Section I
Paragraphs 1-9 to 1-12
signal generator to the receiver under test when the
the cover (figure 1-2) of the signal generator case
receiver has a 95 ohm balanced input.
(case 1) and in a separate Accessory Case CY-868/U
(4, figure 1-1). They consist of power and r-f cables,
e. Four Bristol wrenches and two Phillips screw-
antenna, adapters and tools.
drivers are mounted on the signal generator case
cover for use in disassembling the equipment.
a. Three power cables, 10, 25 and 50 feet long, al-
low operation of the signal generator within 85 feet
1-11. R-F SECTION. The r-f section supplies the
of the power source. A power adapter is supplied for
connect ion to a power source without an AN connector.
r-f carrier by mixing the outputs of two crystal con-
trolled oscillators and multiplying the sum frequency
b. Three r-f cables, 10, 25 and 50 feet long, allow
to the desired 108.0- to 135. 9-mc output frequency
operation of the signal generator within 85 feet of the
for test ing navigation and localizer receivers. When
equipment. under test.
testing glide slope receivers, a frequency range 329.3
to 335.0 mc is required. These frequencies are pro-
c. The antenna is telescopic and is used f or overall
duced by mixing the output of the r-f chassis with the
installation checks including the receiving antenna
output of a 200-mc oscillator in the univerter chassis.
system.
1-12. AUDIO SECTION. The audio section generates
d. Five Adapters UG-201/U are used, as required,
the various audio signals required for modulating the
to terminate the r-f cables when connected to a re-
r-f carrier, Stable RC oscillators produce audio fre-
ceiver or to each other. Two Adapters UG-29/U are
quencies of 30 cps, 9960 cps and 1000 cps. By dis-
used, as required, to connect the r-f cables together.
torting the 30-cps signal and selecting the third and
Adapter UG-529/U is used to impedance match the
fifth harmonies, 90 cps and 150 cps are produced.
