S-COM 7K, Manual, Page: 376 / 400

7K
•
Appendix C
C-18
DIP Switches
The 7K Main Board contains a group of 8
DIP Switches
. They are used to
invert the logic of the 3 COR inputs, the 3 CTCSS decoder inputs, and the 2
PTT outputs. In all cases, a switch in the ON (closed) position means low
active; a switch in the OFF (open) position means high active.
DIP Switches
Controller Main Board
Switch # Function
1 inverts receiver #1 COR
2 inverts receiver #2 COR
3 inverts receiver #3 COR
4 inverts CTCSS decoder for receiver #1
5 inverts CTCSS decoder for receiver #2
6 inverts CTCSS decoder for receiver #3
7 inverts transmitter #1 PTT
8 inverts transmitter #2 PTT
Testing The Controller-To-Repeater Transmitter
Interface
Apply power to both the controller and the repeater while monitoring the
repeater with an extra receiver. When power is applied, the transmitter should
key and send the reset CW message.
If the transmitter does not key at all:
•
Check the wiring. Both the controller and the repeater should be powered
up.
•
Check the connection between the controller’s PTT output and the
transmitter’s PTT input.
If the transmitter keying is acting “upside down” (unkeying during the message
but keying afterwards), reverse the repeater transmitter PTT DIP switch.
If the transmitter is keying properly but no CW message is heard, check the
wiring from the controller’s repeater transmitter audio output to the transmitter’s
audio input.
If the CW message is too loud or too soft:
•
Adjust the CW-to-TX pot on the main board.
•
See the
Messages
chapter on page 4-1.
•
Turn the pot clockwise to increase the level, and counter-clockwise to
decrease the level.