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HOME Test and Measurement T&M Miscellaneous Modules Agilent HP 83485A

Agilent HP 83485A

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  • $375

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Description of Agilent HP 83485A

Categories: T&M, Miscellaneous Modules

Manufacturer: Keysight Technologies (Agilent HP)

Model: 83485A

Condition: Used

AGILENT 83485A 20 GHz Electrical/20 GHz Optical Plug-In Module - Calibration only

Product specifications of Agilent HP 83485A (From Used-Line T&M Specifications)

  • Launch Date Jan-2049
  • Alternative 86105B 15 GHz optical / 20 GHz electrical module
  • Status Discontinued by Manufacturer

The 83485A is a plug-in module with a 20 GHz optical and a 20 GHz electrical channel that is compatible with the Agilent 83480A and 86100A/B/C mainframes.

Each channel of the 83485A has two selectable bandwidth settings. In the lower bandwidth modes of 12.4 GHz, oscilloscope noise performance is excellent, while the 20 GHz mode allows greater fidelity for high speed signals.

The 83485A is also a calibrated SONET/SDH reference receiver that is measured to comply to ITU-TS (formerly CCITT) G.957 and Bellcore GR-253-CORE frequency response requirements for transmitter compliance testing. By either pressing a front-panel button or issuing an HP-IB command, a fourth-order Bessel-Thomson filter is inserted into or removed from the measurement channel by a very repeatable HP microwave switch. The switch removes the potential variability and the time wasted by manually inserting and removing the filter when alternating between high-fidelity waveform characterization and SONET/SDH compliance testing.

The purpose of the plug-in module is to provide measurement channels, including sampling, for the mainframe. The plug-in module scales the input signal, sets the bandwidth of the system, and allows the offset to be adjusted so the signal can be viewed. The output of the plug-in module is an analog signal that is applied to the ADCs on the acquisition boards inside the mainframe. The plug-in module also provides a trigger signal input to the time base/trigger board inside the mainframe.

  • Bandwidth on electrical or optical channel: 12.4 GHz and 20 GHz
  • Electrical channel:
    • Transition time: 28.2 ps (12.4 GHz), 17.5 ps (20 GHz)
    • Maximum RMS noise: 0.5 mV (12.4 GHz), 1.0 mV (20 GHz) 
    • Scale factor (8 divisions): 1 mV/div minimum, 100 mV/div maximum
    • dc Offset range: ±500 mV
    • Input impedance (nominal): 50 Ω
    • Dynamic range/maximum specified input power: ±400 mV relative to channel offset
    • Maximum safe input: ±2 V + peak ac (+16 dBm)
  • Optical channel:
    • Transition time: 40 ps (12.5 GHz), 25 ps (20 GHz)
    • Maximum RMS noise: 12 µW (12.4 GHz), 25 µW (20 GHz) 
    • Scale factor (8 divisions): 20 µW/div minimum, 500 µW/div maximum
    • dc Offset range: +1 to -3 mW
    • Average power monitor specified operating range: -30 dBm to +3 dBm (1 µW to 2 mW)
    • Dynamic range/maximum specified input power: 2 mW 
    • Maximum safe input: 10 mW peak
    • Calibrated wavelengths: 1310 nm and 1550 nm
    • Wavelength range: 1200 - 1600 nm
  • 2.5 GHz trigger channel
  • Switchable SDH/SONET filter for transceiver compliance testing
  • Display resolution: 256 points
  • 3.5 mm male connectors on electrical measurement channel and trigger channel
  • One probe power connector
  • One auxiliary power connnector
  • Optical channel has an HP universal adapter for 9/125 µm single-mode fiber input

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