EH-1200F Installation Manual
Page 32
The ODU has three modes of operation:
Alignment
– Carrier Wave transmission. Used for antenna alignment.
Adaptive
– Operational mode used with adaptive bandwidth, code, and
modulation.
Static
– Operational mode used with a fixed modulation profile.
ODUs are shipped from the factory in Adaptive mode.
2.10.1
Setting the ODU to Alignment Mode
Switch the EtherHaul ODUs to Alignment mode by inserting the DVM probes into the
AUX Interface sockets. The RF LED color indicator turns orange, indicating the ODU is in
Alignment mode.
The ODU remains in Alignment mode even if the DVM probes are ejected, until the ODU
is rebooted.
2.10.2
Performing the Alignment
Note:
These instructions are for aligning a one-foot antenna. For instructions on aligning a
two-foot antenna, refer to
Installing the ODU with a Two Foot Antenna
.
These instructions refer to
Figure 2-1 EtherHaul Mounting Assembly Components
.
To perform an alignment
1.
Verify that the ODU is in Alignment Mode.
Coarse Alignment (Azimuth Only)
2.
Loosen the unit mounting bolts (
) slightly to allow the ODU some freedom of
movement.
3.
Perform a coarse ODU alignment using a line-of-sight visual check with the
remote EtherHaul ODU. Lock the unit mounting bolts (
) using the 13mm open
wrench.
4.
Repeat steps 1 to 3 above on the remote ODU.
Fine Alignment
Note:
When aligning an antenna, the antenna in the remote node must remain completely
stationary. Perform Fine alignment first on the local antenna, and only afterwards on
the remote antenna.
The optimum alignment may require several adjustment iterations between the local
and remote antennas.
5.
Connect the DVM to the ODU by inserting both red and black probes into their
appropriate positions in the AUX port.
