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124
Reference level................................................................................................................. -50 dBm
Mkr ............................................................................................................................all marker Off
Resolution bandwidth .........................................................................................................300kHz
Preamplifier................................................................................................................................On
Detection type........................................................................................................................Mean
3) Press
【
Mkr
】
-> [Noise Mkr Off On] -> [Peak] -> [Max] .
4) Read the peak value of the marker as the explicit average noise level of the 2MHz/10MHz to
4.5GHz frequency band in the case that the preamplifier is on, and record it in the
corresponding test item of the S5105D/E/F Microwave Analyzer Record Form. Turn off the
noise marker and the averaging function;
5) Set the starting frequency and stop frequency of the S5105D/E/F microwave analyzer
according to the record form to other frequency bands, and the other items remain unchanged;
6) Repeat Steps 3) to 4) to complete the other bands before carrying out the explicit average noise
level test
;
7) Set the starting frequency of the S5105D/E/F microwave analyzer to 2MHz/10MHz, the
stop frequency to 4.5GHz, the reference level to -50dBm, the preamplifier to be off; and
make the others unchanged.
8) Press
【
Mkr
】
-> [Noise Marker Off On] -> [Peak] -> [Max] .
9) Read the peak value of the marker as the explicit average noise level of the 2MHz/10MHz-
4.5GHz frequency band in the case that the preamplifier is off; record the value in the
corresponding test item of the S5105D/E/F
Microwave Analyzer Record Form
. Turn off the
noise marker and the averaging function.
10) According to the record form, set the starting frequency of the S5105D/E/F microwave
analyzer to the other frequency band, the reference level is -50dBm, the preamplifier state is off,
and the others remain unchanged;
11) Repeat steps 8) through 9) to complete the other bands before displaying the explicit the
average noise level test.
7
Second Harmonic Distortion
Description:
When a signal is input to a nonlinear device (such as a mixer and amplifier, etc.), the
nonlinear device will generate the harmonics of the input signal, and the unwanted second harmonic
component attached to the signal is called for second harmonic distortion.
The composite signal generator provides a signal to the spectrum analyzer to measure the second
harmonic distortion via a low pass filter. The low pass filter removes any harmonic distortion from the
signal source. The composite signal generator is locked to the 10 MHz reference of the spectrum
analyzer.
a)
Testing equipment
Composite Signal Generator ..................................................................................................1464B/C
One 1.0 GHz low-pass filter and one 6.8 GHz low-pass filter
One for each of 2.4mm(f)-3.5mm(f), 2.4mm(f)-3.5mm(m), 3.5mm(f)-3.5mm(f) adapters
One BNC (m-m) cable and one 3.5 mm (m-m) cable
b)
Testing steps
