Teledyne ADFM Analog Output Module, Техническое руководство, Страница: 47 / 156

ADFM Test Procedures
5-4 Using BBTALK to Test the ADFM
BBTALK allows you to send direct commands to the ADFM. You may use
the following commands to further test the system.
5-4.1 Diagnostic Tests
The diagnostic test checks the major ADFM modules and signal paths. We
recommend you run this test before a deployment. If any test fails, call
MGD for further troubleshooting information.
a. Start BBTALK . Press the
End
key to wake the ADFM.
b. Type
CP
to clear the fault log.
c. Type
PC
. A message similar to the following should appear.
>pc
Transducer Communications: PASS
Recorder BIT (RT ): PASS
Modem (MO ): PASS
System Voltages (PT2): PASS
CPU RAM (PI ): PASS
Timing Card RAM (PI ): PASS
Demodulator RAM (PI ): PASS
Checksum Code/Tables (PT8): PASS
Receive Test (PT3): PASS
Transmit Test (PT4): PASS
Electronics Wrap Test (PT5): PASS
LPF Bandwidth Test (PT6): PASS
Clock Interrupt (PI ): PASS
Error Log:
Power Loss
Auto Restart Occurred
Transducer Communications Error
Self Tests Complete
Many users tell us their ADFM reports a FAIL condition during the self-
tests that check the ADFM’s “electronics wrap test.” In most cases, the
cause of the failure is external interference. A “noisy” environment, such as
in a lab usually causes this external interference. You can take a few simple
steps to find out if the FAIL condition is being caused by external interfer-
ence or by a problem with the ADFM.
The following procedure explains how to conduct the PC test to reduce the
likelihood of a false failure.
a. Turn off any nearby equipment (monitors, radios, etc.) that is not
needed to conduct the test.
b. The electronic housing case should be closed to help shield the circuit
boards from external electronic “noise.”
c. The ADFM transducer head must be immersed in water. Ensure there
are no air bubbles on the transducer faces.
ADFM Technical Manual (January 2000) page 5-3