Specifications

11.4 HF Receiver Settings
Set your HF receiver (or transceiver) to Lower Sideband (LSB) unless
you connected your PK-900 through the direct FSK keying lines. If you
are using a transceiver with a RTTY or Packet mode and you have the
PK-900 connected for direct FSK, keep in mind that PACTOR uses 200
Hz shift. If you radio has a 200 Hz shift FSK for packet use, you may
use direct FSK. If your radio has only 170 Hz shift capability, you
should use the TX audio from your PK-900 to drive the microphone input
of your radio. You may use either USB or LSB. By convention, LSB is
generally used. Adjust the volume to a comfortable listening level.
11.5 Tuning in PACTOR Stations
Tuning in PACTOR stations properly is critical to successful
operation. Since HF PACTOR stations use 200 Hz Frequency Shift
Keying (FSK) to send data, tuning accuracy is very important.
The BARgraph command will select the type of tuning display. See the
command summary Appendix for a description of BAR. Note the different
displays below. Follow the procedure below for the best results.
o Make certain your HF receiver is either in LSB or FSK/RTTY/Packet
depending on your PK-900 set-up.
o Turn any IF-Shift and Passband-Tuning controls to the Center or
OFF position.
o Enter the command "PTLIST" for PACTOR Listen to monitor both
linked and unproto PACTOR data.
o Tune your receiver carefully between 14.065 and 14.085 MHz (or
another band where you know there is PACTOR activity) and listen
for the data burst of ARQ PACTOR or the steady data of the
unproto mode stations. Be sure that the THRESHOLD CONTROL is
turned far enough clockwise to activate the DCD LCD indicator
during the PACTOR data burst.
o When you find a station, slowly vary the VFO on your receiver and
look for a display on the PK-900 tuning indicator as shown.
——————————————————————————————————————————————————————————————
MARK |       | SPACE
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Tuning correct for discriminator indicator (BAR 0)
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|                 |
——————————————————————————————————————————————————————————————
Tuning correct for magic eye indicator (BAR 3)
——————————————————————————————————————————————————————————————
|   |
——————————————————————————————————————————————————————————————
Tuning correct for center tune indicator (BAR 2)
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