Racal Instruments RA-117 User Manual page 9

1 Mc/s input/output:
2nd V. F. O. output/input(3.6 – 4.6 Mc/s)
1.7 Mc/s input/output
R.F. (2 – 3 Mc/s) input:
The above input/output connections are selected by internal linkage, the connections
should be made as follows:-
1 Mc/s input
1 Mc/s output
2nd V.F.O. input
2nd V.F.O. output
1.7 Mc/s input
1.7 Mc/s output
Note 1 When using the internal oscillators with crystals, the connections should be made
for outputs since the cable capacity will pull the internal crystal off frequency.
Note 2 The 1 Mc/s and 1.7 Mc/s crystal must be removed if an external source is applied
to the input socket. Stowage space is provided on the chassis for the crystals when
they are not in use.
AUTOMATIC VOLUME CONTROL.
8. The A.V.C. line is brought out to the terminal strip at the rear of the chassis for such
applications as diversity reception.
Installation
May be used diversity operation.
For diversity operation and external chan-
nelizer crystal oscillator output.
For diversity operation and fine tuning unit
input.
Input from an L.F. converter.
Remove "T" adaptor and place in clip pro-
vided on side of gusset plate. Connect the
free plugs PL12 to SKT3 and connect the
free plug PL2 to SKT2.
Disconnect plugs PL12 and PL2 and con-
nect "T" adaptor to socket SKT2. Connect
plugs PL12 and PL2 to the "T" adaptor.
Connect the free plug PL302 to SKT302.
Connect the free plug PL303A to SKT304.
Connect the free plug PL303A to SKT303.
Connect the free plug PL303A to SKT306.
(blue)
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