Pacific Power Source UPC-32, Руководство по эксплуатации

Страница: 116 / 128

SECTION 9 DIAGNOSTICS
106
9 USER DIAGNOSTIC
S (cont’d)
9.5
PROBLEM
KEYS do not respond at all.
PROBABLE CAUSE:
Keyboard is locked
SUGGESTED CURE:
Press fn and EDIT keys to unlock keyboard ( 4.6.3.8 ).
9.6
PROBLEM
UPC does not respond to the GPIB
PROBABLE CAUSE #1:
The front panel display does not show the V/I meter display.
Remote access is not available during Edit or Setup
functions.
SUGGESTED CURE #1:
Press the CLEAR key to show the V/I meter display.
PROBABLE CAUSE #2:
GPIB device address incorrect or not unique
SUGGESTED CURE #2:
Verify that the device address selected within the GPIB
controller software matches the GPIB device address within
the UPC. There may only be a single device at each GPIB
address. Refer to (
4.6.3.3 ) (UPC STATUS display) to verify
or set the GPIB device address within the UPC.
You may also use the UPC STATUS display to verify
receipt of an INTERFACE CLEAR (IFC) by the UPC from a
GPIB controller. Refer to (
4.6.3.3 ) (UPC STATUS display)
for usage of the IFC field.
The "LAST DATA BYTE" field indicates the data byte
received by the UPC from the GPIB when the UPC was
addressed as a listener. Normally if a properly terminated
command string was received by the UPC, the LAST DATA
BYTE received should be 0Ah (Line Feed). The Line Feed
character or END signal (EOI) is the proper end of string
<eos> terminator. Refer to (
4.6.3.3 ) (UPC STATUS
display) for usage of the LAST DATA BYTE field.
Characters sent one at a time to the UPC via the GPIB
when the UPC is addressed to “listen” will be displayed in
the LAST DATA BYTE field.