JOTRON electronics a.s.
December, 99
Page 18
15
LOCAL KEY INPUT.
The signal is connected in parallel with pin 3 on the microphone
connector and may be used for an external microphone, connected to the
rear of the transceiver. The signal should be referred to MIC. GND (pin
17). A closed contact between these pins will key the transceiver in local
position.
16
MICROPHONE INPUT
The signal is connected in parallel with pin 1 on the microphone
connector and may be used for an external microphone, connected to the
rear of the transceiver. The signal should be referred to MIC. GND (pin
17).
17
MIC. GND
This pin is connected in parallel with pin 4 on the microphone connector
and is the ground for the microphone signals (audio and PTT).
18
AUXILIARY CONTACT, NORMALLY CLOSED
The pin is connected to the normally closed pin of an auxiliary relay.
See pin 19 for operation.
19
AUXILIARY CONTACT, CENTER PIN
The pin is connected to the centre pin of an auxiliary relay.
The relay operates by default when the transceiver is keyed or the squelch
is open. It could be made to operate only if the transceiver is keyed by
removing link 1 on the line interface board.
Maximum current through the relay contacts should be limited to 200
mA.
20
AUXILIARY CONTACT, NORMALLY OPEN
The pin is connected to the normally open pin of an auxiliary relay.
See pin 19 for operation.
21
D0, REMOTE CHANNEL SELECTION, LSB
1
The pin is the least significant bit of the remote channel selection. A TTL
signal is used to set the channel, the signal is active low (0V) referred to
GND (pin 14). The signal is pulled up internally.
22
D2, REMOTE CHANNEL SELECTION, MSB
1
The pin is the most significant bit of the remote channel selection. A TTL
signal is used to set the channel, the signal is active low (0V) referred to
GND (pin 14). The signal is pulled up internally.
23
NO CONNECTION
24
NO CONNECTION
25
NO CONNECTION
Содержание TR6101
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