Operation Manual

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Note that the adjustment values incorporate both a modulation level setting and a small,
unpredictable, correction for individual variation on the low frequency generator boards
(LF1223). The correction is shown after the “±” sign in Typical TX adjustment values.
Table B-5 Typical TX adjustment values
B.10 User administration configuration
The following user are set up on new equipment:
Username: MASTER
Password number 1: MASTER1
Password number 2: MASTER2
Password number 3: MASTER3
These passwords should be changed after the commissioning.
B.11 Frequency configuration strap settings
This section defines the strap settings on the OS1221A (LLZ) and OS1221B (GP) for the stan-
dard ICAO Annex 10 ILS frequencies.
The strap settings for each frequency and equipment type are shown in Table B-6 and Table
B-7. The straps are numbered from A0 to A5 and N0 to N9. A0 is the bottom strap in two
groups of straps. (when the board is held as inserted in the cabinet).
An “X” character in the table means the strap must be inserted. A blank means the strap must
be removed.
Parameter Values for LLZ (15 W) Values for GP (5 W/0.5 W)
Course RF Power 152 ± 8 115 ± 5
Course Mod Bal. 3078 ± 25 3100 ± 50
Course Mod Sum 3090 ± 25 2760 ± 50
Course Mod Id. 127 ± 10 (8 % ident. mod.)
150 ± 10 (10 % ident.
mod.)
N/A
Clearance RF Power 152 ± 8 52 ± 5
Clearance Mod Bal. 3078 ± 25 1515 ± 20
Clearance Mod Sum 3090 ± 25 2760 ± 40
Clearance Mod Id. 127 ± 10 (8 % ident. mod.)
150 ± 10 (10 % ident.
mod.)
N/A