Directional Coupler Test Points; Bode Equalization; Figure 3-3 Ldr/9/1G Component Layout (Top-Left, Bottom-Right) - Motorola BLE100 Installation And Operation Manual

3-8 Amplifier Setup
C2 produces a peak that is centered approximately 50 MHz above the lowest forward
frequency and varied in amplitude by R2.
C3 produces a peak that is centered approximately 300 MHz above the lowest forward
frequency and varied in amplitude by R3. This adjustment provides more mid-band
alignment flexibility.
C6 adjusts for maximum gain at Fmax (1003 MHz).
C7 and R8 adjust for the flattest response in the mid- to upper-portion of the band.
C8 adjusts for the flattest response in the low-to mid-range of the band.
L4, on the bottom of the LDR board, may slightly tune the upper portion of the response.
Excessive spreading of L4 will cause insertion loss to increase.
Figure 3-3
LDR/9/1G component layout (top-left, bottom-right)

Directional Coupler Test Points

Accurate −20 dB directional-coupler test points are available at the input and at the output of
the BLE100. Because these test points are 75-ohm source impedance, they do not require special
test probes.
After the output hybrid, a second directional coupler provides signal to the optional ADU board.
This signal is used only when the ADU board is installed. It is not necessary to terminate this
port when the ADU is not installed. Do not remove the ADU pad even if there is no ADU
installed. Removing the pad affects the test point at port

Bode Equalization

The Bode board, which is an electronically controlled equalizer, receives its control input from
either the ADU or QADU control board. The response of the Bode board compensates for cable
attenuation changes due to temperature. If necessary, you can control the Bode board manually
using the potentiometer labeled Manual Level (
BLE100 Installation and Operation Manual
.
OUT
) in Figure 2-8.
MAN