Scanning Channels - HP E1368A/69A/70A User Manual

Scanning Channels

Sets number of Scanning Cycles
number
ARM:COUN < > sets 1 to 32767 scanning cycles per INIT
command.
Selects the Trigger Source
TRIG:SOUR defines the trigger source to advance the scan.
TRIG:SOUR? queries the current trigger source. Sources are:
BUS = Defines trigger source as a *TRG or HP-IB GET command
executed over the HP-IB. With TRIG:SOUR BUS, the scan list is
advanced for each *TRG or GET command received.
EXT = TRIG:SOUR EXT sets external triggering. The trigger source is a
(user supplied) input to the Event In BNC. Use a +5 V Negative-going
pulse to trigger.
HOLD = Prevents execution of triggers until trigger source is changed.
Can use TRIG command to trigger a switchbox set to TRIG:SOUR HOLD.
IMM = Sets immediate (internal) triggering. The scan list is automatically
advanced through the scan list. This is the default trigger mode.
Enables TRIG OUT Port
The Trig Out Port is shared by all instruments in the mainframe. With the
port enabled (OUTP ON), it generates an output trigger each time after a
channel closure for ANY switchbox in the mainframe. The Trig Out port
outputs a +5 V negative-going pulse.
Selects Continuous Scanning Cycles
Use INIT ON or INIT 1 to enable continuous cycles. INIT OFF or INIT 0
is fixed number of scans determined by the ARM:COUN command.
Selects the Channel List for Scanning
channel_list
SCAN < > defines channels to be scanned using trigger
source by TRIG:SOUR command.
Enables Scanning
Enables scanning for any trigger source and closes the first channel in
the channel list .
Advances Channel List
This command advances the channel list when the trigger source is
TRIG:SOUR BUS or TRIG:SOUR HOLD. Command not usable with
TRIG:SOUR EXT or TRIG:SOUR IMM.
Chapter 3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Scanning the Microwave Switch module channels consists of closing a set
of channels (connecting the 2 port to the C port) one channel at a time.
Single scan, multiple scans (2 to 32767), or continuous scanning modes are
available.
The command specifies the source to advance the scan.
TRIGger:SOURce
The command can be used to enable the HP E1300/E1301 or HP
OUTPut
E1405/E1406 "Trig Out" port. Figure 3-8 illustrates the scanning sequence.
Figure 3-8. Example: Scanning Commands
Using the HP E1368A/69A/70A Modules 39