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The HP 37742A is a handheld 2-Mb/s test set with all the features normally found only in larger instruments. It is easy to use, with full 2-Mb/s transmission and reception, compatibility with CRC4 frame formats, and built-in monitor speaker. The HP 37742A is used by telephone companies, utilities, and end users for installation and maintenance of 2-Mb/s circuits. Measurements: Level, line attenuation, bit errors, code errors, frame errors, CRC errors. G.821 Analysis: For bit and frame-bit errors; error seconds, error-free seconds, severely errored seconds, degraded minutes, available seconds, unavailable seconds. Alarm Detection: Signal loss, AIS, frame loss, multi-frame loss, pattern loss, remote frame loss, remote multiframe loss, error ratio threshold exceeded. Transmitter Framing: PCM31, PCM30 (CAS), with or without CRC4 multiframe, unframed. Transmitter Test patterns: PRBS; 2^9, 2^11, 2^15, normal and inverted, fully programmable 8-bit word. Transmitter Error add: Bit, code, frame, CRC; alarm generation, signaling, and overhead bits setup.
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