Ping Kari Laine

[John Fields]

I made an error on the LC setup; it should look like this:

+--------------+
| |
| [L]
| | +-------+
[FUNCTION GEN] +<----[X10 PROBE]---|VERT |
| | | |
| [C] | |
| | | |
+--------------+-------------------|GND |
+-------+


And, instead of looking for a null, you tune the generator for a peak on
the scope.

The reason is that the junction of the LC is magic, and were it not for
parasitic losses in the circuit you'd generate a singularity as you
tuned through resonance.


The posted RC needs a little more fleshing out in terms of theory, and
the RL is on the bench.

Maybe tomorrow...

JF

 

[Kari Laine]

John Fields wrote:

I made an error on the LC setup; it should look like this:

+--------------+
| |
| [L]
| | +-------+
[FUNCTION GEN] +<----[X10 PROBE]---|VERT |
| | | |
| [C] | |
| | | |
+--------------+-------------------|GND |
+-------+


And, instead of looking for a null, you tune the generator for a peak on
the scope.

The reason is that the junction of the LC is magic, and were it not for
parasitic losses in the circuit you'd generate a singularity as you
tuned through resonance.


The posted RC needs a little more fleshing out in terms of theory, and
the RL is on the bench.

Maybe tomorrow...

JF

Thanks!

I am now back it to this scope project. Right now I try make
calibration. It is not an easy task.

It sad that so much rubbish is posted to this news group....

Best Regards
Kari




--
PIC - ARM - DISPLAYS - RELAYS - MODULES - CONVERTERS - I2C - SPI -
KEYPADS - ACCESSORIES
http://www.byvac.com (I am just a satisfied customer)