TB 9-6625-2329-24
Table 10. Spectral Purity
Test instrument
Spectrum analyzer indications
DATA and
DATA and
ENTER/UNITS ENTER/UNITS
frequency
(dBm)
(MHz)
(MHz)
(dBc)
13
.1
.2
<-30
13
.500
1
<-30
13
1
2
<-30
13
2
4
<-30
13
4
8
<-30
13
10
20
<-30
13
32
64
<-30
13
125
250
<-30
13
375
750
<-30
13
500
1000
<-30
13
1000
2000
<-30
(4) Adjust controls as listed in (a) through (c) below for each row in table 11 below:
(a) Press TI PARAMETERRF pushbutton, enter DATA numerical value, and
press ENTER/UNITS MHz key.
(b) Press TI PARAMETERLEVEL pushbutton, enter DATA numerical
value, and press ENTER/UNITS dBm key.
(c) Set spectrum analyzer to TI frequency; set power reference, then tune to
Table 11. Spurious Signals
Test instrument
Spectrum analyzer indications
DATA and
DATA and
ENTER/UNITS
ENTER/UNITS
frequency
(dBm)
(MHz)
(MHz)
(dBc)
0
31
26
<-70
0
31
57
<-70
0
31
150
<-70
0
31
181
<-70
0
195
150
<-80
0
195
169
<-80
0
988
741
<-70
0
988
962
<-70
0
988
988.1
<-70
(5) Press PARAMETERLEVEL pushbutton and press ON/OFFOFF key.
(6) Disconnect all TI connections from spectrum analyzer.
b. Adjustments. No adjustments can be made.
12. Modulation Generator
a. Performance Check
(1) Connect equipment as shown in figure 6.