microHAM micro2R u2R User Manual page 11

2. Turn off both radios and make micro2R rear panel accessible.
3. Connect the cable from your left hand transceiver to the Radio 1 DB9 jack.
4. Connect the cable from your right hand transceiver to the Radio 2 DB9 jack.
5. Connect cables from PTTIN1 to the PTT out of RADIO1
IMPORTANT: This connection is required for proper audio switching in VOX operation.
6. Connect cables from PTTIN2 to the PTT out of RADIO2
IMPORTANT: This connection is required for proper audio switching in VOX operation.
7. Connect your headset to the Mic and Phones jacks.
8. Connect your paddles to the PADDLE jack.
9. If you use a foot switch or hand PTT, connect it to the FOOTSW jack.
10. Connect the SC OUT jack to the Line Out or Speaker jack of your sound card.
11. Connect the SC MIC jack to the Microphone jack of your sound card.
12. Connect a 12V-16V DC supply to the DC 13.8V jack.
Be sure to observe the proper polarity
NOTE: Do not use a power supply that is connected to either radio. Using a common power supply
for micro2R and a transceiver will permit power supply return currents from the transceiver to
flow through the micro2R grounds. As a result of design defects in the microphone circuit of
nearly every amateur transceiver, the return currents will generate a voltage in series with the
microphone input which will result in unwanted feedback (often called "RFI").
13. Locate the USB cable but
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DO NOT connect it at this time.
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