Instruction manual

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
GPIB—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 GPIB 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.