[Flexradio] More memory?

[knesbitt]

Mark,
have you tried tieing your ext keyer or paddle directly to the computer 
com port
(assuming your PC has a com port), and keying the radio that way?

73,

Kirb - VE6IV
--
> Message: 6
> Date: Fri, 04 Dec 2009 17:28:52 -0500
> From: "Brett Gazdzinski" <Brett.Gazdzinski at verizon.net>
> Subject: Re: [Flexradio] More memory?
> To: "Mark Whatley" <mark at completemfg.com>,	<flexRadio at flex-radio.biz>
> Message-ID: <DA881E26F7534AA0B81E4D4C60EB8E2E at brettPC>
> Content-Type: text/plain; format=flowed; charset=iso-8859-1;
> 	reply-type=original
>
> Going from my older Sony laptop, 2x1.6 GHz core, 2 gb, vista 32, to the 
> computer Neal sold me, I got a huge jump in psdr performance.
> I had no glitches running psdr on the laptop, but the delay was bad no 
> matter what I did with the buffers and so on.
> The Sony ran about 30% cpu, and I could surf and get mail without problems.
>
> The new computer reduced the delay to almost nothing, no matter what I do 
> with the buffers etc, and it runs under 10% cpu usage.
>
> Max latency is around 20...
>
>
> It comes down to the delay through the computer, not just memory, or cpu, 
> its likely the bus speeds and the firewire performance.
> The laptop had a good firewire (TI chipset) but the bus speeds must have 
> been very low.
>
> Brett
>
>
> ----- Original Message ----- 
> From: "Mark Whatley" <mark at completemfg.com>
> To: <FlexRadio at flex-radio.biz>
> Sent: Thursday, December 03, 2009 5:45 PM
> Subject: [Flexradio] More memory?
>
>
>   
>> I'm still trying to get acceptable CW performance from my 5000A. I've 
>> tried
>> most of the suggestions I've received without much progress. Buffer sizes
>> and sample rates mostly. One I haven't tried yet is to add more memory to
>> the old computer. It works fine on everything else with about a 30% CPU
>> usage. But the delay when using a paddle with the radio is unacceptable. I
>> currently have 512K and running XP Pro on a P4 at 3GHz.
>>
>>
>>
>> Will more memory help my problem?
>>
>>
>>
>> It doesn't look like PSDR pages stuff to the hard drive while operating so
>> would more memory help? To add a gig to this computer will cost about $100
>> and I don't want to spend the cash if it won't help with the CW problem.
>> Everything works super on the digital modes and voice.
>>
>>
>>
>> I also noticed a problem when keying with an external keyer. Sometimes the
>> first part of a character gets garbled. If the first character happens to 
>> be
>> a dit then the whole dit is skipped sometimes. To check another way I
>> recently installed HRD and tried the option that keys the key line via 
>> RTS.
>> If I send a string of "0" (zeros) sometimes it cuts off part of the first
>> dash. It sounds like a bad switch contact closure while listening to the
>> monitor and also in a separate monitor receiver. Keying speed is about 15
>> WPM and the break in delay is set to 600 ms so the relay will not drop out
>> between words. RF goes into a dummy load at about 10 watts. Power level 
>> has
>> no effect on the issue.
>>
>>
>>
>> I'm using the latest releases of everything - no beta code. VAC and 
>> Com0Com.
>> Tried sample rates of 96K and 192K and about all the buffer sizes.
>>
>>
>>
>> Thanks to all who offered suggestions.
>>
>>
>>
>> 73, K5XH
>>