Specifications

The following parameters are the most common settings for HF Baudot
operation. Check the parameters and make sure they are set as follows:
RBAUD 45 (this is the most common amateur speed on HF)
RXREV OFF
TXREV OFF
MODEM 1
Note: The command, QRtty, will automatically select a modem when you
enter the Baudot or ASCII mode.
6.2.2 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.
In this case, you should select the FSK operating mode. Adjust the
volume to a comfortable listening level.
6.2.3 Tuning in Baudot and ASCII Stations
Tuning in Baudot and ASCII stations properly is critical to successful
operation. Since HF Baudot and RTTY stations use either 170 Hz or 200
Hz Frequency Shift Keying to send data, tuning accuracy is very
important. The command BARgraph will select the type of tuning
display. (See below.) Follow the tuning procedure below carefully
for the best results in tuning HF Baudot and ASCII stations.
o Make certain your HF receiver is either in LSB or FSK.
o Turn any IF-Shift and Passband-Tuning controls to the Center or
OFF position.
o Tune your receiver carefully between 14.08 and 14.10 MHz (or
another band where you know there is Baudot or ASCII activity)
and listen for RTTY stations.
o When you find a station, slowly vary the VFO tuning knob on your
receiver and look for a display on the PK-900 tuning indicator
like the one shown below.
——————————————————————————————————————————————————————————————
MARK |       | SPACE
——————————————————————————————————————————————————————————————
Tuning correct for discriminator indicator (BAR 0)
——————————————————————————————————————————————————————————————
|                 |
——————————————————————————————————————————————————————————————
Tuning correct for magic eye indicator (BAR 3)
——————————————————————————————————————————————————————————————
|   |
——————————————————————————————————————————————————————————————
Tuning correct for center tune indicator (BAR 2)
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