Table of Contents
Advertisement
Operator's Manual
EMS Wireless
EkoLink Plus Fiber Optic DAS
Note: To transmit the minimum necessary power, the repeater automatic setup will set
the attenuation for maximum. Then, attenuation levels are reduced until the desired
output power is achieved. The uplink (reverse) attenuation is automatically set equal to
the downlink (forward) attenuation to maintain path balance.
The repeater should now be properly configured for operation.
3.2
Manual System Set-up:
There is an extensive list of software commands that may be used with the EkoLink
Plus. These commands will override the automatic system set up feature and will
require the user to manually adjust both the down link and up link attenuation. The
complete list of commands may be found in Section 8.
4.0 System Optimization
Now that the EkoLink Plus is providing the desired output power, the local repeater
system needs to be optimized. The neighbor lists of the donor base station should
be reviewed. The repeater uses highly selective Surface Acoustic Wave (SAW)
filters, which have a group delay of approximately 3 microseconds. Since the
propagation delay of free space is 5.4 microseconds per mile, the delay is
"equivalent" to approximately 1/2 of a mile of free space propagation.
The neighbor lists of the donor base station and the base stations surrounding the
area served by the repeater need to be adjusted. For example, in Figure 10, a
repeater or DAS extends the coverage of BTS1 to a new area. BTS1 is now
neighbors with BTS4 and BTS5, whereas without the repeater, BTS1 is neighbors
with just BTS2 and BTS3. Thus BTS4 and BTS5 must be added to BTS1's neighbor
list, and BTS1 must be added to BTS4's and BTS5's neighbor lists. A drive test of
the coverage area should be performed to verify the final setup.
26
Advertisement
Table of Contents
