User's Manual Part 3
Release8InstallationandConfigurationGuide
Issue2,November2007 Draft5forRegula toryReview 361
15. Connect a ground wire to the 300SS.
16. Replace the cover of the 300SS surge suppressor.
17. For coarse alignment of the BHS, use the Audible Alignment Tone feature as
follows:
a. If the Configuration web page of the BHS contains a 2X Rate parameter, set
it to Disable.
b. At the BHS, connect the RJ-11 6-pin connector of the Alignment Tool
Headset (shown in Figure 130 on Page 352) to the RJ-11 utility port of the
SM.
Alternatively, instead of using the Alignment Tool Headset, use an earpiece
or small battery-powered speaker connected to Pin 5 (alignment tone output)
and Pin 6 (ground) of an RJ-11 connector.
c. Listen to the alignment tone for
◦ pitch, which indicates greater signal power (RSSI/dBm) by higher
pitch.
◦ volume, which indicates better signal quality (lower jitter) by higher
volume.
d. Adjust the module slightly until you hear the highest pitch and highest
volume.
e. If the Configuration web page of the BHS contains a 2X Rate parameter, set
it back to Enable.
18. When you have achieved the best signal (highest pitch, loudest volume), lock the
BHS in place with the mounting hardware.
end of procedure
19.12 UPGRADINGABHLINKTOBH20
To replace a pair of 10-Mbps BHs with 20-Mbps BHs, you can minimize downtime by
temporarily using the 10-Mbps capability in the faster modules. However, both
interference and differences in receiver sensitivity can make alignment and link
maintenance more difficult than in the previous 10-Mbps link. The effects of these factors
are greater at greater link distances, particularly at 5 miles or more.
In shorter spans, these factors may not be prohibitive. For these cases, set the first
replacement module to 1X Rate and establish the link to the 10-Mbps BH on the far end.
Similarly, set the second replacement module to 1X Rate and re-establish the link. With
both of the faster modules in place and with an operational link having been achieved,
reset their modulation to 2X Rate (20 Mbps).
19.13 VERIFYINGABHLINK
To verify the backhaul link after the BHS has been installed, perform the following steps.
Procedure 32: Verifying performance for a BH link
1. Using a computer (laptop, desktop, PDA) connected to the BHS, open a browser
and access the BHS using the default IP address of http://169.254.1.1
(or the IP
address configured in the BHS, if one has been configured.)
2. On the General Status tab of the Home page in the BHS (shown in Figure 65 on
Page 211), look for Power Level and Jitter.