U3022AH10
High Power Measurements
High power isolators should be inserted between the SOURCE OUT and
CPLR IN front panel ports on the Test Set if you are measuring a highly
reflective device.
The isolators placement is important to ensure that the signal is attenuated
into the U3022AH10 SRC OUT isolator connections for Port 1 and Port 2.
The reverse attenuation or isolation factor of the isolator should be 20 dB or
greater.
Calibrating the System and Measuring the DUT
Do
not
press
Preset
unless you have turned Off the booster amplifier(s) or
have saved this state and renamed it to User Preset. Pressing Preset will
return the analyzer to its default power level and default internal attenuator
settings. The increase in power may result in damage to the DUT or analyzer.
In this procedure you will perform a response calibration.
1. Connect a test port cable to the receiver port.
2. Connect a test port cable to the source port.
3. Connect the two test port cables together using an adapter.
4. Press [CAL] > Start CAL > Calibration Wizard > Unguided Calibration Use Mechanical
Standards > Next > THRU Response > Next. Follow analyzers window prompts to finish the
response calibration.
1. Connection the DUT Input to the source test port cable, and the DUT Output to the
receiver test port cable. Turn on the DUT and measure the DUT gain or loss. Set Trace
S43 if Port 4 is the receiver and Port 3 is the source.
An ECal module can be used if the power level is less than +10 dBm, or the
ECal module is characterized with attenuators installed to protect all inputs
of the ECal module.
2. Remove the DUT and perform a 2-Port or N-Port (all ports) calibration, using mechanical the
standards of the ECal.
•
Ratio measurements, such as gain, will be correctly displayed. However, the displayed
absolute power levels on the analyzer will
not
be correct. To correctly interpret power
levels, gain of the booster amplifier and attenuator values must be taken into consideration.
To perform a N-Port calibration the PNA-X must have Option 551.
U3022AH10 User's and Service Guide
67
If no calibration has been performed or if the instrument is in an uncalibrated state, the
following must be taken into consideration when interpreting the measured data:
•
The value of attenuation added to receiver A - D.
•
The R channel reference level supplied from the Test Set.
•
The source power loss due to the installed isolators.
Содержание U3022AH10
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Страница 30: ...System Configurations U3022AH10 Figure 18 Test Set RF Path Diagram 30 U3022AH10 User s and Service Guide...
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