Trimming Elements; Adjusting The Receiver Front End - Adcon A440 Technical Reference Manual

3.3.7.

Trimming Elements

The location of the trimming elements on the A431 Module is shown in Figure 17.
Figure 17.
3.3.8.

Adjusting the Receiver Front End

1. Mount the DUT (Device Under Test) on the testing fixture and connect it to the
2. Select the appropriate instrument profile depending on the device's band.
3. Turn the DUT in permanent receive mode by entering the RX command at the
4. Adjust the FL1 and FL2 filters (see Figure 17) until you obtain a curve similar to
L15 (RX VCO)
L7 (TX VCO)
Location of the trimming elements.
host via the serial cable.
terminal.
the one shown in Figure 18 (depending on the band, the markers may be
different); this is done by successively adjusting the five trimming screws
located on the filters.
FL2 FL1
R75 (Crystal Reference)
Trimming Elements
35