Kantronics KAM, Руководство пользователя

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Chapter 3 - Connecting your radio
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quire the HI level AFSK output from the KAM. Removing the jumper entirely will provide the maxi-
mum possible output level of approximately 1.6 V p/p. Should you require an intermediate value of
AFSK modulation signal, it may be obtained by replacing resistor R-25 with the appropriate value
chosen from the following chart. If you change R-25 to obtain an intermediate value, place K-5 in
the HIGH position. This unit is shipped from the factory with the jumper in the LO position.
R-12 Value AFSK Output Level
680 Ω 48 mV
3.3 kΩ 209 mV
4.7 kΩ 282 mV
6.8 kΩ 377 mV
22 kΩ 800 mV
K-6
TEST/NORMAL – This jumper is provided to initialize the EEPROM and to allow some self-testing.
The unit is initialized at the factory and shipped with the jumper in the normal position.
K-7
RS-232/TTL – This jumper is provided to change the KAM from RS-232 to TTL operating voltage
levels. This unit is shipped from the factory in the RS-232 position. If your computer operates at
TTL level voltages, reposition this jumper prior to placing this unit in service.
* OPERATING NOTE *
As shipped from the factory, the VHF "watch dog" timer is in effect and the HF "watch dog"
timer is not. The HF timer is not enabled since it cannot distinguish between RTTY and Packet sig-
nals. Should you plan to operate a mode other than Packet, the HF timer will limit your transmis-
sion time to approximately 2.5 minutes if it is enabled.
CONNECTING KAM TO YOUR RADIO
The KAM is attached to your transceivers via jacks and connectors on its back panel. There are
two radio ports labeled HF and VHF. Each of these is fully independent and is addressed individu-
ally from your computer keyboard.
CAUTION: Make sure the power of the transceivers, computer and KAM is OFF before connecting
any cables.