Agilent Technologies E4406A manual MHz Amplitude, Purpose, Measurement Method, Test Setup, Chapter

Making Measurements

50 MHz Amplitude

50 MHz Amplitude

Purpose

To check the amplitude of the internal 50 MHz amplitude reference signal.

Measurement Method

The amplitude of an internal 50 MHz reference signal is compared with the amplitude of a stable external 50 MHz signal which has been measured with a power meter and then connected to the front panel RF connector.

Test Setup

The 50 MHz amplitude feature enables you to measure the amplitude of the internal 50 MHz reference signal. The amplitude of an internal 50 MHz reference signal is adjusted as close as possible to −25.00 dBm, based on the relative measurement of the reliable external 50 MHz signal, which is input by the user into the front panel RF connector. Follow these steps to measure the amplitude of the 50 MHz amplitude reference signal (a power meter and a reliable external source will be needed to perform this test):

1.Set the external source to a frequency of 50 MHz at a power level of −25 dBm (± 2 dBm).

2.Connect the external source to the power meter through a cable.

Adjust the power output of the source until the power meter reads −25.00 dBm, or as close to −25.00 dBm, as possible.

3.Disconnect the power sensor and connect the source to the transmitter tester.

4.Press Mode, Service, Measure, 50 MHz Amptd on the transmitter tester. See next page for results.

144 Chapter 4