Agilent 3770B Telephone Line Analyzer (HP 3770B)

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Agilent 3770B Telephone Line Analyzer (HP 3770B)

Agilent 3770B

Telephone Line Analyzer (Agilent / HP 3770B)



The Agilent / HP 3770B is designed for audio data line characterization to CCITT standards. The HP 3770B makes, in one combined unit, all of the routine maintenance measurements listed in CCITT Recommendation M.1060 for high speed data lines. The HP 3770B measures group delay, attenuation distortion, and absolute level in the frequency range 200 Hz to 20 kHz. It has automatic ranging, zeroing, and synchronization, with simultaneous LED read-out of measurement result and frequency. The sender and receiver are combined in a single, rugged, portable unit.

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The HP 3770B also measures weighted noise, noise-with-tone and impulse noise. A crosstalk measurement is available as an option. Further, an optional slave facility for group delay and attenuation distortion measurements allows the measurement results for both directions of transmission on a 4-wire circuit to be displayed at one end of the circuit. The measurements in both directions can be controlled from one end of the circuit, leaving the slave unit unattended.

The HP 3770B has X-Y recorder outputs to enable a permanent swept record of the measurements to be made. A suitable portable X-Y recorder can be supplied as an option. Pre-printed graph paper showing CCITT limits for group delay and attenuation distortion measurements can also be supplied.
The instrument also has a built-in telephone facility to allow voice communication in a 2 or 4 wire mode over the line or lines under test. An integral loudspeaker allows the operator to monitor either the receiver input or sender output.

Agilent / HP 3770B Features

  • Compatible with CCITT Recommendation 0.81
  • Makes all the maintenance measurements listed in CCITT Recommendation M.1060
  • X-Y recorder output
  • Built-in telephone facility.

Ask for Agilent 3770B detailed specification.