TB 9-6625-2330-24
(d) DATA ENTRY- 13 dBm.
(e) FUNCTION-RF ON to on (red light lit).
(3) Configure measuring receiver spectrum analyzer for 450 kHz center frequency,
and markers off.
(4) Allow display to sweep a few times then set spectrum analyzer for peak search,
listed in table 12.
(5) Spectrum analyzer Mkr1 will indicate less than dBc limit listed in table 12.
(6) Set TI frequency and spectrum analyzer center frequency to next frequency
listed in table 12 and repeat (3) and (4) above.
(7) Repeat (6) above for remaining frequencies listed in table 12.
Table 12. Spectral Purity
Test instrument
Spectrum analyzer
DATA
DATA ENTRY
Harmonic
ENTRY
frequency
Harmonic number
dBc
frequency
level
(MHz)
(MHz)
(dBm)
2d
13
0.450
0.900
<-25
3d
13
0.450
1.350
<-25
2d
13
1
2
<-25
3d
13
1
3
<-25
2d
13
166.666665
333.333330
<-25
3d
13
166.666665
499.999995
<-25
2d
13
250
500
<-25
2d
13
333.333335
666.666670
<-25
3d
13
333.333335
1000.000005
<-25
2d
13
500
1000
<-25
13
2000
1000
0.5
<-20
2d
13
2000
4000
<-25
(9) Press TI pushbuttons as listed in (a) through (e) below:
(a) FUNCTION-CARR FREQ.
(b) DATA ENTRY- 100 MHz.
(c) FUNCTION-CARR LEVEL.
(d) DATA ENTRY- 7 dBm.
(e) FUNCTION-RF ON to on (red light lit).
(10) Configure measuring receiver spectrum analyzer for 101 MHz center frequency,
markers off.
(11) Set spectrum analyzer to single sweep mode and take one sweep.
14