Appendix
126
Remote Interface
Operation
:OUTPut[1|2]:STRobe:VOLTage {TTL|ECL|SYM4vpp}
3.2.18 Trigger Output
81150A: One trigger output for each channel is provided on the front-panel.
81160A: The ‘Logical Trigger Signal’ is an internally generated signal that
can be routed to the BNC connector of Sync Out A or Sync Out B. For the
two channel instrument, the ‘Logical Trigger Signal’ is generated for both,
channel 1 and channel 2. See chapter 3.2.19 ‘Sync Output’ for more
details.
If modulation is enabled (AM, FM, PM, PWM), the Trigger Output has the
frequency of the unmodulated carrier waveform with 50% duty cycle. For
FSK modulation the Trigger Output outputs the same frequency as the data
output – it alternates between the two frequencies.
If noise is selected the Trigger Output is constant Low if the trigger mode is
continuous or gated. If the trigger mode is triggered, then Trigger-Out will
generate a 4.16 ns for 81150A (1.5 ns for 81160A) pulse when the noise
generation is being reset to the start of the noise sequence.
For all other modes of operation the trigger signal (Trigger Out) marks the
start of each waveform period.
The Trigger Out Level can e selected on the Trigger/Mode screen.
To display the Trigger/Mode screen press either the ., , or
key (depending on the trigger mode being used).
Then, press the Trigger Out softkey to choose from TTL/ECL at Trigger Out.
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