Lexicon RV-8 Service Manual page 57

Lexicon
Serial Debug Port
The Serial Debug Port is available to provide diagnostic status to be viewed on an external PC from the
D9 connector labeled RS232. Using a terminal or a PC running a terminal program, the progress of the
diagnostics can be monitored and test failure information is reported. The serial protocol is 19200bps, 8,
O, 1, (8 data bits, Odd Parity, 1 Stop Bit).
Serial Debug Cable
The cable required to connect the RS232 serial debug port to the computer is a straight-through serial
interface cable. A null modem adapter or cable should not be used. The RV-8 RS232 connector on the
rear panel is a D9 female; so one end of the serial cable must be a D9 male. The other connector on the
cable depends upon the RS232 connector used on the computer. The computer may have a D9 or a D25
male connector. Typically computers have a D9 for COM 1 and a D25 for COM 2. However, some newer
computers use a D9 for both COM 1 and COM 2. The COM port used on the computer does not matter,
however you must ensure that whatever serial communications program is being used has the correct
computer COM port selected.
Serial Debug Program
The serial debug program controls the communication from an RV-8 to a computer. This program allows
a user to view activity of the unit and to control and configure the unit for testing. The debug program is
used extensively to perform audio and video testing of a unit in the audio and video ATE programs.
Error Codes
The error codes for the diagnostic tests that report additional failure information consist of six parts as
described below:
"E## tXX aYYYYYY
wZZZZZZ rQQQQQQ"
E##: Failure Number
The E stands for error and the hexadecimal number after the E indicates test number from the list below.
tXX: Error Codes List
NO_ERROR
ADDR_FAILURE
DATA_FAILURE
TIMEOUT_FAILURE
COUNTER_FAILURE
NON_VOL_DATA_FAILURE
OPCODE_FAILURE
AVRX_FPGA_ID_NO_MATCH
DAR_FPGA_ID_NO_MATCH
AUDIO_FPGA_ID_NO_MATCH
ANALOG_FPGA_ID_NO_MATCH
VFD_TIME_OUT
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
5-3