Operating instructions

Amplifier Setup 3-7
The information in Table 3-2 is shown as a graph in Figure 3-2:
Figure 3-2
Frequency versus cable slope
0
1
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
40
45
50
72
108
150
211
250
300
350
400
450
550
750
870
1003
Cable slope (dB)
Frequency (MHz)
SCS-10
SCS-9
SCS-8
SCS-7
SCS-6
SCS-5
SCS-4
SCS-3
SCS-2
SCS-1
Input, Midstage, and Output Pads
Install model JXP-*B pads to attenuate the signal per system design drawings. Generally, this
consists of attenuating excessive input levels. You should pad the input to system level for unity
gain. Select and install the specified pad in the socket labeled
JXP-IN on the amplifier cover.
You can use the midstage pad (JXP) and output pads (JXP2 and JXP3/4) to adjust the gain level
and achieve the gain specification. Refer to Section 6, “Operating Tips” for midstage/output
padding information and recommendations.
Flatness Control
All amplifiers are factory-aligned for optimal station flatness therefore, there is usually no need
to adjust the MDR board. However, you can make minor adjustments, if necessary to achieve
flatness across the passband.
The MDR/10/1G/* board includes flatness controls and a fixed cable equalizer for 1003 MHz.
This equalizer, plus the contribution of the hybrid gain stages, produces approximately the dB
of slope indicated by the model number (14 dB of tilt with an MDR/10/1G/*).
Adjust the MDR/10/1G/* board to correct peak-to-valley response variations. Figure 3-3
illustrates the location of the MDR/10/1G/* board. Adjust or replace the MDR/10/1G/* if the
response exhibits tilt.
MBV3-100* Installation and Operation Manual