The Radio Port 2 modems are:
MODEM 1 AFSK Modem, 200 Hz shift, Mark=1270 Hz, Space=1070 Hz
MODEM 2 AFSK Modem, 200 Hz shift, Mark=2225 Hz, Space=2025 Hz
MODEM 3 AFSK Modem, 1000 Hz shift, Mark=1200 Hz, Space=2200 Hz
MODEM 4 AFSK Modem, 1000 Hz shift, Mark=1200 Hz, Space=2200 Hz eq
MODEM 5 AFSK Modem, 200 Hz shift, Mark=980 Hz, Space=1180 Hz
MODEM 6 AFSK Modem, 200 Hz shift, Mark=1650 Hz, Space=1850 Hz
MODEM 7 AFSK Modem, 800 Hz shift, Mark=1300 Hz, Space=2100 Hz
MODEM 8 AFSK Modem, 800 Hz shift, Mark=1300 Hz, Space=2100 Hz eq
MODEM 9 AFSK Modem, Direct FSK 9600 baud internal option.
MODEM 10 Modem disconnect header External option, user supplied.
6.7.1 Selecting Modems
The various modems available in the PK-900 can be seen with the
DIR(ectory) 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
cmd:
Any modem from the list may be loaded with the MODEM command, but
only Radio Port 1 modems 1 through 7 and 10 should be used for
Baudot or ASCII RTTY.
For example, to operate 45 baud Baudot on radio port 1 and 1200 bps
VHF packet on radio port 2 you must load modem 1/4. To load modem
1 from Radio Port directory 1 and modem 4 from Radio Port directory 2,
first enter the Command Mode and then type MODEM 1/4 as
shown below:
MODEM 1/4 <Enter>
The PK-900 will respond with the following:
MODem was x/x (will show previous modems)
MODem now 1/4
When starting Baudot or ASCII RTTY operation, the PK-900 defaults to
3/93 6-11
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