On Sun, 19 Feb 2017 22:09:51 +0000 (UTC), Stijn De Jong
wrote:

On Sun, 19 Feb 2017 13:46:55 -0800, Jeff Liebermann wrote:

I don't want to comment on the T-Mobile signal booster due to lack of
experience with the device and general lack of info on what's inside.
If you can supply an FCC ID number, I might be able to excavate
something useful from the FCC ID data dumpster.

Just returned from a hike in the mountains. It's freezing in the mountains
today. You are sending cold winds from Santa Cruz over the ridges!

T-Mobile calls *everything* a "Personal CellSpot" so, this is a photo of my
signal booster from T-Mobile:
http://i.cubeupload.com/6Jpa5v.jpg

Here's the company that makes it (Nextivity):
http://www.cel-fi.com/duo/
Methinks that's the model. Here's the "data sheet" which amazingly is
devoid of most useful numbers:
http://content.cel-fi.com/content/doc/duo_datasheet.pdf
It does mumble that it uses a 5GHz link between the two boxes.

On the back of the existing devices are these FCC IDs:

1. Window Unit: FCC ID YETD24NU
https://fccid.io/YETD24NU
User manual: https://fccid.io/document.php?id=2270465

That's the unit with the cellular radio end. Transmit power is about
100 mw. Doesn't appear to use wi-fi on the 5GHz band so my guess(tm)
is that it simply remodulates the received 1700/1800 RF carrier onto
5GHz. You probably won't see the 5GHz line with any of the Android
wi-fi tools, such as WiFi Analyzer.

2. Coverage Unit: FCC ID YETD24CU
https://fccid.io/YETD24CU
User manual: https://fccid.io/document.php?id=2270512

I'll look some more after I haul some firewood up the hill, clean off
the roof (in the rain), and deal with friends bugging me about their
weekend projects. Also, I'm still having problems with the new and
improved FCC ID document format, which balkanizes the test results
into as many seperate sections as possible in order to make them
difficult to download and read.

What I'm mostly interested is in figuring out how to tell if they're
working, since I can't seem to get different results with or without them
hooked up (and, of course, with the femtocell connected to my router turned
off).

I'm guessing based on the experimental results (which could be misleading)
that they just pass through the cell tower id.

That would also be my guess(tm). Nothing is demodulated or decoded by
the unit. Simply amplified and retransmitted on 5GHz. More later.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558