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	HOME / Repeater System Index / 146.620 Alignment

BBARC 146.620 McDonald Observatory Site Alignment:

Local Repeater = TKR-720
Link Radio = TK-862

VHF LOCAL REPEATER RECEIVER:
1. Monitor:
  1. Local Repeater transmitter output UHF connector.
  2. 146.620 MHZ.
2. Inject:
  1. Into Local Repeater input UHF connector.
  2. 146.020 MHZ.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. Receiver coils.
4. Verify:
  1. -119 engage and -120 drop out.
VHF LOCAL REPEATER TRANSMITTER:
1. Monitor:
  1. Local Repeater transmitter output UHF connector.
  2. 146.620 MHZ.
2. Inject:
  1. Into Local Repeater Preamp input UHF connector.
  2. 146.020 MHZ.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. ???
  2. 20 Watts.
4. Verify:
  1. ~20 watts.
VHF LOCAL REPEATER DUPLEXERS:
1. Monitor:
  1. Duplexer antenna connector.
  2. 146.620 MHZ.
2. Inject:
  1. Into Duplexer antenna connector.
  2. 146.020 MHZ.
  3. 1.0 KHZ audio at 3.5 KHZ deviation.
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. Duplexers.
4. Verify:
  1. 119 engage and -120 drop out.
  2. 17 watts.
VHF LOCAL REPEATER RECEIVER MAXIMUM DEVIATION:
1. Monitor:
  1. ???
  2. 146.620 MHZ.
2. Inject:
  1. Into Local Repeater Preamp input UHF connector.
  2. 146.020 MHZ.
  3. 1.0 KHZ audio at 7.0 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. ???
  2. Set level to 5.5 to 6.0 KHZ.
4. Verify:
  1. 5.5 to 6.0 KHZ deviation maximum.
5. Finish:
  1. Remove injected signal.
VHF LOCAL REPEATER RECEIVER CTCSS DEVIATION:
1. Monitor:
  1. Local Repeater transmitter output UHF connector.
  2. 146.620 MHZ.
2. Inject:
  1. Nothing.
  2. Press the PTT on the microphone.
3. Adjust:
  1. ???.
  2. Set level to 0.5 KHZt.
4. Verify:
  1. 0.5 KHZ of 146.2 HZ deviation.
VHF DUPLEXER OPERATION:
1. Monitor:
  1. Local Repeater Duplexer output UHF connector.
  2. 146.620 MHZ.
2. Inject:
  1. Into Local Repeater Duplexer output UHF connector.
  2. 146.020.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Verify:
  1. -116 DBM engage, -119 DBM release.
  2. 22 watts output.
  3. No desense.
VHF LOCAL REPEATER RECEIVE AUDIO TO CONTROLLER:
1. Monitor:
  1. RMS volts AC.
  2. RLC-1 Controller "MI" test point.
2. Inject:
  1. Into Local Repeater Duplexer output UHF connector.
  2. 146.020.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. ???
  2. Set level to 1.414 Vac.
4. Verify:
  1. 1.414 VAC.
VHF LOCAL REPEATER RECEIVE AUDIO TO UHF LINK RADIO TRANSMITTER:
1. Monitor:
  1. Link Radio antenna connector.
  2. 443.000 MHZ.
  3. RLC-1 Controller""LO" test point.
2. Inject:
  1. Into Local Repeater Duplexer output UHF connector.
  2. 146.020.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. RLC-1 Controller "LINK TRANS" pot.
  2. Set level to desired output( ~0.666 Vac).
4. Verify:
  1. 4.2 KHZ deviation.
  2. ~0.666 Vac.
UHF LINK RADIO RECEIVER:
1. Monitor:
  1. Local Repeater transmitter output UHF connector.
  2. 146.620 MHZ.
2. Inject:
  1. Into Link Radio antenna connector.
  2. 448.000 MHZ.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. Whatever you can.
4. Verify:
  1. -119 engage and -121 drop out.
5. Monitor:
  1. RMS volts AC.
  2. RLC-1 Controller "LI" test point.
6. Adjust:
  1. RLC-1 Controller "LINK REC" pot.
7. Verify:
  1. 1.414 VAC.
8. Monitor:
  1. RLC-1 Controller "MO" test point.
9. Adjust:
  1. RLC-1 Controller "MAIN TRANS." pot.
10. Verify:
  1. 4.2 KHZ deviation.
UHF LINK RADIO TRANSMITTER:
1. Monitor:
  1. Link Radio antenna connector.
  2. 443.000 MHZ.
2. Inject:
  1. Into Local Repeater Duplexer output UHF connector.
  2. 146.020 MHZ.
  3. 1.0 KHZ audio at 3.5 KHZ deviation
  4. 146.2 HZ CTCSS at 0.5 KHZ deviation.
3. Adjust:
  1. Whatever you can.
4. Verify:
  1. ~12 watts.
Go have a beer.


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