User Manual - Digital Horizon

User Manual - Digital Horizon
DTMB Modulator
Model: Alto-GAF
User Manual
Alto-GAF
1.6
User Manual
Standard
Chinese
GB 20600-2006
Standard
EN 50083-2
EN 61000-3-2/-3
EN 61000-4-2/-3/-4/-6
Part 15B
Contact Us:
Digital Horizon
Tel˖(+8610) 62614285/86 ext 803
Fax: (+8610) 82551097
E-mail: Support@dh-tv.com
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Notice
This document is Digital Horizon’s property and may not be reproduced and
diffused without the prior permission of the company.
Digital Horizon shall have no liability or responsibility to customer or any other
person or entity with respect to any loss or damage caused or alleged to be
caused directly or indirectly by equipment sold or furnished by us.
Tenor, Soprano, Alto, Concerto, Opera, Orchestra
and
Symphony
are
trademarks of Digital Horizon.
The information contained in this document is subject to change without
notification.
Revision history
Version
Date
Reason for change
1.0
2006.02
Initial Version
1.1
2006.12
Second Version
1.2
2007.04
Third Version, add exciter
1.3
2008.11
Add SIP and Alarm
1.4
2008.12
Remote Control Software
1.5
2009.02
add alarms menu
1.6
2009.09
Add Save/Load Config menu
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Table of Content
1 SAFETY PROTECTION ......................................................................................................... 7
2 INTRODUCTION .................................................................................................................. 10
2.1 Product Family .................................................................................................................. 10
2.2 Overview ........................................................................................................................... 11
3 TECHNICAL SPECIFICATION ............................................................................................ 14
4 INSTALLATION .................................................................................................................... 17
4.1 Front Panel ........................................................................................................................ 17
4.2 Rear Panel ......................................................................................................................... 18
4.3 RS-232 Control Port.......................................................................................................... 19
4.4 LCD Display ..................................................................................................................... 20
4.5 Contact Relay .................................................................................................................... 21
5 OPERATION ......................................................................................................................... 22
5.1 Power On........................................................................................................................... 22
5.2 STATUS menu .................................................................................................................. 23
5.3 Main Menu ........................................................................................................................ 24
5.4 Sub Menu SYSTEM ......................................................................................................... 25
5.5 TS INPUT ......................................................................................................................... 31
5.6 Sub Menu MODULATION............................................................................................... 32
5.7 Sub Menu RF OUTPUT.................................................................................................... 36
5.8 Sub Menu PRE CORRECTION ....................................................................................... 40
5.9 Sub Menu NETWORK ..................................................................................................... 46
5.10 Sub Menu CLOCK REF ................................................................................................. 50
5.11 Sub Menu SUPERVISION .............................................................................................. 52
6 REMOTE CONTROL ........................................................................................................... 53
6. 1 Excel Control Software .................................................................................................... 53
6. 2 TuneCast Software ........................................................................................................... 54
7 FIRMWARE UPDATE........................................................................................................... 63
8 TROUBLE SHOOTING ........................................................................................................ 69
9 REPAIR AND MAINTENANCE ............................................................................................ 71
ANNEX ĉ: AVAILABLE BIT RATE FOR 8MHz .................................................................... 72
ANNEX Ċ: MENU STRUCTURE........................................................................................... 76
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List of Figure
Figure 1: Block Diagram of Alto-GAF ................................................................................... 11
Figure 2: Modulator Front Panel ............................................................................................. 17
Figure 3: Modulator Rear Panel .............................................................................................. 18
Figure 4: RS-232 Connector Definition .................................................................................. 19
Figure 6: Navigation Keys on Front Panel .............................................................................. 20
Figure 5: Magnitude/Frequency Response .............................................................................. 41
Figure 6: Magnitude/Frequency Linear Pre-correction Curve ................................................41
Figure 7: Group Delay/Frequency Response .......................................................................... 42
Figure 8: Group Delay/Frequency Linear Pre-correction Curve.............................................42
Figure 9: Linear Pre-correction Software TuneCast................................................................ 43
Figure 10: Non-linear Curve of Amplifier .............................................................................. 43
Figure 11: Spectrum Shoulder................................................................................................. 44
Figure 12: User Interface of Non-linear Pre-correction .......................................................... 45
Figure 13: MFN Architecture .................................................................................................. 46
Figure 14: SFN Architecture ................................................................................................... 47
Figure 15: Excel Control Software Start Up ........................................................................... 53
Figure 16: Excel Control Software.......................................................................................... 54
Figure 17: TuneCast Installation Menu 1 ................................................................................ 55
Figure 18: TuneCast Installation Menu 2 ................................................................................ 55
Figure 19: TuneCast Installation Menu 3 ................................................................................ 56
Figure 20: TuneCast Installation Menu 4 ................................................................................ 57
Figure 21: TuneCast Installation Menu 5 ................................................................................ 57
Figure 22: RS-232 Connection Failure ................................................................................... 58
Figure 23: RS-232 Connection Success .................................................................................. 59
Figure 24: Linear Pre-correction Interface .............................................................................. 60
Figure 25: Non Linear Pre-correction Interface ...................................................................... 61
Figure 26: Maintenance Interface ........................................................................................... 62
Figure 27: Configure Parameters ............................................................................................ 64
Figure 28: Status Information ................................................................................................. 65
Figure 29: Check Null Information ......................................................................................... 65
Figure 30: The Process of Reading ......................................................................................... 66
Figure 31: Read Finish ............................................................................................................ 66
Figure 32: Erase Finish ........................................................................................................... 67
Figure 33: Open a *. BIN File ................................................................................................. 67
Figure 34: The Process of Writing .......................................................................................... 68
Figure 35: Finish the Writing .................................................................................................. 68
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List of Table
Table 1: TS Input Description ................................................................................................. 14
Table 2: Modulation Description............................................................................................. 14
Table 3: Clock Reference Description..................................................................................... 16
Table 4: RF Output Description .............................................................................................. 14
Table 5: Linear Pre-correction Description ............................................................................. 15
Table 6: No-Linear Pre-correction Description ....................................................................... 15
Table 7: Test Signal Description ............................................................................................. 15
Table 8: DTMB Network Description ..................................................................................... 15
Table 9: Configuration & Supervision Description ................................................................. 16
Table 10: Physical Parameter Description............................................................................... 16
Table 11: Front Panel Description ........................................................................................... 17
Table 12: Rear Panel Description ............................................................................................ 18
Table 13: Contact Relay Pin Description ................................................ 䭉䈟ʽᵚᇊѹҖㆮDŽ
Table 14: Modulator STATUS Parameter................................................................................ 23
Table 15: Modulator Alarm List .............................................................................................. 26
Table 16: Modulator Factory Default Parameters ................................................................... 28
Table 17: SIP Option Field ...................................................................................................... 48
Table 18: Sub Menu SUPERVISION ...................................................................................... 52
Table 19: Trouble Shooting Description ................................................................................. 69
Table 20: Available Bit Rate for 8MHz DTMB ...................................................................... 72
Table 21: Menu Structure Description .................................................................................... 76
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1 SAFETY PROTECTION
The DTMB Modulator conforms to the safety information contained in the International
Electro-technical Commission (IEC) publication 60215 (1987-06) (www.iec.ch). The design
and manufacturing approach of the modulator will protect the operator from dangerous
voltages, heat, radiation, and other hazards if operated per specification. Digital Horizon has
attached warning labels (when applicable) to the enclosures and/or various assemblies to
identify potentially dangerous conditions to the operator. Operators must adhere to these
Warning labels.
Digital Horizon recommends that only “skilled” personnel, as defined by the IEC 60215
publication, be permitted to operate the modulator.
Proper training and correct
equipment-operation will remove the risk of hazardous conditions and dangers to the
operator.
Warnings, Cautions, and Notes
This manual contains WARNING and CAUTION notices that identify procedures, conditions,
and materials that could potentially cause death, injury or damage to equipment.
i A WARNING notice will appear before a procedure or instruction if injury or death could
result from performing the procedure or instruction incorrectly.
i A CAUTION notice will appear before a procedure or instruction if equipment damage
could occur from performing the procedure or instruction incorrectly.
i A NOTE appears after a paragraph to highlight important information or procedures.
WARNING
This equipment uses dangerous voltages that can cause injury or
death. Observe applicable safety precautions.
CAUTION
Do not operate the modulator with load disconnected. Doing so
may damage the equipment.
Warnings and Cautions
Assemblies within the transmitter system that contain high voltage conditions have safety
symbols attached to them.
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HIGH VOLTAGE
This symbol identifies the presence of high voltage that can cause injury or death.
Electrical Shock and the Human Body
Electrical shock or electrocution occurs when the body becomes part of an energized
electrical path and this electrical energy passes through the body.
The body subjected to a difference of potential, or stored electrical charge causing current to
flow through the body, will be shocked or electrocuted. Effects of electrical shock may include
severe burns to the skin and/or internal organs and respiratory or cardiac arrest. Any
electrical current that flows through the central nervous system of the human body has the
potential to cause serious injury or death.
Severity of electrical shock depends upon the source and duration of exposure. Use the
following information in conjunction with a vigilant and on-going safety program. This
information is in general terms and does not include unknown variables that may increase
susceptibility to electrical shock. Always exercise Awareness and Caution.
Direct Current (DC): Low voltage (up to 72 VDC) usually does not present a hazard to human
life, but a severe burn is possible under some conditions. Medium and high voltage (greater
than 72 VDC) can cause severe shocks, burns, and even death.
Alternating Current (AC): At commercial frequencies (50-60 Hz) and intermediate voltages
(72 to 600 VAC), lethal current can flow through the body. Even low AC voltages (24 VAC or
less) under certain circumstances can be dangerous and lethal. The danger of shock is less
at high frequencies, but radio-frequency (RF) burns are possible.
Body Resistance: The resistance of the body and the amount of insulation between the
body and electrical earth-ground determine the amount of electrical current that passes
through the body. The skin presents the greatest resistance of the human body to impede
current flow. Please note that skin resistance decreases with increased voltage.
Time of Contact: The length of time the body remains in contact with electrical current
determines the severity of possible injury. Burns break down the skin and thus lower the
body’s ability to resist electrical current. The more extensive the burn, the less resistance the
skin provides. As current flow increases, so does the severity of the shock. The duration of
contact is critical. As current flows through the body, this causes loss of muscle control, chest
contractions (breathing is impaired) and ventricular fibrillation of the heart. During fibrillation,
the heart cannot pump sufficient quantities of blood.
Magnitude: The magnitude of the electrical current determines the extent of muscle-control
loss, effects on the heart, and severity of burns.
Path: The path of the electrical current through the body is critical. When current passes
from hand to hand, or hand to foot, the brain, heart, lungs, and spinal cord, which become
part of the electrical path, are affected.
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Age and Condition of Victim: The age and physical condition of the victim affects the
severity of electrical shock. Elderly victims, young children, or those with existing medical
conditions, are more susceptible to injury caused by electrical shock.
Emergency Procedures for Electrical Shock
Anyone engaged in electrical or electronic work should be aware of the proper safeguards
and emergency procedures related to hazardous electrical conditions. An understanding and
knowledgebase regarding electrical hazards will reduce the risks and dangers of
electrocution. Obtaining safety related training courses such as First Aid and CPR, and
applying them during emergencies, might greatly reduce the effects of electrically induced
injuries.
Promptly report to the appropriate personnel, any electrical “popping” or sparking, and any
noticeable defects or hazardous conditions that can cause injury, property damage, or
interference to the electrical equipment
Immediately report any electric shock received to the appropriate supervisor or safety
personnel.
In the event that an individual comes into contact with a live electrical circuit:
i Cut off the power. Learn how to remove power anywhere within the work area.
i Free a victim from a live circuit. If a person is “frozen” to a live electrical contact, turn off
the power if possible. If you cannot turn off power, use wooden boards, poles, sticks, a
belt, dry rope, articles of clothing or some other nonconductive material of sufficient
strength to pull the affected person from electrical contact.
i Contact emergency personnel. Immediately contact emergency medical personnel.
Only qualified and trained personnel should perform First Aid procedures.
WARNING
Under no circumstances, touch a victim exposed to a live circuit.
Doing so will place you in the live circuit, and may result in injury or
death due to electrocution.
WARNING
Use appropriate practices when working near high voltage. The
removal of panels identified with warning symbols can expose the
mains voltages. These voltages can cause injury or death.
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2 INTRODUCTION
2.1 Product Family
Digital Horizon has developed a full range of terrestrial TV product family. It covers
world wide terrestrial TV standards like DVB-T (H), DAB/T-DMB, DTMB, Media Flo
modulator,
demodulator
with
MIP inserter,
UHF/VHF
transmitter,
MMDS
transmitters, Gap filler and classified as:
Tenor-GAF: Broadcast DVB-T(H) modulator
Tenor-GAT2: Cost effective Dual Channel DVB-T(H) modulator
Tenor-DEM : DVB-T(H) professional demodulator
Tenor-MIP: DVB-T/ DTMB Dual mode MIP inserter
Alto-GAF: Broadcast DTMB modulator(Chinese standard)
Cello-GAF: Broadcast Mobile TV CMMB modulator
Bass-GAF: Broadcast DAB/T-DMB modulator
Solo-GAF: Broadcast ATSC modulator (USA standard)
Bossa-GAF:Broadcast ISDB-T/T B modulator (Japan and Brazil standard)
Concerto: MMDS Transmitter
Opera: UHF/VHF Gap Filler
Symphony: UHF/VHF Transmitter
Orchestra: Terrestrial TV Network Management System
Flute: 1+1 RF switch
Delta: GPS Receiver
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2.2 Overview
Figure 1: Block Diagram of Alto-GAF
Digital Horizon’s Chinese standard modulator exciter Alto-GAF is designed for
transmitter manufacturer and TV broadcaster with full DTMB features.
As shown in the Figure 1, Alto-GAF can provide 2 ASI inputs. The ASI inputs in each
pairs can be configured as automatic switching redundant mode or manual
selection mode. Alto-GAF supports all DTMB modes defined in the GB 20600-2006
standard, including 6MHz, 7MHz, 8MHz bandwidths, SFN & MFN, linear and non
linear pre-correction. The equipment can provide an RF output covering the whole
VHF and UHF bands. An optional ultra linear amplifier can be added to increase the
RF output level to 15-25dBm.
The equipment includes a high stability internal clock reference based on a 10MHz
TCXO. In case of SFN a better clock reference is required, an external 10MHz
reference can be used.
User can use the keypad and LCD on the front panel to set equipment’s parameters.
RS-232 and Ethernet interfaces are provided for remote control use.
Linear and non linear pre-correction is provided as option to TV transmitter
manufacturers.
„ Input Switching
The ASI inputs are compliant with EN 50083-9. 188 and 204 (188+16) packets
format are supported in “Packet mode” or in “Burst mode” as required for DTMB
system.
The modulator performs an automatic input switching from primary ASI input to
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secondary ASI input in case of detected stream failure. This process fulfils TR 101
290 recommendations and implements a basic switching based on one of the
standard First Priority conditions. In case of loss of input synchronization (with TS
stream present), that occurs if more than three consecutive TS_Sync_Loss are
detected, the modulator indicates an input failure and switches automatically from
Primary input to secondary. This feature authorizes to implement redundant
architecture and is in particularly required in case of integration into a dual-drive
transmitter.
„ Bit Rate Adaptation
When operating in MFN, the ASI management unit could performed “Bit rate
adaptation”, if needed. When this mode of operation is activated, the unit discards
or inserts Null packets to adapt the ASI input bit rate to the precise bit rate defined
by the selected DTMB mode.
„ SIP Processing
In SFN operating, the modulator receives and analyses the incoming Second
Frame Initialization Packet (SIP). This is required to align the output modulated
stream in SFN operating. Furthermore, the ASI management unit is able to extract
the SIP control information (Mandatory and/or Mandatory + Optional fields) and to
use them to set up the configuration of the modulator. As for instance, TPS_SIP
field can be used to remote control via the SIP packet the modulation scheme.
Note: Special test modes have been implemented on both the MIP/SIP Inserter and
on the DTMB modulator to ease on-field SFN network set-up and tuning! Such test
modes are based on a communication protocol between the DH units that conveys
messages through the MIP/SIP packets.
„ SFN Operations
When the modulator operates in SFN mode, the external reference signals (10 MHz
and 1 PPS or GPS) should be connected to the modulator. They generally come
from a GPS receiver or form the GPS satellite itself (only for GPS integrated).
Thanks to the SIP synchronization information and to the reference signals, the
modulator performs an automatic time alignment of the ASI inputs, by inserting the
relevant delay.
Moreover than this automatic delay compensation, the modulator is able to insert
the Offset delay that could be set from 0 ms to + 1.677 721 500 s.
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„ Output Signal
The main signal is available on the output called “RF Output”. The centre frequency
of the signal could be set from 30MHz to 900MHz with a step of 1Hz. This centre
frequency value does not depend on the channel bandwidth value.
A copy of this signal is available on the “RF Test”. This output signal is the same as
the main signal (“RF Output”) with a lower level (-20 dB).
The user is able to setup attenuation between 0 and 17 dB per step of 0.1dB. And
the user is able to adjust finely this level by adding an offset gain between -2 dB and
+ 2 dB per step of 0.1 dB.
The output could be muted either by the user or depending on some conditions.
The mute could be direct (abrupt muting) or progressive.
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3 TECHNICAL SPECIFICATION
„ TS Input
Table 1: TS Input
Standard
GB 20600-2006
ASI Number
2 inputs
Packet Size
188/204
Packet Mode
Packet/Burst
Useful Bit Rate
<32.48Mb/s
Redundancy Mode
Auto/ Manual, seamless
TS Processing
PCR re-stamping, SIP extraction and processing
Delay Management
Static delay, Auto delay for SFN
Delay for seamless switching in SFN
SFN Synchronization
Automatic
Connector Type
BNC female, Impedance 75Ohm
„ Modulation
Table 2: Modulation Description
FFT
1 or 3780
FEC
0.4,0.6,0.8
Outer FEC
BDH coding
Guard Interval
1/4(PN945),1/7(PN595),1/9(PN420)
Constellation
4QAM, 4QAM-NR,16QAM, 32QAM, 64QAM
Channel Bandwidth
6MHz, 7MHz, 8MHz
Time Interleaver
240, 720
„ RF Output
Table 3: RF Output
Central Frequency
30-900MHz, step 1Hz
Signal Level (Main)
0dBm +/- 2dB
Signal Level Attenuation
0dB to –17dB adjustable by 0.1dB step
Signal Stability
+/- 0.1dB/10degˈ+/-1kHz
MER
>38dB
Shoulder
>50dB @ +/-4.2 MHz from central frequency
Spurious
>50dB relative to the total power of signal
Spectrum Inversion
YES/NO
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Mute Mode
Direct/Progressive/ASI Error
Output Tilt
+/- 1dB, step 0.1dB
Output Gain Offset
+/- 2dB, Step 0.1dB
Output Monitoring
-20dB to the main output
Return loss
>15dB
Connector Type
N female, Impedance 50 Ohm
„ Linear Pre-correction
Table 4: Linear Pre-correction
8MHz
7MHz
6MHz
Useful Bandwidth
7.61MHz
6.66MHz
5.71MHz
Number of Points
32
32
32
245KHz
215KHz
184KHz
Bandwidth
Frequency Spacing
between 2 Points
„ Non-Linear Pre-correction
Table 5: Non-Linear Pre-correction
Type
Nb of Points
Abscissa
Ordinate
Step
AM/AM
16
-12 dB to +12dB
-6dB to +6dB
0.05dB
AM/PM
16
-12 dB to +12dB
-25° to +25°
0.05dB/0.2°
„ Test Signal
Table 6: Test Signals
PRBS Test Stream
PN 9, PN 15, PN 23
Special Test Mode
SFN Fine Tune
Test Tone
Single Carrier
„ DTMB Network
Table 7: DTMB Network
Single Frequency
Time Offset Range:
Network (SFN)
0ms~1.6777215s, step=100nSec
Multi-Frequency
Static delay=0sec, range: 0~1000ms, step 100nSec
Network (MFN)
SIP Control
Disable/Enable/MIP + Option
Tx ID
Number 001-100
Control Frame
Yes or No
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„ Clock Reference
Table 8: Clock Reference
Stability
0.05ppm(typical)
Aging
3ppm
Output level
0dBm +/- 3dB
External
Input level
-15dBm to +15dBm
10MHz Clock
Input connector type
BNC female, 50Ohm
Input level
TTL level -5 K Ohms
Input minimum pulse width
1us
Input connector type
BNC female
Internal
10MHz Clock
External
1PPS Reference
+/-200ns
SFN Synchrony
Accuracy
„ Configuration & Supervision
Table 9: Configuration & Supervision
Local Control
Front panel LED, LCD, 6 buttons
Remote Control
RS-232 or RJ-45 IP in option
„ Physical Parameter
Table 10: Physical Parameter
Power Supply
AC 220V+/-10%, 50W
Operating Condition
0-50 degrees, humidity 10%-80% at 50 degrees
Storage Conditions
-10 ~ 70 degrees, humidity 10%-80% at 50 degrees
Dimension
Length 540mm, Width 483mm, Height 44mm (1RU)
Weight
8kg
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4 INSTALLATION
4.1 Front Panel
Figure 2: Modulator Front Panel
Table 11: Front Panel Description
Name
Function
There are four LEDs on the front panel:
Power: when turned on, the green LED indicates that power is
available. When turned off, the power is not available or failed
Alarm: this red LED indicates the equipment is in alarm condition.
LEDs
Remote: when green LED is turned on, the instrument is using
remote control mode, when turned off, the equipment is using local
control mode
Temp: this red LED indicates the instrument is too hot and should
be shut down immediately.
LCD Display
Cursor Keys
Display menus and parameters
UP, DOWN, LEFT, RIGHT. Used to navigate through the menu
system
ENTER
Confirm a selection then return to previous menu
EXIT
Exit and return to previous menu
-20dB RF TEST
BNC connector for -20dB RF monitor output
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4.2 Rear Panel
Figure 3: Modulator Rear Panel
Table 12: Rear Panel Description
Name
Function
RS232-1
Sub DB-9 connector for serial RS-232 communication
RS232-2
???
Contact Relay
Sub DB-9 connector for alarm triggers
RJ-45
RJ-45 connector for NMS control
RF Out
N- connector for a RF output
ASI-1 In
BNC connector for main ASI input 1
ASI-2 In
BNC connector for spare ASI input 2
10MHz Out
1PPS In
10MHz In
Power Plug
ON/OFF
BNC connector for an internal frequency reference output of
10MHz
BNC connector for a 1PPS input signal for SFN
SMA connector for an external frequency reference input of
10MHz
To connect to the mains supply
Power on or shut down the equipment
Grounding
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4.3 RS-232 Control Port
As shown in the figure 4, the serial RS-232 port uses Rx, Tx lines and a ground
connection. This RS-232 port is used to connect your PC, there is a special
software for you to control the modulator remotely.
A general setting of the serial RS-232 port is fixed with the following parameters:
z
No Parity bit
z
57600 bauds
z
8 data bits
z
1 STOP bit
Figure 4: RS-232 Connector Definition
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4.4 LCD Display
User can use DOWN, UP, LEFT and RIGHT to move the cursor on one of the menu
item, then use “ENTER” to confirm the selection or use “EXIT” to go back to
previous menu.
Figure 5: Navigation Keys on Front Panel
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4.5 Contact Relay
This connector provides 2 contact relays and 2 TTL signals to trigger external equipment
in case of alarm. The definition of the pins are shown in the table 17.
The relays physical characteristics are:
Switching current: 700mA max
Maximum switching voltage: 48V max
Table 17: Contact Relay Definition
Pins
Description
Alarm Triggers
7
Contact Relay 1 Open
TS Loss
6
Contact Relay 1 Close
1
Contact Relay 1 Common
9
Contact Relay 2 Open
8
Contact Relay 2 Close
4
Contact Relay 2 Common
2
TTL 5V High
Grounding to Reset
3
TTL 5V High
Grounding to Mute
5
Ground
RF Mute
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5 OPERATION
5.1 Power On
Switch on the power after assuming that all connections are correctly settled. The
equipment will check the hardware and software automatically. The welcome menu
will be shown as below, and then the modulator exciter is operational.
Hardware test-------------------------------------------OK
Software test--------------------------------------------OK
DTMB Modulator Alto-GAF
Version B4D2M208
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5.2 STATUS menu
The modulator exciter shows its configuration parameter in STATUS menu. If no
button in front panel is pressed during 15 seconds, the modulator will go to STATUS
menu automatically and display the current parameter setting. If user wants to go to
other menus, just press “ENTER” to go to configuration mode or supervision
mode.
---STATUS-- -----STATUS -------STATUS------STATU
Constellation=64QAM, Time Inter=720 Guard Interval
The content of the STATUS moves from right to left showing the main parameters of
the modulator:
Table 14: Modulator STATUS Parameter
Parameter
Status
Description
TS
NO,YES
TS synchronization
Constell
4QAM, 16QAM, 64QAM,
Modulation
4QAM-NR, 32QAM
Time Inter
240,720
Time Interleaver
Guard Interval
1/4, 1/7,1/9
Carrier number
FEC
2/5, 3/5, 4/5
Forward Error Correction
FFT
1, 3780
Guard Interval
RF Freq
666MHz
RF Frequency
RF LEVEL
-10 dBm
RF Level
BW
6, 7, 8 MHz
Bandwidth
BR Overflow
YES, NO
Bit Rate Overflow
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5.3 Main Menu
Press “ENTER” in front panel to enter in the main menu.
(A) SYSTEM (B)TS INPUT (C)MODULATION
(D)RF OUTPUT (E)PRE CORRECTION
ė
(F)NETWORK (G)CLOCK
(H)SUPERVISION
ė
There are 8 sub menus in the main menu:
˄A˅SYSTEM ˄B˅TS INPUT (C)MODULATION˄D˅RF OUTPUT˄E˅PRE
CORRECTION ˄F˅NETWORK ˄G˅CLOCK REF˄H˅SUPERVISION
In the following chapters, the sub menus will be explained respectively.
The Menu Tree structure is shown in the Annex Ċ of this User Manual.
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5.4 Sub Menu SYSTEM
There are 8 sub menus in the sub menu SYSTEM. Type ENTER from the SYSTEM,
user can see the following:
(A) SYSTEM
(A.3)Reset
(A.1)Alarm
(A.2) Remote Ctrl
(A.4) Test Mode
(A.5)Factory ė
(A.6) RS-232 Rate (A.7) Config (A.8) IP Add
ė
(A.1) Alarm
In the ALARM menu, user can check the alarms happened in the modulator. The
list of the alarm is shown in the table 15. Move the cursor on Alarm, then type
ENTER to go into the menu. When one of the alarms occurred, the Alarm LED on
the front panel turns to RED.
(A.1)Alarm
(A.1.1)Alarm Status (A.1.2)FAN Status
(A.1.1)Alarm ˖ TS Sync=N, TS OverF=N,
10MHz Lost=Y,EXT 10M Lost=*,PLL Lost=*, ė
(A.1.1)1PPS Lost=*, SIP Lost=*, RF Mute=N,
Mute Type: PLL Lost=N, SIP Lost=N
ė
(A.1.1) Mute Type:
User Req=N, Delay=N,LORS=N,SFN Init=N,
ė
(A.1.2) FAN-FL=---, FAN-FR=---, FAN-BL=---,
FAN-BR=---
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Table 15: Modulator Alarm List
Alarm Name
Status
Description
TS Sync
Y/N
TS input synchronization
TS OverF
N/Y
TS input bit rate higher than the allowed
bit rate
10MHz Lost
Y/N
System 10MHz Clock lost
Ext 10M Lost
Y/N
External Clock Lost (only for Ext 10MHz)
PLL Lost
Y/N
Phase Lock Loup Lost(only for Ext
10MHz)
1PPS Lost
Y/N
1pps lost (applicable only for SFN mode)
SIP Lost
Y/N
SIP lost(applicable only for SFN mode)
RF Mute
Y/N
With or without RF output
PLL Lost
Y/N
RF output is muted when PLL is lost
SIP Lost
Y/N
RF output is muted when SIP is lost in
User Req
Y/N
RF output is muted by the user
Delay
Y/N
RF output is muted with a delay time
LORS
Y/N
RF output is muted when the reference
Mute type
clock is lost
SFN Init
Y/N
RF output is muted during the SFN
initialization in SFN mode
(A.2) Remote Ctrl
(A.2)Remote Ctrl
Press Left & Right keys to come back
Type ENTER from the Remote Ctrl menu to go to the Remote Mode of the
modulator. Check on the front panel if the LED Remote is turn on. To come back to
the Local Mode, press LEFT&RIGHT keys simultaneously, then the LED Remote
will be turn off.
(A.3) Reset
This function is used to reset the modulator, but the current parameter settings are
kept. Type ENTER from the RESET menu, user can see the following on the LCD
screen:
(A.3)Reset
(A.3.1)NO
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(A.3)Reset
(A.3.2)Yes Are you sure to reset ?
Type ENTER to reset the modulator, type EXIT to go back to the up upper level
menu.
(A.4) Test Mode
The modulator can generate the internal test signals. Go to the TEST MODE menu.
In (A.4.1), the modulator can generate a PRBS test TS without requiring the input
from ASI. On the RF output of the modulator, a spectrum can be used.
(A.4) Test Mode
(A.4.1) Disable
(A.4) Test Mode
(A.4.2)PRBS=PN23
(A.4) Test Mode
(A.4.3)PRBS=PN15
(A.4) Test Mode
(A.4.4)PRBS=PN9
User can choose one of the 3 modes: Test PRBS=PN23, Test PRBS=PN15, Test
PRBS=PN9.
(A.4) Test Mode
(A.4.5) Test Tone
A signal carrier test tone can be generated in (A.4.5). Scroll between
Disable/Enable to active and des-active this test signal. It is useful to help the user
to test the phase noise of the modulator or show the central frequency of the
modulator.
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Note: Be careful to use the Test Tone Signal when the modulator is connected
to a transmitter. It may damage the final amplifier due to its high peak power.
(A.4) Test Mode
(A.4.6)SFN Fine Tune
A special SFN Fine Tone test signal is provided to help the SFN synchronization
adjustment. It is a DVB-T modulation signal of 8MHz, 8k, FEC=2/3, Guard Interval=
1/4, Constellation=64QAM. This test signal can either be generated by using our
SIP Inserter or by active from the above menu. This test mode is provided to allow
the usage of cost effective DVB-T test instrument.
(A.5) Factory Setting
This menu is used to set back to the modulator’s factory default parameters. This
function is very useful when the user is uncertain the current working configuration
of the modulator. By using the FACTORY SETTING function, the following
parameters are settled:
Table 16: Modulator Factory Default Parameters
TS Input
ASI
Auto Switching
MOD
Constellation
64QAM
Time Inter
720
Guard Interval
1/4
FFT
3780
FEC
4/5
DTMB System Info
DTMB
RF Output
Bandwidth
8MHz
Spectrum inversion
No
RF Freq
666MHz
RF Level
-10.0 dBm
RF Offset Gain
+0.0 dB
Output Mute
No
RF Mute ASI Error
YES
Un Mute Delay
5 Sec
Pre Correction
Non Linear Pre-correction
Off
Linear Pre-correction
Off
Network
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MFN/SFN
MFN
SIP Control
No
Tx-ID
00000
Control Frame Packet
User Manual
No
Clock Ref
1 pps
Rising
10MHz
Internal
LORS
Disable
Type ENTER from the (A.5) FACTORY SETTING menu, user can see the following
on the LCD screen:
(A.5)Factory Setting
(A.5.1) NO
(A.5)Factory Setting
(A.5.2)YES Are you sure?
Type ENTER to make the equipment as the factory setting, type EXIT to go back to
the up level menu.
(A.6) RS-232 Rate
The Modulator is remotely controlled through serial RS-232 port. The serial port
communication rate can be set using the following menus. The default rate is 57600
bauds. The pre correction software uses also the serial port.
(A.6)RS-232 Rate
(A.6.1)19200 Bauds
(A.6)RS-232 Rate
(A.6.2)38400 Bauds
(A.6)RS-232 Rate
(A.6.3)57600 Bauds
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(A.6)RS-232 Rate
(A.6.4)115200 Bauds
(A.6)RS-232 Rate
(A.6.5)9600 Bauds
(A.7) Config
User can save as a CONFIG the working parameters of the modulator, for example:
Frequency, RF Output Level, Guard Interval, etc. Up to 4 working configurations
can be saved, the name of each configuration is fixed as: Config1, Config2,
Config3, and Config4. At the same time, user can load a config that had been
saved ago.
(A.7)Config
(A.7.1)Save Config
(A.7.2)Load Config
(A.7.1)Save Config
Config1 Config2 Config3
Config4
(A.7.2)Load Config
Config1 Config2 Config3
Config4
Move the cursor on one of the Config x and type ENTER, until the message
“Setting is OK” on the LCD screen to make sure the selection.
Use UP or DOWN key to select YES, then type ENTER to make the modulator as
the factory setting, type EXIT to go back to the up level menu.
(A.8) IP Address
(A.8) IP Addr
(A.8.1) IP Addr=192.168.000.231
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5.5 TS INPUT
Under TS INPUT menu, user can select the TS input port. Two ASI inputs are
present on the back panel of the modulator for Alto-GAF . Two ASI inputs can be
used either in AUTO SWITCHING mode, that means the equipment will
automatically detect the TS from ASI-1 or ASI-2, or in MANUAL SWITCHING mode,
that means the use can select ASI-1 or ASI-2 as input manually. If both ASI-1 and
ASI-2 are feed with the TS inputs, the ASI-1 always works as main input.
Type ENTER from the TS INPUT menu, the following message appears on the LCD
screen. User can scroll between ASI-1 IN, ASI-2 IN and Auto Switching and then
make the selection.
(B.1)ASI IN
(B.1.1)Auto Switching
(B.1)ASI IN
(B.1.2)ASI-1
(B.1)ASI IN
(B.1.3)ASI-2
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5.6 Sub Menu MODULATION
This menu allows user to set the modulator’s channel coding parameters such as:
FFT, Constellation, Guard Interval, FEC, etc. These parameters are presented in
the following sub menus. Type ENTER to go into the MOD menu, user can see the
following on the LCD screen:
(C)MOD (C.1) Constell
(C.2)Time Inter
(C.3)Guard Interval (C.4)FFT (C.5)FEC
ė
(C.6) Dual Pilot Tone
(C.7)PN Type
ė
User can go further into each of the sub menus below. Move the cursor on the
respective item, type ENTER to select the item, or type DOWN to go to the next
page, or type EXIT to quit to the previous menu.
(C.1) Constell: set up constellation mode
(C.1)Constellation
(C.1.1) 4QAM
(C.1)Constellation
(C.1.2)4QAM-NR
(C.1)Constellation
(C.1.3)16QAM
(C.1)Constellation
(C.1.4)32QAM
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(C.1)Constellation
(C.1.5)64QAM
(C.2) Time Inter: set up time interleaver depth
(C.2)Time Interleaver
(C.2.1)Depth= 240 symbols
(C.2)Time Interleaver
(C.2.2)Depth= 720 symbols
The time interleaver depth can be set between 240 and 720
(C.3) Guard Interval: set up Guard Interval ?????
(C.3 )Guard Interval
(C.3.1)GI=1/4˄945˅
(C.3.2)GI signal=3dB
(C.3 )Guard Interval
(C.3.2)GI=1/7˄595˅
(C.3.2)GI signal=3dB
(C.3 )Guard Interval
(C.3.3)GI=1/9˄420˅
(C.3.2)GI signal=3dB
The guard interval value can be set amongst 1/4(PN945),1/7(PN595) and
1/9(PN420). Guard Interval Signal Power Boost can be set between 0dB or 3dB.
(C.4) FFT: set up the number of sub carrier
(C.4)FFT
(C.4.1)FFT=1
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(C.4)FFT
(C.4.2)FFT=3780
The number of sub carrier can be set between 1 and 3780
(C.5) FEC: set up FEC code rate
(C.5 )FEC
(C.5.1)FEC=2/5
(C.5 )FEC
(C.5.2)FEC=3/5
(C.5 )FEC
(C.5.3)FEC=4/5
The FEC can be set between 2/5, 3/5 and 4/5.
(C.6)Dual Pilot Tone: set up pilot tone
(C.6 ) Dual Pilot Tone
(C.6.1) Dual Pilot Tone =Disable
(C.6 ) Dual Pilot Tone
(C.6.2) Dual Pilot Tone =Enable
The dual pilot tone can be disabled or enabled.
(C.7)PN: set up PN type
(C.7 ) PN
(C.7.1) PN=Variable PN
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(C.7 ) PN
(C.7.2) PN=Constant PN
The PN type can be selected between constant and variable.
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5.7 Sub Menu RF OUTPUT
This menu is used to set the parameters related to radio frequency output such as
Bandwidth, RF carrier frequency, Spectrum inversion, RF output level and Output
Mute. Type ENTER to go into the RF OUTPUT menu, user can see the following on
the LCD screen:
(D)RF OUTPUT (D.1)RF Freq (D.2)RF Level
(D.3)RF Offset Gain (D.4)Inversion
ė
(D.5)Bandwidth (D.6)RF Out Mute
(D.7)ASI Error Mute (D.8) RF Out Delay
ė
(D.9)PLL Lost Mute (D.10)SIP Rep Mute
(D.11) RF Spectrum Tilt
ė
User can go further into each of the sub menus below. Then move the cursor on the
respective item, type ENTER to select the item, or type EXIT to quit to the previous
menu.
(D.1) RF Freq: set the RF Output frequency
Use the LEFT or RIGHT button to move the cursor onto the right digit you want to
change, then use the UP and DOWN button to scroll the right number until you find
the right RF Output Frequency. The valid range is from30MHz to 900MHz. At the
same time the correspondent channel number can be shown if the frequency is the
same as central frequency of the channel. User can also enter the channel number,
this time the central frequency of the channel will be shown.
(D.1)RF Freq
(D.1.1) Freq=666000.000 kHz
(D.1.2)ch=32
(D.2) RF Level: set the RF Level
Type ENTER to go into the RF LEVEL menu. Use the UP and DOWN button to
increase or decrease the RF output level, then type ENTER to confirm. The valid
range is from –17dBm to 0dBm
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(D.2) RF Level
(D.2.1)RF Level=ˉ00.0dBm
(D.3) RF Offset Gain
RF offset Gain is used to further adjust the RF output level. Its range is between
–2dB to 2dB, with a Step of 0.1dB. The default value is 0.
(D.3) RF Offset Gain
(D.3.1) RF Offset Gain =0.0dB
(D.4)Spectrum Inversion:
(D.4)Spectrum Inversion
(D.4.1)Yes
(D.4)Spectrum Inversion
(D.4.2)NO
(D.5) BW: set up the bandwidth.
(D.5)Bandwidth
(D.5.1) 6MHz
(D.5)Bandwidth
(D.5.2) 7MHz
(D.5)Bandwidth
(D.5.3) 8MHz
(D.6) RF Output Mute
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The modulator RF output can be turned on or turned off by using the RF Mute
function. We can use either Direct Mode or Progressive Mode. It is beneficial for the
user to select progressive mode in case to driver an amplifier.
(D.6) RF Out put Mute
(D.6.1) Mute=NO Mode=Direct
(D.6) RF OutPUT Mute
(D.6.2) Mute=NO Mode=Progressive
(D.6)RF Output Mute
(D.6.3)Mute=Yes
Mode=Direct
(D.6)RF Output Mute
(D.6.4)Mute=Yes
Mode=Progressive
(D.7) ASI Error Mute:
(D.7) RF Output Mute for ASI Error
(D.7.1)NO
(D.7) RF Output Mute for ASI Error
(D.7.2)YES
The modulator can be set to mute the RF output when an error occurs on ASI input.
For example a TS Sync loss
(D.8) RF Out Delay
(D.8)RF Out Delay
(D.8.1) RF Out Delay=005sec
For the application with transmitter, we need to control the RF output starting time of
the modulator.
(D.9) PLL Lost Mute
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(D.9)PLL Lost Mute
(D.9.1)Disabled
(D.9) PLL Lost Mute
(D.9.2)Enabled
The RF output is muted when it detects a lost of PLL in the modulator. It could
happen in the case of SFN when the reference clock is switched from external to
internal.
(D.10) SIP Req Mute
(D.10) SIP Req Mute
(D.10.1)Disabled
(D.10) SIP Req Mute
(D.10.2)Enabled
When SIP request mute is enabled. The modulator’s RF output can be muted via
the control command in the SIP packet.
(D.11) RF Spectrum Tilt: set up RF Spectrum Tilt
(D.10)RF Spectrum Tilt
(D.10.1) RF Spectrum Tilt=0.0dB
When the equipment is located far from the amplifier, for example the outdoor tower
mount amplifier installation, the coaxial cable between the modulator and amplifier
presents more attenuation at high frequency than at lower frequency. The spectrum
roof is higher at left than at right. The spectrum tilt can be used to adjust spectrum
shape from –2dB to +2dB with 0.1dB step. This spectrum shaping improvement
may contribute to the quality of signal.
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5.8 Sub Menu PRE CORRECTION
Pre-correction is used to improve the transmitter performance. It is a complex
process and we have to use a software from PC via RS-232 serial port. Use menu
(E.1) to select the remote RS-232 mode. Then we can launch the pre correction
software from a PC. See next paragraph for details. Once the pre-correction is
finished, press simultaneously LEFT and RIGHT keys to come back to the local
control mode.
(E)PRE CORRECTION (E.1)RS-232 (E.2)Linear
Pre-Correction
(E.3)Non-Linear Pre-Correc
Remote Ctrl
Press Left & Right
Keys
to
come
back
From the front panel, user can enable or disable the linear and non-linear
pre-correction.
(E.2)Linear Pre-correction
(E.2.1)Linear Pre-correction =Disabled
(E.2)Linear Pre-correction
(E.2.2)Linear Pre-correction =Enabled
5.8.1 Linear Pre-Correction
Linear
pre-correction
amplitude/frequency
is
flatness
used
to
and
group
improve
transmitter’s
delay/frequency
spectrum
flatness.
Typical
amplitude/frequency and group delay/frequency curves of a transmitter output filter
are presented in the Figure6 and Figure8.
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Figure 6: Magnitude/Frequency Response
Figure 7: Magnitude/Frequency Linear Pre-correction Curve
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Figure 8: Group Delay/Frequency Response
Figure 8: Group Delay/Frequency Linear Pre-correction Curve
To make the linear pre-correction, select the RS-232 remote mode. Launch
Teamcast Pre correction software TuneCast from a PC. Enter the data in red line
through the TuneCast software to improve the amplitude ripple and group delay
variation.
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Figure 9: Linear Pre-correction Software TuneCast
5.8.2. Non Linear Pre-Correction
For high power transmitters, manufacturer should use class AB amplifiers to
increase the efficiency. The amplifier works in the non linear region of the curve as
the Figure10 below. To keep a good performance of the transmitter, phase and
amplitude non-linearity must be corrected.
Figure 10: Non-linear Curve of Amplifier
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Figure 11: Spectrum Shoulder
In the modulator, user can enter a phase/amplitude non-linearity pre-correction
AM/PM curve and an amplitude/amplitude non-linearity pre-correction AM/AM
curve. They have respectively maximum 16 points and can be edited either through
the front panel or through a Window based software via RS-232. Here we can use
Temcast TuneCsat software as shown in the figure 12. After the pre-correction, the
spectrum shoulder in the figure 11 and RF signal MER will be improved.
Each amplifier’s non-linear characteristics is unknown. So the correction is based
on the trail process. User can input a list of amplitude and phase parameters in the
modulator, then observe the spectrum shoulder on the spectrum analyzer, and the
MER on the DTMB professional demodulator. A lot of trail must be done until the
best spectrum shoulder and MER will be achieved.
From the panel, use can only enable or disable the non linear pre-correction. Type
ENTER to go into the Non-linear Pre-correction menu. An Enabled/Disabled switch
is used to turn on or turn off the non linear pre correction.
(E.3) Non-Linear Pre-correction
(E.3.1) Non-Linear Pre-Correction=Disabled
(E.3) Non-Linear Pre-correction
(E.3.2) Non-Linear Pre-Correction=Enabled
For more details on the utilization of Teamcast TuneCast Software. Please refer to
the relevant user guide from Teamcast.
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Figure 12: User Interface of Non-linear Pre-correction
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5.9 Sub Menu NETWORK
To increase the transmitter coverage to a large area, TV broadcasters have to use
several transmitters working together. These transmitters can work in a Single
Frequency Network (SFN) or in Multi Frequency Network (MFN).
The MFN is similar to the analog TV network, each transmitter covers a limited area
or cell with different frequency. Several frequencies are required to cover a large
area. MFN cannot support the mobile TV service because a subscriber cannot
travel from cell to cell without changing TV channels. User has to re-tune the
terminal to find the new frequency.
Figure 13: MFN Architecture
To save the frequency resource and make the mobile TV subscriber receive the TV
signal seamlessly, broadcaster can build a SFN. All the transmitters in the network
work in the same frequency, transmit the same bit at the same time. In the SFN It is
as if there was a powerful transmitter with a huge antenna covering a large area.
Only one frequency is required.
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Figure 14: SFN Architecture
Alto-GAF modulator can be operated either in MFN or in SFN mode. Go to the
NETWORK menu, we can see following the on the LCD screen. Select SFN or
MFN, then user can go to the different sub menus.
In MFN mode, some parameters of the modulator (transmitter) can be added or
adjusted locally. These parameters are:
z
Bit Rate Adaptation of ASI TS input
z
RF frequency update in the NIT
z
Static Delay of the transmitter
(F.1) SFN/MFN
(F.1)SFN/MFN
(F.1.1)MFN
(F.1.1)Static Delay
(F.1.1.1)Static Delay=0000.0000ms
(F.1) SFN/MFN
(F.1.2)SFN
(F.1.2)SFN Time Offset
(F.1.2)SFN Time Offset=0000.0000ms
In SFN mode, the configuration parameters of each modulator (transmitter) are
centralized from the SIP Inserter at the head end side. The only parameter, which
can be changed, is Time Offset. The setting range is from 0s to 1.6777215s with a
step of 100nSec.
(F.2) SIP Control
(F.2) SIP Control
(F.2.1) SIP Control =NO
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(F.2) SIP CONTROL
(F.2.2) SIP Control =SIP
(F.2)SIP Control
(F.2.3)SIP Control=SIP+Option
SIP is a special data packet with a pre-defined PID=15 in the transport stream. It is
used to send the modulation parameters to the modulator through transport stream.
It is a useful way to manage the modulator remotely, especially in SFN mode. The
parameters sent through SIP are: RF bandwidth, Constellation, FEC, Guard Interval,
Time Interleave, Control Frame. An option field can be added to extent the
modulator control parameters: Time Offset, Frequency Offset, Power Offset, Cell-ID,
Mute. By using TX ID, the parameters in the option field can be sent to individual
modulator. An example of 8 transmitter parameters is shown in the table 17.
Table 17: SIP Option Field
TX
Time Offset
Frequency
Power
Cell ID
Mute
(ms)
Offset(Hz)
Offset(dBm)
1
2ms
1Hz
60dBm
1
OFF
2
3ms
3Hz
60dBm
3
ON
3
5ms
1Hz
45dBm
6
OFF
4
3ms
4Hz
63dBm
23
OFF
5
7ms
6Hz
54dBm
2
OFF
6
9ms
5Hz
50dBm
6
ON
7
10ms
10Hz
58dBm
8
ON
8
20ms
1Hz
62dBm
123
ON
(F.3) Control Frame Packet
(F.3)Control Frame Packet
(F.3.1)Control Frame Packet=NO
(F.3)Control Frame Packet
(F.3.2)Control Frame Packet=YES
(F.4) BR Adaptation
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(F.4)BR Adaptation
(F.4.1)BR Adaptation=YES
(F.4)BR Adaptation
(F.4.2)BR Adaptation=NO
Bit Rate adaptation function is valid only in MFN mode. It is used to adapt the
incoming transport stream bit rate to the bit rate of the modulation mode.
(F.5) TX ID
(F.5)TX ID
TX ID=00003
Transmitter ID must be set so that the modulator can receive the right parameters in
the optional field from SIP. For example, If we set this modulator’s TX ID to 3, the
parameters of the 3rd line in the Table 17 will be received by this modulator.
(F.6) Network Info
(F.6.1) Time Offset =YES, Freq Offset=YES= ,
+000.001HzˈCell ID=YES=0006
ė
(F.6.2)Power Info=YES=45.0dBm,
Network Delay=0.0100ms
ė
This menu is used to supervise the SIP content from the transport stream. It tells us
if the modulator get the Time offset, Frequency offset, Power Info and Cell ID. If yes,
it shows their values.
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5.10 Sub Menu CLOCK REF
This menu describes the selection of the clock reference of the modulator. It can be
either from external or from internal clock reference. GPS is the most used external
clock reference. It can provide a standard 10MHz frequency reference and a
standard 1pps time reference. In a Single Frequency Network (SFN), all the
modulators have to be synchronized to the GPS clock reference. For a stand alone
application, we can use the internal clock in the modulator at a very high stability of
0.5ppm.
Type ENTER to go to CLOCK REF menu, the following content is shown from the
LCD screen:
(G) CLOCK REF
(G.1) 1pps (G.2)10MHz (G.3) LORS
(G.1) 1PPS
(G.1) 1PPS
(G.1.1) Rising
(G.1) 1PPS
(G.1.1) Falling
The 1pps time reference is active only when the modulator is set on SFN mode. In
this case, the pulse triggering can be set to its Rising edge or Falling edge.
(G.2) 10MHz
(G.2) 10MHz
(G.2.1) Internal
(G.2) 10MHz
(G2.2) External
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(G.2) 10MHz
(G2.3) External PPS
Move the cursor on the 10MHz, type ENTER to select INTERNAL, EXTERNAL
clock or clock generation from 1PPS.
(G.3) LORS only in SFN
(G.3) LORS
(G.3.1) LORS=Disable
(G.3) LORS
(G.3.2) Enable LORS Time Out=0200min
LORS means Lost of reference signal. Broadcaster can program a time delay to
mute the RF output when the 10MHz or 1pps is lost.
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5.11 Sub Menu SUPERVISION
In the SUPERVISION menu, all the status, warnings and errors of the modulator
are reported. They are divided into 4 sub menus as follow with a short explanation
in the parenthesis if necessary:
Table 18: Sub Menu SUPERVISION
Menu
General
Status
Menu Item
Values
Description
Serial Number
0001
System serial number
HW Version
0100
Hardware version
SW Version
0110
Software version
Module Type
0200 2030
Modulation module type
ASI Input sync
N/Y
TS input synchronization
PCR Error
N/Y
No PCR detected over 10
seconds or PCR interval
error
GPS
Maintenance
Optional GPS receiver status
HW/SW No Comp
Yes/No
Hardware and software are
not compatible
Failure Inter Com
Yes/No
Failure
in
internal
communication
Power On Reset
Yes/ No
Specify if a power-on reset is
occurred
HW+SW
OK/KO
Specify
if
hardware
or
software has problem
Failure Loading
Yes/No
Failure in loading process
Temp Alarm
Yes/ No
Alarm is on when temperature exceed 60 degree
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6 REMOTE CONTROL
The modulator can be remotely controlled via serial RS-232 port. Use menu (A.2) Remote
Ctrl to connect the modulator to a PC. The default serial port setting of the PC is described in
the paragraph 5.4. Teamcast provides 2 remote control software, one is in Excel format for
modulator parameter configuration and supervision, another is TuneCast for pre-correction.
6. 1 Excel Control Software
Figure 15: Excel Control Software Start Up
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Figure 16: Excel Control Software
Installation is not needed for the Excel control software. Launch the Excel control
software. Select the right serial port and communication rate from the menu in
Figure 15. When a right RS-232 connection is established, the menu in the Figure
16 is shown. Click on the Get button, we can read the modulator actual
configuration parameters. To keep real time configuration and supervision of the
modulator, select Refresh. Any change of the modulator parameter can be inputted
through this Excel menu. Any alarms of the modulator can be visualized too from
this menu. To leave the Excel control software, just click on the Quit button.
6. 2 TuneCast Software
This section describes how to install the Teamcast remote control pre-correction
software TuneCast.
Run the
file on the Desktop or on the installation CD ROM.
Follow the installation menu shown from Figure17 to Figure21.
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Figure 17: TuneCast Installation Menu 1
In a few seconds, the Installation window appears on the PC screen. Click Next.
Figure 18: TuneCast Installation Menu 2
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The default installation folder is C:\Program Files\TeamCast\TuneCast\, Click
Next to accept the default folder. User could change the default folder.
Figure 19: TuneCast Installation Menu 3
If the selections are incorrect, click Back and change the information as needed.
Once the information is correct, you must choose I accept the license
Agreement(s), click Next to continue with installation.
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Figure 20: TuneCast Installation Menu 4
Figure 21: TuneCast Installation Menu 5
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When the TuneCast is successfully installed , click Finish.
After the installation, you can see the icon of the software on the
desktop
. You can also find this software in the path Startĺ$OO
programsĺTeamCastĺTuneCast.
Connect the RS-232 port of your PC to Alto-GAF’s RS-232 port. If the connection is
failed, then the following screen will be displayed in the figure22.
Figure 22: RS-232 Connection Failure
If you connect the RS232 port successfully, the following screen will be displayed in
the figure 23 with the green lights on the right up corner and the modulation type is
shown in the rectangular.
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Figure 23: RS-232 Connection Success
In the Pre-Correction software, user can set the linear and non-linear parameters of
the modulator. The linear pre-correction is composed of Magnitude/frequency and
Group delay/frequency pre-correction. A minimum RF parameters such as
frequency, bandwidth, offset gain etc can be set in this menu. For more details,
please refer to Teamcast Tunecast user guide.
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Figure 24: Linear Pre-correction Interface
The non-linear pre-correction is composed of amplitude/amplitude AM/AM
pre-correction and amplitude/phase AM/PM pre-correction. User can either enter
the parameters in the corresponding lines, or directly drag and draw the curves. It
supports both double shoulder and single shoulder pre-correction. For more details,
please refer to Teamcast Tunecast user guide.
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Figure 25: Non Linear Pre-correction Interface
In the maintenanceˈuser can read the modulator information such as serial number,
hardware version and software version. User can also mute the RF output and reset
the modulator.
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Figure 26: Maintenance Interface
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7 FIRMWARE UPDATE
This chapter describes how to upgrade the firmware of the modulator. The version
of the MCU firmware is shown in the front panel after turn on the modulator. The 1st
line is the product name and product model. The 2nd line is the MCU firmware
version. In the 2nd line, the 1st 2 letters are for equipment type, the 3rd and 4th letters
are for hardware version and the last 3 letters are for software version.
DTMB Modulator Alto-GAF
Version B4D2M208
Step One: Turn off the modulator. Connect the PC to the serial RS-232 port of the
modulator. Make sure that the serial COM1 parameters are configured as shown on
Figure27. Start the Serial Loader software from the PC. See the copy screen here
below.
Hardware test-------------------------------------------OK
Software test----------------------------
Press Enter to Serial Loader
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Figure 27: Configure Parameters
Step Two: Turn ON the modulator, until you see the Hardware and Software Tests
menu below. During the Hardware and Software test process, click any of the
functions of the loader menu. Follow the instruction on the LCD screen; press Enter
to connect the modulator to PC loader software. If the connection is successful,
user can see the menu in the figure28 with a message “Open COM OK”.
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Figure 28: Status Information
Step Three: Press Check Null function in the loader menu (Figure29). Make sure
you have the message” Check is OK, file is not empty”.
Figure 29: Check Null Information
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Step Four: Press Read function in the loader menu (Figure30). Make sure you
finish with the message” Read OK, data has saved to RAM2”.
Figure 30: The Process of Reading
Figure 31: Read Finish
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Step Five: Press Erase function in the loader menu (Figure31). Make sure you
finish with the message” Erase OK”.
Figure 32: Erase Finish
Step Six: Use Open File function to browse the binary file H1SX.bin from the folder.
Press Write function to upgrade firmware. Make sure that you finish with the
message “Write OK”.
Figure 33: Open a *. BIN File
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Figure 34: The Process of Writing
Figure 35: Finish the Writing
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8 TROUBLE SHOOTING
Table 19: Trouble Shooting Description
TROUBLE
SOLUTION
Module status
Temperature Alarm
Shut down the modulator and check the fan at the rear of
the modulator.
General status
Output is muted
Check the TS input or user requested output mute
ASI input 1 synchronization is
No TS input on HP input 1
missing
ASI input 2 synchronization is
No TS input on HP input 2
missing
Stream 1 error
MPEG-TS synchronization is
No MPEG-TS input to the modulator from ASI1 input
missing
Uncorrected input packet
Check the MPEG-TS input from HP input
Bit rate Overflow/underflow
Change the input TS bit rate from HP input
Stream 1 warning
No PCR detected over 10
Check if TS contains PCR
seconds or PCR interval error
No NIT table detected over 10
Check the NIT table in TS stream
seconds
Inconsistent MIP information
Check the MIP packet in TS stream
MIP packet CRC error
Check the MIP packet in TS stream
A MIP packet is missing
Check the MIP packet in TS stream
Stream 2 error
MPEG-TS synchronization is
No MPEG-TS input to the modulator from ASI2 input
missing
Uncorrected input packet
Check the MPEG-TS input from LP input
Bit rate Overflow/underflow
Change the input TS bit rate from LP input
Stream 2 warning
No PCR detected over 10
Check if TS contains PCR
seconds or PCR interval error
No NIT table detected over 10
Check the NIT table in TS stream
seconds
Inconsistent MIP information
Check the MIP packet in TS stream
MIP packet CRC error
Check the MIP packet in TS stream
A MIP packet is missing
Check the MIP packet in TS stream
Reference error and mute flag
External 10 MHz reference lost
Connect 10MHz signal into 10 MHz reference
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1 PPS reference lost
Connect 1 pps signal into 1 pps reference
Incoherent MIP information
Check the content of MIP packet
User Manual
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9 REPAIR AND MAINTENANCE
Please never return the modulator to the factory before having a contact with the
Digital Horizon technical support group. Please fill the RMA Repair table.
The technical support team will help you to locate the problem and to get your
modulator operational in a minimum of time.
If together you do not succeed to fix and solve the problem, the technical support
group will allowed you to return the equipment to the factory.
Please return your module to the factory according to the following procedure:
z
Fill the return form RMA with a precise description of the problem.
z
Package the module in its original package or a similar one.
z
Send it back to Digital Horizon with a prepaid shipment at the following
address:
Digital Horizon Technology Co., Ltd
A1, Jing Jiang Office Building 35,
Bagou South Road, Hai Dian, Beijing 100089, China
Tel:
(8610) 62614285/86 ext 803
Fax: (8610)82551097
CAUTION. We strongly recommend you to use to the original box and packaging
when returning your equipment. Digital Horizon cannot honor the instrument’s
warranties if the equipment arrives at the support center damaged and it was not
shipped in its original carton or in a replacement carton (and its supporting
packaging material) purchased from Digital Horizon.
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ANNEX ĉ: AVAILABLE BIT RATE FOR 8MHz
Table 20: Available Bit Rate for 8MHz DTMB
Carrier=3780
Guard
Interval
Constellation
QPSK NR
FEC
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
QPSK
8/9ˈ 0.8
4/9ˈ 0.4
PN=420
1/9
2/3ˈ 0.6
16QAM
8/9ˈ 0.8
32QAM
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
64QAM
8/9ˈ 0.8
QPSK NR
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
QPSK
PN=595
1/7
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
16QAM
Time inter
Bit Rate(Mbps)
240
5.414
720
5.414
240
5.414
720
5.414
240
8.122
720
8.122
240
10.829
720
10.829
240
10.829
720
10.829
240
16.243
720
16.243
240
21.658
720
21.658
240
27.072
720
27.072
240
16.243
720
16.243
240
24.365
720
24.365
240
32.486
720
32.486
240
5.198
720
5.198
240
5.198
720
5.198
240
7.797
720
7.797
240
10.396
720
10.396
240
10.396
720
10.396
240
15.593
720
15.593
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8/9ˈ 0.8
32QAM
240
20.791
720
20.791
240
25.989
720
25.989
240
15.593
720
15.593
240
23.390
720
23.390
240
31.187
720
31.187
240
4.813
720
4.813
240
4.813
720
4.813
240
7.219
720
7.219
240
9.626
720
9.626
240
9.626
720
9.626
240
14.438
720
14.438
240
19.251
720
19.251
240
24.064
720
24.064
240
14.438
720
14.438
240
21.658
720
21.658
240
28.877
720
28.877
Time
Interleaver
Bit Rate(Mbps)
240
5.414
720
5.414
240
5.414
8/9ˈ 0.8
4/9ˈ 0.4
PN=595
1/7
2/3ˈ 0.6
64QAM
8/9ˈ 0.8
QPSK NR
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
QPSK
8/9ˈ 0.8
4/9ˈ 0.4
PN=945
1/4
2/3ˈ 0.6
16QAM
8/9ˈ 0.8
32QAM
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
64QAM
8/9ˈ 0.8
Carrier=1
Guard
Interval
Constellation
QPSK NR
FEC
8/9ˈ 0.8
4/9ˈ 0.4
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2/3ˈ 0.6
QPSK
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
PN=420
1/9
16QAM
8/9ˈ 0.8
32QAM
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
64QAM
8/9ˈ 0.8
QPSK NR
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
QPSK
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
PN=595
1/7
16QAM
8/9ˈ 0.8
32QAM
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
64QAM
8/9ˈ 0.8
User Manual
720
5.414
240
8.122
720
8.122
240
10.829
720
10.829
240
10.829
720
10.829
240
16.243
720
16.243
240
21.658
720
21.658
240
27.072
720
27.072
240
16.243
720
16.243
240
24.365
720
24.365
240
32.486
720
32.486
240
5.198
720
5.198
240
5.198
720
5.198
240
7.797
720
7.797
240
10.396
720
10.396
240
10.396
720
10.396
240
15.593
720
15.593
240
20.791
720
20.791
240
25.989
720
25.989
240
15.593
720
15.593
240
23.390
720
23.390
240
31.187
720
31.187
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QPSK NR
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
QPSK
8/9ˈ 0.8
4/9ˈ 0.4
PN=945
1/4
2/3ˈ 0.6
16QAM
8/9ˈ 0.8
32QAM
8/9ˈ 0.8
4/9ˈ 0.4
2/3ˈ 0.6
64QAM
8/9ˈ 0.8
User Manual
240
4.813
720
4.813
240
4.813
720
4.813
240
7.219
720
7.219
240
9.626
720
9.626
240
9.626
720
9.626
240
14.438
720
14.438
240
19.251
720
19.251
240
24.064
720
24.064
240
14.438
720
14.438
240
21.658
720
21.658
240
28.877
720
28.877
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ANNEX Ċ: MENU STRUCTURE
Table 21: Menu Structure Description
TS Sync
TS Overflow
10MHz
External 10MHz
PLL
1PPS
SIP
Alarm
RF Mute
PLL Lost
SIP Lost
Alarm
User Req
Delay
LORS
SFN Init
PLL Lost
SIP Lost
User Req
Mute Type
Delay
SYSTEM
LORS
SFN Init
Press
Left
&
Right
Remote Control
Keys to come back
NO
Reset
YES Are you sure to
reset?
Disable
PRBS=PN23
Test Mode
PRBS=PN15
PRBS=PN09
Test Tone
SFN Fine Tune
Factory Setting
No
YES Are you sure?
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19200 Bauds
38400 Bauds
RS-232 Rate
57600 Bauds
115200 Bauds
9600 Bauds
Config1
Save Config
Config2
Config3
Config4
Config
Config1
Load Config
Config2
Config3
Config4
Auto Switching
TS INPUT
ASI IN
ASI-1 IN
ASI-2 IN
4QAM
4QAM-NR
Constellation
16QAM
32QAM
64QAM
Time Interleaver
Depth=240 symbols
Depth=720 symbols
1/4,
GI
1/9ˈ
Guard Interval
MODULATION
FFT
1/7
GI
0dB
Signal
3dB
1
3780
2/5
FEC
3/5
4/5
Dual Pilot Tone
PN Type
Disable
Enable
Variable PN
Constant PN
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Freq=666000.000KHz
(30~900MHz)
RF Freq
Step=1Hz
ch=32
RF Level
-17dBm~0dBm
Step=0.1dBm
RF Offset Gain
-2~+2dB
Step=0.1dB
Spectrum
YES
Inversion
NO
6MHz
7MHz
Bandwidth
8MHz
Mute=NO Mode=Direct
Mute=NO
Mode=Progressive
RF OUTPUT
RF Out Mute
Mute=YES
Mode=Direct
Mute=YES
Mode=Progressive
NO
ASI Error Mute
YES
000sec to 249sec
RF Out Delay
Step=1sec
Disable
PLL Lost Mute
Enable
Disable
SIP Rep Mute
Enable
Press
RS-232
PRE
Linear
CORRECTION
correction
Non
Step 0.1dB
-1to +1dB
RF Spectrum Tilt
Left
&
Right
Keys to come back
Pre
Off
On
Linear
Pre-correction
Off
On
MFN
Static
Delay=0-1000ms
NETWORK
SFN/MFN
SFN
SFN Time Offset =
0-1677.7215ms
step=100ns
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NO
SIP Control
SIP
SIP+Option
Control Frame
NO
Packet
YES
BR Adapted
YES
1pps used only in SFN
NO
mode!
TX ID
0 to 65535
Network Info
Time Offset
Freq Offset
Cell ID
Power Info
Network Delay
1PPS
Rising
Falling
Internal
CLOCK REF
10MHz
External
External PPS
Disable
LORS
Enable LORS Time
Out
0 to 1000min
SN
General
HW Version
SW Version
Module Type
Status
SUPERVISION
ASI Input Sync
PCR Error
Optional GPS receiver
GPS
status
HW SW No Comp
Failure Inter Com
Maintenance
Power On Reset
HW+SW
Failure Loading
Temp Alarm
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