Agilent 83751A Data Sheet

Signal Sources

224 Synthesized Microwave Sweepers

HP 83751A
HP 83751B
HP 83752A
HP 83752B

• Fully synthesized (phase-locked) CW, step, and ramp modes

• 2 MHz swept frequency accuracy

• Power flatness correction

• Broad 20 GHz frequency coverage

• +17 dBm output power at 20 GHz

• Internal pulse generator

HP 83753B

HP 83750 Series Sweepers 2

5

The HP 83750 sweepers bring outstanding synthesized performance to
the component-test marketplace. They deliver the best performance for
the price in general-purpose benchtop, swept test, or scalar applications.

The latest technological advances in fundamental oscillator design
provide up to 20 GHz of frequency coverage with superior harmonic
suppression and no subharmonics. When this excellent spurious per­formance is combined with high-output power capabilities, high-mea­surement dynamic range is achieved.

The HP 83750 synthesized sweepers provide superior accuracy and
stability while maintaining the speed of analog sources. Fully-synthe­sized CW, stepped, and ramp sweep modes are available in broadband
and narrowband operation. The synthesis capabilities are particularly
useful for the characterization of narrowband devices, in which the fre­quency instabilities of open-loop sources become most apparent.

Excellent output-power flatness and accuracy can be translated to
the input port of the device-under-test with the power flatness correc­tion feature of these sources. This feature uses a power meter to create
an array of power corrections that compensate for power variations in
the measurement path between the source and the test device.

Swept testing of frequency translation devices can be achieved sim­ply and economically with the HP 83570 series synthesized sweepers. A
traditionally difficult measurement, sweeping the RF and local oscillator
(LO) input ports at a fixed of fset over a wide frequency span, is easy to
implement with superior frequency accuracy by positioning two synchro­nously tracking HP 83750s in a two-tone configuration. With broadband
frequency coverage and excellent perfor mance, the HP 83750 synthesized
sweepers are ideal stimuli for frequency translation measurements.

The HP 83750 series make optimal companion sources for scalar­measurement applications. Full compatibility is available via the HP 8757
system interface bus. The HP 8757D scalar analyzer and HP 83750 series
have a complementary design that achieves superior frequency accuracy,
power accuracy and flatness while significantly reducing measurement
uncertainty. In addition, the HP 83750’s high-power and low-harmonic
capabilities increase the spurious-free measurement dynamic range of
scalar systems. Ten independent, continuously variable markers and a
marker sweep function allow fast, efficient analysis of the test device at or
between critical measurement frequencies. CW, stepped, ramp, or power
sweep modes are available for device characterization. A 25 dB power
sweep range is particularly useful for compression measurements of
active devices such as amplifiers and mixers.

The high-power models HP 83751B and 83752B provide +17 dBm
output power with –20 dBc harmonics from 2 to 20 GHz. This high­power capability eliminates the need to externally amplify the signal for
test devices that require high-input power levels. When Option 1EE
(source module interface connector and extension cable) is added,
these sources can directly drive the HP 83550 series mm-wave source
modules to provide waveguide frequency coverage up to 110 GHz.
All HP 83750 sweepers with Option 1EE automatically provide bias,
power flatness correction, and internal leveling for the HP 83550 series
source modules.

HP 83750 sweepers offer two operating languages to ensure com­patibility with instruments today and in the futur e. The default language is
SCPI (Standard Command for Programmable Instruments), an industry
standard. The second operating language employs HP 8350 mnemonics
to provide programming compatibility with HP 8350-based measure­ment systems.

Signal Sources

225Synthesized Microwave Sweepers

Specifications
Frequency Characteristics

Frequency Range

HP 83751B: 2 to 20 GHz
HP 83752B: 0.01 to 20 GHz

Internal Reference Oscillator

Frequency: 10 MHz
Timebase Stability

Standard Timebase: ± 10 x 10
High-Stability Timebase (Option 1E5)
Aging Rate: 5 x 10

–10

Temperature Effects: 1 x 10
Line Voltage Effects: 5 x 10

–6

⁄day; 1 x 10–7⁄ year

–10

/ ˚C

–10

(10˚ change in voltage)

CW and Manual Modes

Accuracy: Stability x f
Resolution: 1 Hz

time base

c

Switching Time (typical):70 ms max.

Ramp Sweep Mode

Accuracy

stability x f

Sweep Time: 10 ms to 100 s; 50 ms for full span

1, 2

: The greater of ± 0.01% of span ± timebase

or ± 75 k Hz ± timebase stability x f

c

c

Resolution: 1 kHz

Step Sweep Mode

Accuracy: Timebase stability x f
Number of Points: 2 to 1601
Switching Time (typical)

c

3

: 7 ms ± 8 ms/GHz step

Output Power Characteristics

Maximum Leveled Power

HP 83751A, 83752A: 10 dBm
HP 83751B, 83752B: 17 dBm (16 dBm < 2 GHz on HP 83752B)

Minimum Settable Power

HP 83751A, 83752A: –15 dBm (–85 dBm w/Option 1E1)
HP 83751B, 83752B: –10 dBm (–80 dBm w/Option 1E1)

Resolution: 0.01 dB settable
Accuracy

1

HP 85751A, 83752A only: ± 1.0 dB (levels > –10 dBm)
HP 83751A/B, 83752A/B: ± 1.5 dB (levels > –75 dBm)

Flatness

HP 85751A, 83752A only: ± 0.7 dB (levels > –10 dBm)

HP 85751A/B, 83752A/B: ± 1.3 dB (levels > –75 dBm)
Power Sweep Range: 25 dB/sweep
Power Slope Range: 0 to ± 2 dB/GHz, 25 dB max
Source Match (typical): < 1.7:1 SWR

1, 4

Spectral Purity

Harmonics

HP 83751A, 83752A: –45 dBc (–30 dBc < 1.5 GHz on HP 83752A)

HP 83751B, 83752B: –20 dBc

Subharmonics: None

Non-Harmonic Spurious

Residual FM: 1 kHz RHS in CW mode (0.05 to 15 kHz BW)

Phase Noise (typical): < –75 dBc/Hz at 10 GHz in CW mode,

10 kHz offset

5

: –50 dBc

Modulation

External AM (typical)

Sensitivity: 1 dB/V
3 dB Bandwidth: > 100 kHz, usable to 1 MHz

Depth

HP 83751A, 83752A: 20 dB (–10 to + 10 dBm)
HP 83751B, 83752B: 22 dB (–5 to + 17 dBm)
Input Impedance: 3.5 Ω

External FM (typical)

DC/Unlocked Mode

Rates: dc to 10 MHz
Maximum Deviation

dc to 100 Hz Rates: ± 75 MHz
100 Hz to 1 MHz Rates: ± 7 MHz
1 to 2 MHz Rates: ± 5 MHz
2 to 10 MHz Rates: ± 1 MHz

AC/Locked Mode

Rates: 50 kHz to 10 MHz
Maximum Deviation: Same as unlocked mode up to 25 x rate

Pulse (typical)

On/Off Ratio: 60 dB
Rise/Fall Times

50 MHz to 2 GHz: 15 ns
2 to 20 GHz: 100 ns rise/50 ns fall

Minimum Pulse Width: 2 µs
Internal Pulse Generation

Width Range: 1 µs to 65 ms
Period Range: 2 µs to 65 ms
Resolution: 1 µs

Internal Square Wave: 1 kHz and 27.8 kHz (scalar analyzer mode)

General

Bandwidth Points: 2 GHz, 3.75 GHz, 6.75 GHz, and 11 GHz.

The 3.75 and 6.75 GHz synthesizer switch will disappear if
sweep is < 0.8 of an octave in the 2 to 11 GHz band.

RF Output Connector: 3.5 mm
Option 1ED: Type-N
Operating Temperature Range: 0˚ to 55˚ C
Weight: Net 16 kg (35 lb)
Size: 425 W mm x 133 H mm x 483 D mm (16.75 in x 5.25 in x 19 in)

Key Literature

HP 83751A/B and HP 83752A/B Synthesized Sweepers

Technical Data, p/n 5091-5908E

Ordering Information

HP 83751A 2 to 20 GHz Synthesized Sweeper
HP 83751B 2 to 20 GHz Synthesized Sweeper (High Power)
HP 83752A 0.01 to 20 GHz Synthesized Sweeper
HP 83752B 0.01 to 20 GHz Synthesized Sweeper (High Power)

The following options apply to all models:

Opt 1E1 70 dB Step Attenuator
Opt 1E4 Rear-Panel RF Output
Opt 1E5 High-Stability Time Base
Opt 1ED Type-N Connector Output
Opt 1EE Source Module Interface Connector

and Extension Cable

1

For operating temperatures of 25 ± 5° C.

2

For 100 ms sweep times; improves with slower sweeps.

3

Up to 50 ms switching times can occur when crossing the 2 GHz band switch point.

4

Option 1E1 reduces output power up to 1 dB.

5

For spurs > 500 kHz from output frequency.

HP 83751A
HP 83751B
HP 83752A
HP 83752B

5

Internet URL www.hp.com/go/tmc99 Product & Order Info See inside back cover