o Listen to the monitor receiver; turn the PK-232's rear-
panel AFSK Output Level adjustment screw clockwise (CW)
until you hear no increase in output level in the
monitoring receiver.
o Rotate the AFSK Output Level adjustment screw
counterclockwise (CCW) until the audio signal on the
monitoring receiver is slightly but noticeably reduced from
the maximum level.
10. Type "K" to return to receive mode.
11. Type "Q" to "Quit" (exit) the calibration routine.
You've now set your FM transmitter's deviation to an approximate level
which will be adequate for initial operation.
12. With your radio in the receive mode, open the squelch control so
that a steady hiss or noise is heard on a speaker.
13. Set the PK-232's THRESHOLD control to the "2 o'clock" position.
14. Set the receiver's volume control so the DCD LED on your PK-232
just lights with the receiver unsquelched. This is the
approximate proper level for best receive performance from your
PK-232's modem.
15. Reset your receiver's squelch control for normal operation.
3.5.2 SSB Transceiver Final Adjustments
Digital modes with an SSB radio require some different settings of
the radio's operating controls for proper AMTOR and packet operation.
Be sure to observe the following setting precautions:
o Set VOX to OFF.
o Set speech compression to OFF.
o Set AGC to FAST (if available).
o Disconnect the ALC cables between your SSB radio and any external
RF amplifier you wish to use in AMTOR or packet radio service.
Remember - Baudot and ASCII RTTY and Mode B (FEC) AMTOR are
continuous key-down conditions - Your radio's duty cycle is 100% for
the duration of each transmission. If your SSB radio isn't designed
for continuous full-power operation, you must operate your radio at
reduced output power. Consult the manufacturer's specifications for
details on the operating duty cycle.
NOTE: Make all connections with all power off.
1. Connect your PK-232 and SSB radio as shown in Figure 3-6.
2. Turn on your PK-232 and your computer and start your terminal
program.
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