Open; Scan - HP E1343A User Manual

OPEN?

Comments
Example

SCAN

Parameters
Comments
Example
60 Relay Multiplexer Command Reference
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[ROUTe:]OPEN? < channel_list
The channel_list is in the form (@ccnn). The command returns
open or returns 0 if the channel is closed.
•
Query is Software Readback: The
current software state of the channel specified. It does not account for relay
hardware failures.
Query Multiplexer Channel Open State
OPEN (@100,215)
OPEN? (@215)
channel_list
[ROUTe:]SCAN <
channel_list is in the form (@ccnn), (@ccnn,ccnn), or (@ccnn:ccnn) where
cc = card number (00–99) and nn = channel number (00–15).
Parameter Name
< channel_list >
•
Defining the Channel List: When executing
is checked for valid card and channel numbers. An error is generated for an
invalid channel list.
•
Scanning Operation: With a valid channel list,
scanning cycle and closes the first channel in the channel list. Successive
triggers from the source specified by
through the channel list.
•
Stopping Scan: See the
•
Closing the AT, BT, and AT2 Tree Switches:
See the
[ROUTe:]SCAN:PORT ABUS
•
Related Commands:
•
*RST Condition: All channels open.
Scanning Using External Devices
The following example shows how to scan channels using the HP E1300/E1301
Mainframe via HP-IB and an HP 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.
> returns the current state of the channel(s) queried.
[ROUTe:]OPEN?
100 opens channel 00 of multiplexer #1;
215 opens channel 15 of multiplexer #2.
Query channel 215.
> defines the channels to be scanned. The
Parameter Type
numeric
[ROUTe:]SCAN
INITiate[:IMMediate]
TRIGger:SOURce
command.
ABORt
command.
,
TRIGger TRIGger:SOURce
1 if the channel is
command returns the
Range of Values
cc00-cc15
, the channel list
starts the
advances the scan