PTP 800 Series User Guide
Test ing t he ODU and I F cable
phn- 2513_004v000 ( Oct 2012)
5- 63
Cable loss example using a 17 meter cable
This example is for a cable run consisting of the following:
•
0.7m cable from the test equipment to the first LPU.
•
The first LPU.
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17m of cable between the two LPUs (length ‘y’ in
•
The second (mast mounted) LPU.
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0.7m of cable from the LPU to ODU.
When performing steps 4 to 6 above, compare the ‘before’ and ‘after’ plots of cable loss:
•
is a plot of cable loss taken before the ODU was connected. The plot shows
an average cable loss of 1.96 dB. This can be compared with the expected result in
. For a cable length of approximately 19m (17m + 0.7m + 0.7m) with two
LPUs, the table result is 1.9 dB, which is within the expected tolerance of +/- 10%.
•
is a plot of cable loss taken after the ODU was connected.
Figu r e 8 2
Cable loss plot for a 17 m et er cable wit h no ODU
Summary of Contents for PTP 800 Series
Page 1: ...Cambium PTP 800 Series User Guide System Release 800 05 02 ...
Page 40: ...Licensing requirements About This User Guide 10 phn 2513_004v000 Oct 2012 ...
Page 232: ...Limit of liability Chapter 3 Legal information 3 22 phn 2513_004v000 Oct 2012 ...
Page 322: ...Radiation hazard assessm ent Chapter 4 Reference information 4 90 phn 2513_004v000 Oct 2012 ...
Page 428: ...Replacing IRFU components Chapter 5 Installation 5 106 phn 2513_004v000 Oct 2012 ...
Page 630: ...Using recovery mode Chapter 7 Operation 7 78 phn 2513_004v000 Oct 2012 ...