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S:\HP892XX\USRGUIDE\manual\rfanscrn.fb
Chapter 17, RF Analyzer Screen
Field Descriptions
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 on this
screen.
Operating Considerations
Maximum signal levels at each port are printed on the front panel.
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 [MEAS RESET], and allow the Test Set to cool
off for approximately 2 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 this screen using the antenna port. However, low-level RF power
at the antenna port can be measured using the Spectrum Analyzer.
1
1. Spectrum Analyzer is optional on some Test Set models.
CAUTION: Connecting a signal of >200 mW to the ANT IN port can cause instrument damage (although
internal protection circuits can typically withstand a short-duration signal of 1 or 2 Watts).
If the over-power circuit is triggered (signified by a warning message at the top
of the screen), remove the signal from the ANT IN port, and press
[MEAS RESET] or turn the Test Set off and on to reset it.
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