TM 11-5840-360-14-1-1
Table 2-12 Switching Units Internal Jumpers (Cont'd)
Dual Radar (V4) Jumper List for Three Indicators
Dual Radar (V4) Jumper List for Three Indicators
(Cont'd)
(Cont'd)
IV.
Switching Unit No. 2 (10)
A. Connect 75-ohm coax between J1 (center
conductor) and S1B27-A; connect shield
A. Connect 75-ohm coax between J1 (center
to A1E10A.
conductor) and S1B27-A; connect shield
B. Connect 75-ohm coax between J2 (center
to A1E10A.
conductor) and S1B25-A; connect shield
B. Connect 75-ohm coax between J2 (center
to A1E5A.
conductor) and S1B25-A; connect shield
C. Link TB2-2 to TB2-3 to TB2-4
to A1E5A.
C. Link A1E18 to A1E5A
D. Link TB1-2 to El
D. Link TB2-2 to TB2-3 to TB2-4
VI. Receiver Transmitter I (20 KW Receiver
Transmitter) (3)
E. Link S1B25-F to A1E17
A. Pulse and Driver PCB A1100
F. Link S1B22-F to A1E19
1. Link A1 to D1
2. Link A2 to D2
V.
Switching Unit No. 1 (9)
3. Link A3 to D3
4. Link E1 to F1
2.9 WAVE GUIDE SWITCH SA-2140 (V2)
2. Mating surfaces of dissimilar metals should be
coated with a silicone compound such as Dow Corning
2.9.1 Waveguide Terminations, Locations and Support
DC4, (Part Number 230-1014P3) to prevent corrosive
(V2)
action.
The waveguide switch has three choke type
2.10.2 Mounting Instructions (V2, V3, V4)
waveguide flanges (see Figure 2-14) to mate with X-
band waveguide type UG-39/U or UG-135/U. The
The video amplifier units should be bulkhead
waveguide switch is installed in and supported by the
mounted near the receiver transmitter units to provide
waveguide between the receiver transmitters and the
convenient access.
Sufficient clearance must be
provided for ventilation and maintenance (see Figure 2-
2.9.2 Mounting Instructions (V2)
2.10.3 Cable Connections (V2, V3, V4)
The waveguide switch is installed in the waveguide
between the receiver transmitters and the antenna. The
Cable connection data required for the video
switch should not be more than 15 feet from either
amplifiers is provided in Figures 2-2 (V2), 2-3 (V3), 2-4
receiver transmitter. Installation data is provided in
(V4) and 2-15.
2.11 ANTENNA PEDESTAL AB-1248 AND ANTENNA
2.9.3 Cable Connection (V2)
AS-3195 (V4)
The only cable connection required for the
The antenna pedestal shall be bolted to a flat
waveguide switch is the power cable from the interface
horizontal mounting plate which is welded to a 6-inch
unit (see Figures 2-2 and 2-14).
diameter mast or bracket assembly (see Figures 2-5 and
2.10 VIDEO AMPLIFIER AM-6932 (V2, V3, V4)
location and size of the pedestal mounting holes are
shown in Figure 2-16.
2.10.1 Mounting Hardware (V2, V3, V4)
The preferred method of antenna installation is to
mount the antenna pedestal on an existing masthead
When installing the video amplifier, the following
(see Figure 2-5). This type of installation generally
general rules must be observed as applicable:
provides an unrestricted antenna radiation pattern.
1. Corrosion-resistant (i.e.
stainless
steel)
mounting hardware should be used.
2-52
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