[hpsdr] Penny FPGA Load

[Bob G Mahrenholz]

Joe,
Does changing the buffer size and/or sampling rate change the bandwidth
of the panoramic display, its update rate or what?
Bob

-----Original Message-----
>From: Joe Martin K5SO <k5so at valornet.com>
>Sent: Jul 14, 2011 5:37 PM
>To: hpsdr at lists.openhpsdr.org
>Subject: Re: [hpsdr] Penny FPGA Load
>
>***** High Performance Software Defined Radio Discussion List *****
>
>Bob,
>
>Pete is correct, except that also the slot positioning criteria also  
>holds for programming via Ozy or Magister using the old USB method of  
>updating the FPGAs too, not only with HPSDR Programmer with Metis.
>
>If you load the FPGA via a Blaster cable and the Quartus II Programmer  
>program then you may do that directly to the header connection on the  
>target board without regard to slot or other boards on the bus.
>
>When operating after the firmware is loaded you may put the boards in  
>any order and in any slot on the Atlas bus you desire, as Pete  
>mentioned.
>
>Your audio drop outs are a different problem entirely.  To check that  
>the correct firmware was actually loaded check the firmware version  
>reported by PowerSDR in the Setup > HPSDR menu, but the version has  
>nothing to do with your audio drop out problem.  Sometimes you can  
>cure audio drop out problems by changing the sampling rate and buffer  
>size specified in the Setup > Audio menu, using lower values.   For  
>me, using Metis cured my drop out issues entirely regardless of  
>sampling rate or buffer size.  Sometimes when using Ozy (USB) instead  
>of Metis (Ethernet) here I must adjust the buffer size to something  
>less than 1024 to obtain drop-out-free behavior.
>
>Try adjusting the sampling rate to a lower value and/or the buffer  
>size to a lower value to see if that helps your drop out problem.
>
>73,  Joe K5SO
>
>On Jul 14, 2011, at 4:14 PM, n3evl wrote:
>
>> Bob,
>>
>> Just to be clear, the discussion on board positioning etc is only  
>> applicable to the operation of programming the boards via HPSDR  
>> Programmer; for normal operation the board positions are arbitrary,  
>> at least that's my understanding and experience.
>>
>> Pete, N3EVL
>>
>> On 7/14/2011 5:53 PM, Bob G Mahrenholz wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> Joe,
>>>
>>> I followed the "Windows Quick Startup Guide" and it said to install
>>> Mercury in Slot J5 and Ozy (Magister for me) in Slot J2 - not quite
>>> adjacent.
>>>
>>> PowerSDR runs but I sometimes have trouble with dropouts - the
>>> screen and audio stop for about a second. I wonder if that could
>>> be my problem. I think I will change them as you say and see how
>>> things work.
>>>
>>> Thanks, Bob
>>>
>>>  -----Original Message-----
>>>> From: Joe Martin K5SO<k5so at valornet.com>
>>>> Sent: Jul 14, 2011 2:16 PM
>>>> To: hpsdr at lists.openhpsdr.org
>>>> Subject: Re: [hpsdr] Penny FPGA Load
>>>>
>>>> ***** High Performance Software Defined Radio Discussion List *****
>>>>
>>>>> Phil:
>>>>> What's valid for Magister and Mercury?
>>>>> Thanks,Bob K4QQK
>>>> Bob,
>>>>
>>>> Since Phil is probably in bed at this moment I'll answer your
>>>> question.   The earlier discussion is the same for Magister and
>>>> Mercury as it is for Metis and Mercury.
>>>>
>>>> Specifically, John's little table above also is correct for Magister
>>>> if  you let "M" represent Magister and "T" represent Mercury.
>>>>
>>>> Your Mercury board needs to be adjacent to the PC interface board
>>>> (Magister, in your case) with the Mercury board located between  
>>>> the PC
>>>> interface board and the power connector on the Atlas bus.  As long  
>>>> as
>>>> they are in that sequence you can put the two adjacent boards  
>>>> anywhere
>>>> on the Atlas bus that you like to do the FPGA loading into Mercury.
>>>> The JTAG continuity will be maintained as long as Mercury is  
>>>> adjacent
>>>> to Magister and Mercury is between Magister and the power connector;
>>>> the pair can be in any two slots on the bus as long as those two
>>>> criteria are met.
>>>>
>>>>
>>>> 73,  Joe K5SO
>>>>
>>>>
>>>>
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>>
>
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