TB 9-6625-1914-24
28. Frequency Response
a. Performance Check
(1) Connect equipment as shown in figure 12.
Figure 12. Frequency response - equipment setup.
(2) Position TI controls as listed in (a) through (d) below:
(a) FREQUENCY control to 0 MHz.
(b) BANDWIDTH switch to 300 kHz.
(c) SCAN WIDTH (red) switch to 0-1250 MHz.
(d) INPUT ATTENUATION switch to 20 dB.
(3) Set IF plug-in LOG/LINEAR switch to LINEAR and LINEAR SENSITIVITY
(LOG REF LEVEL) switch to 1 mV/DIV.
(4) Adjust signal generator frequency to 100 MHz and output level to produce a
7-division signal pip display. Note output level of signal generator.
(5) Slowly increase signal generator frequency to 500 MHz while maintaining
output level noted in (4) above. Note frequency which produces highest signal pip
amplitude.
(6) Adjust signal generator output level to produce an 8-division signal pip display
at frequency noted in (5) above. Note signal generator output level at this frequency.
(7) Slowly vary signal generator frequency between 100 and 500 MHz while
maintaining output level noted in (6) above. TI signal pip display will remain between 6.3
and 8 division.
(8) Repeat technique of (2) through (7) above for frequency range of 500 to 1000 MHz.