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DVOR 432
Operation and Maintenance
Alignment Procedure
Annex Nextfield
AN-23
Ed. 01.04
b) Minimize SB1 power: Connect scope to 1b5 and 1b7 of connector
A/TS
T1 SBA Power Level
TEST on motherboard ASU/A. Reduce SB1-power until clipping of
--,-%
peaks of sinus signal. Then increase SB1 power by 5 % (relative).
NOTE:
Range of values: 0...99.9, note down value!
c) Minimize SB2 power: Connect scope to 1b6 and 1b8 on
A/TS
T1 SBB Power Level
TEST card and perform as described in b).
--,-%
NOTE:
Range of value: 0...99.9, note down value!
4.6.1.5
30 Hz AM Modulation Depth
a) Set 'T1 Mod. Depth 30 Hz AM' so that 'M1 Mod. Depth 30 Hz AM'
A/TS
T1 Mod. Depth
becomes 30 %.
30 Hz AM --,-%
NOTE:
Range of values: 0...40.0
4.6.1.6
Preadjustment of Azimuth
a) Set "Start Antenna Normal Operation" to antenna 1.
A/TS
T1 Start Antenna
Normal Operation
Antenna-1
b) Set azimuth alignment of transmitter to obtain the azimuth reading
T1 Azimuth alignment
of the monitor dipole.
---,-°
NOTE:
Measurement only with field dipole in use,distance >100 m. Range
of values: 0...359.9 (assume 0, if working with simulator test setup).
4.6.1.7
Identity- and Voice-Adjustment
a) Set mod. depth identity to e.g. 10 %.
A/TS
T1 Mod. Depth
Identity AM --,- %
NOTE:
Range of values: 0...20.0.
b) If applicable set mod. depth voice to e.g. 20 %.
A/TS
T1 Mod. Depth
Voice AM --,- %
NOTE:
Range of values: 0...40.0.
c) Switch off TX1.
C
Switch TX1 Off
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