HP 8753E manual Increasing Dynamic Range, To Increase the Test Port Input Power

Increasing Dynamic Range

Dynamic range is the difference between the analyzer’s maximum allowable input level and minimum measurable power. For a measurement to be valid, input signals must be within these boundaries. The dynamic range is affected by these factors:

m test port input power

ntest port noise floor m receiver crosstalk

To Increase the Test Port Input Power

You can increase the analyzer’s source output power so that the test device output power is at

the top of the measurement range of the analyzer test port.

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Press LMenu) @&j$& and enter the new source power level, followed by Ixl).

Caution TEST PORT INPUT DAMAGE LEVEL: + 26 dBm

To Reduce the Receiver Noise Floor

Since the dynamic range is the difference between the analyzer’s input level and its noise floor, using the following techniques to lower the noise floor will increase the analyzer’s dynamic range.

changing System Bandwidth

Each tenfold reduction in IF (receiver) bandwidth lowers the noise floor by 10 dB. For example, changing the IF bandwidth from 3 kHz to 300 Hz, you will lower the noise floor by about

10dl3.

2.Enter the bandwidth value that you want, followed by @).

Changing Measurement Averaging

You can apply weighted averaging of successive measurement traces to remove the effects of random noise.

2.Enter a value followed by (x1)

Refer to the “Application and Operation Concepts” chapter for more information on averaging.

6-66 Optimizing Measurement Results