Tektronix SCD1000 Service Manual page 299

Diagnostics
6-68
Digital Acquisition Test (Short)
(GPIB NUM: 15, TEST SYS: DIG)
This test checks the digital acquisition hardware without performing the
memory test. Use this test to ensure that any waveform information stored in
memory is not corrupted,
Error Messages
This test can retum all error messages given above except the first two.
Instrument Serial Bus Test
(GPIB NUM: 16, TEST SYS: DIG)
This test checks the serial bus by reading the test nodes from all three ana-
log-to-digital converters (ADCs) in the instrument. The ADCs are located on
the Analog (Trigger in SCD5000), Read Gun, and Write Gun boards. This test
checks communications to these boards coming from the Control board.
The components of this test are:
1. read the Analog board's analog-to-digital test node and check for the
proper response [Error: A]
2. read the Read Gun board's analog-ta-digital test node and check for the
proper response [Error: B]
3. read the Write Gun board's analog-to-cllgital test node and check for the
proper response [Error: C]
LED
Codes
SS01 0110
Error Messages
A.
ADe
readback minimum TT maximum
uu
actual AA (analog)
Indicates the test failed to read the test location on the Analog (or Trigger)
board correctly over the serial bus.
B.
ADe
readback minimum TT maximum UU actual AA (read)
Indicates the testfailed to read the test location on the Read Gun board
correctly over the serial bus.
C.
ADe
readback minimum TT maximum UU actual AA (write)
Indicates the test failed to read the test location on the Write Gun board
. correctly over the serial bus.
Maintenance
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