Keysight-Agilent 4937A

The Agilent-HP 4937A contains a set of voiceband transmission tests -- level/frequency measurement, noise, and 2- and 4-wire return loss measurements. It also has the ability to seize and hold three types of E/M lines. In addition, the HP 4937A simulates signaling both from the central office and from the PBX at the network interface.
Features:
- Level/frequency 20 Hz to 110 kHz
- Noise and noise-to-ground
- Noise-with-tone and signal-to-noise
- Three-level impulse noise
- P/AR available as an option
- IEEE 743-1984 North American Measurement standard
- Transmit/receive connectors: WECO 310
- 100, 120, 220 240 Vac +5% -10%; 45-66 Hz operation; battery operation >3 hours with option

Keysight-Agilent 4937A datasheet & specifications