PK-232 MBX Operating Manual - N3UJJ

PK-232 OPERATING MANUAL
Pactor OPERATION
11.4 HF Receiver Settings
Set your HF receiver (or transceiver) to Lower Sideband (LSB) unless you
connected your PK-232 through the direct FSK keying lines. If you are
using a transceiver with a RTTY or Packet mode and you have the PK-232
connected for direct FSK, keep in mind that Pactor uses 200 Hz shift. If
your radio has a 200 Hz shift FSK for packet use, you may use direct FSK.
If your radio has only 170 Hz shift you should use the TX audio from your
PK-232 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. Follow the procedure below for
the best results.
•· Make certain your HF receiver is either in LSB or FSK/RTTY/PACKET
depending on your PK-232 set-up.
• Turn any IF-Shift and Passband-Tuning controls to the Center or OFF
position.
• Enter the command "PTLIST" for Pactor Listen to monitor both linked and
unproto Pactor data.
• 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 one
second 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 LED during the data burst.
• When you find a station, slowly vary the VFO on your receiver and look
for a display on the PK-232 tuning indicator as shown.
Tuned In
If the tuning indicator looks like the one below, the audio frequency from
your speaker is too low for the PK-232 to copy packets. Slowly tune the
VFO and make the frequency higher.
Frequency Too Low
2/93 11-3
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