[time-nuts] Re: What GNSS module to buy for a good time reference?

[Tom Knox]

Hi All;
There is one NEO F10T breakout board I have seen.
https://www.ardusimple.com/product/simplegnss-timing/
[https://www.ardusimple.com/wp-content/uploads/2023/04/NEO-F10T_top.jpg]<https://www.ardusimple.com/product/simplegnss-timing/>
simpleGNSS<https://www.ardusimple.com/product/simplegnss-timing/>
L1/L5/E5a GNSS receiver with submeter location accuracy, nanosecond timing accuracy and RAW data for postprocessing PPK. Based on u-blox NEO-F10T.
www.ardusimple.com
UBLOX has a eval software that is very useful, but has a few bugs.l
Cheers;

Tom Knox
SR Test and Measurement Engineer
Phoenix Research
4870 Meredith Way Apt 102
Boulder, Co 80303
Formerly of:
357 Fox Lane
Superior Co 80027
303-554-0307
actast at hotmail.com

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________________________________
From: John Ackermann N8UR via time-nuts <time-nuts at lists.febo.com>
Sent: Wednesday, June 21, 2023 8:37 AM
To: time-nuts at lists.febo.com <time-nuts at lists.febo.com>
Cc: John Ackermann N8UR <jra at febo.com>
Subject: [time-nuts] Re: What GNSS module to buy for a good time reference?

The F10T looks interesting, but from the datasheet it is missing a few
maybe important features compared to the ZED-F9T:

-- L1/L5 bands only (no L2 option)
-- only one TIMEPULSE output (could be a very big deal)
-- only one EXTINT input (probably not a big deal)
-- I/O appears to be solely via one UART -- no native USB, no I2C/SPI

A lot of the pins used in the NEO-M8/9 modules are listed as "reserved".
  I don't know whether the limitations are the result of cramming a
dual-freq receiver into the NEO form factor, of if they're for product
differentiation.

John
----

On 6/21/23 10:00, Erik Kaashoek via time-nuts wrote:
> Any advice on what GNSS module to buy for a, to be build, time/frequency
> reference?
> What I understood to look for:
> - Saw tooth correction info, e.g. a T module
> - Dual channel reception to eliminate ionospheric delay errors
> - Module on a PCB with USB and antenna connectors for easy integration
> Looking at the data sheets the ZED-F9T and NEO-F10T seem to be good
> options. Bare modules are difficult to buy.
> I can find a complete module with the NEO-F10T for half the price of a
> module with a ZED-F9T
> Any reason not to buy the NEO-F10T?
> Any other suggestions?
> Erik.
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