Download SR5500 User Manual - Spirent Knowledge Base

Chapter Two: Operation Reference | 45
To set the Band and Channel:
1. Click the Select Band and Channel Number button.
2. Select the appropriate Band from the list box.
3. Enter the appropriate channel in the Channel Number textbox.
If the values you enter are valid, SR5500 TestKit displays the corresponding Carrier
Frequency in MHz in the read-only Carrier Frequency textbox.
If you want to change the currently selected Technology and/or Unit Under Test, use the
Test Assistant. For details on using the Test Assistant, refer to Section 2.3. on page 32.
To set the Carrier Frequency in MHz directly:
1. Click the Select Carrier Frequency button.
2. Edit the Carrier Frequency in MHz in the textbox.
3. Click OK to save the changes and close the window.
To cancel the changes, click the Cancel button.
2.7.1.5
Input and Output Level Control Overview
Both the SR5500 input ranging circuit and nominal output level can be manually
configured. Set the input ranging circuitry to match the RMS signal power present at the
input port to the SR5500. The output level parameter determines the nominal RMS
output power present at the output port of the SR5500.
NOTE: The output power level specified will only be accurate if the measured input
power matches the set input power settings.
To achieve the ideal performance from the SR5500, you must properly configure the
SR5500 input ranging circuit to the RMS input power. The SR5500 can measure the input
signal and automatically set the input ranging circuit, or you can manually set the input
ranging circuit. There are special concerns with directly setting these levels. Refer to
Section 2.7.1.6. on page 47 for details on setting the Input Power manually. Access the
automated level control functionality through the Autoset feature. Refer to page 45 for
details on the Autoset feature. SR5500 measures and reports the input power level in
SR5500 TestKit. Refer to the Section on Measured Input and Output Power Indicators on
page 51 for details.
NOTE: If the SR5500 is equipped with the SR5500 6 GHz(-EX) RF Converter, all input
and output power references are mapped to the input and output of the SR5500 6
GHz(-EX) RF Converter.