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Description
This group
http://groups.yahoo.com/group/N2PK-VNA
supports the build and use of the N2PK
Vector Network Analyzer (VNA). A detailed
desciption of this VNA can be found at:
http://n2pk.com
N2PK will try to respond to queries as time
permits, but this group is intended to be an
open forum where all members will hopefully
feel free to participate with questions and
answers.
The N2PK VNA by Christer (SM6PXJ) and
Hans (SM0CFO), shown in the photo here,
is an example of homebrew construction at
its finest.
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ADC overflow
Hi Paul, Hi Ivan, Hi 'Paul', I repeated the calibration process, and found no problem. I can now close the file. Thank you for your help and compliments. I
Posted - Fri Feb 10, 2012 11:26 pm
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suzuki_masaya
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Re: ADC overflow
Congratulation Masaya de Paul, W8AEF ZF2JI/ZF2TA 8Q7AA FO8DX/FO0PLA XZ0A VU7RG/VU3PYM TX5A A52PP ... From: suzuki_masaya Sent: Friday, February 10, 2012 6:46
Posted - Fri Feb 10, 2012 5:41 pm
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Paul
w8aef
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ADC overflow
Hi Paul, Hi Ivan, Way out found!!! (I believe) 1) I removed U210, but current through R280 didn't improve. 2) So I replaced C292, C280, and C281 successively.
Posted - Fri Feb 10, 2012 1:46 pm
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suzuki_masaya
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Re: ADC overflow
Hi Masaya, ... There is nothing that can happen under software control that would cause the detector collector common mode voltage to rise or change in any
Posted - Fri Feb 10, 2012 1:03 pm
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Paul Kiciak
n2pk2001
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ADC overflow
Hi Paul, ... Yes I did quite a few times. When I do the voltage measuring without connection to PC, all voltages measured including negative bias voltage are
Posted - Fri Feb 10, 2012 12:33 pm
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suzuki_masaya
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