Keysight E4990A - Page 314

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304
30
PORT D
STATUS
Port D status signal. This signal is changed to
the High level when the port D is configured to
output port. It is changed to the Low level
when the port is configured to input port.
31
/WRITE
STROBE
A output port write strobe signal. When data is
present (that is, output level changes) on any
of the output ports, this signal provides a
negative pulse.
32 +5V pull-up
Provides +5V DC power supply for external
instruments.
33
/SWEEP
END
A sweep completion signal. When measurement
(all sweeps of all channels) and data calculation
are completed, this signal provides a negative
pulse.
34 +5V
Provides +5V DC power supply for external
instruments.
35 /PASS FAIL
Each limit test's results signal. This signal
changes to the High level when limit test,
bandwidth test, or ripple test results return
FAIL. It changes to the Low level when all limit
test results return PASS.
36
/PASS FAIL
STROBE
Each limit test's results write a strobe signal.
When limit test result is present on /PASS FAIL,
this signal provides a negative pulse.
Pin 19 has 2 features: Port B6 and INDEX. This feature is
controlled by CONT:HAND:EXT:IND:STAT command.
Pin 20 has 2 features: Port B7 and READY FOR TRIGGER.
This feature is controlled by CONT:HAND:EXT:RTR:STAT command.
Other topics about Communication with External Devices
Inputting Outputting Data
•
Overview
• Specifying Signal Direction of Port
• Reading Data Input from Port