Kantronics KAM, Руководство пользователя

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Chapter 3 - Connecting your radio
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Pin 8 – XCD – single yellow conductor lead
This line may be used to connect the squelch line from your HF transceiver if desired. This connec-
tion will not normally be required, nor used, unless operating an a shared voice channel.
Special Cases – Interfacing Handheld Radios
Many transceivers, especially most handheld models, obtain Push-To-Talk keying by completing
a circuit between the mic shield and PTT ground. A direct PTT input to the mic shield line of units
with this type electret condenser microphone is not usable without some type of isolation.
If you plan to operate with a handheld transceiver, KAM has incorporated an isolation circuit
which is available by jumper positioning. Enabling this circuit is done as follows:
1. Refer to assembly/disassembly instructions if necessary and remove the KAM from its case.
2. Locate point Z on the PC board. This point is at the rear, near the HF radio output port and
power jack.
3. Locate the three pads associated with Z. Note that the center pad and the pad marked 1 is
larger than the pad marked 2.
4. Carefully cut the connection between the center pad and pad 1.
5. Make a new connection between the center pad and pad 2. You may wish to make this
connection on the bottom of the PC board instead of the component side.
KAM is now ready for connection to electret condenser type microphone input circuits. Should
you later use a different type radio, this change may need to be reconfigured. Most other radios of
current manufacture will not require a KAM reconfiguration.