User`s manual

Frequency Sweep/
List Arming
The source which arms the frequency sweep or list is set with the
ARM:SWEep:SOURce command. The available sources are:
• BUS – The GPIB Group Execute Trigger (GET) command or the
IEEE-488.2
*TRG common command.
• HOLD – Suspend sweep or frequency list arming. Arm using
ARM:SWEep[:IMMediate].
• IMMediate – Immediate sweep or frequency list arming. If the sweep
or frequency list advance trigger (
TRIGger:SWEep:SOURce) is set to
TIMer, the sweep or list starts when the first start arm is received. If the
sweep or frequency list advance source is set to any other source, the
sweep or list starts when
INITiate[:IMMediate] is executed.
• LINK – The next valid start arm starts the sweep or frequency list.
• TTLTrg0 through TTLTrg7 – The VXIbus TTL trigger lines.
After the AFG is armed, the first frequency in the sweep or list is output.
Trigger signals output the remaining frequencies.
Frequency Sweep/
List Advance Trigger
The source which advances the sweep or frequency list to the next
frequency is set with the
TRIGger:SWEep:SOURce command. The
available sources are:
• BUS – The GPIB Group Execute Trigger (GET) command or the
IEEE-488.2
*TRG common command.
• HOLD – Suspend sweep or frequency list advance triggering.
Advance to the next frequency using
TRIGger:SWEep:IMMediate.
• LINK – The next valid start arm advances the sweep or frequency list.
• TIMer – The SOURce:SWEep:TIME and TRIGger:SWEep:TIMer
commands control the sweep and frequency list advance timing
(default source).
• TTLTrg0 through TTLTrg7 – The VXIbus TTL trigger lines.
Placing the AFG in the wait-for-arm state (
INITiate[:IMMediate]) puts the first
frequency in the sweep or list at the output. Trigger signals output the
remaining frequencies. Thus, for multiple sweeps or passes through the
frequency list, n-1 triggers are required for the first pass and n triggers are
required for all subsequent passes (n = number of points = number of triggers).
Immediate Arming
and Triggering
When the sweep and frequency list arming and triggering sources are set to
HOLD, the starting frequency is output when the AFG is set to the wait-for-arm
state (
INITiate[:IMMediate]). Once the sweep or frequency list arm is received
ARM:SWEep[:IMMediate], the sweep or list can be advanced when a sweep or
list advance trigger (
TRIGger:SWEep:IMMediate) is received.
Chapter 5 Arming and Triggering 201