LLZ 421
Alignment Procedure LLZ−2F (Dip./Refl.) Operation and Maintenance
ILS 420
5−18 Ed. 07.08SOAC
5.4.3.4 Adjustment of Position Nearfield Monitor, optional (if available)
a) Set the RF−level of the corresponding path on the SOAC (Fig. 5−2, 5−3) to amplitude of 3.6 Vpp
as described in 5.4.1.
b) Shift nearfield dipole position so that DDM 0.0 % is received. Measure DDM with field receiver.
c) Open dialog ’Monitor1−Nominal Values’ and open dialog ’Monitor2−Nominal Values’. Enter the
measured values for Nearfield DDM.
d) Open dialog ’Transmitter1−Waveform Data#1’. Note down the values of ’CRS SBO Amplitude’
and ’CLR SBO Amplitude’. Set them all to 0.
e) Send to Monitor1/2 the command ’Calibration, Executive Nearfield Pos. detector’ (or ’Executive
Ch. 4 Width detector’).
f) Restore TX1 SBO settings of 5.4.3.4 d) back to normal.
g) Send to Monitor1/2 the command ’Normalization, Executive Nearfield Pos. detector’ (or ’Executive
Ch. 4 Width detector’).
To Next Page
Loading...