Custom Products for the Repeater Builder

MICOR Analog Noise Squelch Board
Pin assignments, function, signal flow direction, notes, and limitations.

PINFunctionDirectionNotes and limitations
1PL logic output (active low) or PL disable inputIn/OutSJ1 - SJ2 sets function - see instructions
2Receive audio input - to high pass filterInOperates only in RX mode - SJ5 connects pins 2 and 3 together
3Discriminator audio inputInConnects also to pin 16
4CTCSS tone outputOutOperates only in TX mode
5Receive audio output - from HP filterOutOperates only in RX mode
6Transmit audio output - from HP filterOutOperates only in TX mode
7Spare - can be routed anywhere desiredIn/OutCan connect to A - F outputs or elsewhere
8Transmit audio input - to HP filterInOperates only in TX mode
9RX - TX mode switchInGround for TX mode (encode only)
10PL logic output (active high)OutCurrent limited - includes a pull-down
11COS output (active high)OutCurrent limited - includes a pull-down - "AND" Output when SJ2 in place (active high)
12Spare - can be routed anywhere desiredIn/OutCan connect to A - F outputs or elsewhere
13Power supply positive (+12 to +16 VDC)In12 - 16 VDC typical, up to 24 VDC maximum
14PTL (push to listen)InSee FX465 data sheet for operation
15RUS (active low)OutOriginal logic out of MICOR squelch chip
16Discriminator audio outputOutConnects to pin 3
17COS output (active low)Out"AND" output when SJ2 in place (active low)
18Ground  
19Ground  
20Ground  
21Ground  
22Ground  
23Ground  
24Ground  
25Spare - can be routed anywhere desiredIn/OutCan connect to A - F outputs or elsewhere
    
NOTE:Use outputs A - F only when primary logic outputs above cannot be used!NOTE:These can be tied to "Spare" pins 7, 12, and 25
AAlternate Open Collector COS output (active low) -- Use of "F" is preferredOutUse position "F" because of less junction "depth"
BAlternate Open Collector COS output (active low) -- Use of "F" is preferredOutUse position "F" because LED bias/operation can be affected
COpen Collector COS output (active high)OutPreferred Open Collector output for active high COS
DOpen Collector PL output (active high)OutPreferred Open Collector output for active high PL
EOpen Collector PL output (active low)OutPreferred Open Collector output for active low PL
FOpen Collector COS output (active low)OutPreferred Open Collector output for active low COS

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Specifications may change without notice.
HTML December 30, 2014, W3KKC All Rights Reserved!