Hewlett Packard
3784A

The HP 3784A is a Portable Error Performance/Jitter Test Set, offering standard telecom interfaces at 704 kb/s, 2, 8 and 34 Mb/s.
In addition, it has binary TTL/ECL interfaces for measurements up to 50 Mb/s, using the internal clock synthesizer. RS-232 interface.
The HP 3784A is easy to use with measurement presets, automatic receiver setup and error performance pass/fail thresholds. Automatic jitter tolerance and transfer plotting routines are provided for fast accurate testing up to and beyond CCITT limits. Through-data mode allows jitter to be added to a structured signal for jitter tolerance testing of demultiplexers.

Please find a corresponding data sheet here.