Discontinued product

R&S®CMD57 Digital Radiocommunication Tester

For production, installation and service of GSM, PCN and PCS base stations

Features

Transmitter measurements

  • Dynamic range >72 dB

    • Checking the power ramps and output spectrum of the BTS transmitter for compliance with the dynamic range specified by GSM

  • Measurement of power ramps

    • Checking the switching characteristics of the BTS transmitter

  • Phase and frequency error

    • Testing the modulation characteristics of the BTS transmitter including statistical function

  • Measurement of spectrum due to modulation or switching

    • Detecting interference to the BTS transmitter at adjacent frequencies, due to modulation or switching

Receiver measurements

  • Measurement of bit error rate (BER) via Abis/IEEE bus/RS-232-C interface, BTS loopback, CMD loopback, Abis interface

    • Testing the BTS receiver characteristics by adaptation to specific implementation in the BTS

  • Measurement of adjacent timeslot rejection with up to 50 dB higher level

    • Measuring the automatic gain control (AGC) of the BTS with high level difference between used and adjacent timeslot; simulation of different BTS receive levels

Other measurements

  • Echo test

    • Subjective test of speech quality with call established

  • Module test

    • Complete transmitter measurements even without signaling or time synchronization

  • Multifunction RF generator

    • Ideal for alignment of receiver modules

  • DC current and voltage measurement

    • Optimized for pulsed signals; replaces external measuring instruments

  • AF measurement facilities and 60 MHz frequency counter (optional)

    • Replaces external frequency counter; ideal for measuring reference frequencies

  • RF monitor with bandwidths of 30 kHz, 100 kHz

    • Replaces external spectrum analyzer

  • Simulation of fading effects

    • On request

Flexible use

  • Various BTS synchronization facilities as to time and frequency

    • Easy integration of measuring instrument into operational environment and problem-free adaptation to the specific synchronization signals of a BTS

  • Remote control via RS-232-C and IEC/IEEE bus

    • SCPI-compatible for easy generation of user-specific control programs

  • Low cost of ownership
  • Software update via interface

    • No need to open the instrument; simple download of the latest software version via the RS-232-C interface

Legal Information
©2008 ROHDE&SCHWARZ. All rights reserved.