TB 9-4931-527-40
Figure 4. First carrier null of carrier frequency.
(8) Set function generator frequency to 640 kHz.
(9) Connect equipment as shown in figure 3, CONNECTION B, using frequency doubler.
(10) Adjust spectrum analyzer until the second harmonic of the doubled carrier
frequency signal (approximately 1600 MHz) can be observed. Again, use optimum settings
(7) above. Note function generator output level dBm setting.
(12) Readjust function generator output level for a carrier null on spectrum analyzer,
change will be less than 0.04 dBm of output level noted in (11) above.
b. Adjustments. No adjustments can be made.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.