Making Measurements Using Spectrum Analyzer Mode
Using the Power Measurement Functions to make Transmitter Measurements
Occupied Bandwidth and Transmitter Frequency Error
You often need to confirm a channel’s 99% occupied bandwidth. The OCCUPIED BANDWDTH function does this easily. The user enters the channel spacing and activates the occupied bandwidth function. Markers show the power bandwidth edges, and the spectrum analyzer calculates and displays:
•The total power in dBmV (other units selectable)
•The occupied bandwidth (99% power bandwidth)
•The transmitter frequency error
The transmitter frequency error is the frequency difference between the midpoint of the power bandwidth and the
For special applications you can change the percent power bandwidth from 1% to 99.99% using the OCC BM % POWER key.
Example: Measure the 99% occupied bandwidth.
1.Connect a signal to the spectrum analyzer’s INPUT 75 a2
2.Press CFREQUENCY) and enter the frequency of your input signal to place the signal at the
3.Press [AMPLITUDE] and adjust the reference level to bring the signal near the top of the display.
4.Press
functions. Press Setup and CHANNEL SPACING to enter the value for the channel spacing. The span is automatically set to be three times the channel spacing value. The center frequency step size is automatically set to be equal to the channel spacing. Press Previous Menu to return to the main power menu.
5.Press OCCUPIED BANDWDTH to activate the function.