The 20k 40k 80k definition on these is marketing fluff. you have to look
at the actual specifications and calculate it to your network. There is
a difference in quality though. The shorter distance lower priced ones
you will usually find they will be on the low end of the range. Also the
minimum RX level is like the same as a radio. Yeah you can get a link at
a -14, but that may not be error free. The minimum is the lowest lite
level the sensor can really see. when you get into longer distance
optics things like dispersion come in to play too. If your network is
good Ive seen 40k optics go 70k and 80k go over 100k.
On 12/3/24 3:38 PM, Adam Moffett wrote:
et does say guaranteed minimum link budget of 10dB. Even at minimum
tx power of +1 to Rx sensitivity of -14.4 that's still over 15dB.
The 20km unit supposedly has lower reflectance too. There's some math
here beyond my pay grade, or yeah maybe the specs are just wrong.
I guess I'll ask the source.
-Adam
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