User's Manual
2.1.2 Subscriber Transceiver Alignment Methods
There are three recommended methods for aligning the Subscriber Transceiver for
maximum performance:
1. Arcwave Signal Strength Meter
2. Dedicated modem signal meter
3. Spectrum analyzer
4. Channel-selectable cable-TV meter.
They are described below.
All devices are used to measure the downstream signal level received from the base
station. By optimizing the downstream, the upstream is optimized automatically.
Once the particular alignment equipment is chosen, and connected to measure the
downstream signal level (receive), the Subscriber Transceiver is peaked as follows:
1. Using a 7/16” wrench (open end, box or socket), loosen the two elevation
alignment bolts until the Transceiver can be tilted up or down by hand, but will
hold its position.
2. Observe the display of the alignment device being employed and orient the
Transceiver up and down to achieve a maximum peak signal. There may be
other smaller peaks, but the main one should be evident.
3. Tighten the elevation alignment bolts slightly.
4. Using the same wrench loosen the four mounting bolts so the transceiver can
be oriented side to side by hand.
5. Observe the display of the alignment device being employed and orient the
transceiver side to side to achieve a maximum peak signal. There may be
other smaller peaks, but the main one should be evident.
6. Tighten the elevation alignment bolts slightly.
7. Repeat the elevation (up or down) adjustment, and then the azimuth (side by
side) adjustment once again.
8. Tighten the elevation alignment (tilt) bolts, taking care not to over tighten.
9. Tighten the mounting bolts firmly, but do not over tighten as that simply bends
the mounting brackets.
10. Remove the measurement equipment and connect the modem cable.
11. Tape the F-type connector to protect it from weather.
12. Verify the modem’s link to the CMTS is operating properly.
The three pieces of measurement equipment are discussed below.
2.1.3 AR100 Signal Strength Meter
The Arcwave AR100 Signal Strength Meter (SSM), shown in Figure 2-4, is a small
hand held device that is temporarily inserted between the Transceiver end of the
coaxial cable down lead and the Transceiver itself, as in Figure 2-5.
ARCXtend manual, August 2003 2-3