Specifications

Figure 3-7 PK-900 AFSK HI/LOW Level Jumpers
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 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. If using radio port 1, set the receiver's volume control to a
comfortable listening level. With the receiver unsquelched but
with no signal present, adjust the THRESHOLD control so the DCD
LCD on your PK-900 just lights. This is the approximate proper
level for best receive performance from your PK-900's modem. If
using radio port 2. Normal listening levels will activate the
DCD with received signals.
14. 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 recommendations:
o Set VOX to OFF.
o Set speech compression to OFF.
o Set AGC to FAST (if available).
o If you wish to use an external RF amplifier in AMTOR, PACTOR or
Packet, disconnect the ALC cables between your SSB radio and the
external RF amplifier.
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.
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