Troubleshooting
6-78
TDS 420A, TDS 430A & TDS 460A Service Manual
3. Accessing J3: Using the Front Cover, Rear Cover, C abinet, Rear EMI
Gasket, and Cabinet Handle and Feet disassembly procedure, remove the
cabinet.
Table 6- 9: Connections for a 9 to 25 Pin Null Modem Cable
DB-9 Signals DB-9 Pin DB-25 Pin DB-25 Signals
DCD 1 20 DTR
RD 2 2 TD
TD 3 3 RD
DTR 4 6 and 8 DSR and DCD
SG 5 7 SG
DSR 6 20 DTR
RTS 7 5 CTS
CTS 8 4 RTS
Unused (R I) 9 -- All Others Unused
4. Connecting the equipment: Attach the console-port cable to J3 on the
A03 CPU module (see F igure 6--30) and, using an extender cable or
adaptors, to the RS-232 serial port of your personal computer (or RS-232
terminal).
5. Configure the personal computer:
a. Load the software: Load telecommunication (terminal) software into
your personal computer.
b. Select the software port: Configure the telecommunication software so
that it accesses the serial port that you connected to the console port
(Com1 or Com2).
c. Configure port parameters: Set the telecommunication software (or
terminal) parameters:
H Baud Rate 9600
H Parity None
H Data Bits 8
H Stop Bits 1
H Duplex Full
H Protocol None