Night Sight to Missile Guidance Path.
During the night sight to missile guidance path (Figure 2-2) the
infrared scene is projected on the scan mirror that reflects the
scene to the 60 element detector. Here it is changed into electrical
impulses, called video, and passed to a 60 channel preamplifier
inside the night sight.
The postamplifier assembly contains an
eight-channel selector and a programmable gain postamplifier.
The
eight-channel selector can select 8 of 56 video input signals.
Selection control (i.e. which input line will be monitored) is made
by five-bit selector lines. A missile guidance set software program
controls these five postamp channel select bits.
The eight-channel
postamp provides not only video amplification but also some 16
different selectable gain levels.
The postamplifier assembly outputs (video thermal tracker channels
1-8) are sent to the missile guidance set into a multiplexer. This
multiplexer combines the eight video channels to allow this
information to be changed into digital data by an analog to digital
converter located inside the missile guidance set.
Figure 2-2.
Night Sight to Missile Guidance Path.
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MM4812
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