User`s manual

Comments
• Query is Software Readback: The [ROUTe:]OPEN? command
returns the current software state of the channel specified. It does
not account for relay hardware failures.
Example Query Multiplexer Channel Open State
OPEN (@100,247) 100 opens channel 00 of
multiplexer #1; 247 opens channel
47 of multiplexer #2
OPEN? (@247) Query channel 247
SCAN [ROUTe:]SCAN <channel_list> defines the channels to be scanned. The
channel_list is in the form (@ccnn), (@ccnn,ccnn), or (@ccnn:ccnn)
where
cc = card number (00-99) and nn = channel number (00-47).
Parameters
Parameter Name Parameter Type Range of Values
<
channel_list>
numeric cc00 - cc47
Comments
•
Defining the Channel List: When executing [ROUTe:]SCAN, the
channel list is checked for valid card and channel numbers. An error
is generated for an invalid channel list.
• Scanning Operation: With a valid channel list,
INITiate[:IMMediate] starts the scanning cycle and closes the first
channel in the channel list. Successive triggers from the source
specified by TRIGger:SOURce advances the scan through the
channel list.
• Stopping Scan: See the ABORt command.
• Closing the DT Tree Switch: See the
[ROUTe:]SCAN:MODE RES command.
• Related Commands: TRIGger, TRIGger:SOURce.
• *RST Condition: All channels open.
Example Scanning Using External Devices
The following example shows how to scan channels using the Agilent
E1300/E1301 Mainframe via GPIB and an Agilent 3457A Digital
Multimeter. This example uses the mainframe "Trig Out" port to
synchronize the multiplexer module in a switchbox to the multimeter. The
trigger pulse form the port triggers the multimeter for a measurement. See
chapter 3 for typical user connections to the multiplexer.
The computer used in the example is an HP Series 200/300 with BASIC as
the program language. The computer interfaces with the mainframe over
GPIB. Assumed is an GPIB select code of 7, an GPIB primary address of
09 and 22 for the Agilent E1300/E1301 Mainframe and Agilent 3457A
Multimeter, respectively, and an GPIB secondary address of 14 for the
switchbox.
10 OUTPUT 722;"TRIG EXT;DCV" Sets multimeter to external trigger
and to measure dc volts
Chapter 5 Agilent E1346A Multiplexer Command Reference 51