So on a 60 khz signal the long strip chart recorder is simply a super long
low pass filter averaging out the doppler somewhat. It really doesn't do
that well. The mark-1 eyeball does a better job. Right?
On Tue, Jul 27, 2010 at 4:53 AM, Geoff vk2...@ozemail.com.au wrote:
On Tue, 27 Jul 2010
Partly.
There are hourly jogs in the WWVB signal and also diurnal shifts of the
order of a cycle at 60 KHz.
The Fluke receivers havs a counter for microseconds, but it's difficult to
intrerpret w/o the stripchart too.
Frankly, 60 KHz is a PITA IMO. Oh for LORAN!
-John
==
So on a
The strip chart recorder is, of course, a hangover of days when data-
logging
could not be done digitally. However I still plot the results out
from a data logger
or time stamped data so I can see what is happening. The scatter of
adjacent readings
shows the noise and measurement uncertainty,
Oh indeed I agree John.
LORAN has spoiled me also at least till nov I hear.
The Canadians are a drop better then us at saving the system.
I am definitely figuring out the old ways and can't say that I like it all
that much.
Always have gps for the moment.
On Fri, Jul 30, 2010 at 10:08 AM, J.
The November deadline on the shared stations that hold positions
in both the US and Canadian Loran chains is to allow operation to
continue in Canada until they close their system... in November.
-Chuck Harris
paul swed wrote:
Oh indeed I agree John.
LORAN has spoiled me also at least till nov
Hi Everyone,
Two more GPS-4 units have surfaced. They are new-old-stock. These units were
all new, never used. They were mounted to a PCB as part of an assembly but
never put into service.
I'm asking $300ea for the last two units, shipped to your door. Anywhere in
the continental US.
Bruce,
To confirm the buffer settling time measurements were made on
two cascaded TS272 2x gain stages on a solderless breadboard
using 10k resistors on first stage and 100k resistors with 2.5v
offset correction on second stage similar to the PICTIC II
buffer arrangement. The input was stepped
Hi
There's a couple ways to do this:
One is to actually measure the 1:1000 or 1:4000 voltage settling involved.
That's tough on most scopes. You can set up to do it if your TEK 7000 plug
in collection is large enough.
The other is to look at the observed time constants and come up with a
number
