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Interface
Characteristics
BNC Connector
Functions
Appendix A
TTL levels, except for analog output
Outputs
"Output 50/75 Ohm"
"Marker Out"
(This output is parallel-
terminated with 50
Inputs
"Ref/Sample In"
"Start Arm In"
"Stop Trig/FSK/Gate In"
NOTE: High impedance pulled up to +5 V through 4.7 K resistor.
External source must be able to sink 1 Ma.
- analog output 50
nominal; or open
- marker bits stored with arbitrary
waveforms
nominal)
- reference frequency
- waveform clock
- a pulse indicating each waveform
repetition
- a level change at the start and the
end of each burst of waveform
repetitions
- frequency change
- phase change
- external reference frequency
(40 MHz maximum)
- trigger source
(i.e., the waveform clock)
- start arm (enables waveform
clock for a burst of waveform
repetitions
- waveform clock stop (causes the
current waveform repetition to
be the last, until another Start
Arm)
- FSK Input
- waveform clock gate
Agilent E1445A Specifications
or 75
459
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