
Copyright 1993 Link Communications
TX AUDIO OUTPUT ADJUSTMENTS:
The audio output adjustments require either a good ear or a deviation meter. We will start by putting a signal
in the Main Port and adjusting all three link outputs. Select MODE 0, control lines 1,2,3 inactive (5V or open). This
mode will route the Main Receiver to Links 1,2,3 when it goes active. Present your Main Receiver with the DTMF
touch tone "1", and connect your deviation meter to each link transmitter in turn, adjusting the corresponding LxO pot
for a 3 Khz. deviation level. To adjust the main port's output, MO, present the same tone to one of the links and
adjust the MO pot to the same level. This finishes the audio level adjustments.
TXIN ADJUSTMENT:
The TXIN audio input is usually connected to the main transmitter audio bus; you may not use it at all. It
can be used to send CW or voice messages down the linking system. Once the RLC-6 is properly adjusted you can
adjust the TXIN level. In order set the proper level, you need to cause your repeater controller to send a CW/Voice
message. The TXIN test-point is JP1 pin 5. When the audio message (CW/Voice) is present, adjust the peak voltage
monitored to match the levels adjusted earlier in the Audio Input Adjustment section, or to suit your pleasure. It can
be adjusted without affecting the levels of the other links. If there is not enough audio adjustment available on the
TXIN pot, replace R60 with a 200K
S
resistor. This will double the gain of the TXIN audio port. The TXAUD pin is
pin 32.
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