
ES User’s Guide
7-5
Front/Rear Panel
Connectors
EXT TRIG
IN/OUT
This rear panel female BNC connector allows
triggering of a analyzer sweep by an external signal.
When the external signal is pulled to a high TTL level,
the analyzer is triggered to do either one complete
sweep, or sweep to the next (frequency) point. (The type
of sweep that gets triggered is determined by the
softkey selection made under the Trigger Source
menu.) When the external signal is pulled to ground,
triggering is inhibited. This connector also acts as an
output: during a sweep, the analyzer pulses a low TTL
level each time a (frequency) point is measured. This is
an open-collector signal which you can drive low, but
must not drive high, since the analyzer also drives it.
LIMIT TEST
TTL IN/OUT
This rear panel female BNC connector provides a
bi-directional open-collector TTL high signal. The
output goes high when the limit test passes. The output
goes low if the limit test fails. This is an open-collector
signal which you can drive low, but must not drive
high, since the analyzer also drives it.
NOTE
Limit testing can be set independently on each of the two measurement
channels. If both measurement channels are being used, and the limit
test is ON for both channels, both measurement channels must pass for
the output to go high. See the following table.
Summary of Contents for HP 8712ES
Page 8: ...viii ES User s Guide ...
Page 17: ...ES User s Guide 1 1 1 Installing the Analyzer ...
Page 34: ...1 18 ES User s Guide Installing the Analyzer Preventive Maintenance ...
Page 35: ...ES User s Guide 2 1 2 Getting Started ...
Page 52: ...2 18 ES User s Guide Getting Started Performing the Operator s Check ...
Page 53: ...ES User s Guide 3 1 3 Making Measurements ...
Page 135: ...ES User s Guide 4 1 4 Using Instrument Functions ...
Page 159: ...ES User s Guide 4 25 Using Instrument Functions Using Markers Figure 4 15 Delta Marker Mode ...
Page 165: ...ES User s Guide 4 31 Using Instrument Functions Using Limit Testing Figure 4 16 Limit Lines ...
Page 224: ...4 90 ES User s Guide Using Instrument Functions Using an External VGA Monitor ...
Page 225: ...ES User s Guide 5 1 5 Optimizing Measurements ...
Page 246: ...5 22 ES User s Guide Optimizing Measurements Measuring Devices with Long Electrical Delay ...
Page 247: ...ES User s Guide 6 1 6 Calibrating for Increased Measurement Accuracy ...
Page 281: ...ES User s Guide 7 1 7 Front Rear Panel ...
Page 306: ...7 26 ES User s Guide Front Rear Panel Line Module ...
Page 307: ...ES User s Guide 8 1 8 Hardkey Softkey Reference ...
Page 410: ...8 104 ES User s Guide Hardkey Softkey Reference Z ...
Page 411: ...ES User s Guide 9 1 9 Specifications ...
Page 469: ...ES User s Guide 10 1 10 Safety and Regulatory Information ...
Page 475: ...ES User s Guide 10 7 Safety and Regulatory Information Regulatory Information ...
Page 476: ...10 8 ES User s Guide Safety and Regulatory Information Regulatory Information ...
Page 477: ...ES User s Guide 11 1 11 Factory Preset State and Memory Allocation ...