Agilent N8972A, N8973A, N8974A, N8975A NFA Series Noise

Agilent N8972A, N8973A, N8974A, N8975A NFA Series Noise
Agilent
N8972A, N8973A, N8974A, N8975A
NFA Series Noise Figure Analyzers
Data Sheet
Specifications
Specifications are only valid for the stated operating frequency, and apply over
0° C to +55° C unless otherwise noted. The analyzer will meet its specifications
after 2 hours of storage within the operating temperature range, 60 minutes after
the analyzer is turned on, with Alignment running. A user calibration is required
before corrected measurements can be made.
Frequency
Frequency range1
10 MHz to 1.5 GHz
10 MHz to 3.0 GHz
10 MHz to 6.7 GHz
10 MHz to 26.5 GHz
N8972A
N8973A
N8974A
N8975A
Measurement bandwidth (nominal)
N8972A
4 MHz
N8973A, N8974A, N8975A 4 MHz, 2 MHz, 1 MHz, 400 kHz, 200 kHz, 100 kHz
Frequency reference
Standard2
± < 2 ppm4/year
± < 6 ppm
± < 0.5 ppm
Aging
Temperature stability
Settability
Opt.1D53
± < 0.1 ppm/year
± < 0.01 ppm
± < 0.01 ppm
Tuning Accuracy 5 (Start, Stop, Center, Marker)
4MHz measurement Bandwidth (default on all models of Noise Figure analyzer)
Frequency
Error
10MHz – 3.0 GHz
3.0GHz – 26.5 GHz
±< Reference error + 100 kHz
±< Reference error + 400 kHz
<4 MHz- Measurement Bandwidth (functionality not present in N8972A)
Frequency
Error
10MHz – 3.0 GHz
3.0GHz – 26.5 GHz
<± Reference error + 20 kHz
<± Reference error + 20% of measurement bandwidth
1. The N8974A and N8975A models have a mechanical switch fitted. This switch allows the analyzers to change between the 10 MHz to 3.0GHz
and the 3.0 GHz to 6.7 GHz frequency range on the N8974A. On the N8975A, the switch allows the change between the 10 MHz to 3.0 GHz and the 3.0GHz to
26.5 GHz frequency range. If the current measurement frequency range crosses the 3.0GHz point, the switch will operate. The mechanical switch has a limited
number of cycles over which it is reliable. To maximize the reliable life of the switch, switching over the 3.0GHz frequency point should be kept to a minimum.
2. Temperature stability on the standard frequency reference is achieved 60 minutes after the analyzer is turned on.
3. Option 1D5 recommended for applications requiring high frequency stability.
4. Parts Per Million (10-6).
5. Tuning accuracy is dependent on measurement bandwidth.
2
Noise figure and gain
Performance is dependent on the ENR1 of the noise source used:
N8972A
Noise figure
Gain2
Noise source ENR
Measurement range
Instrument uncertainty
Measurement range
Instrument uncertainty
4-7 dB
0 to 20 dB
± < 0.1 dB
N8973A, N8974A and N8975A
Noise source ENR
(10 MHz to 3.0 GHz)
Noise figure
Gain2
Measurement range
Instrument uncertainty
Measurement range
Instrument uncertainty
4-7 dB
12-17 dB
0 to 20 dB
± < 0.05 dB
0 to 30 dB 0 to 35 dB
± <0.05 dB ± < 0.1 dB
-20 to +40 dB
± < 0.17 dB
N8974A and N8975A
Gain2
20-22 dB
Noise source ENR
(>3.0 GHz)
Noise figure
12-17 dB
20-22 dB
0 to 30 dB
0 to 35 dB
± < 0.1 dB
± < 0.15 dB
-20 to +40 dB
± < 0.17 dB
Measurement range
Instrument uncertainty
Measurement range
Instrument uncertainty
4-7 dB
12-17 dB
0 to 20 dB
± < 0.15 dB
0 to 30 dB 0 to 35 dB
± <0.15 dB ± < 0.2 dB
-20 to +40 dB
± < 0.17 dB
20-22 dB
Instrument’s noise figure
Noise figure
Noise figure
over a limited
temperature
range of
23° C ± 3° C
1.
2.
10 MHz to
< 500 MHz
< 4.9 dB +
(0.0025 *
freq in MHz)
< 4.4 dB +
(0.0025 *
freq in MHz)
500 MHz to
< 2.3 GHz
< 7.4 dB +
(0.00135 *
freq in MHz)
< 5.9 dB +
(0.00135 *
freq in MHz)
2.3 GHz to
3 GHz
< 4.4 dB +
(0.0015 *
freq in MHz)
< 2.9 dB +
(0.0015 *
freq in MHz)
> 3 GHz to
13.2 GHz
< 12 dB
13.2 GHz to
26.5 GHz
< 16 dB
< 10.5 dB
< 12.5 dB
Excess Noise Ratio
For measurement bandwidths below 4 MHz, and spacing between measurement points below 3 MHz,
gain uncertainty may increase to a maximum of ± 0.7 dB.
3
Characteristic1 noise figure at 23° C ±3° C (10 MHz to 3.0 GHz)
Noise Figure (dB)
10
8
6
4
2
0
10
500
1000
1500
2000
2500
3000
Frequency (MHz)
Characteristic1 noise figure at 23° C ±3° C (3.0 GHz to 26.5 GHz)
Maximum external gain between noise source output and RF input2
> 65 dB
Averaging
Up to 999 measurement results
Jitter3
Jitter with no averaging4
1.
2.
3.
4.
5 dB Y-factor standard deviation < 0.1 dB
Characteristic values are met or bettered by 90% of instruments with 90% confidence.
Subject to maximum operating input power.
Specified for a 4 MHz measurement bandwidth. Jitter in noise figure is equivalent to jitter in Y-factor to within 10% for ENR>14dB and F<4dB.
At minimum smoothing, jitter can limit accuracy; the small jitter at high smoothing does not.
For true Gaussian noise, jitter reduces with increased averaging typically by a factor of 1/√(number of averages)
4
RF input
Connector
N8972A, N8973A N female, 50 Ω nominal
N8974A, N8975A APC 3.5 (m), 50 Ω nominal (ESD sensitive)
SWR (50 Ω reference)
SWR
10 MHz to 500 MHz to 1 GHz to
500 MHz
1 GHz
1.5 GHz
< 1.6:1
< 1.8:1
< 1.9:1
1.5 GHz to 3 GHz to
3 GHz
6.7 GHz
< 1.8:1
< 1.3:1
6.7 GHz to 20 GHz to
20 GHz
26.5 GHz
< 2.1:1
< 2.4:1
Characteristic1 SWR at 23° C ±3° C (10 MHz to 3.0 GHz)
2
SWR
1.8
1.6
1.4
1.2
1
10
500
1000
1500
2000
2500
3000
Frequency (MHz)
1.
Characteristic values are met or bettered by 90% of instruments with 90% confidence.
5
Characteristic1 SWR at 23° C ±3° C (3.0 Ghz to 26.5 Ghz)
Maximum operating input power2
-10 dBm
Maximum protected input level
±20 Vdc; +15 dBm peak (or average) at RF
1.
2.
Characteristic values are met or bettered by 90% of instruments with 90% confidence.
This is the total wide-band noise power. Contributing factors are: Noise source ENR, external gain, noise figure and bandwidth (including DUT).
6
Measurement
Sweep
Number of points
Setting
Sweep trigger
2 to 401, or fixed frequency
Start/Stop, Center/Span,
Frequency list of up to 401 points
Continuous or Single
Measurement speed1 (nominal)
8 averages
N8972A ( 10 MHz to 1.5 GHz)
<100 ms/measurement
N8973A ( 10 MHz to 3.0 GHz)
<50 ms/measurement
8 averages
N8974A ( 10 MHz to 3.0 GHz)
< 50 ms/measurement
N8974A ( 3.0 GHz to 6.7 GHz)
< 70 ms/measurement
N8975A ( 10 MHz to 3.0 GHz)
< 50 ms/measurement
N8975A ( 3.0 GHz to 26.5 GHz) < 70 ms/measurement
Modes
Amplifier
Downconverter in DUT
Upconverter in DUT
System downconverter
Loss compensation
SNS Series noise source
1.
2.
64 averages
<80 ms/measurement
<42 ms/measurement
64 averages
<42 ms/measurement
<50 ms/measurement
<42 ms/measurement
<50 ms/measurement
With fixed or variable IF.
Instrument capable of controlling an external
LO via dedicated 'LO GPIB' connector
With fixed or variable IF.
Instrument capable of controlling an external
LO via dedicated 'LO GPIB' connector
Allows the use of an external downconverting
mixer as part of the measurement system.
Instrument capable of controlling an external
LO via dedicated 'LO GPIB' connector
Table of values vs. frequency for losses between
noise source and DUT, and between DUT
and analyzer
ENR tables automatic upload. Continuous upload
of Tcold
Corrected Noise Figure and Gain measured on a 3dB pad with a repetitive sweep of 101 points from 600 MHz to 1.0 GHz with a 4 MHz measurement bandwidth.
Corrected Noise Figure and Gain measured on a 3dB pad with a repetitive sweep of 101 points from 4.0 GHz to 6 GHz with a 4 MHz measurement bandwidth.
7
Display
Type
Output format
Display channels
Number of markers
Limit lines
Display units
Noise figure
Gain
Y-factor
Effective noise temperature
Phot
Pcold
17cm color LCD panel
Graphical, table of values, or meter mode
2
4 per display channel
Upper and lower for each of 2 channels
Noise figure (F dB), or as a ratio (F)
Gain (G dB), or as a ratio (G)
Y-factor (Y dB) or as a ratio (Y)
Effective input noise temperature in Kelvin, °C, °F
Relative power density in dB or as a ratio
Relative power density in dB or as a ratio
Connectivity
GPIB
LO GPIB
Serial
Printer
VGA output
Probe power (nominal)
10 MHz Ref out
10 MHz Ref in
BNC Noise source drive output
Connector type
Output voltage
SNS Noise source connector
1.
IEEE-488 bus connector
IEEE-488 bus connector dedicated to local
oscillator control (SCPI or custom command set)
RS-232, 9-pin D-Sub male
25-pin parallel D-Sub female, for connection
with IEEE 1284 cable to a PCL3 or PCL5
compatible printer
15-pin mini D-Sub female1
+15 Vdc, -12.6 Vdc at 150 mA max.
50 Ω nominal BNC (f), >0 dBm
50 Ω nominal BNC (f), -15 to +10 dBm
50 Ω-type BNC (f)
On: 28.0 V ±0.1 V at up to 60mA peak
Off: <1 V
For use with Agilent Technologies’
SNS Series noise sources
31.5 kHz horizontal, 60 Hz vertical sync rates, non-interlaced, analog RGB 640 x 480
8
General specifications
Data storage (nominal)
Internal drive
Floppy disk
Power requirements
On (line 1)
Standby (line 0)
30 traces, states or ENR tables
30 traces, states or ENR tables
90 to 132 V rms, 47 to 440 Hz
195 to 250 V rms, 47 to 66 Hz
Power consumption<300 W
<5 W
Dimensions
Without handle
With handle (max)
222mm(H) x 410mm(D) x 375mm(W)
222mm(H) x 515mm(D) x 409mm(W)
Weight (typical, without options)
N8972A
N8973A
N8974A
N8975A
15.3 kg
15.5 kg
17.5 kg
17.5 kg
(33.7 lbs.)
(34.2 lbs.)
(38.61 lbs.)
(38.61 lbs.)
Audible noise
<42 dBa pressure and <5.0 bels power (ISODP7779)
Temperature range
Operating
Storage
Humidity range
Operating
Altitude range
Operating
0° C to +55° C
-40° C to +70° C
Up to 95% relative humidity to 40° C
(non-condensing)
to 4,600 meters
Calibration interval
1-year minimum recommended
9
Electromagnetic Compatibility
This product conforms with the protection requirements of European Council Directive
89/336/EEC for Electromagnetic Compatibility (EMC).
The conformity assessment requirements have been met using the technical
Construction file route to compliance, using EMC test specifications EN 55011:1991
(Group 1, Class A) and EN 50082-1:1992.
In order to preserve the EMC performance of the product, any cable which becomes
worn or damaged must be replaced with the same type and specification.
Radio-Frequency Electromagnetic
Field Immunity
When a 3 Vm-1 radio-frequency electromagnetic field is applied to the noise figure
analyzer according to IEC 61000-4-3:1995, degradation of performance may be observed.
When the frequency of the incident filed matches the frequency of a measured noise
figure or gain, the values displayed will deviate from those expected. This phenomenon
will only affect that specific frequency, and the analyzer will continue to perform to
specification at all other frequency sample points.
The noise figure analyzer may be unable to calibrate a chosen frequency sample point,
if the frequency matches that of an incident electromagnetic field. 1
1. Radiated Immunity Testing. When tested at 3 V/m, according to IEC 801-3/1984, the displayed average noise level will be within specifications over the full
immunity test frequency range of 27 MHz to 500 MHz except at the immunity test frequencies of 223.5714 MHz +/- selected resolution bandwidth, and
437.1429 MHz +/- selected resolution bandwidth, where the displayed average noise level can be up to -45 dBm. When the noise figure analyzer
tuned frequency is identical to these immunity test frequencies, the measurements could be corrupted and there may be signals of up to -70 dBm
displayed on the screen.
10
For further information
Key literature:
Please visit the Agilent noise figure analysis web site for on-line
access to literature or contact your local Agilent sales office or
representative.
Noise Figure Analyzers - NFA Series - Brochure,
literature number 5980-0166E
Noise Figure Analyzers - NFA Series - Configuration Guide,
literature number 5980-0163E
Fundamentals of RF and Microwave Noise Figure Measurements,
Application Note 57-1, literature number 5952-8255E
Noise Figure Measurement Accuracy, Application Note 57-2,
literature number 5952-3706E
10 Hints for Making Successful Noise Figure Measurements;
Application Note 57-3, literature number 5980-0288E
Key web resources:
For the latest information on our noise figure solutions, see our
web page at:
www.agilent.com/find/nf
For the latest news on the component test industry, see our
web page at:
www.agilent.com/find/component_test
For the latest news in the aerospace industry, see our web page at:
www.agilent.com/find/aerospace
11
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Product specifications and descriptions
in this document subject to change
without notice.
Copyright © 2001 Agilent Technologies
Printed in USA August 28, 2001
5980-0164E
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