DAVIS Wireless Repeaters for VP2 Manual de usuario descargar pdf (Pagina 17)

Rev A 7/28/06 25 - 17

to take the ground into account, and to a lesser extent, minor obstructions in the transmission

path. Assuming there are no objects in the transmission cone, mounting the long-range

repeater antennas up to the maximum effective height (see table below) above the ground

should improve your reception. Mounting heights above this value have little additional benefit.

However, Davis Instruments cannot guarantee better results than those specified in the distance

tables.

Transmit Antenna to

Receive Antenna

Maximum Effective Antenna

Mounting Height

Dipole to Dipole 8’ (2.4 m)

Dipole to Omni 9’ (2.8 m)

Dipole to Yagi 12’ (3.8 m)

Omni to Omni 11’ (3.4 m)

Omni to Yagi 17’ (5.1 m)

Yagi to Yagi 22’ (6.6 m)

The transmission cone of each transmit/receive antenna pair merge to form a football shaped

zone between them. Thus, objects near either antenna that are below them have little affect,

whereas, objects on the ground halfway between the two antennas can have a significant

impact on the transmission distance. In this case, the antennas should be mounted even

higher: above the height of any objects within the transmission zone. The closer you mount the

antennas, the less effect these objects will have.

REPEATER NETWORK FINALIZATION HINTS

TESTING AND INSTALLATION GUIDELINES

The following instructions will have you install each “link” of the network, one by one, verifying

that each link in the network is working properly, first with the weather station, then with the first

repeater in the chain, and then each repeater in the chain, working your way back to the

receiver location. This will make it easier to check and verify that each repeater in each chain is

working. For networks with multiple chains, test and install each chain one at a time.

It is highly recommended that you familiarize yourself with the diagnostic parameters (Received

Signal Strength Indicator (RSSI), synchronization, background noise, reception %, and signal to

noise ratio (S/N)), where they are found and how to set transmitter IDs. This information can be

found in the console and repeater manuals.

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DAVIS Wireless Repeaters for VP2 Manual de usuario Pagina 17