Model 8551 is a pulse/function generator, which has performance characteristics similar to the Model 8550. In addition, this instrument offers pulse and ramp waveforms as well as their complements. Model 8551 also provides an accurate control over pulse parameters and pulse transition times.

• Product NSN # 6625-01-513-1728RH
  Improved and only replacement to HP 8116A.
  Three instruments in one: Pulse Generator, Function Generator, and Phase Generator (PLL)
  Popular output waveforms including sine, triangle, square, pulse and ramp
  Pulse output waveforms include: normal pulse, fixed duty cycle pulse, and pulse complement
  Control input is available for pulse width modulation (PWM), AM, VCO, and FM
  Changing pulse levels in less than 6ns
  Linear transition times are independently programmable for trailing and leading edges
  Auto calibration and built-in self diagnostics
  30 storable, non-volatile, front panel set-ups
  Standard GPIB interface

Versatility
Tabor generators are reliable and easy to operate. Rapid, repeatable testing is assured by the user programmed non-volatile memory. The variable rise and fall times may be independently adjusted within common ranges. Linear and logarithmic sweep functions are not available on this model. Output waveforms may be gated, triggered, or may generate a burst of pre-selected number of cycles. The generator also provides a number of externally controlled modes, including VCO, FM, AM, and PLL. Extremely broad frequency and amplitude limits permit usefulness in a variety of complex applications. Parameters are digitally set over exceptionally wide ranges:

Self-Calibration
Front panel calibration, even by inexperienced persons, has made maintenance and troubleshooting extremely easy. Output waveform parameters are compared to internal references and are stored together with correcting factors in special tables for later use. If the self-calibration routine fails to successfully complete, the generator produces a failure list that can be evaluated, anytime, either from the front panel or through GPIB reporting query. The self-calibration capability restores full accuracy potential – even at extreme temperatures (0-50C).

Phase Locked Loop (PLL)
The phase lock feature automatically locks the 8551`s output to external signals at frequencies up to 60 MHz and voltages up to 40 Vp-p. Phase offset is programmable with 1 resolution, and accuracy of 3.

IEEE-488.2 Compatibility
The IEEE-488 standard greatly simplifies interconnection of programmable instrumentation. It clearly defines mechanical, electrical and protocol specifications. The IEEE-488.2 standard, has significantly improved definition of data formats, status reporting, and error handling. This new standard goes further and defines a set of common commands and common queries for easy and goes further and defines a set of common commands and common queries for easy instrument interchangeability between instruments made by different manufacturers. Models 8550 and 8551 fully comply with IEEE-488.2.
The IEEE-488.2 standard, has significantly improved definition of data formats, status reporting, and error handling. This new stand and goes further and defines a set of common commands and common queries for easy and goes further and defines a set of common commands and common queries for easy instrument interchangeability between instruments made by different manufacturers.

Models 8550 and 8551 fully comply with IEEE-488.2.

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