Analog Measurements - Screens and Control Fields

Control Fields for Analog Measurements

 

Input Port

 

This field selects the RF IN/OUT or ANT IN port for making RF

 

measurements. The RF IN/OUT port must be used for making TX

 

power measurements.

 

Operating Considerations

 

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, reset using Meas Reset (press

 

and release the Shift key, then the Hold key), and allow the Test Set to

 

cool off for approximately two minutes before making any other

 

measurements on this port.

 

The ANT IN (antenna input) connector provides a highly-sensitive

 

input for very low level signals (such as “off the air” measurements).

 

You cannot measure TX (RF) power on the RF ANALYZER screen using

 

the ANT IN port.

 

Connecting a signal of >60 mW to the ANT IN port can cause

CAUTION

 

instrument damage (although internal protection circuits can typically

 

withstand a short-duration signal of several Watts).

 

If the overpower circuit is triggered (signified by a warning message at

 

the top of the screen), remove the signal from the ANT IN port, and

 

reset using Meas Reset (press and release the Shift key, then the Hold

 

key) or turn the Test Set off and on.

 

Maximum signal levels at the RF IN/OUT, DUPLEX OUT, and ANT IN

 

ports are printed on the connector panel. Exceeding these levels can

 

cause permanent instrument damage.

 

Screens on which this field is displayed

 

SPEC ANL: RF IN/ANT main controls menu

 

RF ANALYZER

 

Internal

 

This field selects the trigger source.

 

Internal uses the signal being displayed for triggering.

 

Ext (TTL) uses the EXT SCOPE TRIGGER INPUT for triggering.

 

This is a TTL level trigger (approximately 2.5 V).

 

Screens on which this field is displayed

 

SCOPE: trigger controls menu

Chapter 6

201

Page 197
Image 197
Agilent Technologies 8935 series e6380a manual Internal