GS1578A HD-LINX® II Multi-Rate Dual Slew-Rate

Cable Driver

Data Sheet

33657 - 5

November 2009

11 of 16

Proprietary & Confidential

Consequently, the output capacitance of the device is dependent on the logic state of the

output.

Figure 5-3: Static Protection Diodes

5.3 Output Return Loss Measurement

To perform a practical return loss measurement, it is necessary to force the GS1578A

output to a DC high or low condition. The actual measured return loss will be based on

return loss will not represent the actual operating return loss.

A simple method of calculating the values of actual operating return loss is to interpolate

the two return loss measurements. In this way, the values of return loss are estimated at

The two values of return loss (high and low) will typically differ by several decibels. If

be interpolated as follows:

SDO

SDO

GS1578A