 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|
  TB 9-6625-2182-35
13. Spectral Purity
a. Performance Check
(1) Connect spectrum analyzer INPUT 50 Ω to TI OUTPUT RF.
(2) Connect TI EXT REF INPUT (rear panel) to spectrum analyzer 10 MHz REF
OUT (rear panel).
(3) Press INSTR PRESET pushbutton.
(4) Perform steps as listed in (a) through (c) below for each row in table 9 below:
(a) Press ENTRY - FREQ pushbutton and enter DATA frequency listed.
(b) Press ENTRY AMPTD pushbutton and enter DATA amplitude listed.
(c) Set spectrum analyzer to TI frequency, set power reference then tune to
harmonic frequency listed. Power amplitude will be less than dBc specified limit.
NOTE
Some spurious signals may be generated by the spectrum
analyzer. If a spurious signal is present, change TI frequency.
If it disappears, it most likely is from the TI. If the spurious
signal moves with the TI frequency it most likely is in the
spectrum analyzer.
Test instrument
Spectrum analyzer
Harmonic
DATA
DATA
frequency
frequency
amplitude
dBc
(MHz)
(MHz)
(dBm)
5
.450
.900
<-25
5
.450
1.35
<-25
5
1
2
<-25
5
1
3
<-25
5
1.5
3
<-25
5
166.666667
333.333333
<-25
5
166.666667
500
<-25
5
250
500
<-25
5
333.333333
666.666666
<-25
5
333.333333
1000
<-25
5
500
1000
<-25
5
2000
4000
<-45
5
2000
1000
<-25
(5) Perform steps as listed in (a) through (c) below for each row in table 10 below.
(a) Press ENTRY - FREQ pushbutton and enter DATA frequency listed.
(b) Press ENTRY AMPTD pushbutton and enter DATA amplitude listed.
(c) Set spectrum analyzer to TI frequency, set power reference then tune to
harmonic frequency listed. Power amplitude will be less than dBc specified limit.
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals