Saluki S5105 Series, Руководство пользователя

Страница: 132 / 204

Tel: 886.909 602 109 Email: sales@salukitec.com
www.salukitec.com
126
signal frequency one IF higher than the LO. In this case, one of the signal is called the mirror frequency
of the other. Each frequency of the LO has a mirror frequency of corresponding input signal, with the
difference of two IFs between the signal and frequency of the mirror frequency.
Test image, multiple and out-of-band responses on all frequency bands. The signal is applied to the input
port of the spectrum analyzer for reference amplitude measurement. The composite signal generator is
then tuned to a frequency that causes a mirror, multiple or out-of-band response, and the amplitude
displayed on the spectrum analyzer is measured and recorded.
a)
Testing equipment
Composite Signal Generator ..................................................................................................1464B/C
Test Cables and Adapters
b) Testing steps
10MHz IN
Adapter
10 MHz o
Figure 5-38 Block Diagram for Testing Mirror, Multiple, and Out-of-Band Response
1) Connect the test equipment according to Figure 5-38. The microwave analyzer is used to
provide reference frequencies for the composite signal generator.
2) Set the 1464B/C frequency to 2GHz and the power to -10dBm.
3) Set the spectrum analyzer as follows:
Center frequency ...................................................................................................................2GHz
Span......................................................................................................................................10kHz
Reference Level................................................................................................................ -10 dBm
Resolution bandwidth ............................................................................................................ 10Hz
Video bandwidth .................................................................................................................... 10Hz
4) Adjust the output power level of composite signal generator so that the signal peak is close to
the reference level of the spectrum analyzer.
5) Press [Peak] ->
【
Mkr
】
-> [Difference mode] on the spectrum analyzer.
6) Set 1464B/C to each frequency point of mirroring, multiple and out-of-band response
corresponding to 2GHz listed in the test item of
S5105D/E/F Microwave Analyzer Record Form
,
set the reference level of the microwave analyzer to -40dBm, Press [Peak] , and record the
difference marker amplitude value as the response amplitude in the corresponding test item of
the S5105 D/E/F Microwave Analyzer Record Form
7) For the mirror, multiple and out-of-band responses of the residual frequency points listed in the
S5105 D/E/F Microwave Analyzer Record Form , refer to the settings in steps 2 - 6 until the test
of all frequencies is completed.
9 Residual Response
Description: it refers to the discrete response displayed on the display when the spectrum analyzer has
not connected with any input signal.