Transmit Filter E5Tx - ABB ETL600 Instruction Manual

ABB Switzerland Ltd
X110
+
42V to 58V
X107
-
to X183
X184
1
TXRF12-A
2
TXRF12-B
3
TXRF34-A
4
TXRF34-B
AA
0 ... 2 dBu
24 - 500kHz
150 Ohm
EE FF
Fig. 3-18
3.3.9.

Transmit filter E5TX

The functions of the Tx filter are:
•
It reduces spurious emissions due to non-linearity of the power
amplifier.
•
Its high impedance outside the transmit band enables further PLC
units to be connected in parallel.
•
It protects the output amplifier from the voltage spikes on the
power line caused by power system switching, faults and lightning.
The filter can be programmed for the three bandwidths 8, 16 and
32 kHz. Center frequency and bandwidth of the filter can be selected
with jumpers. Exact tuning of its coils L1 and L2 can be done using the
Tx tuning adapter P3LL and the HMI600 program. Refer to the E5TX
Tuning Instructions in the annex for details.
When the RF hybrid P3LE is configured accordingly, the Tx filter also
filters the Rx-RF signal. This is described in section 3.3.11.
3-30
1KHW001489-EN
Us +38V to 45V
Us
+26V
Imax BIAS
CFB
VFB
P1LA Block Diagram
November 2005
Us
SUPER-
VISION
Tx Alarm
Level adj. Tx
CH CL BB
Alarm
Structure and Function
ETL600
DD
X182
B/D/Z16
HYB-IN
B/D/Z14
GND
B/D/Z28
ZFFILT-IN
B/D/Z26
ZFFILT-GND
B/D/Z30
PAMPOUT-A
nom. 50W
20 Ohm
B/D/Z32
PAMPOUT-B
Z2
RF-RELAY
B2
Z8
TX-ALARM
Z10
RF LINE
X175
B/D/Z20
B/D/Z22
B/D/Z24