ROUTe:CLOSe:EXCLusive
Syntax
ROUTe:CLOSe:EXCLusive (@<ch_list>)
Description
This command opens all channels on a multiplexer or switch module and then closes the specified channels. On the multiplexer modules, if any channel in a bank is defined to be part of the scan list, attempting to close another channel (including Analog Bus channels) within the same bank will result in an error. Channel closures in the other bank are allowed as long as no channels are part of the scan list; however, Analog Bus relay closures are not allowed.
Used With:
34921A through 34925A Multiplexer Modules
34931A through 34934A Matrix Modules
34937A through 34939A GP Switch Modules
34941A and 34942A RF Multiplexer Modules
34946A and 34947A Microwave Switch Modules
Parameters
|
Name |
Type |
Range of Values |
Default Value |
|
<ch_list> |
Numeric |
One or more channels in the form (@sccc). |
This is a required parameter |
Remarks
To protect the FET switches on the 34925A multiplexer module, only one channel per bank can be closed at a time. If multiple channels are specified, they will be opened/closed in succession to ensure break-before-make operation (the last channel closed in each bank will remain closed).
For the matrix modules (34931A, 34932A, 34933A and 34934A), the channel number represents the intersection of the desired row and column. For example, channel 2304 represents the intersection of row 3 and column 4 on the module in slot 2 (assumes two-wire mode). For more information, see the simplified schematics. For channel numbering information for the 34934A, see 34934A Channel Addressing.
Any channels specified by this command that were previously closed will remain closed when execution of the command is completed. The state of the channels during command execution however is not guaranteed (i.e. that a channel currently closed will remain closed during execution).
The 34923A, 34924A, 34933A, and 34934A modules use non-latching reed relays. Due to power dissipation issues, there is a limit to the number of relays that can be closed at a time on these modules (you cannot close all channels simultaneously). The mainframe can drive up to 40 coils at one time per slot on these modules (a single coil drives one channel relay or one Analog Bus relay). Note that when in the 2-wire mode (see SYSTem:MODule:WIRE:MODE command), two coils are required to drive each channel relay. An error will be generated if you attempt to close more than the maximum number of allowed channels.
In the 2-wire mode on the 34923A and 34924A multiplexers, no more than 20 channels can be closed simultaneously per module (up to 10 channels per bank). Note that Analog Bus relays count half as much as channel relays in that total. Therefore, with one Analog Bus relay closed, you can close up to a maximum of 19 channel relays.
In the 1-wire mode on the 34923A multiplexer, no more than 40 channels can be closed simultaneously per module (up to 20 channels per bank). Therefore, with one Analog Bus relay closed, you can close up to a maximum of 39 channel relays.
In the 2-wire mode on the 34933A matrix, no more than 20 channels can be closed simultaneously per module. Note that Analog Bus relays count half as much as channel relays in that total. Therefore, with one Analog Bus relay closed, you can close up to a maximum of 19 channel relays.
In the 1-wire mode on the 34933A matrix, no more than 40 channels can be closed simultaneously per module. Therefore, with one Analog Bus relay closed, you can close up to a maximum of 39 channel relays.
In the 1-wire mode on the 34934A matrix, the maximum number of channels (relays) per slot that may be closed on the module is 64. For 2-wire mode, the maximum number is 32. This includes any previously closed channels and row protection relay FIXed mode (see SYSTem:MODule:ROW:PROTection).
The RF Multiplexer modules (34941A, 34942A) and Microwave Switch modules (34946A, 34947A) will not respond to the ROUTe:OPEN command (an error is generated). To "open" a channel on these modules, send the ROUTe:CLOSe:EXCLusive command to a different channel in the same bank.
If this command closes a channel currently being monitored (see ROUTe:MONitor[:CHANnel] command), the Monitor operation will be disabled on that channel.
This command does not apply to channels on the 34945A Microwave Switch/Attenuator Driver.
To open and close the output relays on the 34951A Isolated DAC Module, use the OUTPut[:STATe] command.
Examples
The following command opens all channels and then closes only channels 3 and 13 in slot 1 (no Analog Bus connections are made).
ROUT:CLOS:EXCL (@1003,1013)
The following command opens all channels and then closes channel 203 on the matrix module in slot 7 which connects Row 2 to Column 3 on Matrix 1.
ROUT:CLOS:EXCL (@7203)