Southern Avionics Company SD100 Manual Do Utilizador

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2.13 Fine Adjust R30 again for 100% modulation.

2.14 Set the RF POWER to 25 watts.

2.15  Set the Modulation to 125%

2.16 Adjust R5 until the modulation envelope peak just begins to be limited as indicated by flat-

topping.

2.17 Reduce Modulation to 95%

2.18 Set the RF Power to the normal allowed output Power

2.19 Set the Mode to IDENT

2.20 If the optional Audio PCB is included proceed to the SLP10020 alignment section

2.21 This completes Digital I/O alignment

                         PRELIMINARY SET-UP

2.1

Successful alignment of this PCB requires a fully functional system and a previously 
aligned  Digital I/O PCB 

2.2

Verify that all ac and dc power switches are turned off 

2.3

Disconnect the main AC input by either unplugging the unit from the mains or turning OFF 
the main USER supply breaker.

2.4

An audio test generator with a 600 Ohm variable output calibrated from +10 to -40 dbm is 
required.

2.5

Connect the Audio Generator output to TB6 on the  User Interface PCB in the USER 
section.  Connect the individual wires as follows:  (see assembly drawing SAP10006)

+Audio to TB6-1
- Audio to TB6-2
  Shield to TB6-3

2.6

Remove the Digital I/O PCB from the Control Monitor Section and set JP1 to 1-3  and JP2 
to 1-2 . Install the piggyback Audio PCB  (see drawing SAP10020 for details)

2.7

Set The Audio PCB Jumpers JP1 to 1-3, JP2 to 1-2

2.8

Place the Digital I/O PCB on an extender and re-install it.

2.9

Re-establish the main AC Power source. 

2.10 Connect a PC to the Controller / Monitor local port with an RS232 null modem cable. 

2.11 Turn the PC on and Load and Run the USER  Software supplied with the System

2.12 Turn on AC main power switch

2.13 Turn on the Controller / Monitor AC Distribution power switch

2.14 Turn the Transmitter 1 AC Distribution power switch ON

2.15 On the PC click on Open Port

2.16 Click on ID CONFIG and set up for the normal frequency of operation.