User Manual

User Reference and Installation Manual 3-7
MDS 5800 II
attenuate (reduced the strength of) a passing signal. In short, the fact that you can see a
location does not mean that you can establish a quality radio link to that location.
Microwave Data Systems provides a link planner spreadsheet that calculates the Fresnel
ratio and helps determine link feasibility. Contact your technical support representative
for a copy of the spreadsheet.
 Determine MDS 5800 II ODU Mounting Requirements: MDS 5800 II ODUs can be
mounted on an antenna mast, brick, masonry or wall. Refer to detailed installation
sections.
• Determine MDS 5800 II SDIDU
TM
Installation Location: MDS 5800 II SDIDUs
TM
can be
installed tabletop or cabinet, wall mount, or rack mount. The site must provide DC power
or an optional AC/DC converter may be used. Refer to detailed installation sections.
• Document Potential Sources of Co-location Interference: When MDS 5800 II ODUs are
located on a roof or pole with other transmitters and receivers, an interference analysis
may be required to determine and resolve potential interference issues. The interference
analysis needs to be performed by an RF engineer. The specific information required for
each transmitter and receiver includes the following:
- Transmitting and/or receiving frequency
- Type of antenna
- Distance from MDS 5800 II ODU (horizontal and vertical)
- Polarity (horizontal or vertical)
- Transmit power level
- Antenna direction
• Measure the Link Distance: The two ways to measure link distance are as follows:
- GPS: record the latitude and longitude for the near and far MDS 5800 II ODU sites
and calculate the link distance. Record the mapping datum used by the GPS unit and
ensure the same mapping datum is used for all site evaluations in a given network.
- Range finder: measure the link distance (imperial or metric units may be used).
Once the link distance has been measured, verify that the link distance meets the
availability requirements of the link. Microwave Data Systems has created a spreadsheet
tool that calculates the link availability based on the details of the link. The Microsoft Excel
spreadsheet is available on the software distribution CD and is shown on the following
page. The following parameters should be entered (items in yellow):
• Operating Frequency: Enter 5800 or 5300
• Transmit Antenna Gain: Enter 23 for the internal antenna or enter the gain of the external
antenna if used.
• Transmit Output Power: Selectable between -8 to – +23dB (5.8 GHz) and –18 to +13 (5.3
GHz) in 1 dB steps.