5963_6615E_07.14.05 A_83732B A 83732B

User Manual: A_83732B

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Agilent 83711B and 83712B
Synthesized CW Generators
Agilent 83731B and 83732B
Synthesized Signal Generators
Data Sheet

10 MHz to 20 GHz
1 to 20 GHz

Specifications describe the instrument’s
warranted performance over the 0° to
55°C temperature range unless otherwise noted.
Supplemental Characteristics are intended
to provide information useful in estimating instrument capability in your application by describing typical, but not warranted, performance. Note: Supplemental
characteristics are indicated by italic type.

Frequency

RF Output
Maximum leveled output power:
Frequency

Standard

with Option 1E1

0.01 to 1 GHz
1 to 18 GHz
18 to 20 GHz

+13 dBm
+11 dBm
+10 dBm

+13 dBm
+10 dBm
+ 8 dBm

Typical maximum available output power from 1 to 20 GHz,
at 25°C with output step attenuator (Option 1E1) installed

Typical maximum available output power from 0.01 to
1 GHz at 25°C
Minimum leveled output power: –4 dBm
with Option 1E1, –110 dBm
Display resolution: 0.01 dB
Accuracy (–4 dBm1 to maximum specified leveled output
power2):
10 MHz to 50 MHz, ±1.3 dB
50 MHz to 20 GHz, ±1.0 dB
Accuracy (over all power levels2):
10 MHz to 50 MHz, ±2.3 dB (power ≥ –90 dBm)
50 MHz to 20 GHz, ±2.0 dB (power ≥ –90 dBm)
10 MHz to 20 GHz, ±2.5 dB (power < –90 dBm)
10.5

Output Level (dBm)

Range:
Synthesized CW generators
83711B, 1.0 to 20 GHz
83712B, 10 MHz to 20 GHz
Synthesized signal generators
83731B, 1.0 to 20 GHz
83732B, 10 MHz to 20 GHz
Resolution: 1 kHz (1 Hz with Option 1E8)
Stability (with high-stability timebase, Option 1E5)
Aging rate:
<1.5 x 10 –9/day after 24-hour warm up
Temperature effects:
<1 x 10–7 over 0 to 55° C, nominally <1.4 x 10–9/° C
Line voltage effects:
<5 x 10–10 for 10% change in line voltage
Stability (without high-stability timebase)
Aging rate:
<1.0 x 10–8/day after 72 hours at 25° C ± 10° C
Temperature effects:
<5 x 10–6 over 0 to 55° C referenced to 25° C
Stability (with external 10 MHz reference):
Same as external reference.
Frequency switching time
<50 ms to within 1 kHz for any frequency step
<35 ms to within 1 kHz for <1 GHz steps not across the
10 GHz band switch point

10.0
9.5
-84.5
-85.0
-86.5

0

4

8
12
16
Carrier Frequency (GHz)

20

Typical output level accuracy and flatness at +10
and –85 dBm
Flatness:
±0.5 dB2 (power ≥ –90 dBm)
±0.7 dB2 (power < –90 dBm)
Level switching time: <17 ms
(without step attenuator range change)
Attenuator range changes occur at:
83711B, 83712B
–1 dBm, –11 dBm, –21 dBm, etc.
83731B, 83732B
–4 dBm, –14 dBm, –24 dBm, etc.
–10 dBm, –20 dBm, –30 dBm, etc. (linear AM)
Output SWR: <2.0 : 1 nominal

1. –10 dBm (linear AM)
2. The use of type-N RF connectors above 18.0 GHz degrades specification typically
by 0.2 dB.

2

User Flatness (Level) Correction

Nonharmonic spurious (≥3 kHz): <–60 dBc (includes
power supply and frequency synthesis spurious)
Nonharmonic spurious (<3 kHz): <–50 dBc
Subharmonics: none
Residual FM:
At 1 GHz, in 50 Hz to 15 kHz bandwidth: < 15 Hz Residual
FM decreases 6 dB per octave below 1 GHz.

Number of points: 2 to 401 points/table
Number of tables: up to 4
Entry modes: power meter, GPIB

Spectral Purity
SSB phase noise (dBc/Hz, CW mode):
Offsets
100 Hz

1 kHz

10 kHz

100 kHz

0.5 to <1 GHz
1 to <2 GHz
2 to <5 GHz
5 to <10 GHz
10 to 20 GHz

–78
–73
–70
–69
–65

–92
–83
–78
–78
–73

–103
–92
–83
–82
–76

–115
–107
–100
–100
–100

Phase noise decreases 6 dB/octave below 500 MHz and
reaches a floor of <–140 dBc/Hz.

RMS Deviation (Hz)

250

Carrier Freq.

200
150
100
50
0

0

4

8
12
Carrier Frequency (GHz)

16

20

Typical residual FM measured in 50 Hz to 15 kHz bandwidth,
CW mode, with high-stability timebase, Option 1E5
AM noise floor (at 0 dBm and offsets greater than
5 MHz from carrier):
0.01 to 1 GHz, <–140 dBm/Hz
1 to 20 GHz, <–150 dBm/Hz

Typical single-sideband phase noise at 50 MHz, 1 GHz,
10 GHz, and 20 GHz, 25°C, CW mode. Offsets less than
100 Hz require the high-stability timebase, Option 1E5.

Harmonic (dBc)

Harmonics:
83711B/83712B, <–50 dBc (at levels < +6 dBm)
83731B/83732B, <–55 dBc (at levels < +6 dBm)
–50
–55
–60
–65
–70
–75
–80
–85
–90

0

2

4
6
Carrier Frequency (GHz)

8

10

Typical 2nd harmonic levels measured at output power
of +6 dBm

3

This page shows modulation specifications that are available only for
the 83731B and 83732B, and not for the 83711B and 83712B.

Agilent 83731B and 83732B
Modulation Specifications
Pulse Modulation1
Carrier
Frequency
Minimum
Pulse width

MHz
<25

25 to
<64

<1 µs

Internal Pulse Source

64 to
<128

128 to
<500

<100 ns

GHz
1 to
20

<25 ns
Typically <10 ns

Rise/Fall Time <500 ns <350 ns <50 ns

<35 ns

Video
Feedthrough

<2 mV peak-to-peak at 0 dBm

Pulse Width
Compression

±150 ns

Pulse Delay
<1 µsec
(Video outto RF out)

500 to
<1000

<15 ns

<10 ns
<20 mV
peak-topeak
at 0 dBm

±15 ns

±5 ns

<200 ns

<125 ns <100 ns

Pulse source modes: free-run, triggered with delay, doublet,
and gated. Triggered with delay, doublet, and gated require
external trigger source.
Pulse repetition frequency: 3 Hz to >3 MHz
Pulse repetition interval (PRI): 300 ns to 419 ms
Pulse width (Tw): 25 ns to 419 ms
Variable pulse delay
Free-run mode (Td): ±419 ms
Triggered with delay and doublet modes (Td):
225 ns to 419 ms with ±25 ns jitter
Pulse width/delay/PRI resolution: 25 ns
Pulse delay (video to RF, Tm):
1 to 20 GHz, <20 ns nominal
All pulse modulation specifications and supplemental
characteristics apply during use of internal pulse source.
Sync
Output
Td

On/off ratio: >80 dB

Video
Output

75

50%

85
On/Off Ratio (dB)

50%
Tw

Tp

Tm

95

RF Pulse
Output

105

vor

50%
10%

vf

Trf

115
125

0

4

8
12
Carrier Frequency (GHz)

16

20

Typical pulse modulation on/off ratio at +8 dBm

90%
Tr

Tf

Td video delay (variable)
Tm RF delay
Tw video pulse width (variable) Trf RF pulse width
Tp pulse period (variable)
Tf RF pulse fall time

Tr RF pulse rise time
Vor overshoot and ringing
Vf video feedthrough

Maximum pulse repetition frequency: >3 MHz
Minimum pulse duty cycle: no restrictions on duty cycle
Pulse level accuracy: ±1.0 dB (relative to CW)
Pulse overshoot: <10 %
Input impedance: 50Ω nominal; TTL drive levels
Maximum leveled output power in pulse mode: –0.5 dB
(relative to CW)

Timebase = 10.0 ns/div
Carrier Frequency = 10.0 GHz

Risetime = 4.9 ns
Falltime = 2.05 ns

Typical pulse modulation envelope illustrates the fast rise
and fall times, excellent flatness, and pulse fidelity of the
83731B/83732B.
4

1. CW power will be present for up to 10 ms when changing frequency or
power level.

This page shows modulation specifications that are available only for
the 83731B and 83732B, and not for the 83711B and 83712B.

Frequency Modulation

Linear Amplitude Modulation

Rates: 1 kHz to 1 MHz
Flatness: ±2 dB

Sensitivity:
Two ranges, selectable: 30%/Vpk and 100%/Vpk
Sensitivity accuracy:
(1 kHz) ±8% of value ±2%, (15 to 35°C)
Maximum Depth: 90%
Bandwidth: (3 dB, 30% depth) DC to >100 kHz
Incidental phase modulation: (30% depth) <0.4 radians peak
Maximum carrier level in linear AM mode (relative to CW):

Frequency

Maximum Deviation2

Modulation Index

2 to 20 GHz
1 to <2 GHz
500 MHz to <1 GHz
256 to <500 MHz

10 MHz peak
5 MHz peak
2.5 MHz peak
1.25 MHz peak

>300
>150
>75
>37

The modulation index and maximum deviation decrease
by a factor of 2 for each octave below 256 MHz.

With no modulation input

<1 GHz
0 dB

FM sensitivity:

With modulation

degrades up to 6 dB depending on depth

Frequency

Seven ranges, selectable

1 to 20 GHz
256 MHz to <1 GHz
64 to <256 MHz
16 to <64 MHz
10 to <16 MHz

10, 5, 3, 1, 0.3, 0.1, 0.03 MHz/V pk
2500, 1250, 750, 250, 75, 25, 7.5 kHz/V pk
625, 312, 187, 62.5, 18.7, 6.25, 1.87 kHz/V pk
156, 78.1, 46.8, 15.6, 4.68, 1.56, 0.468 kHz/V pk
78.1, 39.0, 23.4, 7.81, 2.34, 0.871, 0.234 kHz/V pk

FM sensitivity accuracy: ±10% at 100 kHz
Incidental AM: <5%
FM input impedance: 600Ω nominal
Harmonic distortion: <1% (1 MHz peak deviation
at 100 kHz rate)

1 to 4 GHz
–4.5 dB

>4 GHz
–1.0 dB

Logarithmic Amplitude
Modulation (Scan Modulation)
Maximum depth: > 60 dB
Sensitivity: –10 dB/V; (0 to +6V for 0 to –60 dBc)
Step response (50 dB change in level):
< 1 GHz, < 10 µs rise time, < 20 µs fall time
1 to 20 GHz, < 5 µs rise and fall times
Input impedance: 5000Ω nominal
Maximum leveled output power in log AM mode
(relative to CW):
<1 GHz
0 dB

Option 800 Phase Modulation
Sensitivity:

1 to 4 GHz
–4.5 dB

>4 GHz
–1.0 dB

Two ranges, selectable
Low Range

Peak Power Level = 0 dBm

High Range

5.00
Log AM Error 1-4 GHz

Accuracy
Flatness
Bandwidth
Input Impedance

Log AM Error 10 GHz

1 rad/V pk
0.25 rad/V pk
.0625 rad/V pk
0.0156 rad/V pk
0.00781 rad/V pk

50 rad/V pk
12.5 rad/V pk
3.12 rad/V pk
0.781 rad/V pk
0.39 rad/V pk

±5% (at 1 kHz)
±10% (at 100 Hz)
DC to 100 kHz: ±1 dB DC to 30 kHz: ±2 dB
>1 MHz (3 dB)
usable to 1 MHz
at low deviations
600 ohms nominal
600 ohms nominal

Error (dB)

Frequency
1 to 20 GHz
256 MHz to <1 GHz
64 to <256 MHz
16 to <64 MHz
10 to <16 MHz

Log AM Error 4-20 GHz
–5.00
0

5 10 15 20 25 30 35 40 45 50 55
Desired Log AM Depth (attenuation) in dB

60

Typical log AM error (deviation from desired depth) at
25°C for carrier frequencies between 1.0 and 20 GHz

Simultaneous Modulations
Maximum deviation:

2

Frequency

Low Range

High Range

2 to 20 GHz
1 to <2 GHz
500 to <1 GHz
256 to <500 MHz

4 rad
2 rad
1 rad
0.5 rad

200 ra
100 rad
50 rad
25 rad

The maximum deviation decreases by a factor of 2 for each
octave below 256 MHz.

Full AM bandwidth and depth is available at any pulse rate
or width. FM/FM is completely independent of AM and
pulse modulation.

2. With sine wave modulation only.

5

Option 1E2: Internal
Modulation Generator
Available in 83731B and 83732B models only.
Specifications for internal modulation are same as
base instrument, unless noted below.
Waveforms
Sine wave: 0.5 Hz to 1 MHz rates
Ramp, square, triangle: 0.5 Hz to 100 kHz rates
Uniform noise, Gaussian noise
Rate accuracy: < ± .01%
Internal scan modulation
Rate: 0.5 Hz to 20 kHz
Rate Resolution: 0.5 Hz (3 digits displayed)
Depth resolution: 0.01 dB
Internal linear AM
Rate: 0.5 Hz to 100 kHz
Rate Resolution: 0.5 Hz (3 digits displayed)
Depth resolution: 0.1%
Internal FM
Rate: 1 kHz to 1 MHz
Rate Resolution: 0.5 Hz (3 digits displayed)
Deviation resolution: 0.01 Hz
Flatness: ±2 dB (1 to 500 kHz)
Internal phase modulation (with Option 800 only)
Rate: 0.5 Hz to 1 MHz
Rate Resolution: 0.5 Hz (3 digits displayed)
Deviation resolution: 0.01 rad
Bandwidth: 700 kHz (3 dB) on low range

General
Noise figure meter compatibility
Agilent 8370 sources are fully compatible with and
can be controlled by the 8970B noise figure meter
through Special Function 41.5.
Programming
These instruments are fully compatible with
the Standard Commands for Programmable
Instruments (SCPI). SCPI complies with IEEE
488.2-1987.
In addition, these instruments will emulate most
applicable Agilent 8673 commands, providing general compatibility with ATE systems which include
8673 series signal generators.
Environmental
Operating temperature range: 0° to 55°C
EMC: complies with CISPR Pub. 11/1990, Class A,
and Mil-Std-461C, Part 2, Methods CE03, CS01, CS02,
RE02, RS03
6

Power requirements
Power: 90 to 132V, 48 to 440 Hz; 198 to 264V,
48 to 66 Hz; 260 VA maximum
Physical dimensions
Net weight: <16 kg (35 lb) Shipping: <23 kg (49 lb)
Size: 498 mm D x 426 mm W x 133 mm H
(19.6in x 16.8in x 5.2in)
Transit case available by ordering Agilent part
number 9211-2655.

Front Panel Connectors

83731B/83732B front panel
RF output
Type-N precision, or 3.5 mm precision (Option 1E9).
Nominal impedance is 50 ohms.
ALC in
Used for external leveling with either a power meter
or a positive- or negative-polarity diode detector.
AM in (83731B/83732B only)
Accepts input signal for external linear AM or log
AM. Nominal impedance is 5k ohms.
FM/FM in (83731B/83732B only)
Accepts input signal for external FM or phase
modulation (Option 800 only). Nominal impedance
is 600 ohms.
Pulse/trigger gate in (83731B/83732B only)
Accepts input signal for external pulse modulation.
Also accepts external trigger pulse input for internal pulse modulation. TTL-level compatible, nominal impedance is 50 ohms.
Pulse video out (83731B/83732B only)
Outputs a signal that follows the RF output in all
pulse modes. TTL-level compatible, nominal source
impedance is 50 ohms.
Pulse sync out (83731B/83732B only)
Outputs a synchronizing pulse, nominally 50 ns
width, during internal and triggered pulse modulation. TTL-level compatible, nominal source impedance is 50 ohms.

Rear Panel Connectors
8370 SERIES
GENERATOR

83731B/83732B rear panel

Ordering Information:
Products
83711B
83712B
83731B
83732B

Options
To add options to a product, use the following ordering scheme:
Model:
837xxB (x = 11, 12, 31 or 32)
Model Options:

10 MHz input
Accepts a 10 MHz ±100 Hz, 0 to 10 dBm, external reference signal for operation from an
external high stability timebase. Nominal input
impedance is 50Ω.
10 MHz output
Outputs the 10 MHz reference signal, nominally
+3 dBm, for use as an external reference signal.
Nominal source impedance is 50Ω.
0.5V/GHz output
Supplies a voltage proportional to output frequency for use with mm-wave frequency multipliers, including the Agilent 83550 Series
Millimeter Wave Source Modules.
AM output (Option 1E2 only)
Provides a sample of the modulating signal
from the internal AM generator or external AM
input.

Frequency range
1 to 20 GHz synthesized CW generator
0.01 to 20 GHz synthesized CW generator
1 to 20 GHz synthesized signal generator
0.01 to 20 GHz synthesized signal generator

837xxB-1E1
837xxB-1E2
837xxB-1E5
837xxB-1E8
837xxB-1E9
837xxB-800
837xxB-0B2
837xxB-0BV
837xxB-0BW
837xxB-1CM
837xxB-1CP
837xxB-1CR

837xxB-opt#1
837xxB-opt#2
Adds 110 dB output step attenuator
Adds internal modulation generator (83731B/32B only)
Adds high-stability timebas
1 Hz frequency resolution
3.5 mm RF output connector
Analog phase modulation (83731B/32B only)
Extra operating manual
Service documentation, component level
Service documentation, assembly level
Rack mount kit (Part number 5062-3977)
Rack mount and handle kit (Part number 5062-3983)
Rack slide kit (Part number 1494-0059)

Warranty and Service
For warranty and service of 5 years, please order 60 months
of R-51B (quantity = 60). Standard warranty is 36 months.
R-51B
Return-to-Agilent warranty and service plan
Calibration1
For 3 years, order 36 months of the appropriate calibration plan shown below.
For 5 years, specify 60 months.
R-50C-001
Standard calibration
R-50C-002
Standards compliant calibration

FM/FM output (Option 1E2 only)
Provides a sample of the modulating signal
from the internal FM/FFM generator or external FM/FFM input.

1. Options not available in all countries.

7

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Phone or Fax
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(tel) 1 800 452 4844
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(tel) 1 877 894 4414
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(tel) 800 810 0189
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Email: tm_asia@agilent.com

Product specifications and descriptions
in this document subject to change
without notice.
© Agilent Technologies, Inc. 2002, 2005
Printed in USA, July 14, 2005
5963-6615E



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