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96 Chapter 4
C:\Spk\Ref\RefGuideRevE\Tools.fm
Overview of the Test Set’s Built-In Tools
Using the RF Tools Program
Figure 4-15 Example of an Swept Return Loss results screen
Estimating Antenna Return Loss
If you are measuring the return loss of an antenna connected to the end
of a known good feed line, you can determine the approximate return
loss of the antenna by subtracting twice the line loss. For example, if
you measure a return loss of 24 dB and the line is known to have 2 dB
loss, the estimated return loss of the antenna is 20 dB (since there is a
total of 4 dB of loss from the feed line). For this estimate to be correct,
the coaxial line and connectors must have a much smaller loss than the
total return loss.
Specifications
• Frequency Range: 0.4-1000 MHz, 1.7-2.0 GHz
• Swept Signal Level: -54 dBm to +10 dBm
• Swept Return Loss Accuracy: +/- 2dB +/--10% of reading, for
readings between 0 dB and 30 dB