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PK-232 TECHNICAL MANUAL
6.1.
Preliminary Setup
Connect the P to a well-regulated source of 13 Volts DC. The power supply must be rated at
one ampere minimum.
Connect the terminal to the PK-232's RS-232 connector.
Set the terminal for:
BAUD RATE
DATA BITS
PARITY
STOP BIT
Apply power to the PK-232 and observe the sign-on message on the terminal's screen:
Please type a star (*) for auto-baud routine
Type a few stars (
6.2.
Calibration Procedure
Refer to Figures 2, 3 and 4 in APPENDIX C for circuit diagrams and printed circuit board
component locations, and also to APPENDIX D for sample signal waveforms.
The AFSK generator frequencies will be adjusted using the PK-232's internal calibration rou-
tine and built-in frequency meter. An external frequency counter may also be connected at
the junction of R160 and C59.
Allow the PK-232 at least 20 minutes to reach normal operating temperatures before starting
the calibration routines.
Preset variable resistors R164, 165, 167 and 168 fully CCW (counterclockwise). Preset R155
to the center of its range.
NOTE: Commands are shown enclosed in quotation marks. Do not type the quotation
marks when entering commands. Command may also be written in red letters.
PK232TM Rev. A 5/87
CHAPTER 6 – ADJUSTMENTS AND TESTS
1200
7
NONE
1
) until the screen shows the AEA sign-on message.
*
CHAPTER 6 – ADJUSTMENTS AND TESTS
6-1
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Troubleshooting
