Saluki S3302 series handheld spectrum analyzer has a variety of measurement functions. In this section, we mainly describe how to use the spectrum analyzer to do the signal source measurement.
![](http://dfjx.xhlcustomer.com/wp-content/uploads/2021/03/Fig.1-S3302-handheld-spectrum-analyzer-300x198.jpg)
Fig.1 S3302 handheld spectrum analyzer
1. Independent Source Measurement
Under the independent source measurement mode, it is allowed to realize the signal output at fixed frequency by the following steps:
a) Press [Measure]–[Generator]–[Generator Off On], the point frequency source output will be selected by default after the Generator switch is turned on;
b) Press [Measure]–[Generator]–[Output Power 0dBm], it is allowed to set the power of output signal;
c) Press [Measure]–[Generator]–[CW Freq 1GHz], it is allowed to set the frequency of output signal.
The signal with output frequency of 1GHz and output power of 0dBm is as shown in Fig.2:
![](http://dfjx.xhlcustomer.com/wp-content/uploads/2021/03/Fig.2-Schematic-diagram-of-point-frequency-source-output-signal-300x214.jpg)
Fig.2 Schematic diagram of point frequency source output signal
2. Generator Measurement
Under the tracking mode, it is allowed to measure the magnitude-frequency characteristics of measured piece by using the synchronous frequency scan of signal source and spectral analysis. For details, please refer to the following setting procedures:
a) Press [Freq]–[Start Freq], to set the start frequency as 100MHz;
b) Press [Freq]–[Stop Freq], to set the stop frequency as 4GHz;
c) Press [Measure]–[Generator]–[Generator Off On], to start the source switch;
d) Press [Measure]–[Generator]–[Power -20dBm], to set the power of output signal;
e) Press [Measure]–[Generator]–[Mode CW Track], to change the signal source mode to tracking mode.
The schematic diagram of output signal is as shown in Fig.3:
![](http://dfjx.xhlcustomer.com/wp-content/uploads/2021/03/Fig.3-Schematic-diagram-of-tracking-mode-300x213.jpg)
Fig.3 Schematic diagram of tracking mode
3. Generator Normalized Measurement
The normalized measurement is to subtract the effect of cable loss from the measuring process. It can reflect the magnitude-frequency characteristics of measured piece more accurately. For example, to test the magnitude-frequency characteristics of 2.3GHz – 2.4GHz band-pass filter, it is allowed to conduct the following procedures:
a) Press [Freq]–[Start Freq], to set the start frequency as 2.1GHz;
b) Press [Freq]–[Stop Freq], to set the stop frequency as 2.6GHz;
c) Press [Freq]–[Generator]–[Generator Off On], to start the source switch;
d) Press [Measure]–[Generator]–[Mode CW Track], to change the signal source mode to tracking mode;
e) Connect the cable to signal source RF output end and frequency spectrum input end, and press [Measure]–[Generator]–[Trans Meas]–[Normalize Off On], to start the normalization switch;
f) After the scanning is completed, it is allowed to add the filter of measured piece and directly observe the magnitude-frequency characteristics of measured piece.
The magnitude-frequency characteristics diagram of 2.3GHz – 2.4GHz band-pass filter is as shown in Fig.4:
![](http://dfjx.xhlcustomer.com/wp-content/uploads/2021/03/Fig.4-Magnitude-frequency-characteristics-diagram-of-2.3GHz-2.4GHz-band-pass-filter-300x215.jpg)
Fig.4 Magnitude-frequency characteristics diagram of 2.3GHz-2.4GHz band-pass filter