Operating instructions

3-8 Amplifier Setup
Figure 3-3
Flatness controls
You can adjust the variable resistors and capacitors on the MDR board to flatten the response
across the passband. Use C1, C2, C3, R1, R2, R4, L3, L4, L7, and L8 on the MDR board
(illustrated in Figure 3-4) to obtain a flat response.
Figure 3-4
MDR/10/1G/* board – top (left), bottom (right)
To obtain maximum flatness:
1 On the main board, adjust the variable capacitor C8 (Figure 3-5) to minimum capacitance to
place the peak out of the bandwidth.
This should not need adjusting as it is properly set during manufacturing.
2 On the MDR/10/1G/* board adjust:
a. R2, C2 for the roll-off at the lowest forward frequency caused by cut-off of the diplex
filters.
b. R1, C1 for just above the lowest forward frequency.
c. R4, C3 for the mid-frequency.
d. L3, L4, L7, and L8 for the upper end of the bandwidth.
MBV3-100* Installation and Operation Manual