TB 9-6625-2171-24
a. Performance Check
(1) Connect power meter to TI J1. If power meter does not indicate greater
than -20 dBm, perform b (1) below.
(2) Set MKR BCN PWR switch to OFF and VOR PWR switch to ON.
(4) Move power meter connection from J1 to J3. If power meter does not indicate
greater than -10 dBm, perform b (2) below.
(5) Set VOR PWR switch to OFF and LOC PWR switch to ON.
(6) Remove short from A6J9 and connect to A6J2 (fig. 3). If power meter does not
indicate greater than -10 dbm, perform b (3) below.
(7) Set LOC PWR switch to OFF and GLIDE SLOPE PWR switch to ON.
(8) Remove short from A6J2 and connect to A6J1 (fig. 3). If power meter does not
indicate greater than -20 dbm, perform b (4) below.
b. Adjustments
(1) Adjust A1C18 (fig. 4) for indication greater than -20 dBm. If indication is less
than -20 dBm, adjust A1C18 for maximum indication and then adjust A1L8 (fig. 4) for
indication greater than -20 dBm (R).
(2) Adjust A5C18 (fig. 4) for indication greater than -10 dBm. If indication is less
than -10 dBm, adjust A5C18 for maximum indication and then adjust A5L8 (fig. 4) for
indication greater than -10 dBm (R).
(3) Adjust A4C18 (fig. 4) for indication greater than -10 dBm. If indication is less
than -10 dBm, adjust A4C18 for maximum indication and then adjust A4L8 (fig. 4) for
indication greater than -10 dBm (R).
(4) Adjust A3C18 (fig. 4) for indication greater than -20 dBm. If indication is less
than -20 dBm, adjust A3C18 for maximum indication and then adjust A3L8 (fig. 4) for
indication greater than -20 dBm (R).
a. Performance Check
(1) Set GLIDE SLOPE PWR switch to OFF and VOR PWR switch to ON. If VAR
light is illuminated, press light to extinguish.
(2) Connect measuring receiver power sensor module to TI J3. Position measuring
receiver controls to measure AM.
(3) Press and hold VOR 30VAR and 30REF pushbuttons. If measuring receiver
does not indicate between 27 and 33 percent, perform b (1) below. Release VOR 30VAR
and 30REF pushbuttons.
(4) Short A6J12 (fig. 3) to ground, using lead and adapters. If measuring receiver
does not indicate an amplitude modulation between 27 and 33 percent, repeat b (1) below
for best intolerance compromise between a (3) and (4).
