TM 11-5895-846-14
d. Downconverter. The downconverter unit per-
(a)
Frequency synthesizer, A1.
forms single or double downconversion from an SHF
(b)
70-MHz channel, A2.
input to a 70/700 MHz modem interface. Tuning is
(c)
adjustable in 1-kHz intervals over a frequency range of
700-MHz channel, A3.
7250 MHz to 7750 MHz by the use of direct-reading,
(d)
Power supply, PS1.
decade, front-panel switches. No tuning is required in
(e)
700 MHz WB filter, FL1.
the terminal for signal reception other than in this unit.
(f)
700 MHz NB filter, FL2.
generated in a frequency synthesizer subassembly
located in the downconverter. It is a separate removable
downconverter unit. The modules within the frequency
unit and is identical to the one used in the upconverter.
synthesizer are not shown. Figure 3-3 shows the front
(1) The downconverter is a completely
panel layout of the downconverter.
independent operating unit requiring only 115-volt line
power for its operation.
It consists of six major
components:
6-34