Cat And Na Modes - Keysight N9912A Service Manual

RF Analyzer Theory of Operation
N9912A Operation in Modes
suspended.

CAT and NA Modes

CAT and NA modes have some similar capabilities but are still separate operating modes.
Measurement similarities:
• Return Loss = S11 magnitude
• Insertion Loss = S21 magnitude
Unlike S11 and S21, the values displayed below zero for Return Loss and Insertion Loss are not negative.
Measurements are done at an effective IFBW (IF bandwidth) of 30 kHz except when max for Interference
Rejection measurements when it is at a 300 Hz effective IFBW.
There is no user control of the output power level of the source synthesizer on the A4 RF board.
The only user control of output power level is the high/low setting on the RF Out Atten, 30 dB in or out.
Details About One Port Measurements
Refer to the block diagram below showing the signal paths highlighted in color.
Figure 5-4 Signal Paths for One Port CAT/NA Measurements
The source and receiver step through each frequency point in the sweep.
Service Guide N9912-90003 5-21