MINI-LINKEandEMicro
of the received 140 MHz signal (through a control signal effecting the division
number in the IF PLL).
3.5.2.9 RSSI
A portion of the 140 MHz signal is fed to a calibrated detector in the RSSI
(Received Signal Strength Indicator) to provide an accurate receiver input level
measurement. The measured level is accessible either as an analog voltage at
the alignment port or in dBm through the operation and maintenance system.
3.5.3 Filter Unit
3.5.3.1 RF Loop
The RF Loop is used for test purposes only. When the loop is set, the transmitter
frequency is set to receiver frequency and transferred to the receiving side.
3.5.3.2 Branching Filter
On the transmitting side, the signal is fed to the antenna through an output
branching filter. The signal from the antenna is fed to the receiving side through
an input branching filter. The antenna and both branching filters are connected
with an impedance T-junction.
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AE/LZT 110 2012 R8C 2002- 03-04
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