[Test-Equipment] Chinese DID Crystal Tester Question

[Ian Wilson]

These come in several different flavo{u}rs. The one I have is set up as a
counter with
prescaler. There is a toggle for the precision. The only problem I have
with the unit
is that you really need to switch the prescaler somewhere between 3 and
10MHz
(I forget exactly where) which makes it somewhat inconvenient. But the price
was unbeatable and you can always reprogram the PIC if you want to change
things.

73, ian K3IMW

On Wed, Apr 26, 2017 at 6:11 PM, Doug Hensley <w5jv at hotmail.com> wrote:

> I put together one of the red pc board kits that you see on the e-place.
> Thing has 5 seven segment LCD digits, a 9V input socket, a small crystal
> socket for the tiny long wire crystals you see around, and a function
> switch which, when pressed, displays "sub", "add", etc.  Haven't figured it
> out.
>
>
> The main issue i have with the unit is it seems to read left to right,
> from mHZ to kHZ and then rounds off or truncates the decimal or last digit
> so that you still don't know exactly what frequency it is and worse, can't
> tell how far off an old crystal is.
>
>
> Has anyone found a function or truth table for these things?
>
>
> Thanks in advance,
>
>
> Doug W5JV
>
>
>
>
>
>
>
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