Hi Bert,
Yes, I have a full profile. The voltages appear to be within spec although
the +18V has a serious distortion on the order of 300mV. However, our working
MR400 has the same appearance.
The 10MHz is also fine.
Thanks for asking,
Scott
Scott K. Smith, Director of NMR Spectroscopy
The University of Texas at Austin | Chemistry | 832-294-1928 | utexas.edu
> From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Spin-Doc
> Sent: Monday, April 1, 2024 9:33 AM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] MR400 LO switching
Hi Scott,
Did you try to measure the voltages on the Molex plugs?
Possible to check the 10 MHz RefGen output (scope)?
Cheers
Bert
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Spin-Doc
Magnetic resonance equipment, service, training & more
Dr. rer. nat. Bert Heise
Owner, applications scientist
Kiefernweg 13
58239 Schwerte
Germany
Web: http://www.spin-doc.net
Mail: bert.heise_at_spin-doc.net<mailto:bert.heise_at_spin-doc.net>
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Representing MestreLab, Stelar & Barthel HF
Am 01.04.2024 um 16:07 schrieb Smith, Scott K <scott.smith_at_austin.utexas.edu
Hi Bert,
Between Thursday and Friday the system failed to a much more serious level.
That is, the synth board is now only outputting a <2mV kHz oscillation that
looks more like noise than an RF signal -both channels are exactly the same.
Never-the-less I tried reseating the PS cables…to no effect.
It is now a permanent state!
For now the TTL state for LO switching is moot.
Thanks for responding.
Scott
Scott K. Smith, Director of NMR Spectroscopy
The University of Texas at Austin | Chemistry | 832-294-1928 | utexas.edu<
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Received on Tue Apr 02 2024 - 05:54:28 MST