User guide

Canopy System User Guide Configuring an AP-SM Link
pmp-0229 (Mar 2013)
405
7. Among the listed APs (each shown with a unique Index number), find the AP whose
Jitter value is lowest and whose Power Level value is highest (or find the ESN of the AP
to which you were instructed to establish a link).
IMPORTANT: The received Power Level is shown in dBm and should be maximized.
Jitter should be minimized. However, better/lower jitter should be favored over
better/higher dBm. For example, if coarse alignment gives an SM a power level of −75
dBm and a jitter measurement of 5, and further refining the alignment drops the power
level to −78 dBm and the jitter to 2 or 3, the latter would be better, with the following
caveats:
◦ When the receiving link is operating at 1X, the Jitter scale is 0 to 15 with desired
jitter between 0 and 4.
◦ When the receiving link is operating at 2X, the Jitter scale is 0 to 15 with desired
jitter between 0 and 9.
An example of the AP Evaluation tab is shown in Figure 140.
Figure 140: Example data from AP Evaluation tab
PMP 400 Series SMs do not have the Jitter parameter.
NOTE:
For historical reasons, RSSI is also shown and is the unitless measure of
power. The best practice is to use Power Level and ignore RSSI, which
implies more accuracy and precision than is inherent in the measurement.
8. Write down the Frequency and Color Code values of the AP in the link.
NOTE: See Figure 140 on Page 405.
9. In the left-side menu of the SM interface, select Configuration.
10. Click the Radio tab.
11. At the Custom Radio Frequency Scan Selection List parameter, uncheck all
frequencies except the one on which the AP in the link is broadcasting.
12. At the Color Code parameter, enter the code number that was shown for that AP in the
AP Evaluation tab.
13. Click the Save Changes button.
14. Click the Reboot button.
15. Fine-adjust the SM mounting, if needed, to improve Jitter (if reported) or Power Level
according to your company standards.
NOTE: For example, while maintaining or improving on the Jitter that you saw in the AP
Evaluation data, and achieving ≥3 dB of Power Level separation from any other AP, fine-
tune the SM mounting position for the highest Power Level achievable.
16. Retighten the hardware that secures the mounting.
17. In the left-side menu, select Tools.