PK-232 MBX – OPERATING MANUAL RADIO INSTALLATION
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11. If you are able to hear the tones in radio's speaker, tap the space bar several times
until you hear the lower pitched of the two tones ("mark").
12. With the PK-232 keying the transmitter and transmitting the lower of the two tones,
adjust the transmit audio level as follows:
If you have already connected and calibrated an FM transceiver to the other PK-232
RADIO port, then complete the following:
I. Rotate the microphone gain control counterclockwise (CCW) until it is
in the totally OFF position.
II. Turn the transmitter's microphone gain control adjustment clockwise
(CW) until until the ALC meter shows a small deflection from the un-
modulated reading. Check the radio's plate/collector current or output
power indicators.
III. Adjust the microphone gain control until the radio's indicators show
approximately thirty percent (30 %) of the manufacturer's rated full-
power reading.
EXAMPLE: If the manufacturer's plate/collector current specification for
CW operation is 200 mA, set the AFSK Output Level control
and your microphone gain control so that the plate/collector
current indicates approximately 75 mA.
If you have not connected and calibrated an FM transceiver to the PK-232 and do
not plan on doing so, then complete the following:
I. Rotate the microphone gain control clockwise (CW) approximately in
the one-quarter ON position.
II. Turn the PK-232's rear-panel AFSK Output Level adjustment screw
clockwise (CW) until until the ALC meter shows a small deflection
from the unmodulated reading. Check the radio's plate/collector cur-
rent or output power indicators.
III. Adjust the AFSK Output Level control until the radio's indicators show
approximately thirty percent (30 %) of the manufacturer's rated full-
power reading.
EXAMPLE: If the manufacturer's plate/collector current specification for
CW operation is 200 mA, set the AFSK Output Level control
and your microphone gain control so that the plate/collector
current indicates approximately 75 mA.
13. Type K to return to receive mode.
14. Type Q to "Quit" (exit) the calibration routine.
You have now set the PK-232's transmit audio output level and your SSB radio's micro-
phone gain control to an approximately correct level for all operating modes.
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