I
-
I
-
Front/Rear Panel
Connectors
1
Measurement Channel 1
1
Measurement Channel 2
1
limit Test
TTL
Output
1
Pass
Pass
Fail
Pass
High lpassl
Fail
low
(fail]
pass
low
lfaill
If limit testing is turned off on both measurement channels,
this connector also serves as a user-defined TTL input
and output that can be set and read from
IBASIC
or SCPI
(HP-IB). See Chapter 7,
“Automating Measurements,
n
for
more information.
USER
TI’L
IN/OUT
This rear panel female BNC connector can be used in three
different ways. Define its use by pressing (SYSTEM OPTIONS)
User
TTL
Goti
ig
, and then making the appropriate
selection.
l
The default use for this connector provides a bidirectional
open-collector TTL signal which can be set or read from
IBASIC
or SCPI (HP-IB). This is an open-collector signal
which you can drive low, but must not drive high, since
the analyzer also drives it. See Chapter 7, “Automating
Measurements,” for more information.
l
This connector can also be used with an external switch
to automate
softkey
presses. See
“User-Dellned
(BEGIN]
Key Menu” and “Using Fast Recall with a Switch” in
Chapter 7.
l
Lastly, this connector can be
conhgured
for use as a sweep
out connector. When configured this way, the output is
driven high during a sweep.
8-6
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