Specifications

1. Connect your PK-900 and SSB radio as shown in Figure 3-5.
2. Turn on your PK-900 and your computer and start your terminal
program.
3. Connect your SSB radio to a dummy load.
4. If your SSB radio has a "monitor" facility, i.e., an audio
output that lets you listen to the audio signals entering the
microphone or phone patch jacks, turn that monitor circuit on.
5. Set the radio's MODE selector to LSB (lower sideband).
6. Set the radio's meter switch to the "ALC" position. If the
radio doesn't have an "ALC" indication, set the meter switch to
"Ip" or "Ic" to read plate/collector current. If a current
reading isn't available, set the meter to indicate power output.
7. If you are using an AEA program such as PC-PAKRATT, COM-PAKRATT
or MACRATT, you must enter the Dumb-Terminal mode (see program
manual) to access the CALIBRATE Mode described below.
8. Enter the Calibrate mode by typing: "CAL <Enter>."
NOTE: In the Calibrate mode only, the "K" key toggles the
transmitter PTT line on and off. The "SPACE BAR" toggles
the PK-900's tone generator from "Mark" (the lower pitched
tone) to "Space" (the higher pitched tone). The PK-900
has a transmit watchdog timer circuit that unkeys your
transmitter automatically after sixty (60) seconds. As you
perform the following adjustments, unkey periodically, then
rekey the transmitter by typing "K."
9. Adjust the transceiver's Microphone Gain control to its minimum
setting.
10. Press the "K" key on the keyboard to key the transmitter.
Increase the transceiver's microphone gain control until you hear
a continuous tone in the radio's monitor output.
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-900 keying the transmitter and transmitting the
lower of the two tones, adjust the transmit audio level as
follows:
I. Rotate the microphone gain control clockwise (CW)
approximately in the one-quarter ON position. You may
also set it to the position used for SSB operation.
II. Turn the PK-900's rear-panel AFSK Output Level
adjustment screw clockwise (CW) until the ALC
meter shows a small deflection from the unmodulated
reading. Check the radio's plate/collector current
or output power indicators.
4/94 3-11