d) KEY-IN socket
This is the amplifier's input for receive/transmit control from the transceiver.
The transceiver controls the amplifier from receive mode into transmit mode (RX/TX) by grounding of the
KEY-IN input.
Run a shielded cable from the "ground on transmit" socket or terminal on your transceiver to the amplifier
KEY-IN socket (see Figure 2-1 Rear panel - Connections, Pos. (d)). The KEY-IN socket uses a standard RCA
phono plug.
Voltage on the KEY-IN socket does not exceed 12 V and the current is below 6 mA.
Your amplifier will not work if KEY-IN input is not connected properly.
Transceiver producers give different names to this output and they are for instance
TX-GND, SEND, T/R-LINE, PTT, etc. Some transceivers require that "ground on transmit"
is implemented via a software command, or by changing the setting of a switch on the
rear panel, or interior of the transceiver. Check your transceiver's manual.
e) Main fuses
NOTICE
Make sure you check whether the main fuses installed in your amplifier (see Figure 2-1
Rear panel - Connections, Pos. (e)) correspond to your local mains nominal voltage and if
necessary, replace them as described in Section 5.3 Fuse Replacement!
WARNING
If your amplifier is only fitted with one line (mains) fuse, it is suitable for European
Community ONLY. Your dealer will check that your amplifier is correctly fused before it is
shipped to you. Customers should check with a qualified electrician if the amplifier is to
be used outside the country in which it was purchased.
f) The IEC 320 Power inlet
Please, see Figure 2-1 Rear panel - Connections, Pos. (f).
Due to the different standards in different countries, the power supply cable and mains plug are supplied
and mounted by the dealer. He connects to the mains cord end a standard mains supply plug which meets
the Safety Class I unit standard in your country.
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