Quick Links Menu Select Below ---General----------------------- Home Page Search website ---Products---------------------- 300 Mbps Multipoint Radios 300 Mbps Backhaul Radios 108 Mbps Multipoint Radios 108 Mbps Backhaul Radios Product Ordering Guide ---Support----------------------- Support Menu Search Knowledgebase

Step 1: Check the distance (path) between locations to make sure "Fade Margin" is acceptable.  Change the "Path Length" value to start.  Use the "Tab" key to move between fields and update values.  Grey fields are calculated values.  Pressing "enter" will refresh (clear) the page. Note: Internet Explorer recommended for this VB Script application.  Longest active production WirelessGRID link - 62 miles (100km) with 6 foot parabolic dishes
1a. Enter Path Length in miles      miles  =    km	1b. Select Frequency (GHz)   4.9 GHz (Public Safety Band) 4.4-5.0 GHz (Military Nato IV Band) 5.3 GHz (UNII 2 Band) 5.47 GHz (ETSI Band) 5.8 GHz (UNII 3 & ISM Bands) 2.25 GHz OFDM 2.35 GHz OFDM 2.45 GHz OFDM	Free Space Path Loss (dB)
2. Select Radio Output Power (dBm) - Select the transmit power setting for both ends of the link.  "Local regulatory compliance required."	0.1 dBm 3 dBm 6 dBm 9 dBm 12 dBm 16 dBm (4.9 GHz Max) 18 dBm 20 dBm 21 dBm	0.1 dBm 3 dBm 6 dBm 9 dBm 12 dBm 16 dBm (4.9 GHz Max) 18 dBm 20 dBm 21 dBm
3. Select Radio Receiver Sensitivity (dBm) - Add range by selecting a higher sensitivity rate.  Higher negative values go farther, but at a reduced rate.	-71 (34 Mbps, 40 MHz-wide) -75 (28 Mbps, 40 MHz-wide) -78 (22 Mbps, 40 MHz-wide) -80 (18 Mbps, 40 MHz-wide) -81 (13 Mbps, 40 MHz-wide) -82 (9.5 Mbps, 40 MHz-wide) -71 (24 Mbps, 20 MHz-wide) -75 (18 Mbps, 20 MHz-wide) -78 (12 Mbps, 20 MHz-wide) -80 (9 Mbps, 20 MHz-wide) -81 (7 Mbps, 20 MHz-wide) -82 (5 Mbps, 20 MHz-wide) -74 (11 Mbps, 10 MHz-wide) -78 (9.5 Mbps, 10 MHz-wide) -81 (8.5 Mbps, 10 MHz-wide) -83 (6.5 Mbps, 10 MHz-wide) -84 (3.5 Mbps, 10 MHz-wide) -85 (2.5 Mbps, 10 MHz-wide) -77 (8 Mbps, 5 MHz-wide) -81 (7.5 Mbps, 5 MHz-wide) -84 (6.5 Mbps, 5 MHz-wide) -86 (5 Mbps, 5 MHz-wide) -87 (3.2 Mbps, 5 MHz-wide) -88 (2 Mbps, 5 MHz-wide)	-71 (34 Mbps, 40 MHz-wide) -75 (28 Mbps, 40 MHz-wide) -78 (22 Mbps, 40 MHz-wide) -80 (18 Mbps, 40 MHz-wide) -81 (13 Mbps, 40 MHz-wide) -82 (9.5 Mbps, 40 MHz-wide) -71 (24 Mbps, 20 MHz-wide) -75 (18 Mbps, 20 MHz-wide) -78 (12 Mbps, 20 MHz-wide) -80 (9 Mbps, 20 MHz-wide) -81 (7 Mbps, 20 MHz-wide) -82 (5 Mbps, 20 MHz-wide) -74 (11 Mbps, 10 MHz-wide) -78 (9.5 Mbps, 10 MHz-wide) -81 (8.5 Mbps, 10 MHz-wide) -83 (6.5 Mbps, 10 MHz-wide) -84 (3.5 Mbps, 10 MHz-wide) -85 (2.5 Mbps, 10 MHz-wide) -77 (8 Mbps, 5 MHz-wide) -81 (7.5 Mbps, 5 MHz-wide) -84 (6.5 Mbps, 5 MHz-wide) -86 (5 Mbps, 5 MHz-wide) -87 (3.2 Mbps, 5 MHz-wide) -88 (2 Mbps, 5 MHz-wide)
4. Select Antenna Gain (dBi) - Select the apropriate antenna gain (power) from available antenna options.	0 dBi 3 dBi (Omni) 6 dBi (Omni) 9 dBi (Omni) 15 dBi (120 degree sector) 16 dBi (90 degree sector) 17 dBi (60 degree sector) 21 dBi (4.9GHz Panel) 23 dBi (Directional Panel) 28 dBi (Directional Grid) 32 dBi (3ft Parabolic) 34 dBi (4ft Parabolic)	0 dBi 3 dBi (Omni) 6 dBi (Omni) 9 dBi (Omni) 15 dBi (120 degree sector) 16 dBi (90 degree sector) 17 dBi (60 degree sector) 21 dBi (4.9GHz Panel) 23 dBi (Directional Panel) 28 dBi (Directional Grid) 32 dBi (3ft Parabolic) 34 dBi (4ft Parabolic)
Free Space Receive Signal Level (dBm) - Calculation for the techies.
Effective Isotropic Radiated Power (EIRP) Note: EIRP varies by regulatory domain. Check with local regulatory authority for maximum EIRP allowed.
5. Review Fade Margin in dB - This value should not be less than 10 for a quality link. Higher values are better.

You should also check for path clearance of link by clicking here when you are done checking distance above. AIRAYA also recommends that you use a tool such as DUMeter to test your link for actual TCP/IP throughput.  It has a great graphical display, makes testing link speed and viewing results a very simple task, and is very low cost (approx. $20.00).

Step 2 (optional) : When purchasing radios with N-Type Connectors, you'll need to do these additional calculations:
Length of cable between the antenna and radio bridge unit (ft.)
Cable loss (dB/100 ft) - The cable manufacturer will specify loss based on lengths of cable.
Total cable loss based on length of cable and dB loss/100 ft (dB)
Estimated Connector loss (dB) -Add .3 dB for each connector on external cables.
Divider and Combiner Loss (dB)  optional.  For international use only
Diffraction Loss (dB)Optional - Enter additional loss in dB here

© 2001-2012 AIRAYA Corp All Rights Reserved. About AIRAYA | Privacy Policy | Contact Us | New 300 Mbps MIMO Outdoor Wireless Bridge Kits | 108 Mbps Outdoor Wireless Multipoint Bridges | 108 Mbps Outdoor Wireless Backhaul Kits | Wireless Mobile Subscriber Units | Outdoor Wireless Case Studies by AIRAYA