GE M
EDICAL
S
YSTEMS
PROPRIETARY
TO
GE
D
IRECTION
2294854-100, R
EVISION
3
LOGIQ™ 9 P
ROPRIETARY
M
ANUAL
Chapter 7 Diagnostics/Troubleshooting
7-23
7-7-4-1Board-Level SCB Diagnostics
•
SCB PCI Interface Diag
: Tests the Host’s ability to communicate with the SCB via the secondary
PCI bus.
NOTE:
A preferred test strategy for the PCI 9054 Interface is detailed in
•
SCB Memory Diag
: Tests all of the on-board memory, including registers. Some on-board RAM
requires other functionality (DSP RAM, RxSync RAM). These memories will be tested in their
respective function-related diagnostics.
•
SCB DSP Diag
: Tests the following:
-
The Host's communication to the DSP via the Comm Ports.
-
DSP Memory.
-
DSP Processor (Self-Test).
-
DSP Interrupts.
-
DSP LED's.
•
SCB Scan Bus Diag
: Tests the RxSync RAM, and the local on-board Scan Bus. Also, the System
Timing block's utilization of the Scan Bus to generate proper TxSync and RxSync pulses is verified
in non-CW mode.
NOTE:
The backplane Scan Bus is tested at the system level.
•
SCB Image Port Diag
: Tests the following Image Port functionality:
-
The Data and Control Fifos (control lines and data lines).
-
The various components (registers, state machines, i960) and signal lines that transfer data
from the Data FIFOs to the Image Memory.
-
The LOGIQ™ 9-to-Pipelink formatting and transfer to Image Memory, including Scan Bus
decoding, Image Port state machines, i960, etc.
-
The i960/Video Decoder communication.
-
DMA transfer from the Image Memory to the host.
This diagnostic does not test the SCB's ability to capture I/Q data from the EQ, nor B/M data from the
BMP. These functions are tested at the system level.
NOTE:
In R3.x software the following error may or may not occur: “Failed SCB DSP Interrupt Test,
TxSynce High Time = 00000000”. This test is located under the SCB Diagnostics. A 10% failure
rate is considered acceptable. You may need to run this test multiple times before considering
it a true SCB failure.
