8
Check Mark Indicates the fiber connector type
9
Mode
Selection
Switch
Indicates the operating mode, there are two selections:
·RFoG Low power receive ,ode, receiving optical power is
-20~-5dBm;
·Normal The normal output receive pattern, the receive
optical power is -5~0dBm, with AGC
10
Power Switch
and Socket
Power and display for electric circuit, AC 110V, 60Hz
exchange input plug
11
Ground Pole Uses to ground the housing
3
、
Principle of MX4RR –LI low power return path optical receiver
Figure 3
MX4RR –LI low power return optical receiver has is fully functional; it has an
excellent RF signal amplifier and flatness correction circuit. Modulation laser signal
feeds into optical receiver detectors, converts optical signals to RF signals. In order to
avoid excessive or too high RF signal level caused by optical modulation increases,
the attenuator is designed after the amplification stage, CPU controls adjust the RF
signal level. CPU control displays the circuit and is also responsible for the collection
and display of relevant parameters, basis warning, and at the same time, it is also
responsible for the display and the external communications capabilities.
