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

[John Ackermann N8UR]

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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