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The HP 37711A T1/Datacom Test Set tests at T1 (DSX and line), RS-232, RS-449 (balanced), and V.35 interfaces. The instrument consists of the HP 37701A T1 tester, plus the HP 15901A datacom module (available separately for existing HP 37701A users). Datacom Interfaces: RS-232, RS-449, V.35, DTE, or DCE. Data Rates: 600 b/s to 1.544 Mb/s (synchronous: built-in synthesizer); 50 b/s to 19.2 kb/s (asynchronous). RS-232 Breakout: Patch point, monitors, voltage sources, and switches. RS-449/V.35: Activity indicators on data, clock, and control circuits. Test Patterns: 63,511,2047, 2^15 -1 PRBS, QRSS, (all invertible); all 1s, 1010 ... , 24-bit word, FOX message. Measurements: Errors, BER, blocks, block errors, BLER, error seconds, % EFS, clock slips, alarms, Tx and Rx frequency, G.821 analysis. Control-Circuit Timing: Measures times between selectable start/stop events; timing range 1s, resolution 0.1 ms. Transition Diagrams: For MON, RTS, CTS, DTR, DSR and DCD
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