9
Cross channel trigger
Operating modes:
Either channel can be triggered by the other.
Sources:
Carrier, Modulation, Burst, Trigger, Sweep.
Outputs
Main Outputs
Output Impedance:
50
Ω
Amplitude:
20mV to 20Vp
−
p open circuit (10mV to 10Vp
−
p into 50
Ω
). Amplitude can be
specified open circuit (hi Z) or into an assumed load of 1
Ω
to 10k
Ω
in Vpp,
Vrms or dBm.
Amplitude Accuracy: 2% ±1mV at 1kHz into 50
Ω
.
DC Offset Range:
±10V. DC offset plus signal peak limited to ±10V from 50
Ω
.
DC Offset Accuracy:
Typically 3% ±10mV.
Resolution:
3 digits or 1mV for both Amplitude and DC Offset.
Sync Outs
Multifunction output user definable or automatically selected to be any of the following:
Carrier Waveform
Sync:
Sine/Ramp/
Pulse
A square wave with 50% duty cycle at the waveform frequency.
Square
A square wave with same duty cycle as the main output at the
waveform frequency.
Arbs
A square wave with 50% duty cycle at the waveform frequency.
The sync is a TTL high when the first point of the waveform is
output.
Noise
No sync associated with noise.
PRBS
A positive pulse which is 1 PRBS bit rate wide at the beginning
of the PRBS sequence
Modulation Sync:
AM/FM/PM/
PWM/SUM
A square wave with 50% duty cycle referenced to the internal
modulation waveform when modulation source is internal, or a
square wave referenced to the carrier waveform when
modulation source is external. No sync is associated with noise
as the modulation source.
FSK
A square wave referenced to the trigger rate. The sync is a TTL
high when hop frequency is the output frequency and TTL low
when carrier frequency is the output frequency for positive slope
and vice versa for negative slope.
BPSK
A square wave referenced to the trigger rate. The sync is a TTL
high when the hop phase is the output phase and TTL low when
carrier phase is the output phase for positive slope and vice
versa for negative slope.
Burst Sync:
A square wave that is a TTL high when the burst begins and a TTL low when
burst is completed.
Trigger:
Selects the current trigger signal. Useful for synchronizing burst or gated
signals.
