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Chapter 9
283
ANT IN
The antenna input is used for analyzing low-power RF signals (≤60 mW), and is typically
used for off-the-air measurements. This port can be selected in the RF ANALYZER,
SPEC ANL, CDMA ANALYZER, or CODE DOM screens.
CAUTION Connecting a signal of >60 mW (17.78 dBm) to the ANT IN port can cause 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 to reset it.
Operating Considerations
Input impedance = 50 Ω
TX power cannot be measured using this port; use the RF IN/OUT port. However, low
power levels can be measured using this port with the spectrum analyzer.
Additional sensitivity for this port is available using the Sensitivity field in the RF
ANALYZER and SPEC ANL screens.