General Dynamics CG-1220, Operation And Maintenance Manual

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Operation
CG-1220 DTR 4-7

SPU SERIAL LINK STATS – This screen displays SPU RS422 serial link
statistics separately for the MCU and DSP. Timeouts are displayed when
the CPU did not get a response within 100ms. Errors are logged when an
unexpected response did not match internal protocol. The percentage of
errors plus timeouts versus the total number of commands is displayed.
Linklosses displays the number of failures to establish communication with
the MCU or DSP processors. Finally, the total number of commands sent is
displayed.

I/O STATUS – Current I/O status information obtained from the I/O card is
displayed. This information is intended for diagnostic purposes. Given data
format x(y), all x are hex and all y are human-interpretable synonyms of x. x
is the internal configuration value useful to GDST technical support (it is
subject to change without notice). y is loosely the selected band, but more
specifically: (-) if x is undefined (more than one or none), ( ) if x is none; see
the specific field description for more details.
-
The INTF#1 and the INTF#2 fields provide information regarding the input
and output states of the I/O INTERFACE #1 and I/O INTERFACE #2
connectors on the back panel.
-
FAULTS
is a 4-bit mask where bit 0 is the fault indicator of the first BDC,
bit 1 is of the second, etc. A zero bit means the BDC is present and
powered off (or malfunctioning). "ok" or "BAD" is display, the latter if
the BDC for the current band is malfunctioning or not powered up.
-
The BDC fields are internal bit settings that the I/O card uses to set the
correct BDC for the selected band.
o
BDC POWER IN - y is the number of the BDC whose power is on.
o
BDC SELECTED - x bits are active low (e.g. 0x7=~0x8,... 0xE=~1).
y is the number of the BDC whose RF output is selected. Note:
standard product DTR's do not use SPDT switches with indicators,
therefore these always show the status bits set (-).
o
BDC POWER OUT - x bits are active high and specify the BDC to turn
on and the others to turn off, bit 7 for BDC 1 on, bit 6 for BDC 1 off,
5 for BDC 2 on, etc. y is the number of the BDC whose power was
turned on.
o
BDC SELECT - x bits are active high, bit 3 set for position 1, 2 for 2,
etc. y is the number of the BDC whose RF output was selected.
- The SPDTX4 fields are internal bit settings that the I/O card uses to set
the correct RF switch settings.