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.
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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.
Binary errors: closed loop bit-by-bit detection on any pattern
produced by generator. excluding added zeros or alternating words.
Code errors: violations of coding rule detected on any pattern with AMI, HDB3, or HDB2 coding (optionally
AMI, B6ZS, or B3ZS).
Frequency offset: measurement of fractional offset of generator clock output from installed crystal rates.
Agilent / HP 3780A Features
- Binary and code error measurements
- Internal crystal clocks and clock recovery
- Clock frequency offset generation and measurement
- Ternary coded and binary Interfaces
- PRBS and WORD pattern generation and detection
- Printer and recorder outputs
Ask for HP 3780A detailed specification.