey, 3-13
Downlink MCS-9 softkey, 3-13
E
EDGE BERT Off On softkey, 3-13
EDGE frame structure, 6-6
I-1
Index
equipment setup, 2-3
erased frame detection, 6-3
Error Count softkey, 3-14
Error Rate softkey, 3-14
ESG
configuring GSM mode, 2-4
ESG-D series required options, 2-2
E-TCH/F43.2 softkey, 3-14
Exceeds Any Limits
SCPI command, 5-4
Exceeds Any Limits softkey, 3-14
Exceeds Any Threshold
SCPI command, 5-4
Exceeds Any Threshold softkey, 3-15
Ext
SCPI command, 5-4
Ext Frame Trigger Delay softkey, 3-15
Ext Frame Trigger Polarity Neg Pos softkey, 3-15
Ext softkey, 3-15
external frame trigger, 2-13
adjusting delay, 2-14
measuring delay, 2-13
F
Fail Hold softkey, 3-15
Frame Count
SCPI command, 5-4
Frame Count softkey, 3-16
Frame Erasure Ratio
SCPI command, 5-5
Frame Erasure Ratio softkey, 3-17
Frame Erasure softkey, 3-16
Frame Repeat Single Cont softkey, 3-17
frame structure, 6-5
Frame Trigger Source BCH PDCH softkey, 3-18
Frame Trigger Source Int Ext softkey, 3-18
Freq Channel softkeys
GSM 850 Base, 3-20
Freq Channels Off On softkey, 3-19
Freq Channels softkey, 3-19
Freq Channels softkeys
GSM 450/850 Base, 3-19, 3-20
GSM 450/850 Mobile, 3-19, 3-20
GSM 480 Mobile, 3-20
GSM 850 Mobile, 3-21
GSM BERT Off On softkey, 3-21
GSM frame structure, 6-5
GSM mode
configuring the ESG, 2-4
configuring the VSA, 2-3
GSM/EDGE base station test softkeys, 3-2
H
High Amplitude
SCPI command, 5-5
High Amplitude softkey, 3-21
I
Immediate
SCPI command, 5-5
Immediate softkey, 3-22
Impedance 75 Ohm TTL softkey, 3-22
Initial Bit Count softkey, 3-22
Initial Block Count softkey, 3-22
L
loopback BER
measuring, 2-9
Low Amplitude
SCPI command, 5-6
Low Amplitude softkey, 3-23
M
Max. Data Rate 2Mbps 10Mbps softkey, 3-23
Measurement Mode BER% Search
SCPI command, 5-6
Measurement Mode BER% Search softkey, 3-23
measuring RF loopback BER, 2-2
Mode hardkey, 3-2
Multiframe Channel softkey, 3-24
N
No Limits
SCPI command, 5-6
No Limits softkey, 3-24
No Thresholds
SCPI command, 5-7
No Thresholds softkey, 3-24
G
O
GSM BERT Off On
SCPI command, 5-5
Option 300 overview, 1-2
overview, 1-2
I-2
Index
Index
P
Pass Amplitude
SCPI command, 5-7
Pass Amplitude softkey, 3-25, 3-26
Pass/Fail Limits
SCPI command, 5-7
Pass/Fail Limits softkey, 3-26
Pass/Fail Off On softkey, 3-26
Pass/Fail Update softkey, 3-27
PN15 softkey, 3-25
PN9 softkey, 3-25
product overview, 1-2
programming commands, 4-1
R
rear panel overview, 3-38
remote commands, 4-1
required equipment, 2-2
Restore EDGE Factory Default softkey, 3-27
Restore GSM Factory Default softkey, 3-27
Resync Limits softkey, 3-27
RF loopback BER measurement, 2-2
S
SCPI commands, 4-1
BER clock gate polarity, 4-2
BER clock gate state, 4-2
BER clock polarity, 4-2
BER cycle count, 4-2
BER data pattern, 4-3
BER data polarity, 4-3
BER display mode, 4-3
BER display update mode, 4-3
BER input impedance, 4-3
BER maximum data rate, 4-4
BER measurement result query, 4-4
BER pass/fail judgement mode, 4-5
BER pass/fail limits, 4-5
BER pass/fail state, 4-5
BER resync limits, 4-5
BER resynchronization state, 4-6
BER special pattern ignore data, 4-6
BER special pattern ignore state, 4-6
BER total bits, 4-6
BER trigger
bit delay state, 4-7
BER trigger bit delay, 4-6
BER trigger source, 4-7
BERT State, 4-7
Index
SCPI commands (Continued)
BERT trigger source selection, 4-7
bit count, 4-8
BLER measurement, 4-8, 4-9
block count, 4-9
class Ib bits, 4-9
class II bits, 4-9
data, 4-9
external frame trigger delay, 4-12
external frame trigger polarity, 4-12
frame count DER %, 4-12
frame synchronization source, 4-12
frame trigger source, 4-12
loopback operating state, 4-13
measurement mode switching, 4-14
measurement sensitivity, 4-14
measurement stopping, 4-15
pass/fail limit
class Ib RBER, 4-16
class II RBER, 4-16
frame erasure ratio, 4-16
selection, 4-17
sensitivity search
bit count, 4-18
frame count, 4-18
high amplitude, 4-20
initial bit count, 4-18
initial block count, 4-19
initial frame count, 4-19
low amplitude, 4-20
pass amplitude, 4-21
target error level, 4-19
spectrum invert, 4-21, 4-22
stop measurement threshold criteria
class Ib, 4-25
class II, 4-25
frame erasure, 4-25
number of events, 4-25
sync signal adjustment, 4-27
sync source, 4-27
synchronizing, 4-27
timeslot selection, 4-28
uplink timing advance, 4-29
Search DL MCS5 Configure softkey, 3-28
Search DL MCS9 Configure softkey, 3-28
Search Uncoded Configure softkey, 3-28
Sensitivity Search Configure softkey, 3-28
setup, equipment required, 2-2
softkey descriptions, 3-1
softkeys
Adjust Gain, 3-3
Arm Sensitivity Search, 3-3
Baseband BERT, 3-3
I-3
Index
softkeys (Continued)
BER% Mode Off On, 3-4
BER% Uncoded Configure, 3-3
BERT, 3-4
BERT Off On, 3-4
BERT Resync Off On, 3-4
BERT Trigger, 3-4
BERT Trigger Source, 3-5
Bit Count, 3-5
Bit Delay Off On, 3-5
BLER% Configure, 3-6
BLER% MCS5 Configure, 3-5
BLER% MCS9 Configure, 3-6
Block Count, 3-6
Block Erasure, 3-6
BTS BERT EDGE Loopback, 3-7
BTS BERT GSM Loopback, 3-7
Bus, 3-7
Channel Band, 3-7
Channel Number, 3-8
Class ib Bit Error, 3-8
Class ib RBER, 3-8
Class II Bit Error, 3-9
Class II RBER, 3-9
Clock Gate Off On, 3-9
Clock Gate Polarity Neg Pos, 3-9
Clock Polarity Neg Pos, 3-10
Configure BER%, 3-10
Configure BERT, 3-10
Configure Measurement, 3-10
Configure Sensitivity Search, 3-10
Configure Triggers, 3-11
Cycle Count, 3-11
Cycle End, 3-11
Data, 3-11
Data Polarity Neg Pos, 3-12
Delayed Bits, 3-12
Display BER% Exp, 3-12
Display Update Cycle End Cont, 3-12
Downlink MCS-1, 3-13
Downlink MCS-5, 3-13
Downlink MCS-9, 3-13
EDGE BERT Off On, 3-13
Error Count, 3-14
Error Rate, 3-14
E-TCH/F43.2, 3-14
Exceeds Any Limits, 3-14
Exceeds Any Threshold, 3-15
Ext, 3-15
Ext Frame Trigger Delay, 3-15
Ext Frame Trigger Polarity Neg Pos, 3-15
Fail Hold, 3-15
I-4
softkeys (Continued)
Frame Count, 3-16
Frame Erasure, 3-16
Frame Erasure Ratio, 3-17
Frame Repeat Single Cont, 3-17
Frame Trigger Source BCH PDCH, 3-18
Frame Trigger Source Int Ext, 3-18
Freq Channels, 3-19
Freq Channels Off On, 3-19
GSM 450 Base, 3-19
GSM 450 Mobile, 3-19
GSM 450/850 Base, 3-20
GSM 450/850 Mobile, 3-20
GSM 480 Mobile, 3-20
GSM 850 Base, 3-20
GSM 850 Mobile, 3-21
GSM BERT Off On, 3-21
High Amplitude, 3-21
Immediate, 3-22
Impedance 75 Ohm TTL, 3-22
Initial Bit Count, 3-22
Initial Block Count, 3-22
Low Amplitude, 3-23
Max. Data Rate 2Mbps 10Mbps, 3-23
Measurement Mode BER% Search, 3-23
Measurement Mode BLER% Search, 3-23
Multiframe Channel, 3-24
No Limits, 3-24
No Thresholds, 3-24
Pass Amplitude, 3-25, 3-26
Pass/Fail Limits, 3-26
Pass/Fail Off On, 3-26
Pass/Fail Update, 3-27
PN15, 3-25
PN9, 3-25
Restore EDGE Factory Default, 3-27
Restore GSM Factory Default, 3-27
Resync Limits, 3-27
Search DL MCS5 Configure, 3-28
Search DL MCS9 Configure, 3-28
Search Uncoded Configure, 3-28
Sensitivity Search Configure, 3-28
Special Pattern Ignore Off On, 3-29
Special Pattern O’s 1’s, 3-28
Spectrum Invert Off On, 3-29
Stop Measurement, 3-29
Stop Sensitivity Search, 3-29
Sync Source BCH TCH, 3-30
Synchronize to BCH/PDCH, 3-30
Synchronize to BCH/TCH, 3-30
Target BER %, 3-31
Target BLER %, 3-31
Index
Index
softkeys (Continued)
Target%, 3-30
TCH/FS, 3-31
Threshold # of Events to Stop, 3-31
Timeslot #, 3-32
Total Bits, 3-32
Transmit Settings, 3-32
Trigger Key, 3-32
Uncoded, 3-33
Uplink MCS-1, 3-33
Uplink MCS-5, 3-33
Uplink MCS-9, 3-33
Uplink Timing Advance, 3-34
Special Pattern 0’s 1’s softkey, 3-28
Special Pattern Ignore Off On softkey, 3-29
Spectrum Invert Off On
SCPI command, 5-8
Spectrum Invert Off On softkey, 3-29
STATus subsystem
standard operation status group
enable, 4-24
event register query, 4-24
negative transition filter register enable, 4-24
STATus subsystem, data questionable
BERT status group
condition register query, 4-22
enable, 4-22
event register query, 4-23
negative transition filter register enable, 4-22
positive transition filter register enable, 4-22
condition pos. transition filter register enable, 4-23
condition query, 4-23
status group
enable, 4-23
event register query, 4-24
negative transition filter register enable, 4-23
STATus subsystem, standard operation status
group condition register query, 4-24
group positive transition filter register enable, 4-24
Stop Measurement
SCPI command, 5-8
Stop Measurement softkey, 3-29
Stop Sensitivity Search softkey, 3-29
Sync Source BCH TCH
SCPI command, 5-8
Sync Source BCH TCH softkey, 3-30
synchronization, 6-2
Synchronize to BCH/PDCH softkey, 3-30
Synchronize to BCH/TCH
SCPI command, 5-8
Synchronize to BCH/TCH softkey, 3-30
Index
synchronizing
BCH, 2-7
TCH, 2-8
T
Target %
SCPI command, 5-8, 5-9
Target BER % softkey, 3-31
Target BLER % softkey, 3-31
Target% softkey, 3-30
TCH sync lock, 2-8
TCH synchronization, 2-8
TCH/FS softkey, 3-31
test equipment setup, 2-3
theory of operation, 6-1
Threshold # of Events to Stop
SCPI command, 5-9
Threshold # of Events to Stop softkey, 3-31
Timeslot #
SCPI command, 5-9
Timeslot # softkey, 3-32
Total Bits softkey, 3-32
Transmit Settings softkey, 3-32
Trigger Key
SCPI command, 5-9
Trigger Key softkey, 3-32
U
Uncoded softkey, 3-33
Uplink MCS-1 softkey, 3-33
Uplink MCS-5 softkey, 3-33
Uplink MCS-9 softkey, 3-33
Uplink Timing Advance
SCPI command, 5-9
Uplink Timing Advance softkey, 3-34
V
VSA
configuring GSM mode, 2-3
VSA required options, 2-2
I-5
Index
I-6
Index