Revision:
A
5
Test circuits
The following circuits should be used for tuning the Tx RF filter using the tuning adapter P3LL and
the HMI600. The P4LT/P4LU generates the required tuning tones.
5.1
Test circuit for 40 W units
P4LT/U
Fig. 1: Test circuit for tuning 40 W units. Tuning coil L1 or L2 dependent on switch S1.
5.2
Test circuits for 80 W units
P4LT/U
Fig. 2: Test circuit for tuning L1 in the lower power amplifier rack.
P1LA
E5TX
U
OUTPUT
P1LA
P1LA
E5TX
U
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EN
6/7
L2
OFF
L1
FILTER
S1
OUT
S2
TUNE
FILTER
P3LL
P3LG
L2
L1
FILTER
P3LL
OUTPUT
1KHW001492-EN
ON
S3
P3LE
600134A3.VSD
OFF
ON
S1
S3
P3LE
OUT
S2
TUNE
FILTER
600134A4.VSD