The
Freenet Antennas 5-mode UltraWAP V2 has significantly better Receive performance compared to the earlier Version 1 (V1).
80% Greater Receive Range
The UltraWAP V2 has a new radio chip with the result that the receive performance is significantly better than V1. Freenet Antennas has done accurate measurements and found that a pair of V2 units continue to transfer data with a signal 5 dB lower than a pair of V1 units.
We found the lowest received signals over which we could transfer data were:
What does 5 dB really mean? This means the range over which a pair of V2 UltraWAP units will operate is 78% greater than for V1.
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Pickup Weaker Signals
The plot below shows the dramatic difference between the Version 1 (V1) and the V2 UltraWAP units.
Both tests were done using the same setup - only the UltraWAP was changed between tests. The setup was: a 12 dBi panel antenna (on a stand) pointed out a window, with 3m of low-loss pigtail to the UltraWAP under test. These UltraWAPs were put into Station-Infrastructure ('Client') mode and asked to perform a scan of APs within range.
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Predicted Performance
The plot below shows actual measured throughput and signal levels for a pair of UltraWAP V2 units. The tests were done by Freenet Antennas with high resolution digitally controlled attenuators. As such, the tests simulate a link with no interference from other 2.4 GHz signals. They represent an upper limit of what is achievable in the real-world.
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Power vs TX Power setting
As of V1.25, it is possible to reduce the Transmit (TX) power via the standard WWW user interface. The table below gives measured transmit powers of the various units available from Freenet Antennas.
Base Power
(mW) | TX Power
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|---|
| 100% | 90% | 75% | 50% | 25%
|
|---|
| 60 | 60 | 30 | 19 | 15 | 4
|
|---|
| 90 | 90 | 57 | 18 | 14 | 6
|
|---|
| 130 | 130 | 82 | 41 | 33 | 10
|
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| 200 | 200 | 100 | 63 | 32 | 16
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