User`s manual

Agilent E8462A Relay Multiplexer Command Reference 97
for valid card, and channel numbers. An error is generated for an invalid channel list.
64 Channel Limit: Individual channel numbers are limited to 64 due to the
maximum length of command in the current driver.
Select MODE with [ROUTe:]FUNCtion command. The
ROUT:FUNC command
is used to select the mode for the Agilent E8462A module. The interpretation of the
channel_list as to which relays will open or close depends upon the selected mode.
Control Relays: The SCAN command will automatically close and open the
appropriate control relays to connect the desired channels to the common terminals.
Scanning Channels:
• Any combination of the above channel lists is valid in one command.
Note Channel numbers can be in the channel_list in any random order but if the
sequential channel list is used (ccbnnn:ccbnnn), the second channel listed must be
greater than the first channel specified.
Multiple Scanning Operations NOT Allowed: The SCAN command does not
allow multiple scanning operations even when the module is configured to one of the
multiple MUX modes (e.g., WIRE1X2, WIRE2X2, WIRE4X2, WIRE1X4, etc.).
When the switchbox scans to the next channel, the previous channel will open
regardless of which MUX it is in. However, you can close channels in one MUX
and they will remain closed while you are scanning in another MUX.
Scanning Operation:
INITiate[:IMMediate] begins the scan of a valid channel list
and closes the first channel in the channel_list. Successive triggers from the source,
specified by
TRIGger:SOURce, advance the scan through channel_list.
Stopping Scan: See the
ABORt command.
Related Commands:
OUTPut, TRIGger
*RST Condition: All channels open.
Example Scanning Using External Device
See “Scanning Channels” in Chapter 2 for examples of scanning programs using
external instruments.
To Scan: Use this command:
a single channel
SCAN (@ccbnnn)
multiple channels
[ROUT:]SCAN (@ccbnnn,ccbnnn,...)
sequential channels
[ROUT:]SCAN (@ccbnnn:ccbnnn)
groups of sequential
channels
[ROUT:]SCAN (@ccbnnn:ccbnnn, ccbnnn:ccbnnn)