Technical data

User’s and Service Guide Supplement 11
E8362B, E8363B and E8384B Option H85 General Overview
Making High Power Measurements With Option H85
Determining Power Levels
Before continuing, save this state and set it up as the User Preset key. The User Preset
Conditions can be found in the PNA Series Network Analyzer’s help menu.
4. Press [Menu/Dialog] then tab to Help. Select Network Analyzer Help. Type in User
Preset, this will describe how to setup a User Preset. The final state should be saved as
the User Preset to avoid an over power condition from the factory preset.
To find the User Preset:
5. Press [Menu/Dialog] then tab to System. Scroll down to User Preset. Click on User
Preset Enable and press Save, then OK. This will save the current state as User Preset.
6. Turn on the analyzer and decrease the power level to –20 dBm by pressing
[Menu/Dialog] then tab to Channel. In the pull down menu select Power. Scroll to Port
Selection enter [–20]. Select Port Power Coupled to ensure that Ports 1 and 2 power
levels are the same. Uncoupled ports should be used when adjusting the S12 power
level or when Port 1 has a very low power level in comparison to Port 2.
7. Turn on the booster amplifier.
NOTE Depending on the power used, additional attenuation may have to be added
between the coupler and the power meter.
8. Using a power meter and sensor measure the output power from the coupled arm and
the open port of the coupler.
9. Verify the gain of the booster amplifier(s). For example; if the analyzer output power
level was set to –20 dBm and the output power measured from the open end of the
coupler was –5 dBm, the gain of the booster amplifier would be +15 dB.
10. Verify that the power measured in the previous steps is within the acceptable limits
(less than –12 dBm for the coupled arm, less than +43 dBm for the open port). The
maximum power level between 40 GHz and 50 GHz is +40 dBm.
11. Estimate the maximum power level that will be needed to force the DUT into
compression. Determine if the maximum output power from the coupled arm of the
coupler will be higher than the acceptable limit. If so, add the appropriate amount of
attenuation that will keep the coupler arm output power below –12 dBm.