Agilent Technologies E8285A Manual page 34

Introduction
Product Description
RF and Duplex Outputs
NOTE Test Sets with firmware revision A.04.5X and above operate only at RF
frequencies from 800 to 1000 MHz and 1700 to 2000 MHz. A text only error
message "Input value out of range" , will be displayed if invalid
frequencies are set.
The RF I/O assembly receives the signal from the Upconverter
assembly and routes it to the selected output connector: RF IN/OUT or
DUPLEX OUT. The signal first goes to a variable attenuator for level
control.
If the DUPLEX OUT connector is selected, the signal then goes directly
to that connector without additional attenuation. If the RF IN/OUT
connector is used as an output, the signal passes through additional
attenuation before reaching the connector. This is why a greater signal
level can be output through the DUPLEX OUT connector than through
the RF IN/OUT connector.
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