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Chapter 2 Service
Troubleshooting the Counter
2-48 Assembly-Level Service Guide
2
You can also specify that failure messages be sent to a printer, the RS-232,
and the HP-IB—if in talk-only (
TST PRINT: ON
or
OFF
).
There are 13 choices for the
TEST:
menu item. They are listed and
described in the following text.
TEST: ALL?
—run all tests, except display, keypad and printer
tests.
DISP?
—illuminate the indicators and vacuum-fluorescent
display (VFD) segments. Note, this test is not
available if
TEST LOOP:
is ON.
TEST LOOP:
must
be OFF.
CPU?
—test processor(s).
ROM?
—checksum the ROM.
RAM?
—test RAM.
EEPROM?
—checksum the EEPROM, which is used for
non-volatile memory.
HP-IB?
—test HP-IB chip.
QSPI?
—test serial hardware control loops.
FPGA?
—internally measure the timebase to test count
circuitry.
FR END?
—check front end circuits, either by swinging trigger
levels (during power on test and ALL test) or
asking you to connect the timebase output to
channels 1 and 2 using a BNC-T connector to split
the signal.
MEAS?
—make a measurement, either by swinging trigger
levels (during power on test and ALL test) or
asking you to connect the timebase output to
channel 1.