6
Radio Interface:
CON6 is located in the middle of the back panel and is used to connect the TTC-2 to the base station radio or
repeater. The following are the connection points:
CON6:
CON6-1 (Gray): F2:
Connect this lead to the F2 channel selector position on the radio. With JP14 installed in the
1-2 position, the output is an open-collector to ground. With JP14 installed in the 2-3 position, the optional F1/F2
relay is active low upon contact closure with JP15 installed in the 2-3 position.
CON6-2 (Orange): COR:
Connect this lead to the busy detect of the radio. This input is used to control whether
audio should be passed down the line to the tone remote controllers. Generally this line is not used, but if the
base station has any low-level noise or hum this line will mute the noise until the radio opens squelch and passes
full audio. A logic low from the radio’s busy circuit will activate Q8.
CON6-3 (Violet): SPARE:
Future Use.
CON6-4 (Yellow): Monitor:
Connect this lead to the radio’s monitor input to disable CTCSS/DCS. With JP8
installed in the 2-3 position, the output is an open-collector to ground. With JP8 installed in the 1-2 position, the
optional monitor relay is active low upon contact closure with JP9 installed in the 2-3 position.
CON6-5 (Green): TX Output:
Connect to the microphone input of the base station/repeater.
CON6-6 (Red): Battery (13-18 VDC):
Connect this lead to 13-18 VDC from the base station/repeater.
CON6-7 (Black): Ground:
Connect this lead to the base station’s or repeater’s ground.
CON6-8 (White): RX Input:
Connect the receive audio in the base station after the sub-audible hi-pass filter and
at some point that gives flat audio to the TTC-1. Speaker audio is fine if it is single ended, but make certain the
volume control cannot be turned down accidentally.
CON6-9 (Blue): PTT Output:
Connect this lead to the PTT on the radio. With JP1 installed in the 2-3 position, the
output is an open-collector to ground. With JP1 installed in the 1-2 position, the optional PTT relay is active low
upon contact closure with JP4 installed in the 2-3 position.
CON6-10 (Brown): F1:
Connect this lead to the F1 channel selector position on the radio. With JP13 installed in
the 1-2 position, the output is an open-collector to ground. With JP13 installed in the 2-3 position and SJ-12
installed, the optional F1/F2 relay is active low upon contact closure with JP15 installed in the 2-3 position.
