User's Manual

Reference

P6330 3.5 GHz Differential Probe Instruction Manua l

Effect of Extending the Output Cable

As the frequency of a signal increases, current flow concentrates at

the outer edges of the conductor, effectively increasing the

impedance. This effect is known as skin loss. The P6330 probe

contains circuitry to compensate for skin loss.

The compensation provides flat response with the probe cable.

Extending the length of the output cable increases t he amount of skin

loss beyond the range of compensation correction. Minimizing the

length of cable extension reduces the attenuation.

In critical applications which require high amplitude accuracy, you

should first characterize the response of the probe with the extension

using a leveled sinewave generator and power mete r. T hen, you can

factor the characterization results into the measurement.

Using the Probe with Other Instruments

You can use the P6330 di fferential probe wit h other types of

measurement instruments, such as spectrum analyzers, time internal

analyzers, and network analyzers.

When using the differential probes with these instruments, you must

use the 1103 TEKPROBE power supply, and normal ize the probe

with the instrument before making a measurement.