[time-nuts] FA2

[ew]

Good Morning DidierThank you for your response. The "ONLY" thing we would like to do is record and display the info coming out of the RS post. To day making long term observations ties up a PC or Laptop with fans and a HP53132. Gone for a week the main concern is fan failure. Store the info on the Tablet in a SD chip or in it and when ready download through the USB port that we use for importing data to a memory stick for further processingThis counter is low power, no fan and has resolution that exceeded the ability of our sources. Not bad for a $120 device.We are presently experimenting using a ISC570 multiplier at 100 MHz and get 13 digits see attached  but the data out of the back is only 12 digits reliable. Looking at averaging.13 digits frequency at 10 seconds even exceeds an 8607, only a saphire will do it.In the past we have run a few 570's at 200 MHz will try, that way we will be able to monitor the 5MHz output of a HP5065A with 5 E-14 resolution.To day running aging test we average a 24 hour run against GPS. Example HP5065A against Tbolt. We repeat the test in 20 days or a month..We also use a handy 10 psec. resolution long term monitor using a 2 channel counter modification that Richard MCC did for us 7 years ago. The counter we use with dual mixer.
Bert Kehren


In a message dated 10/1/2019 11:05:03 PM Eastern Standard Time, shalimr9 at gmail.com writes:

Bert,

FA-2 uses serial emulation over USB with an FTDI chip. As far as I know,
this is not supported under iOS. The best way to get serial data into an
iOS device appears to be through a WiFi module. In this case, you would
have to go from USB to WiFi, not very practical.

Android supports serial via USB and through Bluetooth serial profile, so
you have more options.
To connect the FA-2 to an Android tablet, the FTDI chip should make it very
easy.

However, I am not sure what you want to do with the data in an Android
tablet. Do you have software to process it? If so, it seems it would most
likely support serial. Looking through the Play Store, I did not see
anything timing-related but I did not spend much time looking.

What are you interested in displaying?

Didier KO4BB


On Sun, Sep 29, 2019 at 2:12 PM ew via time-nuts <time-nuts at lists.febo.com>
wrote:

> Didier FA2 is USBBert
> In a message dated 9/29/2019 12:02:51 PM Eastern Standard Time,
> shalimr9 at gmail.com writes:
>
> Android tablets support serial com via USB. You need an adapter which
> should be easy to find (google Serial Adapter for Android). Of course you
> will need the right software at the tablet end to do what you need.
> IOs does not support serial com natively (at least did not when I checked a
> year or two ago) so you would need more hardware to get the data into an
> IOs device.
> What do you want to do with the data in a tablet?
> I write Android apps so I may be able to help if you need to capture the
> data in some format.
>
> Didier KO4BB
>
>
> On Sun, Sep 29, 2019, 6:25 AM ew via time-nuts <time-nuts at lists.febo.com>
> wrote:
>
> >
> >
> > We use Serial com to interface with a PC  It would be nice if some one
> > could find a way to transfer the data to a tablet.
> >
> > Thanks  Bert Kehren
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