[Linrad] Re: Linrad & MAP65

[Leif Asbrink <sm5bsz.com; leif@xxxxxxxxxxxxxxxx>]

Hello Jan,

> I was able to set up both the Linrad 3.05 and MAP65-IQ r1116 and all work
> fine with default par_ files.
> 
> Then I tried MAP65. I am using external sound device from Presonus Firebox.
> It is connected to PC via FireWire. After some problem, Linrad 3.05 works
> well, there are about 6 D/A sync errors after 5 hours. 
OK. There should never ever be any D/A sync errors, but if they happen
infrequently they can not be the reason for problems.

> I have problem with
> MAP65. Regardless running Linrad and MAP65 on the same PS or on two separate
> PCs. I have problem with No RX data. In about 1-2 seconds red "No Rx data"
> appears, than it is fine; gray "Drop: 0.00%" and again No Rx data. It is not
> regular, sometimes it is almost immetiate, sometimes it is OK for 2-3
> seconds.
That seems to indicate a network problem. Maybe the firewire causes latency
problems for the network. You could ask for higher priority but I do not
really think it would help since the firewire would also get increased priority.

I suggest you set the internal soundcard to sample at 96 kHz (16 bit) and
check whether the network is ok when the firewire is not used. I am not
aware of anyone else who has been using firewire for sound input but
maybe you will get comments from others.

> I am using Lenovo W500, Intel Core2 Duo T9400 @ 2.53 GHz,3 GB RAM, MS
> Windows XP Pro with SP3. Linrad configured for 96kHz/24 sampling show less
> than 10 % CPU. I switch off all firewall, anti-virus and other "security"
> SW.
> 
> Any recommendation? I think that if all works fine for SDR-14 and MAP65-IQ,
> the problem is probably in Linrad settings. Can anyone share with me his
> par_files?
I am afraid the problem is in the operating system. With 10% load for Linrad
there can not be a parameter issue (except for not sending the correct format
by not having the correct version for first backward fft.)

73

Leif

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