Hi Nelson,
If the two shim boxes were identical part numbers, you could. The only
difference is the number of driver boards in the box....28 vs 40 channels. I
think there is 1 or 2 additional boards to drive the other 12 shims. You
would only have to remove the additional boards, and change the config parameters.
The Z0/Z1 boards are the same. You just have to be sure of the polarity switch
on the board...it should be in the same position..
Regards,
John E. Hahn
CAZ Enterprises, LLC
6320 Fly Rd. Ste 207
East Syracuse, NY 13057
Ph. 315-727-8192
http://www.Cazent.com
________________________________
> From: main_at_ammrl.groups.io on behalf of Zhao, Chunqing via groups.io
> Sent: Tuesday, October 7, 2025 16:37
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] find z0 problem on INOVA 400
Hi John:
Is it possible I replace the Z0/Z1 board? We have one spare INOVA 500 console.
Do you think if I could use Z0/Z1 board in INOVA 500 for INOVA 400?
INOVA 400 has 28 shims, while INOVA 500 has 40 shims. I assume I could not
use INOVA 500 shim unit to replace INOVA 400 shim unit, right?
Thanks,
Nelson
> > From: main_at_ammrl.groups.io On Behalf Of johnhahn cazent.com via groups.io
> Sent: Tuesday, October 7, 2025 3:43 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] find z0 problem on INOVA 400
Hi Nelson,
Given that the freq. will change,( actually, you are changing magnetic field
strength when moving the Z0, but you see it as a resonance shift), and it
won't lock, the lock loop isn't being closed,ie, the feedback loop isn't
just compensating the natural field drift anymore...it's throwing an offset
in the loop, forcing the resonance away. If you checked the lock phase,
this sounds like the Z0/Z1 board is defective.
Regards,
John E. Hahn
CAZ Enterprises, LLC
6320 Fly Rd. Ste 207
East Syracuse, NY 13057
Ph. 315-727-8192
http://www.Cazent.com
________________________________
> From: main_at_ammrl.groups.io on behalf of Zhao, Chunqing via groups.io
> Sent: Tuesday, October 7, 2025 14:51
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] find z0 problem on INOVA 400
Hi John:
As far as I knew, we didn’t have a power outage over the weekend.
I could lock manually but the lock signal was not stable and kept changing.
Thanks,
Nelson
> From: main_at_ammrl.groups.io On Behalf Of johnhahn cazent.com via groups.io
> Sent: Monday, October 6, 2025 5:46 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] find z0 problem on INOVA 400
Hi All,
I would first ask whether you experienced a power outage? If so, or in any
event, open the lock screen gui and check to be sure the lock phase is adjusted
correctly. ..if the phase is off, it may not reliably find the Z0. Can you lock
it manually in the gui, or when you get the lock on resonance, and check the
lock box, it shifts out, you most likely have issues to be determined, given
no other circumstances.
Regards,
John E. Hahn
CAZ Enterprises, LLC
6320 Fly Rd. Ste 207
East Syracuse, NY 13057
Ph. 315-727-8192
http://www.Cazent.com
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Received on Wed Oct 08 2025 - 04:30:34 MST