Instruction manual

Chapter 4 Command Reference
Common Commands
Programming Guide 4-57
4
*TST? (Self-Test Query)
COMMAND *TST?
This query causes an internal self-test; the response indicates whether
any errors were detected When the self-test fails, error -330 is generated,
and other messages indicating specific failures are also placed in the
error/event queue.
QUERY RESPONSE • Numeric data transferred as ACSII bytes in <NR1> format.
• A response value of zero indicates the self-test has completed with no
errors detected, while a non-zero value indicates the self-test was not
completed or was completed with errors detected. The test failures that
can be detected and their corresponding bit numbers are shown below:
• The decimal weight of each bit is 2
n
, where n is the bit number.
Table 4-3. Self-Test Error Values
Bit Test Failed Bit Test Failed
0 Band 1 Signal Path 19 ROM
1 Band 1 Threshold 20 Unused
2 Band 2 RF Threshold 21 Front Panel Hardware
3 Band 2 IF Through Threshold 22 GPIB
4 Band 2 IF Heterodyne Threshold 23 EEPROM Instrument Configuration Data
5 Heterodyne Path 24 EEPROM Service Data
6 Through Path 25 EEPROM Saved User Settings Data
7 VCO 26 EEPROM Power Calibration Data
8 Counter Control FPGA 27 EEPROM Write
9 Power Measurement Hardware 28 EEPROM Power Correction Data
10-15 Unused 29 ADC
16 –12 V 30 Over Temperature
17 –5 V 31 Unused
18 +12 V