Anritsu spectrum master ms2711d User Manual page 130

Example 6: Trace Overlay
The MS2711D Spectrum Master can be used to compare frequency spectrums.
Example:
Step 1. Reset the MS2711D to the factory default settings for the current mode by press-
ing the RECALL SETUP key on the data keypad. When the key is pressed, a
Recall Setup selection box appears on the display. Select setup location 0 <De-
fault> to recall the factory preset state for the currently selected mode.
Step 2. Connect a signal source to the Anritsu Spectrum Master and set the signal
source frequency to 900 MHz and the signal level to –20 dBm.
Step 3. Press the AMPLITUDE key and set the attenuation to Dynamic.
Step 4. Set the center frequency at 900 MHz, resolution bandwidth and video bandwidth
to Auto, and the span to 20 MHz.
Step 5. Press the Trace key.
Step 6. Select the A ® B soft key to save the current runtime trace to the Trace B
buffer.
Step 7. Set the input frequency to 901 MHz and the signal level to –20 dB.
Step 8. Press the Trace B soft key to go to the Trace B menu.
Step 9. Select the View B soft key to view the traces simultaneously.
NOTE: Trace A is displayed as a yellow trace, and Trace B is displayed as a
magenta trace. Some adjustment of the display brightness (see page 2-21) may
be required for optimal viewing.
Figure 4-12 shows the resulting display. Note that the title bar shows both traces.
Figure 4-12. Trace Overlay
NOTE: Two traces cannot be overlaid if they have different resolution
bandwidths or different frequency ranges.
Chapter 4 Measurement Fundamentals
4-19