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Chapter 3 59
Overview of the Test Set’s Built-In Tools
Using RF Tools Program
Discrete Freq Insertion Loss
This test measures the loss of a cable or device at a specified frequency.
This test is the most accurate method for measuring insertion loss. In
the menu for this test, you can enter the discrete frequency and signal
level at which the measurement will be made.
This test requires two 6-dB pads. The pads are put on the ANT IN and
DUPLEX OUT ports on the Test Set to reduce impedance mismatch
error at these ports. A reference level is obtained by connecting a short
calibration cable between the pads on the DUPLEX OUT and ANT IN
ports. Next, the test cable or device is added between the calibration
cable and one of the pads, and a measurement is made of the addition
loss from the reference level. The insertion loss at the specified
frequency is displayed on the screen.
NOTE The insertion loss at the specified frequency is displayed twice. The
second display is enlarged for easier reading.
Swept Insertion Loss
This test measures the loss of a cable or device by sweeping it over the
specified frequency range. In the menu for this test, you can enter the
frequency range over which the cable is to be swept.
This test requires two 6-dB pads. The pads are put on the ANT IN and
DUPLEX OUT ports on the Test Set to reduce impedance mismatch
error at these ports. A reference level is obtained by connecting a short
calibration cable between the pads on the DUPLEX OUT an ANT IN
ports. Next, the test cable or device is added between the calibration
cable and one of the pads, and a measurement is made of the addition
loss from the reference level. The trace of the cable loss over the
frequency range swept is displayed. The average loss is also displayed
on the screen.
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