TB 9-6625-2171-35
(6)
Adjust A3L2 (fig. 4) for frequency counter indication of 334.55000 (334.1000)
MHz. Repeat a(8) and (9) above for best compromise (R).
(7)
Adjust A1L2 (fig. 4) for frequency counter indication of 75.00000 MHz (R).
15. RF Level Output
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.
(3)
Short A6J9 (fig. 3) to ground.
(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.
(9)
Remove short from A6J1.
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).
16. VOR Modulation
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.
