Keithley 708B Reference Manual page 188

Models 707B and 708B Switching Matrix Reference Manual
Trigger source control
DDC
T0 or T1 No corresponding command
T2 or T3
T4 or T5 No corresponding command
T6 or T7
Send machine status word
The DDC U0 command provides information on several areas of the Model 707A or 708A instrument
in one long csv form. There is no one command to provide the same functionality as the U0
command, but the series of Model 707B or 708B commands shown in the following table can be used
to provide very similar information, without the need to parse a long, unwieldy string.
Send machine status word
DDC
U0
Error status word
This series of commands provides a descriptive list of error codes and error messages until no more
errors are present. For more information, see
Error status word
DDC TSP equivalent command
U1 count = errorqueue.count
for x=count,0,1 do
errorcode, message = errorqueue.next()
print(errorcode)
print(message)
end
Relay pointer operations
The DDC commands in the following table use relay setups as the Model 707B or 708B instrument
would use patterns.
The U2,n DDC command returns the channels that are closed in a format based on the DDC Gn
command. The corresponding command for this operation returns the channels contained in the
pattern as a csv list. There is no need to send a pattern to the relays. Operations that are to be done
to the channels of a pattern are done on the pattern correctly. For more information, see
functions and attributes
Relay pointer operations
DDC
U2,n
U3
707B-901-01 Rev. A / August 2010
TSP equivalent command
scan.trigger.channel.stimulus = trigger.EVENT_ID
scan.trigger.channel.stimulus =
digio.trigger[N].EVENT_ID
TSP equivalent commands
print(localnode.model)
print(scan.trigger.channel.stimulus)
print(display.getlastkey())
print(status.request_enable)
print(digio.readport())
(on page 5-5).
TSP equivalent command
channel.pattern.getimage(pattern)
No corresponding command
Description
Returns the model number
Returns trigger stimulus line
Returns the last key pressed
Gets SRQ Mask
Reads Digital I/O port
errorqueue functions and attributes
Description
Get the number of errors in the queue
For loop
Get next error codes
Print errorcode
Print error messages
End
Description
Point to stored relay setup
Send relay step pointer
Section 5: Remote commands
Description
Trigger on Talk
Trigger on GPIB Get
Trigger on X
Trigger on external trigger
(on page 5-10).
channel
5-27