Rev. 1.0
Page 41
1. Position the cursor to the Marker
field label.
2. Press the F1 key to activate marker.
3. Press the ENTER key to edit the
Marker Frequency.
4. Use the arrow keys to highlight the 1
MHz digit and then the Data Scroll
knob to adjust the frequency value
until the marker is placed directly on
the minimum point of the first dip.
5. Record the marker frequency as F1.
6. Position the marker to the second
dip and record the frequency as F2.
7. Calculate the difference (F2 – F1)
The velocity factor for RG-58 is 65.9% or 0.659.
492 * 0.659
570.0 - 467.0
3.148ft =
492 * Velocity Factor
Delta Freq. in MHz
Distance feet =
To calculate the cable length, measure
the frequency difference in MHz between
two adjacent nulls. By factoring in the
velocity factor of the cable type, the
length can be calculated with the
following formula.
Summary of Contents for COM-120B
Page 1: ...Rev 1 0 Page 1...
Page 2: ...Rev 1 0 Page 2...
