25-pin Transceiver Connector on the rear panel of RigExpert Interfaces
|
Pin |
Pin name |
Comment |
|---|---|---|
|
1 |
FSK_OC |
FSK open-collector output |
|
14 |
FSK_PULLUP |
Pullup to +5V through 4.7K resistor |
|
2 |
DIT |
CW paddle input (dit), shorten to ground – RigExpert Plus/TI-5 only |
|
15 |
DAH |
CW paddle input (dah), shorten to ground – RigExpert Plus/TI-5 only |
|
3 |
VCC |
+5V output (USB power line) |
|
16 |
PTT5V |
TTL-level PTT output (5V in transmit, 0V in receive mode) |
|
4 |
CW_OC |
Open-collector CW output |
|
17 |
PTT_OC |
Open-collector PTT output |
|
5 |
DCD |
DCD (squelch) input |
|
18 |
12V_MAX |
+12V output (generated by MAX232 chip) |
|
6 |
SPK_TRCVR2 |
Transceiver audio output (speaker), sub receiver |
|
19 |
RXD_OE |
Serial input (5V levels), connect RXD5V to VCC to activate this input |
|
7 |
CIV_IN |
CI-V input (ICOM transceivers), pulled up to 12V_TRCVR with 4.7K |
|
20 |
12V_TRCVR |
Connect to VCC to power the CIV_IN input |
|
8 |
CIV_OUT |
CI-V open-collector output (ICOM transceivers), connect to CIV_IN |
|
21 |
CO_PULLUP |
Pullup to +5V through 4.7K resistor |
|
9 |
TXD12V |
RS-232-compatible serial output (±12V levels) |
|
22 |
RXD12V |
RS-232-compatible serial input (±12V levels) |
|
10 |
TXD5V |
Serial output (5V levels) |
|
23 |
RXD5V |
Serial input (5V levels) |
|
11 |
GND |
Digital ground |
|
24 |
GND |
Digital ground |
|
12 |
SPK_TRCVR |
Transceiver audio output (speaker) |
|
25 |
MIC_TRCVR |
Transceiver audio input (microphone) |
|
13 |
AGND_TRCVR |
Audio signal ground |
Audio in/out:
- SPK_TRCVR is connected to the transceiver speaker (or line out) output.
- SPK_TRCVR is connected to the transceiver speaker (or line out) output for the sub receiver (if available).
- MIC_TRCVR is connected to the transceiver microphone (or line in) input.
- AGND_TRCVR is connected to the transceiver ground (connection point should be as close to the transceiver as possible).
RigExpert interfaces decouple audio in/out signals from computer signals using transformers, which prevents interference caused by parasitic current in grounding.
FSK output:
FSK_OC is an open-collector output, sinking 50mA maximum (using BC817 NPN transistor). Connect this pin to FSK_PULLUP to obtain the TTL-level output.
PTT and CW outputs:
PTT_OC and CW_OC are open-collector outputs, sinking 50mA maximum (using BC817 NPN transistors). PTT5V is a TTL-level PTT output (5V in transmit, 0V in receive mode), output current is 5mA maximum.
CW paddle inputs:
DIT and DAH are CW paddle inputs (single or double paddle for yambic keying), pulled up to +5V with 4.7K resistors.
Serial in/out:
RigExpert interfaces provide various methods of connecting serial in/out lines with different signal levels to the virtually any model of transceiver. This only requires shortening some pins on the RigExpert transceiver connector.
- RS-232-compatible mode uses TXD12V and RXD12V lines with ±12V signal levels, provided by MAX232 interface chip.
- CI-V mode uses CIV_IN and CIV_OUT lines (should be shortened together). CIV_IN is internally pulled up with 4.7K resistor to 12V_TRCVR, which should be connected to VCC.
- TTL-level (5V) mode uses TXD5V and RXD5V lines. Signal polarity is opposite to RS-232 mode.
- Yet another TTL-level mode (signal polarity is the same as with RS-232 mode) uses CIV_OUT output (should be connected to CO_PULLUP) and CIV_IN input (12V_TRCVR line should be connected to the VCC output). It is better to use RXD_OE input in this mode (RXD5V should be connected to VCC to activate this input).