a. Place SURVEILLANCE-FINAL APPROACH-HEIGHT FINDER switch S2802
to SURVEILLANCE (Figure 42).
b. Place SCAN switch S305 to ON (Figure 37).
d. Place IFF switch 51502 to ON (Figure 56).
A second sweep will appear on the CRT in IP-800/FPN-40.
f. Adjust IF GAIN AZ control and RADAR GAIN control on the
IP-800/FPN-40 for optimum video on the IP-800/FPN-40 display (CRT).
IF GAIN AZ control is adjusted-correctly when maximum
intensity of video is present (IF GAIN AZ control maximum
g. Perform LO tune to ensure that the local oscillator output is
30 MHz higher in frequency than the received radar RF signal.
RADAR GAIN should be adjusted for maximum intensity of
video, just below the point where the video intensity
starts to bloom.
i. Adjust HOR IFF ADJ control R1644 and VERT IFF ADJ control
R1645 (Figure 57) to center the origin of the IFF display on the CRT
k. Adjust HOR IFF OFF CENTERING control R1517 and VERT IFF OFF
CENTERING control R1518 (Figure 57) to place the origin of the IFF
display on the CRT in IP-800/FPN-40 to correspond with the placement
of the IFF antenna. If the radar and IFF antennas are so close that
the IFF antenna is not visible on IP-800/FPN-40 display, superimpose
radar and IFF sweep origins.
l. You would repeat i through k above until radar and IFF sweep
origins are superimposed for all ranges.
(Figure 58 shows the CRT
with the IFF display properly aligned.)