TB 9-6625-1914-24
(6) Adjust signal generator frequency and amplitude control as necessary to set
frequency 900 MHz above frequency recorded in (4) above. Signal pip will move to
within 0.9 division of ninth graticule line to right.
(7) Adjust FREQUENCY control to 200 MHz and set SCAN WIDTH PER
DIVISION switch to 10 MHz.
on display (-5) (approximately 150 MHz). Record signal generator frequency indication.
(9) Increase signal generator frequency 80 MHz above frequency recorded in (8)
above. Signal pip will move within 0.8 division of ninth graticule line to right ( 3).
(10) Set SCAN WIDTH PER DIVISION switch to 1 MHz and BANDWIDTH
switch to 10 kHz.
(11) Repeat (4) and (9) above except in (4) above the approximate frequency will be
195 MHz and in (9) above increase signal generated by 8 MHz.
(12) Connect equipment as shown in figure 5.
(13) Set signal generator controls as necessary for external modulation.
(14) Set SCAN WIDTH PER DIVISION switch to 50 kHz and BANDWIDTH
switch to 3 kHz.
(15) Set TUNING STABILIZER to ON (up).
(16) Adjust function generator no. 1 frequency to 50 kHz and amplitude control, as
necessary, to produce 50 kHz modulation pips on display.
(17) Adjust FREQUENCY FINE TUNE control to align a 50 kHz modulation pip
with the far left graticule line. Eighth modulation pip to the right will coincide within
0.8 division of ninth graticule line to right ( 3).
(18) Set SCAN WIDTH PER DIVISION switch to 20 kHz.
(19) Adjust function generator no. 1 to 20 kHz and repeat technique of (15) through
(17) above.
b. Adjustments
(1) Connect TI to extender (supplied with TI) and connect extender to display section.
27 a before making adjustments.
27. Tuning Dial Accuracy
a. Performance Check
(1) Connect signal generator to RF INPUT.