[Hackrf-dev] Clock sync using UBlox GPS

[Wolfgang Nagele]

It would bring more accurate frequency tuning and stability to hold the
frequency.

Sensitivity won't change.

For wideband signals this matters little but if you try tuning and holding
a 1200 baud satellite downlink (think SatNOGs project), compensating for
instance with a Costas loop is your only other option.

On Saturday, August 15, 2015, <veso266 at gmail.com> wrote:

> what is clock supose to do?
> Why we need external one?
>
> Will hackrf be more sensitive using external clock and external ADC?
>
> Just asking because I dont know for what is clock used to
>
> Thanks for anwsering and best regards
>
> —
> Sent from Mailbox <https://www.dropbox.com/mailbox>
>
>
> On Fri, Aug 14, 2015 at 5:38 PM, Wolfgang Nagele <mail at wnagele.com
> <javascript:_e(%7B%7D,'cvml','mail at wnagele.com');>> wrote:
>
>> You would actually need the 6T version as that has a crystal that can
>> give the 10MHz. I think the 7 series is the better way to go as these
>> also support GLONASS:
>>
>> https://www2.u-blox.com/images/downloads/Product_Docs/NEO-7_DataSheet_(GPS.G7-HW-11004).pdf
>>
>> On Sat, Aug 15, 2015 at 1:01 AM, Wolfgang Nagele <mail at wnagele.com
>> <javascript:_e(%7B%7D,'cvml','mail at wnagele.com');>> wrote:
>> > Hi,
>> >
>> > Haven't yet had a chance to test this out - the cheap UBlox GPS module
>> > (ex.
>> http://www.ebay.com.au/itm/Ublox-NEO6MV2-GPS-Module-Aircraft-Flight-Controller-For-Arduino-1PC-New-/350849933793)
>>
>> > has a timepulse output.
>> >
>> > According to the datasheet
>> > (
>> https://www2.u-blox.com/images/downloads/Product_Docs/NEO-6_DataSheet_(GPS.G6-HW-09005).pdf)
>>
>> > that output can be run up to 10MHz and the M series uses 3.3V input
>> > voltage.
>> >
>> > This should suit the HackRF clock input perfectly. Anybody had a
>> > chance to test this yet - any takers?
>> >
>> > Cheers,
>> > Wolfgang
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>
>
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