TB 9-6625-2333-24
Corrected -3 dB BW = (Actual Span/Ideal Span) x Measured -3 dB BW
Example: RES BW setting = 1 MHz
Ideal Span = 1.0 MHz
Actual Span = 1.05 MHz
Measured -3 dB BW = 913 kHz
Corrected -3 dB BW = (1.05/1.00) x 913 kHz = 958.65 kHz
(24) Calculate -3 dB bandwidth using formula below. Result will be within limits
listed in table 4 for the current TI RES BW setting.
-3 dB BW = 100 x (corrected -3 dB BW - RES BW setting)/RES BW setting
Example: RES BW setting = 1 MHz
Corrected -3 dB BW = 958.65 kHz
-3 dB BW = 100 x (0.95865 MHz - 1.0 MHz)/1.0 MHz = -4.135%
(25) Press TI keys as listed in (a) through (d) below:
MARKER MKR.
(a)
[MARKERS OFF].
(b)
CONTROL TRIG.
(c)
[SWEEP CONT SGL] to select CONT.
(d)
(26) Repeat technique of (4)(h), (j), and (7) through (25) above for remaining TI
(27) Press TI keys and enter values using DATA keys as listed in (a) through
(d) below:
SPAN then [SPAN] to 20 MHz.
(a)
CONTROL BW then [RES BW] to 2 MHz.
(b)
[VIDEO BW] to 300 Hz.
(c)
AMPLITUDE then [LOG dB/DIV] to 10 dB.
(d)
(28) Set synthesizer/level generator AMPLITUDE to -3 dBm.
(29) Press TI keys as listed in (a) through (c) below:
(a) INSTRUMENT STATE CAL.
(b) [ A D J C U R R I F S T A T E ] w a i t f o r I F A D J U S T S T A T U S m e s s a g e s
t o disappear.
(c) MARKER PEAK SEARCH.
(30) Adjust synthesizer/level generator amplitude until TI MKR indicates 0 dBm r1.00 dB.
(31) Set synthesizer/level generator AMPTD INCR to 60 dB.
(32) Set synthesizer/level generator frequency to F1 listed in table 5 for the current
TI RES BW setting.
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