Remote Testing - Keysight N432A Service Manual

2 Calibration Procedures
Real time clock (RTC) battery
The RTC battery provides power for the real-time clock circuitry on the
motherboard when the N432A is powered off.
During the RTC battery test, the RTC battery power level is determined by
converting the ADC value of the RTC battery power level read from the FPGA, to
voltage level. If the battery power level is less than a pre specified threshold
(threshold to be defined later), the test will fail. An error will be logged in the error
list if the test fails.
V
An array of tests on the voltage metering for V
self-test circuit will output a set of known DC voltages to the bridge which are
then compared to those measured by the N432A metering. This is a user-invoked
self-test.

Remote testing

To perform a remote instrument self-test, the IEEE-488.2 common command
*TST?
codes:
– 0 – no tests failed
– 1 – one or more tests failed
The communications assembly is tested implicitly, in that the command will not
be accepted or return a result unless the remote interface is functioning correctly.
When the
place, the name of the test is listed on the screen. While a test is running, the
message Testing... appears beside the name of the test. As each stage of the test
completes, the message Testing... is replaced by either Passed or Failed.
36
, V , V paths
RF COMP 0
is used. This command runs a full self-test and returns one of the following
command is executed, the screen is cleared. As each test takes
*TST?
, V , and V . The built-in
RF COMP o
Keysight N432A Service Guide