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68 E1442A Command Reference Chapter 3
Opening Channels: To open:
• a single channel, use [ROUTe:]OPEN (@ccnn)
• for multiple channels, use [ROUTe:]OPEN (@ccnn,ccnn)
• sequential channels, use [ROUTe:]OPEN (@ccnn:ccnn)
• a group of sequential channels, use [ROUTe:]OPEN
(@ccnn:ccnn,ccnn:ccnn)
• or any combination of the above
Opening Order: A list of channels will not all open simultaneously. The
order channels open when specified from a single command is not
guaranteed. Use sequential OPEN commands if needed.
Related Commands: [ROUTe:]CLOSe, [ROUTe:]OPEN?
*RST Condition: All Form C switch channels are open.
Example Opening Form C Switch Channels
This example opens channel 00 of a card number 1 Form C switch
module and channel 63 of a card number 2 Form C switch module in a
single switchbox.
23(1#
100 opens channel 00 of Form C
switch #1. 263 opens channel 63
of Form C switch #2.
[ROUTe:]OPEN?
[ROUTe:]OPEN? <channel_list> returns the current state of the channel
queried. The channel_list is in the form (@ccnn). The command returns
1 if the channel is in the NC state (C connected to NC) or returns 0 if the
channel is in the NO state (C connected to NO). If a list of channels is
queried, a comma delineated list of 0 or 1 values is returned in the same
order of the channel list.
Comments Query is Software Readback: The [ROUTe:]OPEN? command returns the
current state of the hardware controlling the specified channel. It does
not account for a failed switch element.
Example Query Form C Switch Channel Open State
23(1#
100 opens channel 00 of Form C
switch #1. 263 opens channel 63
of Form C switch #2.
23(1"#
Query channel 263