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Making Basic Measurements Using Spectrum Analyzer Mode
Measuring Low-Level Signals Using Attenuation, Video Bandwidth, and Video Averaging
6.
Press (AMPLITUDE),
ATTEN
AUTO MAN . Press the step-up key
(m)
once
to select 20
dB
attenuation. Increasing the attenuation moves the noise
floor closer to the signal
A
“#”
mark appears next to the AT annotation at the top of the display,
indicating the attenuation is no longer coupled to other spectrum analyzer
settings.
7. To see the signal more clearly, press 0
Idemv].
Zero attenuation makes
the signal more visible. (As a precaution to protect the spectrum
analyzer’s input mixer, 0
dB
RF attenuation can be selected only with the
number/units keypad.)
14.
50
13
JUL
23,
IQ93
b
MKR
100
15
MHZ
REF
:
PEAK
LOG
10
dB/
WA
SI
SC
FI
COW
-2.20
dBmV
.8
dml”
#AT
0
dB
ATTEN
^
.^
REF
L”L
m
AUTO
Mx
Figure 4-16. Using 0 dB Attenuation
Before connecting other signals to the spectrum analyzer input, increase
the RF attenuation to protect the spectrum analyzer’s input mixer: press
ATTEN
AUTO
MAN so that AUTO is underlined or press (AUTO COUPLE) and
AUTO ALL.
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