TM11-5840-360-14-1-1
In the (V2) system, using one switching unit,
dummy load (position 2). Status signals from the
interface is provided between the indicators and the
waveguide switch to the interface unit provide a visual
video amplifiers. There are six modes available in the
indication of the position (1 or 2) of the switch.
(V2) system.
In the (V3) system, using two switching units,
4.6.2 Signal Switching Circuit (V2)
interface is provided between the indicators and the
video amplifiers. In the standard system (three
The signal switching circuit routes resolver drive
indicators) twelve modes are available. If the optional
and compensation signals between the active receiver
fourth indicator is installed, sixteen modes are available.
transmitter and the antenna pedestal.
The combination of the switching unit settings
Resolver drive relay K3, when deenergized
determines the system mode.
(modes DP-1 and DP-2) routes the resolver
In the (V4) system, using two switching units,
drive/compensation signals between receiver transmitter
interface is provided between the S-band receiver
I and the pedestal. When modes DP-3 or DP-4 are
transmitter and the indicators/signal data converters,
with ten modes available.
drive/ compensation signals between receiver
transmitter II and the pedestal.
4.5.1 Signal Switching Circuits (V2, V3, V4)
4.6.3 Signal Feedthrough Circuit (V2)
Functional signal routing charts are provided in
The following signals to both receiver
the signals, the source, the switching unit switch and
transmitters are applied through the interface unit from
wafer, and the destination.
the antenna pedestal:
4.5.2 Signal Splitting Circuits (V2, V3, V4)
a.
Resolver outputs R1 through R4
b.
Heading flash trigger
c.
Antenna safety switch
The signal splitting circuits of the switching units
d.
Antenna Stop
are completely passive and do not alter signals or
voltages in any way. Video and acknowledge pulse
signals are split to generate two half-amplitude signals.
4.6.4 Power Supply (V2)
4.6 INTERFACE UNIT J-3463 (V2)
The output of power supply PS-1, +28 Vdc is
applied to the switching unit and to the waveguide
The interface unit, remotely controlled by the
switch.
switching unit, provides routing and switching of control
and status signals between the receiver transmitters,
4.7 WAVE GUIDE SWITCH SA-2140 (V2)
indicators, waveguide switch and the antenna pedestal.
The waveguide switch is a two-position four-
unit.
port, X-band RF switch which enables selection of one
of two receiver transmitters (MTR' ) to use a single
s
4.6.1 Waveguide Switch Control Circuits (V2)
antenna. Figure 4-8 is a functional block diagram of the
waveguide switch.
The spring-loaded waveguide switch normally
4.7.1 RF Switch Circuit (V2)
connects the output of receiver transmitter I to the
antenna pedestal rotary joint and the output of receiver
transmitter II into a dummy load (position 1).
Two of the four ports of the waveguide switch
When mode DP-3 or DP-4 is selected, a
are connected to the two X-band receiver transmitters,
one port is connected to the antenna pedestal and the
switched 28V (position 2 command) signal from the
switching unit is routed through the interface unit to the
other port is connected to the dummy load. In modes
DP-1 and DP-2, the switch solenoid is deenergized and
waveguide switch. This command signal causes the
waveguide switch to connect the output of receiver
receiver transmitter I is connected to the antenna and
transmitter II to the antenna pedestal rotary joint and the
receiver transmitter II is connected to the dummy load
output of receiver transmitter I into a
(position 1). In modes DP-3 and DP-4, the switch
solenoid is energized and receiver transmitter II is
connected to the antenna and receiver transmitter I is
connected to the dummy load (position 2).
4-9
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