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9.3 System Setup<br />
If you own CSS HF Wefax program, you have the ability to display<br />
weather FAX on the screen of your personal computer. DO NOT USE AN AEA<br />
"Y" CABLE WITH THE <strong>PK</strong>-<strong>232</strong>/DSP or <strong>PK</strong>/<strong>232</strong>PSK! This manual refers most<br />
often to printing FAX on your printer, but the ideas and commands are<br />
similar for using CSS HF Wefax program.<br />
To hook-up the <strong>PK</strong>-<strong>232</strong> for facsimile operation the radio must be<br />
connected to either radio port 1 or 2. If all you want is to receive<br />
FAX, you only need to connect the audio from your receiver. If you<br />
wish to transmit as well, follow the instructions in Chapter 3 of this<br />
manual for Radio Connections.<br />
If you are using a CSS HF Wefax program, follow the instructions in the<br />
program manual to run the program with the <strong>PK</strong>-<strong>232</strong>.<br />
9.3.1 HF Receiver Settings<br />
Set your HF receiver (or transceiver) to Upper Sideband (USB) unless<br />
you have connected your <strong>PK</strong>-<strong>232</strong> through the direct FSK keying lines.<br />
In this case, you should select the FSK operating mode. Adjust the<br />
volume to a comfortable listening level.<br />
9.3.2 Tuning In HF Facsimile Stations<br />
Facsimile is most often found on Upper Sideband and sounds similar to<br />
monitoring an AMTOR QSO with both stations being of equal strength.<br />
The most common facsimile signals are WEFAX, so we have set the <strong>PK</strong>-<strong>232</strong><br />
FAX default parameters to copy weather charts and many satellite<br />
photographs. We recommend starting start with one of the listed<br />
weather frequencies, or frequencies from Popular Communications in<br />
Table 1 when first receiving facsimile.<br />
Upon tuning into a WEFAX signal, you will notice that the facsimile<br />
sound seems to repeat at the rate of twice a second. This is the the<br />
horizontal scan frequency, and allows you to distinguish different<br />
facsimile services by speed. Common horizontal scan rates are 2 lines<br />
per Second, which is typically used in weather facsimile broadcasts,<br />
1-line per Second for photographs, and 4-lines per second, for some<br />
foreign facsimile stations. Listen for these repetition rates as you<br />
tune across the bands in search of new pictures.<br />
12/01 9-2<br />
From The <strong>N3UJJ</strong>.COM Document Library