Black Box ME760A-R2, User Manual

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CHAPTER 2: Introduction
2.1.5 R
ECEIVER
The receiver contains several circuits (shown in Figure 2-1 below):
• The RECEIVE FILTER removes all the out-of-band frequencies.
• The AUTOMATIC EQUALIZER is made up of several equalizers activated
according to data rate.
• The digital AGC (automatic gain control) automatically compensates for
the attenuation of the line. You can choose between the two modes of AGC
operations by setting the AGC jumper:
ON: The AGC operates continuously.
CNTR: The AGC is active only when DCD is ON. When DCD is OFF,
the AGC will remain in the state to which it was most recently set.
In full-duplex point-to-point applications, there is no difference between the
two AGC modes of operation.
Figure 2-1. Block diagram for the LDM-MR19.2.