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RF 교정기

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The key component in an RF and microwave calibration system

The Fluke 9640A and 9640A-LPNX RF Reference Sources are designed specifically for RF calibration (including spectrum analyzer calibration, network analyzer calibration, attenuator calibration, and more), featuring a calibration-oriented user interface, precision signal level and attenuation, high signal purity and precision low distortion modulation. This unique combination of features and performance makes them clearly superior to the general purpose signal generators that are often used in RF calibration systems, with the 9604A-LPNX low phase noise version providing superior phase noise performance.


The 9640A Series simplifies and speeds up calibration procedures, reduces opportunities for operator errors, and greatly simplifies RF metrology. As the core of an RF and microwave calibration system, the 9640A Series covers the majority of test points required for calibrating spectrum analyzers of any frequency range.


Used manually or automated with MET/CAL® Plus Calibration Management Software, the 9640A rf reference reduces complexity and calibration times, dramatically improving efficiency and increasing capacity. Walk-away automation with the 9640A Series performing the majority of tests enables operators to carry out additional value-adding tasks rather than wasting time waiting for frequent system setup changes.


What’s new?

New features included in the 9640A Series:

  • 9640A-LPNX model improved phase noise
    Reduced close-in phase noise and specifications to 1 Hz offsets.

  • Improved level accuracy and attenuation
    Specifications for better test uncertainty ratios against the most demanding workloads.

  • Optional integrated 50 MHz frequency counter
    Reducing the number of instruments needed in an RF calibration system in the lab or onsite for UUT frequency reference testing.

  • Extended leveled sine frequency setting resolution
    An enhanced mode with 10 uHz resolution at all frequencies, giving a maximum display and setting resolution of 4.023 999 999 999 99 GHz.

  • Leveled sine minimum output frequency of 1 mHz
    Replacing a function generator in many multipurpose calibration systems, enhancing the 9640A Series versatility.

  • External phase modulation
    Also with 1 MHz bandwidth for phase and frequency modulation.

  • Narrow range-locked sweep
    Enhanced resolution frequency sweep with new phase and amplitude continuous, range locked, narrow channel sweep.

New accessory:

  • 9600FLT 1 GHz wide offset phase noise filter
    Bandpass filter reducing high offset frequency noise levels for spectrum analyzer calibration 1 GHz phase noise tests.


Summary specifications


Frequency specifications

Level specifications 
(50 Ω output, see extended 
specifications for 75 Ω)


1 mHz to 4 GHz

-130 to +24 dBm to 125 MHz, 
14 dBm at 4 GHz (leveled)


10 uHz

0.001 dB


0.05 ppm + 5 uHz

Down to -48 dBm 
0.03 dB to 100 kHz, 0.05 dB to 128 MHz, 0.5 dB at 4 GHz 

10 MHz to 128 MHz
0.05 dB to -48 dBm, 0.1 dB to -84 dBm, 0.7 dB at -130 dBm



0.02 dB to 55 dB, 0.15 dB at 110 dB



≤500 MHz: ≤1.1, 
≤1 GHz: 1.2, ≤3 GHz: 1.3, 
≤4 GHz: 1.4

Harmonics and spurious

–60 dBc harmonics, –70 dBc spurious to 1 GHz

Phase noise at 1 GHz

9640A: –122 dBc/Hz, typical, at 10 kHz offset 
9640A-LPNX: –138 dBc/Hz, typical, at 5 kHz to 100 kHz offset


AM, FM, PM, internal and external. Frequency pull and external leveling.

Frequency sweep

1 mHz to 4 GHz. Linear or Logarithmic. Stop-Start or Center-Span.

Frequency counter

Optional internal 50 MHz frequency counter


Operating: 0 °C to 50 °C, 23 °C ± 5 °C for specified performance 
Storage: -20 °C to +70 °C

Standard interfaces

IEEE488.2 (GPIB)

GPIB command emulation

9640A, 9640A-LPNX: HP3335 
9640A-LPNX + Opt 8662/8663 GPIB: HP3335, HP8662A, HP8663A

Calibration documentation

17025 accredited report of calibration included

Dimensions (HxWxD)

146 mm x 433 mm x and 533 mm (5.8 in x 17.0 in x 21.0 in) Industry-standard 19 in (483 mm) rack mounting when fitted with Y9600 rack mounting kit


18 kg (40 lbs)

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