Actually, one TICC can do three-cornered hat, assuming you can arrange
one source to be 10 MHz and the other two to be PPS.
There's a "TimeLab" mode that generates timestamps of chA vs. ref, chB
vs. ref, and synthesizes chC as (ChB - Cha +chB_int_second). In other
words, the absolute chC timestamp is bogus, but it's consistent across
the measurement. TimeLab can suck in the three-stream data and generate
the same sort of magic it does with Timepod data. (Subject to the
caveats that three-cornered hats are magical hand-waving, and that you
don't have quite the desired utterly synchronized measurement points as
the TimePod gives.)
On 1/8/19 3:10 PM, Bob kb8tq wrote:
Hi
Next we would need LH support for three TICC’s to do three corner hat …. :)
Maybe a module for each TICC …..
Bob
On Jan 8, 2019, at 2:37 PM, Magnus Danielson <[email protected]> wrote:
Hmm... and idea.
For some GPSDOs you get a PPS and is "raw" from GPS module and not
resynthesized from the steered 10 MHz.
Now, if one uses this PPS it would get quite a bit of noise, but if one was to
measure that noise against the smoothed 10 MHz with a separate TIC/TICC one
should be able to use the PPS as a transfer oscillator with the right rate but
get close to the smoothed 10 MHz as stability.
So, it would be neat to be able to have two TIC/TICCs wired up, one for the
PPS/10 MHz and the other for PPS to DUT and then compensate the later
measurement with the former through subtraction.
Sure, this can be achieved by so many other ways, but it would be fun to see if
it pans out when you have the spare TIC/TICC and is able to pull data from
several in real-time.
Cheers,
Magnus
On 2019-01-08 20:28, Mark Sims wrote:
Lady Heather also supports the TICC. The TICC can be the main input
"receiver" device and/or an auxiliary input device. With two TICCs connected
you can process four channels of data.
Heather lets you configure the main input device TICC parameters and also has the ability
to "tune" the TICC channel offsets, etc.
-------------
The TICC talks to a host computer using ASCII on USB.
John Miles' TimeLab software can read data directly from it, or you can
just save the data as a text file with a terminal program
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