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HOME Test and Measurement Analyzers Communication Analyzers Marconi Instruments 2955B For Sale Marconi 2955B

Marconi 2955B

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Description of Marconi 2955B

Categories: Analyzers, Communication Analyzers

Model: 2955B

Condition: Used

Seller: Valuetronics International Inc

Marconi 2955B The 2955B is a communication analyzer from Marconi. A communication

The 2955B is a communication analyzer from Marconi. A communication analyzer is a superior type of electronic test equipment for physical layer, circuit, and new technology testing. Anyone in the business of testing data networks can use a communication analyzer for the measurement and monitoring of equipment.

Product specifications of Marconi 2955B (From Used-Line T&M Specifications)

  • Launch Date
  • Status Discontinued by Manufacturer

The 2955B radio communications test set combines all the instruments required for transceiver testing within a single unit. Designed for bench and field, the instrument is lightweight, portable, and can be operated from all standard AC supplies or vehicle supplies.

Facilities are provided for testing all types of AM, FM, and θM mobile radio equipment, including low power hand portables and mobiles using selective calling, full duplex radio telephones, digital pocket pagers, base station, and repeater equipment.

The 2995B contains 19 instrument functions for transceiver testing: RF power meter, RF frequency meter, modulation meter, RF signal generator, dual AF signal generators, AF frequency meter, AF voltmeter, 1 kHz AF distortion meter, S/N and SINAD meter, sequential tones encoder/decoder, DTMF encoder/decoder, digitally coded squelch (DCS) encoder/decoder, POCSAG digital pager encoder, and digital oscilloscope. The instrument also functions as an ATE system, or as a set of general purpose test equipment. An option provides a sensitive, selective input for the measurement of signals as low as 1 µV.

Operation of the test set is simple. Keys configure the instrument functions to test either a transmitter and receiver together in full duplex mode, or independently for simplex or semi-duplex operation. A large, clear CRT display provides all generated and measured information relating to a test, and a direct indication of controls in use. The CRT provides the flexibility for measurements to be presented in digital form for precise unambiguous readings, from which a hard copy printout can be made.

  • Comprehensive testing facilities for AM, FM, and θM transceivers to 1000 MHz
  • Full duplex facility tests radio telephones and crossband repeaters
  • Optional sensitive receiver for off-air transmitter monitoring
  • Sequential and revertive tones, DTMF and DCS encoders/decoders
  • Menu driven CRT display with 26 stores for recall of standard settings
  • Precision digital readouts and autoranging bar charts for rapid testing
  • Built-in self test and operator guide
  • System checking of simplex transceivers in less than three seconds
  • Operation from any standard AC supply up to 400 Hz, or vehicle supply
  • Digital scope with single shot for peak modulation setting
  • GPIB or RS232
  • High stability OCXO fitted

The following specifications represent a small selection of the functions of the 2955B.

  • RF signal generator
    • Frequency range: 0.4 MHz to 1000 MHz (usable to 1060 MHz)
    • Frequency resolution: 50 Hz to 530 MHz, 100 Hz to 1000 MHz
    • Output level range in Receiver mode: -135 dBm to -15 dBm (0.04 µV to 40 mV)
    • Output level resolution: 0.1 dB
    • Harmonics: <-20 dBc up to 1.5 MHz, -25 dBc up to 250 MHz, -20 dBc up to 1000 MHz
    • Spurious for carrier frequencies up to 88 MHz: Better than -45 dBc up to 110 MHz, <-35 dBc above 110 MHz
    • Spurious for carrier frequencies up to 960 MHz: <-60 dBc
    • SSB phase noise at 20 kHz offset: <‑110 dBc/Hz up to 500 MHz, <‑104 dBc/Hz up to 1000 MHz
    • VSWR: <1.2 up to 500 MHz, <1.3 up to 1000 MHz (N-type), <2.2 up to 1000 MHz (BNC)
    • Internal AM CW range: 1.5 to 400 MHz, usable from 400 kHz to 500 MHz
    • Internal FM CW range: 0.4 to 1000 MHz, usable to 1060 MHz
    • Internal phase modulation CW range: 0.4 to 1000 MHz
  • Digital storage oscilloscope
    • Frequency range: DC (or 3 Hz on AC) to 50 kHz
    • Voltage range: 10 mV/div to 20 V/div
  • RF power meter
    • Input range: 0.05 mW to 150 W
    • Watts or dBm units
    • Frequency range: 1.5 MHz to 1000 MHz, usable to 1060 MHz
    • Resolution: 1% full scale
    • VSWR: <1.2 up to 500 MHz, <1.35 up to 1000 MHz (N-type), <2.2 up to 1000 MHz (BNC)

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