User`s manual

Agilent E8462A Relay Multiplexer Command Reference 95
- 9201 disconnects analog L1 from the low side of the channel connection.
- 9202 disconnects analog G from analog L1. This is needed to disconnect the
Guard of an Agilent E1411 from the Low connection.
- 9203 disconnects analog H2 from the high side of the second pair of a four-wire
connection.
- 9204 disconnects analog L1 from the low side of the second pair of a four-wire
connection.
*OPC? Command: Using the *OPC? command after the OPEN command in your
programs will ensure that the channel
OPEN command has executed prior to
performing the next function (measure, read, and so on). This programming practice
is highly recommended.
Related Commands:
[ROUTe:]CLOSe, [ROUTe:]OPEN?, [ROUTe:]SCAN
*RST Condition: All multiplexer channels are open.
Example Opening Multiplexer Channels
This example opens channel 0 in card #1; and channel 67 in card #2 of a two-module
switchbox. Both modules are in two-wire mode.
OPEN (@100,267)
100 opens channel 0 of card #1, and 267
opens channel 67 of card #2.
[ROUTe:]OPEN?
[ROUTe:]OPEN? <channel_list> Returns the current state of the channel(s)
queried. Channel_list has the form
(@ccbnnn) (see [ROUTe:]OPEN for definition).
The command returns "1" if channel(s) are open or returns "0" if channel(s) are
closed.
Comments Query is Firmware Readback: The ROUTe:OPEN? command returns the current
firmware state of the channel(s) specified. It does not account for relay hardware
failures. A maximum of 128 channels at a time can be queried for any switchbox.
Three/Four-Wire Modes (WIRE3/WIRE4): When configured for three- or
four-wire modes, the upper bank pair (4-7) channels cannot be queried. If an attempt
is made to query the upper bank pair (4-7) channels, an error will be generated.
Example Query Channel Open State
This example opens channel 0 in card #1; and channel 67 in card #2 of a two-module
switchbox and queries the channels open state. Since the channels are programmed
to be opened "1,1" is returned.
OPEN (@100,267)
100 opens channel 0 on card #1, and 267
opens channel 67 on card #2.
OPEN? (@100,267)
Query state of channel 0, card #1; and
channel 67, card #2.