TB 9-6625-2330-24
(6) Using spectrum analyzer, measure top to bottom of square wave in dB. Pulse
envelope on/off ratio will indicate within limits specified in table 15.
Table 15. Pulse Modulation.
Spectrum analyzer (>dB)
60
(7) Set TI FUNCTION-RF ON to off (red light extinguished).
(8) Connect equipment as shown in figure 2.
Figure 2. Pulse Modulation Risetime Hookup.
(9) Configure pulse generator output for a period of 20 s and a pulse width of 15 s.
(10) Set TI FUNCTION-RF ON to on (red light lit).
(11) Set oscilloscope input impedance to 50 Ω.
(12) Using oscilloscope measurement techniques, verify risetime of displayed
envelope is within limits listed in table 16.
Table 16. Risetime.
Oscilloscope (< ns)
25
(13) Using oscilloscope measurement techniques, verify falltime of displayed
envelope is within limits listed in table 17.
Table 17. Falltime.
Oscilloscope (< ns)
25
(14) Set TI FUNCTION-RF ON to off (red light extinguished).
b. Adjustments. No adjustments can be made.
17