HP E4418B Programming Manual page 299

OUTput Subsystem
OUTPut:TTL[1|2]:FEED <string>
Example
OUTP:TTL1:FEED "CALC1:LIM:UPP"
Reset Condition
On reset, the TTL output will represent an upper limit fail.
Query
OUTPut:TTL[1|2]:FEED?
The query command returns one of the strings shown in the table above,
indicating whether the asserted state of the TTL Output represents a fail
in the lower limit, upper limit or either limit for the selected window.
Query Example
8-6
OUTP:TTL1:FEED?
This command asserts TTL
Output 1 whenever there is an
upper limit fail in the upper
window.
This command queries whether
the asserted state for the upper
window TTL Output 1 represents
a fail in the upper limit, lower
limit or either limit.
HP E4418B/E4419B Programming Guide