Specifications

If you are having problems connecting to other HF packet stations, try
working with an experienced HF packet operator in your area and listen
to each other's signals. See if you can copy each other's packet
signals. If he cannot copy your signals, have him listen to your
signal in the CALIBRATE mode to make sure you are transmitting a pure
tone. As mentioned earlier, any distortion caused by overmodulation
or RF feedback will make your signal difficult or impossible to copy.
4.8 Controlling the Radio Ports
If you are using an AEA PAKRATT program designed for the PK-900,
switching between Radio Ports is described in the program manual.
If you are using a computer terminal, terminal program or the
"Dumb Terminal Mode" of an older PAKRATT program, this section will
describe how to control and switch between the radio ports. The
RADIO command allows either (or both) Radio Port(s) to be disabled.
Before the second radio port can be used for packet operation, the
proper modem must be selected using the 2MODem command.
Radio Port 2 Modems
1: Internal 200: 1070/1270 2: Internal 200: 2025/2225
3: Internal 1000: 1200/2200 4: Internal 1000: 1200/2200 eq.
5: Internal 200: 1180/980 6: Internal 200: 1850/1650
7: Internal 800: 2100/1300 8: Internal 800: 2100/1300 eq.
9: Internal option 10: Modem disconnect header
4.8.1 Selecting Modems
The various modems available in the PK-900 can be seen with the
DIRECT(ory) command. To display all the available modems simply
enter the Command Mode of the PK-900 and then type DIR as shown.
DIR <Enter>
The PK-900 will respond with the following:
- Port 1 - - Port 2 -
1: FSK 45 bps 170: 2125/2295 1: Internal 200: 1070/1270
2: FSK 100 bps 170: 2125/2295 2: Internal 200: 2025/2225
3: FSK 45 bps 200: 2110/2310 3: Internal 1000: 1200/2200
4: FSK 100 bps 200: 2110/2310 4: Internal 1000: 1200/2200 eq.
5: FSK 100 bps 425: 2125/2550 5: Internal 200: 1180/980
6: FSK 100 bps 850: 2125/2975 6: Internal 200: 1850/1650
7: FSK 100 bps 850: 1275/2125 7: Internal 800: 2100/1300
8: Analog 900/2500 8: Internal 800: 2100/1300 eq.
9: FSK 2400 bps 800: 1300/2100 9: Internal option
10: FSK 300 bps 200: 2110/2310 10: Modem disconnect header
11: FSK 1200 bps 1000: 1200/2200
12: Morse 750
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