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Chapter 3 Features and Functions
Output Configuration
SYNC Signal
A sync signal output is provided on the front-panel SYNC terminal.
All of the standard output functions (except dc and noise) have an
associated sync signal. For certain applications where you may not want
to output the sync signal, you can disable the SYNC terminal.
The SYNC terminal can be enabled/disabled from the remote interface only.
• By default, the sync signal is routed to the SYNC terminal (enabled).
• When the sync signal is disabled, the output level on the SYNC
terminal is indeterminate (it might be a
• For sine, square, triangle, and ramp waveforms, the sync signal is a
"high" when the waveform's output is positive, relative to zero
TTL
volts (or the dc offset value). The signal is a
output is negative, relative to zero volts (or the dc offset value).
• For arbitrary waveforms, a momentary
output which corresponds to the first downloaded point in the waveform.
• For AM and FM, the sync signal is referenced to the modulating
signal (not the carrier). A momentary
output at each zero-crossing point of the modulating signal.
• For the triggered burst mode, a
specified number of cycles is output (for the duration of the burst).
After the specified number of cycles has been output, the sync signal
goes "high" until the next burst.
• For the external gated burst mode, the sync signal is a
when the output is positive, relative to zero volts (or the dc offset
value). The signal is a
to zero volts (or the dc offset value).
• For FSK, a momentary
transition to the "hop" frequency.
• For frequency sweeps, the sync signal is a
sweep (when the start frequency is output) and is a
end of the sweep (when the stop frequency is output).
• Remote Interface Operation:
OUTPut:SYNC {OFF|ON}
68
"high" or a
TTL
TTL
"high" pulse (> 200 ns) is
TTL
"high" pulse (> 200 ns) is
TTL
"low" signal is output while the
TTL
"low" when the output is negative, relative
TTL
"high" pulse (> 200 ns) is output on the
TTL
TTL
Setting is stored in volatile memory.
"low").
TTL
"low" when the
"high"
TTL
"low" at the start of the
"high" at the
TTL
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