Southern Avionics Company SD100 Manual Do Utilizador

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5.13 Set the modulation level to 100%

5.14 Meter TP10 Set R41 fully CW and adjust R40 until the voltage equals the current in Amps on the current 

meter..                                              ( Example: 2.7 amps = 2.7volts at TP10 )

5.15 In the PC control window, set the RF Carrier power to Zero.

5.16 Turn the DC Input power switch on.

5.17  In the PC control Window again adjust RF Carrier Power output to Maximum allowed output as read by 

the scope.

5.18 Turn OFF the Transmitter AC power distribution switch and verify that Controller / Monitor automatically 

folds-back the RF Power to 80% of Maximum allowed  output. This fold-back feature helps preserve 
battery life in an emergency situation.

5.19 Turn Transmitter AC Distribution Switch  back on and verify Full legal power levels are re-established. 

5.20 Turn the DC input supply switch OFF

5.21 On the PC Control Panel window, set RF output and Modulation % to Zero

5.22 Close the control Window on the PC and Click on Power OFF, at which time HV relay drop-out  should be 

heard

5.23 Click on the CLOSE PORT button

6.0

PA POWER SUPPLY ALIGNMENT IS COMPLETE

6.1

Turn the Transmitter's AC Power off and allow HV to discharge

6.2

Turn Controller / Monitor's AC power OFF

6.3

Remove the PA Power Supply from the extender fixture.

6.4

Disconnect the Current meter connected to F1 fuse holder on the RF Mother Board and replace F1

6.5

Re-install the PA Power supply in the RF Module.

Safety Note:  Dangerous voltages are present on this PCB during power on tests. Be very careful when working on 
this board.  When power is removed dangerous voltage will still be present on the HV cap bank.  A built in HV 
Bleeder on the mother board will discharge the HV cap bank in about 30 seconds. On The PA Power supply PCB Red 
LED DS1 will be on if power is present. Another LED on the mother board will also indicate HV presence. Verify