Table of Contents
Advertisement
T A K I N G
M E A S U R E M E N T S
To measure a signal that is not the peak, you may simply move the mouse over the
desired signal and left-click to place a marker. The frequency and amplitude are read as
before.
3.1.2
Example: Identify a Signal's Frequency and Amplitude
TRY THIS EXAMPLE: To find a signal within a certain frequency
range (e.g. 200 MHz to 500 MHz) and measure its exact frequency, a
simple procedure would be:
1. Set START FREQ to the lowest possible frequency (e.g. 200 MHz)
2. Set STOP FREQ to the highest possible frequency (e.g. 500 MHz)
3. Set REFERENCE LEVEL to the highest signal level you expect (e.g. 0
dBm)
4. Wait for the sweep to complete.
5. If a signal is identified, click PEAK, MKR CF to move the signal to the
center of the graticule.
6. Under the Span Controls section, click the down arrow to decrease span, until
your span is 50 MHz.
7. Select Settings->Signal Track->ON
8. Under the Span Controls section, click the down arrow until your span is 50
KHz. Your signal should remain centered horizontally in the graticule during
this process.
Notice the change in sweep speed from wider bandwidths (RBW >= 6.5 KHz, VBW
AUTO) to narrower bandwidths (RBW or VBW < 6.5 KHz) This is due to the
software internally changing modes of operation. For wider bandwidths, a firmware-
controlled sweep collects small packets of data quickly from several local oscillator
frequencies. For narrower spans, a software-controlled sweep collects large amounts
of data from a smaller set of local oscillator frequencies.
3.1.3
Using the DELTA Marker
To measure a difference or change in frequency and / or amplitude, use the
DELTA marker.
1. Select a marker, 1 thru 9, from the control panel.
15
Advertisement
Table of Contents
