China Electronics Technology Instruments AV3672 Series, User Manual

Page: 324 / 424

11 Technical Indicators and Measurement Methods
11.2 Measurement Methods
320
3) Press [Power] and enter -25dBm, record the min. value of output power. Input 20dBm and record the max.
output power;
4) Take difference between the max. and the min value as the test result. Change frequency points in sequence and
repeat Step (2) and (3). Record test results;
5) Connect the power probe to Port 2/3/4. Click [Meas] > [S22]/[S33]/[S44]. Measure the output power sweep
ranges of other ports.
11.2.7 Linearity of Port Output Power
11.2.7.1 Items of Test of Port Output Power Linearity
Test the port output power linearity indicators of AV3672 series vector network analyzers.
11.2.7.2 Instrument and Accessories for Test of Port Output Power Linearity
1) Soft test cable Agilent 85131F
11.2.7.3 Steps of Test of Port Output Power Linearity
1) As shown in Fig. 11.5, connect the system and preheat is for 60min at least.
2) Click [Reset] > [Response] > [Meas] > [Measurement...] and [Receiver]. Select [B] and [Port 1] under [Source]
port and click [OK].
Fig. 11.5 Output Power Linearity of Test Port
3) Press [Channel] > [More] > [Hardware setting] > [Graphical configuration]. Select [Low-band high-power mode]
and click [OK].
4) Press [Power] > [-10] > [OK].
5) Press [Analysis] > [Save] > [Normalize].
6) Press [Power] > [-25] and the ENTER key to change the power into -25dBm. After sweep once, press
[Analysis] > [Track statistics] > [Track statistics ON/OFF]. Read the maximum and minimum value. Calculate the
differences of the (absolution maximum and minimum value+10) minus the set power. The larger absolute value of
two results is the power linearity.
7) Successively change the power and record the linearity values of all frequency bands at each power.
11.2.8 System Trace noise Test
11.2.8.1 Items of System Trace noise Test
Test trace noise indicators of the output frequency sweep signal of AV3672 series vector network analyzers.
11.2.8.2 Instrument and Accessories for System Trace noise Test
1) Soft test cable Agilent 85131F
11.2.8.3 Steps of System Trace noise Test
1) As shown in Fig. 11.6, connect the system and preheat is for 60min at least.