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The HP 3780A Pattern Generator/Error Detector is a comprehensive error measuring set in one portable package for use in manufacturing, field trials, commissioning and maintenance of digital transmission terminal and link equipment. The instrument measures binary errors and code errors in digital transmission equipment operating at rates between 1 kb/s and 50 Mb/s. Frequency offset generation and measurement are provided at the standard PCM/TDM transmission rates. A range of standard PRBS test patterns and automatic pattern recognition/synchronisation are provided for simple performance checks. It also has flexible WORD generation and zero substitution to explore regenerator timing recovery performance and detect systematic errors. Binary clock and data or ternary coded data interfaces can be selected with automatic equalisation at 2, 8 and 34 Mb/ s on the receiver. Results are displayed as error COUNT or BER over a range of gating periods, and can be logged or presented graphically on an external printer. Option 232: RS-232 printer port replaces BCD printer and plotter outputs. Option 100: internal fixed rates of 2048, 8448 & 34368 kb/s; HDB3/HDB2 ternary coding. Option 101: internal fixed rates of 1544, 6312 & 44736 kb/s; B6ZS/ B3ZS ternary coding. Option 102: internal fixed rates of 1544, 6312 & 3152 kb/s; B6ZS/ B3ZS ternary coding. Option 103: internal fixed rates of 2048, 8448 & 34368 kb/s; 2^23 -1 PRBS replaces 2^9 -1; HDB3 ternary coding. Option 104: as option 103 but with Siemens 1.6 mm connectors.
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