1257 User Manual
SCPI Command Basics 5-24
EADS North America Defense
Test and Services, Inc.
©
2001
TRIGGER:SOURCE?
will return the reply
IMM
NOT
IMMEDIATE
Boolean Parameters
Boolean parameters represent a single binary condition that is
either true or false. The 1257 accepts "OFF" or "0" for a false
condition. The 1257 accepts "ON" or "1" for a true condition. The
following command uses a boolean parameter:
[:ROUTe]
:MONitor
[:STATe] { OFF | ON | 0 | 1 }
The following commands turn the monitor OFF:
ROUTE:MONITOR:STATE OFF
ROUTE:MONITOR:STATE
0
MON
OFF
MON
0
The following commands turn the monitor ON:
ROUTE:MONITOR:STATE ON
ROUT:MON:STAT
ON
MON
1
When Boolean parameters are queried, the 1257 always replies
with a “1", if the state is on, or “0", if the state is off. The keywords
“ON” and “OFF” are NOT returned in the reply to ROUTE:
MONITOR:STATE?, or any other query.
Command Input
Buffer
The 1257 uses a command buffer to store commands sent either
through the RS-232 or GPIB interfaces. The input buffer is 1024
characters in length.
If the input buffer fills to capacity and the GPIB interface is the
active interface, the NRFD signal is asserted on the GPIB bus.
This indicates to the system controller that the 1257 is not able to
accept more data until it parses existing commands and clears
space in the input buffer.
