Anybody using a BTS for debugging?

Sébastien Lorquet squalyl at
Thu May 19 17:45:18 UTC 2011

A N connector is designed for 1KW power and is half an inch in diameter :)

It seems difficult to find the exact type of this connector even if it's
present on a high number of phones.
It may be a MC-Card, Hirose MS-147 is also probable:

You might find a short pigtail that converts this connector to SMA, then a
more classical SMA-anything , maybe SMA-N or SMA-BNC followed by BNC-N.


On Thu, May 19, 2011 at 7:27 PM, Gianni Tedesco <gianni at>wrote:

> On Thu, 2011-05-19 at 19:03 +0200, Sylvain Munaut wrote:
> > Hi,
> >
> > > So how does it work "off-air"? I'll need a shielded cable and attach
> > it
> > > on to the antenna pads of the handset?
> >
> > You need to use a RF 50 ohm coax cable. The Racal has a N connector
> > and the phone should have one has well. I don't remember the exact
> > reference of the C123 connector but I know digikey has adapter to SMA
> > for it, so I use a N to SMA then an adaptor that depends on the phone.
> The unit I'm getting should come with a "BNC to N-Type connector" but I
> thought n-type was maybe 2cm diameter? The connector on the phone (C139)
> is tiny, I have just uncovered it...
> If I understand correctly, I need a special connector for the phone and
> then maybe another one? eg. N to SMA depending on what the special
> connector provides...
> Looking on the list archive someone suggested:
> But no reports as to whether it worked or not.
> Probably I should just get a cheap car-antenna for the phone and rip the
> connector out for my own cable...
> Thanks
> Gianni
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