Reminds me of the Intel Pentium and Celeron days. On Wed, Dec 4, 2024 at 1:55 PM Ken Hohhof <khoh...@kwom.com> wrote:
> Pay extra for testing, or do your own testing? The difference may not be > manufacturing process but testing. Of if they know they all pass, then > just labeling. > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Adam Moffett > *Sent:* Wednesday, December 4, 2024 12:36 PM > *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> > *Subject:* Re: [AFMUG] Optics light budget > > > > Yeah, I get that the distance marking is not real, and that's why I was > looking at the light budget. Initially, I was looking because I have 20km > transceivers on hand and a path that's something like 27km. I was trying > to determine if it was even worth trying the 20k's. Apparently yes, it is. > > > > > > > > > ------------------------------ > > *From:* AF <af-boun...@af.afmug.com> on behalf of Trey Scarborough < > t...@3dsc.co> > *Sent:* Wednesday, December 4, 2024 12:27 PM > *To:* af@af.afmug.com <af@af.afmug.com> > *Subject:* Re: [AFMUG] Optics light budget > > > > 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 > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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