Interesting. And all these years I used a hex inverter chip. But it also works
if I want to use Bruker to gate a non-Bruker amp…..
Best,
Jeff
On Apr 17, 2024, at 12:53 PM, Huadong Zeng via groups.io wrote:
I used Bruker RF amplifiers (specifically BLAH1000 and BLAX1000) on both Agilent
and Bruker consoles before. There is a TTL jumper inside the amplifier to select
TTL low or high. Bruker console uses TTL active low and Agilent is just the opposite.
Best regards
Huadong Zeng, Ph.D.
Preclinical MRI/S
Advanced Magnetic Resonance Imaging and Spectroscopy Facility
National High Magnetic Field Laboratory
McKnight Brain Institute
University of Florida
1149 Newell Dr, LG-126
Gainesville, FL 32611
Office: (352)294-8638
> From: main_at_ammrl.groups.io On Behalf Of Spin-Doc via groups.io
> Sent: Tuesday, April 16, 2024 5:45 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] BLARH100 with Tecmag Redstone
Hi,
from a BLARH100 900 MHz User manual:
• Safety features (OVERDRIVE, PULSE WIDTH, DUTY CYCLE) which will
temporarily disable the amplifier whenever output power is above a specified
limit. Each amplifier has on board information stored in the RS485 Interface
Board regarding amplifier type, max. Duty Cycle, max. Pulse Width etc. These
parameters can be changed by software if necessary using the ‘edacb’ command.
• The amplifiers are controlled by the ACB-X (Amplifier Control Board
Extended) via an RS485 type link (SBSB2 / tty20 Bus). Individual amplifiers
can be ad- dressed. Hardware address codes are set via a HEX. switch located
on the amplifier front panel. Read and write access to the BLAD Control board
is possible via the ACB-X Board.
• Precise software timing control of the amplifier blanking pulses
(BLKTR1..15) via the „edscon“ table.
The blanking pulses (BLKTR 1... 15) are active low TTL level and generated
by the SGU. They are transmitted to the PSD via the backplane and then to the
amplifier via external cabling. They are easily measured at the BNC connections
on the amplifier front panel. Which blanking pulse is required for which
amplifier will depend upon which router output provides the RF amplifier input.
Thus an amplifier channel connected to router output RO1 will be blanked by
BLKTR1. An amplifier channel connected to router output RO3 will be blanked by
BLKTR3 etc. The source of an individual BLKTR signal will be the SGU on which
the corresponding RF signal has been generated. This ensures coherence between
the SGU blanking and the external amplifier blanking. The timing of the
BLKTR[1... 15] pulses can be adjusted with the „edscon“ table.
Best regards
Bert
Am 16.04.2024 um 20:59 schrieb Joseph Sachleben:
Hi All,
I’m trying to control a an old Bruker BLARH100 500-600 MHz Amplifier
with my Tecmag Redstone. I can’t find a manual for it however. I found
the manual that is in the Bash documentation that shows the block diagrams
of the circuits, but I can’t find a users manual that tells me if it is
using positive or negative logic for the blanking. What the difference is between
the high, medium, and low inputs and outputs on the amp? What's the
function of the RS486 port is?
Any help with documentation would be greatly useful.
Thanks,
Joe S
Joseph R. Sachleben, Ph. D.
Technical Director Biomolecular NMR Facility
The Division of Biological Sciences
929 E. 57th St.
Chicago, IL 60637
(773)834-9866
jsachleben_at_uchicago.edu<mailto:jsachleben_at_uchicago.edu>
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Received on Mon Apr 22 2024 - 14:58:23 MST