HP 8712ET User Manual

7-6 ES User’s Guide
Front/Rear Panel
Connectors
If limit testing is turned off for 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 the Automating
Measurements User’s Guide Supplement for more
information.
USER TTL
IN/OUT This rear panel female BNC connector can be used in
three different ways. Define its use by pressing
, and then making the appropriate
selection.
• 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 the Automating Measurements User’s Guide
Supplement for more information.
• This connector can also be used with an external
switch to automate softkey presses. See
"User-Defined BEGIN Key Menu" and "Using Fast
Recall with a Switch" in the Automating
Measurements User’s Guide Supplement.
• Lastly, this connector can be configured for use as a
sweep out connector. When configured this way, the
output is driven high during a sweep.
Measurement
Channel 1
Measurement
Channel 2
Limit Test TTL
Output
Pass
Pass
Fail
Pass
Fail
Pass
High (pass)
Low (fail)
Low (fail)
SYSTEM OPTIONS
System Config
User TTL Config

HP 8712ET Specifications

General

Brand	HP
Model	8712ET
Category	Measuring Instruments
Language	English