TB 9-6625-2197-40
(6) Set control box PWR switch to ON and RPT switch to GND, then TEST.
(7) Adjust radar test set oscilloscope main TRIGGER LEVEL and HORIZONTAL
position controls to place positive leading edge of sync pulse from pulse generator (CH2) on
second graticule line. If waveform (fig. 6, inset H) is not present, adjust radar test set RF
output power level until waveform is just solid.
NOTE
A pulse just solid is characterized by a narrow pulse width (at
0.5 s wide) having a low intensity trailing edge, additionally,
as the radar test set RF power is increased from at -28 dBm
through -24 dBm (ideal) to near -21 dBm, a noticeable change
will occur in the pulse width and negative amplitude to a point
little or no additional effect. See figure 12 below for example.
Figure 12. Example of Just Solid Waveform Display.
(8) If RF power output level of the radar test set (at the just solid waveform point),
including the insertion loss of circulator and cable, is not between -22 and -26 dBm, perform
b (1) and (2) below. Record actual value.
(9) Move radar test set oscilloscope probe from TJ 28 connector and place in TJ 29
connector of control box.
(10) Adjust radar test set power output to -21 dBm (include circulator and cable loss).
(11) Adjust radar test set oscilloscope TIME/DIV control to 500 ns.
(12) If radar test set oscilloscope does not display waveform (fig. 6, inset I), adjust
radar test set RF power output level until waveform is just solid.
(13) If RF power output level of the radar test set (at the just solid waveform point)
including insertion loss of circulator and cable, is not between 2 to 4 dBm greater than (8)
above, perform b (3) and (4) below.
21