Installation Manual

Tsunami MP.11a Antenna Installation Guide
Procedure:
1. Start with the transmit power and the number of the channel to be used. From the output power tables
(on page 23) find the dBm associated with this output power and channel.
2. Subtract the total loss of all transmission elements between the antenna and the radio on one side of the
link (dB). (See “Minimum Antenna Cable Loss in 5 GHz Bands” on page 24.)
3. Add the dBi of the antenna you will be using. The total is the EIRP (equivalent isotropically radiated
power).
4. Determine your link budget from the Distance and Path Loss table, For example, if the distance between
the two radios is approximately 5 km, the link budget would be 121. (Note that this is the value for 4.8
km, which is closest to the actual value.)
5. Add the gain of the antenna on the second side of the link.
6. Subtract the total loss of all transmission elements between the antenna and the radio on the second
side of the link. The result is the Received Signal Level (RSL).
7. From the Receiver Sensitivity in Table 2 on page 22, find the dBm value for the data rate used for the
link.
8. Add the “Minimum SNR for a Good Link” value of the data rate in use to the Receiver Sensitivity level.
9. Subtract this value from the Received Signal Level; this is the Fade Margin.
Chapter 2. Determining Range and Clearance 21
CPN 65756 Issue Date: 01 August 2003