Frequency Response

TM 11-6625-2781-14&P-2

Section IV

PERFORMANCE TESTS (cont'd)

4-26. Frequency Response (cont'd)

ANALYZER Control Settings (cont'd)

LINEAR SENSITIVITY ................................ ................................ ................................ ............................... 2 mV/DIV

VIDEO FILTER ................................ ................................ ................................ ................................ .................. OFF

SCAN MODE ................................ ................................ ................................ ................................ ....................... INT

SCAN TRIGGER ................................ ................................ ................................ ................................ ............ AUTO

608E/F:

MODULATION................................ ................................ ................................ ................................ .................... CW

ATTENUATION ................................ ................................ ................................ ................................ ........... -30 dBm

MEGACYCLES................................ ................................ ................................ ................................ ..................... 10

FREQUENCY RANGE................................ ................................ ................................ ................................ ............ A

AMPL TRIMMER ................................ ................................ ................................ ........Press and peak meter reading

8405A:

FREQUENCY RANGE - MHz ................................ ................................ ...Setting compatible with 608E/F frequency

CHANNEL ................................ ................................ ................................ ................................ .............................. A

AMPLITUDE RANGE - dB ................................ ................................ ................................ ................................ ... -30

2. Adjust the analyzer FREQUENCY control to place 10 MHz input signal on the far left (-5) graticule line. Adjust

LINEAR SENSITIVITY vernier for 7 divisions signal amplitude.

3. Tune the 608E/F signal generator from 10 MHz to 110 MHz keeping its amplitude constant by monitoring the 8405A

RF Voltmeter. Be sure to peak the 608E/F AMPL TRIMMER when changing ranges. Note the frequency at which

the analyzer response is maximum and reset the display amplitude at this frequency to 7.4 divisions. The frequency

response of the analyzer should be between 6.6 and 7.4 divisions from 10 MHz to 110 MHz.

6.6

7.4 DIV

4. Note the display amplitude at 10 MHz.

6.6

7.4 DIV

Figure 4-10. Frequency Response Test: 1 kHz to 10 MHz

4-14