HR
X
-C-HB-1
C-B
AND
L
INK
H
ANDBOOK
15
SW1 Top DIP switch bank
Single transmitter HRT
Single receiver HRR
Not fitted
RXMGC
Not fitted
RX
– 0.5dB
Not fitted
RX
– 1dB
Not fitted
RX
– 2dB
Not fitted
RX
– 4dB
Not fitted
RX
– 8dB
SW2 Middle DIP switch bank
Single transmitter HRT
Single receiver HRR
TXMGC
Not fitted
TX
– 0.5dB
Not fitted
TX
– 1dB
Not fitted
TX
– 2dB
Not fitted
TX
– 4dB
Not fitted
TX
– 8dB
Not fitted
SW3 Bottom DIP switch bank
Single transmitter HRT
Single receiver HRR
TX rst
TX rst (not used)
RX rst (not used)
RX rst
SNMP dis
SNMP dis
Tone
Tone (not used)
VSEL
VSEL (not used)
LNB
LNB (not used)
TXAGC
TXAGC(not used)
RXAGC (not used)
RXAGC
When viewed in the orientation illustrated, switching the DIP to the LEFT is OFF (clear) and to the
RIGHT is ON (set)
2.4.2.1 DIP switches - receiver MGC
The RF gain within the receiver function is the sum of all gain settings on SW1. The RF gain can be
changed in nominal steps of 0.5dB.
For special manual gain control modules record the factory setting of each gain step; this is the preset
gain of the receiver.
RXMGC
ON = Manual gain control, OFF = Software control or at default setting
RX
– 0.5dB ON = Gain increased by 0.5dB nominal, OFF= no gain increase
RX
– 1dB
ON = Gain increased by 1dB nominal, OFF= no gain increase
RX
– 2dB
ON = Gain increased by 2dB nominal, OFF= no gain increase
RX
– 4dB
ON = Gain increased by 4dB nominal, OFF= no gain increase
RX
– 8dB
ON = Gain increased by 8dB nominal, OFF= no gain increase
When MGC is not in use, manual attenuation has to be set to zero, i.e. all poles with the same switch
should return to OFF position. Failure to do so may prevent the module from controlling the gain
correctly.
2.4.2.2 DIP switches - transmitter MGC
The RF gain within the transmitter function is the sum of all attenuator settings on SW2. The RF gain
can be changed in nominal steps of 0.5dB.
For special manual gain control modules record the factory setting of each gain step; this is the preset
gain of the transmitter.
