ABB ETL600 - 5 Test Circuits

Revision: Language: Page:
A EN 6/7
1KHW001491-EN
5 Test circuits
P4RX
P4LM P7LC
S2 S1
TUNE
FILTER
SET
NORM
IN
OUT
L1
L2
S3
L1
L2
L3
50 / 75
Ω
/
∞
P4LT
P1LA
U
OUTPUT
FILTER
TUNE
OUT
S2
S3
S1
OFF
ON
L2
L1
FILTER
P3LL
Ext.Coaxial Cable
RF Hybrid
not to be
plugged
FUNCTION
A
B
Figure 1: Test circuit for tuning L1 and L2 on P4RX
Notes:
1. For checking the signal path from P4LT to BNC IN of P4LM, switch S1 of P4LM can be put to
position SET. Then BNC IN of P4LM is directly connected to BNC OUT of P4LM.
2. Normally S1 of P4LM is set to NORM.
3. On P4LM, jumper S3 has to be in position L1 to tune P4RX coil L1 and in position L3(!) to tune
P4RX coil L2. Position L2 of jumper S3 on P4LM is not used!