Agilent Technologies Agilent 4396B - Manual (Page 111)

Gain Compression Measurement
An important measure of active circuits is how well they handle a
signal frequency with a varying input amplitude . By using the power
sweep function in the network analyzer mode , measurements such as
gain compression or automatic gain control slope can be made .
Measurement Setup
Connection
Set up the analyzer as shown in Figure 5-22.
Figure 5-22. Gain Compression Measurement Setup
Analyzer Settings
Press 4 Preset 5 . Then set the analyzer's controls as follows:
Desired Settings K ey Strokes
A ctive Channel
Block
Select channel 1 4 Chan 1 5 (default)
Measurement
block
Select Network Analyzer Press 4 Meas 5
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
ANALYZER TYPE
F FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
NETWORK ANALYZER
Select S 21 (or B/R) measurement Press 4 Meas 5
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
Trans:FWD S21 [B/R]
Select LOG MA G format 4 F ormat 5
FFFFFFFFFFFFFFFFFFF
LOG MAG (default)
IF BW 10 kHz 4 Bw/A vg 5 10 4 k/m 5
Sweep block Select power sweep Press 4 Sweep 5
FFFFFFFFFFFFFFFFFFFFFFFFFF
SWEEP TYPE
F FFFFFFFFFFFFF
POWER
Start power 020 dBm Press 4 Start 5 020 4 21 5
Stop power 0 dBm Press 4 Stop 5 0 4 21 5
Network Measurement Examples 5-25