GPS antenna cable length?


just a quick hardware question. I would like to extend the USB cable of my GPS antenna which is a bit short to go beyond the edge of my roof. How long is this possible ?


According to Professor GOOGLE: 150 feet

GPS Antenna Cable Configurations/Options. Antenna cabling solutions typically vary depending on how far the antenna is installed from the GPS receiver . 150 feet (45 m) is the unaided cable length limit for many GPS timing receivers . Adding a GPS inline amplifier extends the cable length an additional 150 feet (45 m).


GPS Antennas & Cable — Masterclock, Inc.


I used a 5m extender for this very reason and it works fine.

If you want to go further you can use a USB repeater/extender like this:[USB Extender]

My GPS unit connects using USB 1.1 which is the lowest speed (12Mbps). In the unlikely event that you have one that uses USB 2.0 (480 Mbps) then you might find 5M struggles a bit without a repeater cable.


For the record: 150 feet of USB cabling is almost certain to fail. The maximum supported cable length for USB interfaces (without a repeater) is 16.5 feet, or 5 meters. (Source:

Most 5 meter USB extension cables contain a repeater inside them, but there has to be a limit to how many of these you can string together due to voltage drops, and I don’t know what that limit is.

GOSH! And I thought that the Internet and Google knew EVERYTHING. My Bad. (Smile)


No worries Jerry! I appreciate the effort.

thank you all for answering my question