Agilent Technologies E8285A manual Rf In/Out, SA Trig Output

Chapter 2, Description of Connectors

Connectors

RF IN/OUT

The RF IN/OUT port allows full-duplex interaction, or the RF IN portion can be used with the DUPLEX OUT port, which provides increased output power.

Operating Considerations

When testing CDMA mobile stations, it is important to enter an RF Level Offset for the selected input and output ports. Refer to “Calibrating the Test Set” chapter in the Agilent Technologies E8285A Application Guide.

•Type-N

•This port must be used when measuring transmitter (RF) power.

•This port can be selected in the CONFIGURE, CDMA REVERSE CHANNEL SPECTRUM, analog TX TEST, DUPLEX TEST, RF ANALYZER, or SPECTRUM ANALYZER screens.

•Signals ≤ 60 mW can be input to the ANT IN connector for all RF measurements except transmitter power.

Over-Power Damage. Refer to the Test Set's front panel for maximum input power level. Exceeding this level can cause permanent instrument damage.

CAUTION:If the RF power at the RF IN/OUT port exceeds allowable limits, a loud warning signal sounds and a message appears at the top of the screen.

If this occurs, disconnect the RF power, press the Meas reset key, and allow the Test Set to cool off for approximately 2 minutes before making any other measurements on this port.

SA TRIG OUTPUT

This connector provides a trigger signal for measuring a mobile station’s time response to open loop power control using an external spectrum analyzer.

Test Sets with firmware revisions A.04.50 and higher include a measurement that automatically triggers a power versus time measurement at the correct time relative to the Test Set’s output level change and displays a graph showing the mobile station’s time response to open loop power control. See "Measuring Time Response of Open Loop Power Control" in chapter 5 in the Application Guide.

Operating Considerations

•BNC

•Trigger occurs 180 microseconds before the RF power changes

•Trigger rise time is negligible (approximately 600 ns).

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