frequency, bandwidth, and temperature by using the broadband power meter to correct the in-band
power measurement. This correction occurs when an in-band user calibration is performed.
Procedure:
1 Press the UTILS button on the service monitor twice.
NOTICE: Wait for approximately 1 second or more before pressing the UTILS button the
second time.
The Utility Menu screen appears.
2 From the menu, select User Calibration.
The User Calibration screen appears.
3 Click Run User Calibration in the upper right corner of the User Calibration screen.
NOTICE: The default user calibration setting is 1.0 dB. This setting means that a user re-
calibration is not indicated on the HPD service monitor until the in-band power
measurement has a potential of 1.0 dB error in the measurement (same as the basic in-
band power meter accuracy). For HPD, a 0.5 dB value or lower is more appropriate. This
value may require more frequent re-calibrations, but it provides better performance.
A User Calibration message box appears instructing you to remove all connectors from the
ports.
4 Remove all connectors from the ports. Click Continue.
A progress bar appears showing the progress of the calibration process. The calibration
completes in approximately 2 min.
NOTICE: Failure to remove all connectors and cables from the ports causes an
inaccurate user calibration. Any connectors present causes a variation on the impedance
seen by the instrument during calibration.
5.12.3
Measuring HPD Base Radio Tx Power, Frequency Accuracy, and Tx
EVM
Procedure:
1 Perform the High Performance Data (HPD) service monitor setup steps in Setting Up the HPD
Service Monitor for Testing the Base Radio
on page 198.
2 Configure the service monitor T/R port to receive transmissions from the base radio, as follows:
• Click the T/R soft key under RF In on the right side of the screen.
3 Maximize the RF Control Settings window, by clicking the upper left corner of the window.
MN003286A01-E
Chapter
5: GTR 8000 Base Radio Optimization
200
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