Freq Resp 50 MHz to 3.6 GHz Performance Test

Frequency response (aka. Flatness) is defined as the amplitude deviation from the reference amplitude at 50 MHz. The complete EMI receiver frequency response is measured with several tests. The model and options of the DUT will determine which tests are run from the list below:

• Frequency Response Above 3.6 GHz (Preamp On)

• Frequency Response Above 3.6 GHz (Preamp Off)

• Frequency Response 50 MHz to 3.6 GHz

• Frequency Response 9 kHz to 50 MHz

• Frequency Response Below 300 kHz

This test measures frequency response for AC Coupled (only applicable to Options 503, 508 and 526) and Preamp On/Off in both RF Preselector On/Off mode. The EMI receiver has a second RF input, so the test will be repeated for RF Input 2. The highest frequency for RF Input 2 is 1 GHz.

The E9304A Option H18 power sensor is used in this test. The Preamplifier requires very low input levels (-35 dBm). The E9304A can measure these low levels.

A “buried power sensor” technique is used to characterize the tracking error of a power splitter in order to avoid the relatively large specified tracking error. This technique reduces the measurement uncertainty to verify the frequency response specification for the 50 MHz to 3.6 GHz range. The buried sensor calibration is valid for four hours.

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Required Test Equipment

Connection Setups

Splitter Characterization

Frequency Response 50 MHz to 3.6 GHz Test Setup (RF 1)

Frequency Response 50 MHz to 3.6 GHz Test Setup (RF 2)