Product Description:
The DG645 is a versatile digital delay/pulse generator that delivers precisely defined pulses at repetition rates up to 10 MHz. The instrument offers several improvements over the old design - lower jitter, higher accuracy, faster trigger rate and more output. The DG645 also has Ethernet, GPIB, and RS-232 interfaces for computer or network control of the instrument.
All digital delay generators measure the time interval by counting the period of a fast clock (usually 100 MHz). Most digital delay generators also have a shorter programmable analog delay to achieve a finer time interval than the clock period. Unfortunately, if the trigger is in phase with the clock, a timing indeterminancy clock cycle (typically 10 ns) may occur.
The DG645 eliminates timing uncertainty by measuring the timing of the trigger relative to the internal clock and compensating for analog delays. This method reduces jitter by about 100× and allows the internal rate generator to operate at any rate, not just a submultiple of the clock frequency.
Features:
4 pulse outputs
8 delayed outputs (optional)
Less than 25 ps rms jitter
Trigger rate up to 10 MHz
Exact rate generator
Fast transition time
Ovenized or Rb time base (optional)
Ethernet, GPIB and RS-232