
10. Frequency Response Test
48.
49.
50.
2
to
22
GHz
51.
(Preselected
Range)
52.
l~~a,“‘i
-7.0,
dBm
,
ATTiN
‘0
,dS
,
0.a5
dB
I
I
I
I
I
POS PK
START 60 MHz
STOP 2.50
GHz
RES
BW
3
MHz
VBW 3 MHz
Figure 2-20.
SWP 62.3
rnsec
Frequency Response Measurement (60 MHz to 2.5
GHz)
On the spectrum analyzer, key in TRACE B
LVIEW),
TRACE A
c-1,
MARKER
(NORMAL_)
and use the DATA knob to position
a marker on the highest point on the TRACE B waveform.
Record the amplitude and frequency for this maximum point in
‘Iable
2-14. The maximum absolute amplitude should be less than
-8.80
dBm.
On the spectrum analyzer, use the DATA knob to position
a marker on the lowest point on the TRACE B waveform.
Record the amplitude and frequency for this minimum point in
‘Iable
2-14. The minimum absolute amplitude should be greater
than
-
11.20
dBm.
On the spectrum analyzer, press MARKER [al and use the DATA
knob to position a second marker on the highest point on the
TRACE B waveform. Flatness (total peak-to-peak amplitude
deviation) of the displayed trace should be less than 1.20
dB.
On the spectrum analyzer, key in
(2-221,
[SHIFT)
[PRESEL
PEAK)
(KS=),
ISHIFT)
TRACE A
C-1
(KSb).
Set the spectrum
analyzer controls as follows:
START FREQ
............................................
.2.0
GHz
STOP FREQ
..............................................
.3.9
GHz
RES BW
................................................... .3
MHz
VIDEO BW
................................................
.3
MHz
REFERENCE LEVEL
..................................... -7
dBm
LOG SCALE
.............................................
1 dB/DIV
Consult the power sensor Cal Factor versus Frequency graph or
table and set the power meter CAL FACTOR
%
switch to the 3
GHz
calibration setting.
Performance Tests 2-41
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