[Flexradio] Furman ISO-Patch line isolators available

[root [knesbitt]]

Some were asking,
links to the digital images and spec sheet for the IP-8 patch bay/ line 
isolators.
http://i158.photobucket.com/albums/t94/psk31_bucket/Furman_IP8_Spec.jpg
http://i158.photobucket.com/albums/t94/psk31_bucket/Furman-11.jpg
http://i158.photobucket.com/albums/t94/psk31_bucket/Furman-05.jpg
http://i158.photobucket.com/albums/t94/psk31_bucket/Furman-02.jpg
http://i158.photobucket.com/albums/t94/psk31_bucket/Furman-01.jpg

73,
Kirb - VE6IV

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[Flexradio] Furman ISO-Patch line isolators available

[root [knesbitt]]

If anyones interested, I have access to a limited number of NIB (new in 
box) Furman IP-8 ISO-Patch line isolators. These are Pro (studio grade) 
1RU patch panels with 8 fully isolated patch positions. Provide total 
d.c. block between source and load and can accommodate unbalanced or 
balanced input. Also makes a great audio routing and (mini) patch bay.
Specifications are very similar to the Jensen transformer (1:1), 
typically -0.5 dB from 10 hz to 200 khz. Total Harmonic Distortion 
spec'ed at <0.5% 20 hz to 20 khz. The nice thing is you get 8 
transformers as opposed to one for a fraction of the price of a Jensen 
or Ebtech.
I've used both the Furman IP-8 and IP-2B line isolators in the line-up 
feeding the SDR-1000 and other audio equipment, they work superbly.
If your interested in photos and a scan of the spec sheet, please email 
me for more details.

Best 73,

Kirb - VE6IV
knesbittatnucleus.com  <-remove the "at" for @

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[Flexradio] Poor Audio Connections producing DSSB

[root [knesbitt]]

Dave,
you'll have the same trouble using either DeOxit red or Gold on the 
stainless-steel mini-plug [HOSA]. I tried them all. In order to 
eliminate the oxidation that occurs over time between the plug and jack 
you'd be best advised to re-terminate the cables with 3.5mm gold-plated 
plugs. I have done this and its completely eliminated the connector 
interface problem. As well I've found that a very very light coating of 
DeOxit ProGold contact conditioner on these radio jacks removes the the 
previous grudge and keeps them functioning 100% with the  gold connectors.
Best 73,

Kirb - VE6IV

-- 

ZS6AVM Wrote :

Thanks so much for all the responses
I will see if I can find the recommended contact cleaner
"DetoxIT/Progold" locally, or perhaps something similar
I'm of the opinion that the poor contact may be as a result of
oxidization as the SDR and audio cables are not ever moved, and the
cables therefore are not tampered with
Hopefully I'll find the "DetoxIT/Progold" out here, and if so will give
that a try, before resorting to more drastic measured

Best regards

Dave



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Re: [Flexradio] [Fwd: WinKeyUSB settings for SDR-1000]

[root [knesbitt]]

Using a K1EL K40 keyer (keying via com1 directly), or using a straight 
key, I have the unit interfaced as follows:
SETTINGS --> DSP --> KEYER --> Connections Primary=SDR, Secondary=Com1, 
DTR=Keyline, RTS=PTT
Semi-Breakin: Checked
Iambic mode: Disabled
DB9   Keyer
Use DTR (Pin4) - + key v.
   DSR (Pin6) - keyer gnd/common
 * RTS (Pin7)  - to your PTT line on keyer

* PTT control currently not functional with the K1EL keyers

Ken's suggestions will work FB for direct connect of an iambic paddle to 
the com-port.

73!
Kirb - VE6IV
-

Ken N9VV wrote:
> Paddles work great when the SEMI-BREAKIN and IAMBIC boxes are checked 
> in the Console. My dit paddle goes to pin 6, dash paddle goes to pin 8 
> and ground is pin 4 of COM1.
>
> [a note: Bill KD5TFD commented that he was using a USB --> COM1 port 
> adapter. Mike is made by Targus for about $24. It works great. So you 
> *CAN* use a usb to serial adapter if you want to]
>
> Now I just setting up the external keyer and I immediately found out 
> that the COM port on my PC is NOT COMPATIBLE with the regular TTL 
> circuitry in my WinKeyUSB keyer. So I switched to a WinKeyUSB keyer 
> with RELAYS to do the keying (Steve K1EL calls it the "HV" option). So 
> far that is working GREAT with the keyer output straddling my DIT pin 
> 6 and GND pin 4 of my COM port.
>
> The "trick" seems to be setting up the PowerSDR Console with these 
> SETTINGS --> DSP --> KEYER --> SEMI-BREAKIN checked, Connections 
> Primary=COM1, Secondary=none,  Iambic+monitor+HighRes all UNCHECKED, 
> delay=300ms. This seems to work real well.
>
> I would think that a straight key or any switch closure would work the 
> same as above.
> ---
> Here are the internal keyer settings (configured by paddle or 
> WinKey2USB-HV keyer with relays -  Standalone Editor connected via USB 
> cable)
>
> PaddleDog - ON
> Ratio - 54
> Weight - 50
> Comp - 0
> LeadIn - 0
> 1stExt - 5
> Sample - 45
> Tail - 5
> Farns 0
> Keyer Mode - Iambic B
> Paddle Hang 1.0 Word
> Sidetone - off
> Output Config Port1, ST OFF
>
>
> gosh I wish I could format that list using this text editor :-)
> Ken
>


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[Flexradio] 1.9.0 and occasional cw popping in tx

[root [knesbitt]]

Is anyone experiencing occasional snapping or popping on key closure in 
cw? I'm finding that the radio infrequently kicks out a very brief snap 
either at the onset of tx or on first key closure. Almost sounds like a 
static discharge.
Receive is perfect and the various buffer setting combinations have no 
effect. I'm keying the radio via com1 using an external keyer, however 
this seems to occur using the internal keyer as well.
Thought I had it licked the other day by dropping the FA-66 latency 
values to their smallest values however I've noted the condition again 
tonight running svn 821.
Appreciate all comments.

73,

Kirb - VE6IV

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Re: [Flexradio] v1.9.0 Level Calibration

[root [knesbitt]]

Eric,
what happens if you attempt to run the cal routine on a fresh install 
(no .mdb) at 192k? My results were initially all over the place until I 
re-ran the installation routine at 96k then moved to 192k. At 192k was 
able to get consistent readings between pre-amp settings but always 3 dB 
hot.

Kirb,  VE6IV
-

Eric Wachsmann wrote:
> Strangely enough, I cannot duplicate this issue at my location.  I tried
> just now with the D44 at 48 and 96k and then tried it with the FA-66 at
> 192k.  At all preamp settings and DSP buffer sizes, it is consistent.  I'm
> not sure what's going on.
>
>
> Eric Wachsmann
> FlexRadio Systems
>
>   
>> -Original Message-
>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
>> radio.biz] On Behalf Of root [knesbitt]
>> Sent: Saturday, December 23, 2006 3:59 PM
>> To: flexradio@flex-radio.biz
>> Subject: [Flexradio] v1.9.0 Level Calibration
>>
>> Is it me or is the input level calibration out by 3 dB in v1.9.0 (795)?
>> Dumping a -70 dBm into the front end of the SDR (HP 8648C derived)
>> equates to -67.0 dBm repeatedly for Pre-amp Gain settings of
>> "low/Med/High".
>> Using a new .mdb for this load and have run the Cal routine after
>> ensuring the radio is frequency calibrated.
>> Thoughts?
>>
>> 73,
>>
>> Kirb - VE6IV
>>
>> --
>>
>>
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>> 
>
>
>   


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Re: [Flexradio] spam: v1.9.0 Level Calibration

[root [knesbitt]]

Yes, I just went back a few revs and see the same thing. I'm wondering 
if the difference may be using a wide-band noise source vs. a CW tone 
(as in the case of a signal gen.)?

Kirb - VE6IV
-


Bob Tracy wrote:
> Kirb,
>
> I've seen the same thing for the last few releases but only when the DSP
> buffers are set to 4096, at lower settings the calibration is correct.  I
> have discussed this with Eric but he cannot duplicate it with his equipment.
>
> I calibrate using -73 dBm and consistently get -70 dBm on the meter.
>
> I don't know the answer.
>
> Bob K5KDN
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of root [knesbitt]
> Sent: Saturday, December 23, 2006 3:59 PM
> To: flexradio@flex-radio.biz
> Subject: spam: [Flexradio] v1.9.0 Level Calibration
>
>
> Is it me or is the input level calibration out by 3 dB in v1.9.0 (795)?
> Dumping a -70 dBm into the front end of the SDR (HP 8648C derived)
> equates to -67.0 dBm repeatedly for Pre-amp Gain settings of "low/Med/High".
> Using a new .mdb for this load and have run the Cal routine after
> ensuring the radio is frequency calibrated.
> Thoughts?
>
> 73,
>
> Kirb - VE6IV
>
> --
>
>   


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[Flexradio] v1.9.0 Level Calibration

[root [knesbitt]]

Is it me or is the input level calibration out by 3 dB in v1.9.0 (795)? 
Dumping a -70 dBm into the front end of the SDR (HP 8648C derived) 
equates to -67.0 dBm repeatedly for Pre-amp Gain settings of "low/Med/High".
Using a new .mdb for this load and have run the Cal routine after 
ensuring the radio is frequency calibrated.
Thoughts?

73,

Kirb - VE6IV

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[Flexradio] Edirol Driver

[root [knesbitt]]

Sorry, in my initial reply I referred to USB when in fact I meant to say 
firewire (device).
"You should get your active/sync blue LED back and hopefully XP will 
re-register this USB device."

Cheers!

Kirb - VE6IV

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[Flexradio] Edirol Driver

[root [knesbitt]]

Greg,
are you powering the FA-66 from the USB cable? If so I would suggest 
trying the following *after* powering down the PC;
Connect the supplied ext power pack to the Edirol d.c. input
Set the DC selector switch to the "DC In" position
Confirm the FA-66 lights up
Boot PC>XP :-P
Do not start PowerSDR
Confirm front indicator light in blue
Move rear DC selector switch to the "Off Position" - wait 5 seconds
Move the rear DC selector slider back to the "DC In" position (not BUS 
position).
You should get your active/sync blue LED back and hopefully XP will 
re-register this USB device.
PowerSDR should then be happy with any luck.

Kirb - VE6IV
 
-- 

>Thanks to all who responded to my driver inquiry.  As of tonight, I've tried
>3 different cables, running the set up again and trying various ideas sent
>to me.  Thank you again.
>
>Unfortunately, I still have a problem. My PowerSDR software says FA-66
>driver not found, and when I go to reload the driver, the set up program
>says the driver is already installed.  The set up program also cannot remove
>the "installed" driver either.  
>
>Seems like a computer issue, which I just bought a new Gateway 4200 64X2. 
>
>The radio did work (great, may I add) last night for 1 QSO and tuning around
>until I had what I think was a disruption between the FA-66 and the
>computer.
>
>Any further ideas appreciated.
>
>Greg
>K0PJ/9




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[Flexradio] SVN 740 and CW

[root [knesbitt]]

Internal keyer seems to work fine in iambic mode when tested this am 
(svn_741).
Make sure you enable the high resolution P4 clock function on the 
internal keyer settings (Pentium class P4 only). Disabling "High Res. 
clocking" under the DSP/Keyer settings, results in staccato like keying 
elements if you have the high precision clock enabled on your hw (bios). 
This obviously will only occur with the internal keyer. Ext cw keying 
and PTT/Mox control appear unaffected.

73,

Kirb - VE6IV
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[Flexradio] Optimum settings for CW

[root [knesbitt]]

*Jerry,
I would suggest you start at the following values;
PowerSDR audio buffers: 512
PowerSDR DSP buffers: 2048 (if your running at 96 khz sampling rate), or 
1024 if your sampling at 48 khz.
D44 ASIO: 512 buffers or equiv. ( I do not own a Delta-44) You may need 
to tweak or match the audio buffer setting on the PowerSDR settings.
The SDR audio buffer setting at the D44 ASIO buffers or latency setting 
have the greatest impact on system latency. This is where people go 
astray in setting the rig up for cw. While the large buffer sizes may be 
fine out of the box for ssb, they suck for cw operation.
You want to keep both as small as possible (and similar in size) without 
incurring audio drop-outs or switching artifacts. You'll have to play a 
bit but with a PC of your speed you should have little trouble running 
at the smaller buffers.
I run an Edirol at a sampling rate of 192 khz, and there is virtually no 
latency. It effectively halves the theoretical processing delay moving 
from 96 khz to 192 khz sampling, however when I run the "card" at 96 Khz 
I am able to re optimize (shorten) my buffers and drop the DSP taps to 
2048 (which lowers cpu load slightly) resulting in a "near" identical 
(to the ear anyway), cw response characteristic.
I run an external keyer with direct control of PTT (or MOX). It gives me 
more precise and faster T/R switching control. Also I would highly 
recommend you fed your keyer or paddle directly to the com port of your 
PC rather than to the SDR direct [see OP manual]. The radio responds 
faster to the com port than it does to the shared keyer port on the 
radio. Also, as I mentioned the com port provides a PTT line which can 
be exercised by your ext. keyer assuming it supports this feature (K1EL 
as an e.g.)
Hope that addresses some of the Q's below. Be sure to let us know how 
you make out. It is a great cw radio even sans the true full-QSK.

73,

Kirb - VE6IV

--
Jerry Flanders* jeflanders at comcast.net 

/Tue Oct 24 14:57:48 CDT 2006/

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  Open Source Fan)
  

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I see in the Knowledge Base we have recommendations for optimizing 
SDR-1000 performance on several modes, but CW is NOT one of them.

Can anyone recommend an optimum configuration for a newbie setting up 
for CW? I am using a Delta 44 and either a Sempron 3000+ or a 2.9 GHz P4.


Specifically:

I presume there is a tradeoff to be made between minimizing latency 
and optimum RX CW filter shape - what filter settings are good?

I would hope to use PowerSDR's internal CW keyer, but would an 
external keyer improve performance?

Full QSK at at least 20-25WPM would be the goal - unattainable, of 
course, but how close can we get in terms of the minimum T/R turnaround time?

Does soundcard choice (Edirol FA-66 vs Delta44) make a difference 
with CW to improve T/R turnaround time?

Thanks

Jerry W4UK



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Re: [Flexradio] Image Signal Problem

[root [knesbitt]]

Crit,
not quite clear as to whether you performed the TX Image Rejection procedure or 
not. Resetting these values to gain=0 and Phase=0 may not work.
First I'd say after making absolutely sure you have a solid connection on your 
"to line out" cable between the radio and the D44.
perform the Tx Image Null again as per the method outlined in the manual. I do 
this quite successfully with a second receiver in the shack. 
If this removes the adjacent carrier then make sure that the "null" does not 
change or degrade by twisting or wiggling the inter-connect cable.
I've switched to a custom cable set which uses a different [gold] connector 
design on all my 3.5mm plugs to maintain a consistent connection at the back of 
the radio. Seems to have really helped.
73,

Kirb - VE6IV
---

Message: 2
Date: Fri, 13 Oct 2006 21:02:07 -0400
From: <[EMAIL PROTECTED]>
Subject: [Flexradio] (no subject)
To: 
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1

Okay once again I am asking for your help.
I put a call into FlexRadio but have to wait for Eric to return on Monday.
In the meantime, I thought I would utilize the smarts on this reflector.

Setup:
AMD 64x2 w/ 2 gig memory using Windows XP, Delta 44 Snd card,
a USB to SDR cable and keying via the SDR jack.
Software 1.6.3.; 1.6.2 or SVN 701.

Problem: Received an email today from 9 land as well as a postcard from ARRL in 
SC (45 mi away).
Both saying my signal is too wide.  I don't know how long this has been an 
issue, but might explain why some of the answers to my CQ seemed to be off my 
frequency.

Upon listening to another rig, transmitting into dummy, I have two CW signals.  
There are twice my sidetone frequency apart  (sidetone of 750hz = 1.5kc apart).
Vary the sidetone frequency and the distance apart changes.
The lower frequency signal (running CWL) has slight latency.  
The higher tone does not.  Assume I am transmitting DSB.
The KB FAQ says ... check cables, be sure the TX Image Rejection is set to Zero.

What I have tried ... all making no difference
Re-seating the cables.  Swapping the cables.
Changed then returned to zero the gain and phase in TX Image Rejection setup 
page.
Tried using a parallel connection.  Changing audio buffer size.
Changing the Snd card from 96k to 48k.
Popping the top off the rig, removing the stack to inspect the jacks ? look 
okay.
Continuity check on stereo plug read same for the IN and the OUT jacks.

Now, if some of this sounds familiar this was also a problem I had in the past, 
but it was associated with other issues which were resolved the last time 
I shipped the rig back to Flex. 

Incidentally using SVN 701, I get a lot of crackling, popping and spurs that 
are not there w/ the earlier SVNs.  Did a re-calibration, still there.  Anybody 
else notice this.  

I still am having the trouble w/ sudden interruption of operation (3+  times 
during a QSO) when using the parallel cable ... changed cards ? no joy.  It 
happens w/ the USB connection but much less frequently (every couple days).  
Played w/ the affinity settings ? no joy.  Happens mostly but not always while 
in RX not TX so shouldn't be an RF issue.  The Event Viewer in administrative 
tools does not show an error message at that time.  Happens when running Power 
SDR alone or with other programs.  

Love the RX.

Any suggestions

Tnx/Crit/K4BXN



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[Flexradio] Is Anyone Using the SDR1000 as Primary Radio

[root [knesbitt]]

Yes, its the "A" station here at this QTH. In the spirit of 
full-disclosure I must state however that unlike Bob, I have kept a desk 
full of traditional radios simply for the uninitiated to oogle and 
molest upon visiting the station. All pretty much dead weight at this 
point however (with the exception of the TT Omni VI+), and likely will 
be shipped off once I get sick of look'in at them.
Grab hold, and hang on!

73,
Kirb - VE6IV
--


  [Flexradio] Is Anyone Using the SDR1000 as Primary Radio

*Gerald Capodieci* kd6et at sbcglobal.net 

/Thu Sep 21 17:10:31 CDT 2006/

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It has been my only radio for over 2 months. I've connected to an AL-82 and 
have had glowing signal and audio reports from all over the country
on 40 and 75 mtrs. Except for the CPU locking while using Noise Gate, this is 
the best radio station I have ever used or heard of being used. 
My concern is that the Reflector only carries questions as to how to make the 
radio work and none related to improving it's on-the-air performance. 
Hence the question, is anyone else using the SDR as their primary radio? 
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[Flexradio] 683 comment

[root [knesbitt]]

Paul,
I can vouch for the ASUS P5W with the Intel 975X chipset. Not 
particularly cheap but far superior performance to my previous AMD 
athlon board.
I'm running the P5WD2 with a non-dual core cpu (P-4 HT LGA 775, 3.4 Ghz).
It simply purrs along with 683 feeding a Firebox over 1394. CPU load 
averages about 6-9% running PowerSDR in "letter box" mode (@96k). Don't 
skimp on the memory for this board. Look at the v/low latency dual 
channel (DDR2 800) stuff, as its my understanding that memory 
performance is more important than an over abundance in capacity (in 
this specific case).

Good luck!

Kirb - VE6IV


-- 


  [Flexradio] 683 comment

*Paul Shaffer* flex1 at cyberplasm.com 

/Wed Sep 20 23:31:37 CDT 2006/

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My pc doesn't seem to keep up with the new UI features. CPU reading
varies a lot, from 50% to 70% generally. Tuning is not responsive as
before with mouse wheel, there's a lot more going on as the display
changes. Popping (or dropouts) in received audio is very noticable,
audio/dsp buffers at 1024/1024. I don't think there's anything wrong
with the software, and I like the new features, but I think it's time for
a new motherboard and cpu.

Here's what I'm looking at:

ASUS P5W DH DELUXE/WIFI-AP Socket T (LGA 775) Intel 975X ATX Intel Motherboard
Intel Core 2 Duo E6700 Conroe 2.66GHz 4M sharing L2 Cache LGA 775 Processor

Then I need a new case, 500W power supply, new drives, the works. The old 
pc gets shoved down to the next desk and becomes the #2 machine.
A new pc like this will just barely keep me afloat for media center and hdtv
as well.








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[Flexradio] SDR1000 WPI (Water Pipe Interference) Problem

[root [knesbitt]]

Jerry,
I would suggest you call a priest immediately. This has nothing to do
with the electrical length of your pipe..
See: http://www.stmichael.pair.com/ as a starting point

Cheers,

Kirb - VE6IV

-- 


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[Flexradio] SVN download

[root [knesbitt]]

SR= Spur Reduction

Kirb - VE6IV
__


>Bob,
>
>just downloaded the latest SVN release and still playing with it. So far I 
>do like it.
>
>I figured out that the button marked "Drive" is what used to be called 
>"PWR", but what is "SR" in the DSP group?
>
>Thanks,
>73 de Joe - AB1DO

 


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[Flexradio] FS: PreSonus Firebox

[root [knesbitt]]

Just wanted to offer this to the group prior to going "public". I hope
you'll excuse the b/w.
I have a near new PreSonus Firebox which will soon be surplus to my
needs (going to a different firewire sound device) complete with all the
packaged cables, drivers and 3rd party software (Cubase LE). This unit
was purchased from FlexRadio new as part of my recent SDR-1000 radio
acquisition. As such, it is covered under the US warranty terms.
If interested, please contact me off-list for details.
*This unit has not been firmware flashed with the recent beta code.*

73,
Kirb - VE6IV
knesbitt at rac.ca
-- 


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Re: [Flexradio] CW Memory Keyer

[root [knesbitt]]

John,
check out the K1EL line of keyers. http://www.k1el.com/
I have the K12 and now a K40, both of which work great with the SDR1K. Steve 
also unveiled a new product, the *WK2/WKUSB, *which looks very interesting, 
however I have not used it myself so can't comment further on it. 
Which ever you decide on, make sure the unit supports separate PTT control of 
the radio and adjustable keying/timing parameters. 

Regards,

Kirb - VE6IV
---
John Denson, AI6A wrote:
 
>Date: Sat, 10 Jun 2006 14:30:09 -0700
>From: "John Denson" <[EMAIL PROTECTED]>
>Subject: [Flexradio] CW Memory Keyer
>To: "FlexRadio Reflector" 
>Message-ID: <[EMAIL PROTECTED]>
>Content-Type: text/plain; charset="iso-8859-1"
>
>What do you recommend for a CW Memory Keyer for use with FlexRadio?
>
>John Denson, AI6A



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[Flexradio] PreSonus Firebox Owners - Please Read

[root [knesbitt]]

It has come to my attention that PreSonus apparently has a new firmware
release which is reported to addresses the current deficiencies
associated with either the stock firmware (no 96 khz sampling), or the
beta firmware load recently offered (11 khz bleed through problem).
The issue as before seems to be some reluctance in releasing this new
firmware to the end user in a timely fashion.
To that end I would encourage all current (and future users) of the
product to write the company, 
more specifically, these individuals
http://www.presonus.com/contact.html to express your dissatisfaction
with their product. With any luck we will raise enough dust to have
these deficiencies addressed once and for all.
I would also appreciate hearing back from anyone who receives a
response, positive or otherwise, from their inquiry so all may benefit.

Best 73,

Kirb - VE6IV

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Re: [Flexradio] Popping sound during RX/TX transition

[root [knesbitt]]

Tim,
yes! I am seeing the same thing here. I have been fooling around this 
weekend in WPX CW running in 96 khz mode and dealing with the big 
descending noise spike on Tx to Rx (my Firebox is unmodified for 96 k 
op). The transmit pop you've identified is definitely there when running 
96 but not at 48 K. Thankfully I didn't have the amp on today when 
moving up the band for the net.
Right now I'm running at 48 khz - 2.5ms latency - 256 buffers , all 
seems FB.
Would suggest you file a high priority bug.

Kirb Nesbitt - VE6IV

> --
>
> Message: 3
> Date: Sat, 27 May 2006 16:33:45 -0400
> From: "Tim Ellison" <[EMAIL PROTECTED]>
> Subject: [Flexradio] Popping sound during RX/TX transition
> To: 
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="us-ascii"
>
> I have just noticed listening to my transmitted SSB signal that there is
> a loud audible POP when I transition from RX to TX and my RF output
> spikes to 50 watts PEP.  You do not need to modulate the mic to hear the
> pop.  Just key the rig.
>
> I am using the FireBox (set at 4 ms).  The Soundcard buffers are set at
> 512K and the sound card is running at 96 KHz.
>
> If I increase the sound card buffers to 2048 that eliminates the pops,
> but adds latency.
>
> Has anyone else observed this phenomenon? 
>
> -Tim
> ---
> Tim Ellison  
> Integrated Technical Services   
> Apex, NC USA
> 919.674.0044 Ext. 25 / 919.674.0045 (FAX)
> 919.215.6375 - cell
>   


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Re: [Flexradio] Cw Latency Problem Solved?

[root [knesbitt]]

As well, if your running with an amp and have the X2-7 delay set too 
high (long delay), you will in effect, self-flagellate (is that a word?) 
yourself trying to run high-speed cw with fast break-in. Using either 
the internal or external keyer with semi-break-in enabled, the first 
character will be truncated by the amount set in x2-7. This shortening 
of the first transmitted symbol occurs between the time the radio sets 
up in transmit-mode and when rf output appears at the antenna port. The 
more t/r switching occurring, the more noticeable the shortening is at 
the higher keying speeds (>30 wpm).
Now, this is assuming your monitoring via the radio sidetone [MON] and 
have x2-7 set to some snail-like change-over duration (worst 
case/stone/age/amp). Typically here, I have x2-7 set to 5ms and its a 
non-issue running fast break-in.
Alternatively, if you are running an external keyer which generates it 
own side-tone and provides keying compensation, the x2-7 delay becomes 
completely irrelevant to this discussion.
For people forced to run with loong sequencing durations on x2-7, 
perhaps we could add a first symbol compensation feature to the 
new-keyer module, Bob?

Kirb - VE6IV
--

Robert McGwier wrote:
> I completely concur.   The external keyer, with PTT controlled by the 
> keyer and internal delay of dot/dash without delay on sidetone and 
> with PowerSDR semi-breakin turned off,  is optimal for this radio.  
> Thanks to Kirb's input on a bug which was fixed before the last 
> release,  I think we pretty much have this licked.
>
> Bob
>
>
>
> root [knesbitt] wrote:
>> Eric,
>> this is old news when running the Firebox :-)
>> Actually 0-latency operation is not dependent on running at 96 khz. I 
>> am running my system at 48 khz sampling using the stock Firebox 
>> firmware and new keyer code (external keyer not required). With the 
>> PreSonus set to 512 buffers and *2.5ms* latency there is absolutely 
>> *NO* delay! I can go as low as 2.0 ms latency while running the same 
>> buffer settings on this system without incurring ANY receive 
>> artifacts (3.2 Ghz P4-HT). The radio sidetone/monitor is perfectly in 
>> sync with the keyer sidetone and paddle actuation.
>> Saying that however, there are advantages to using an ext keyer to 
>> more precisely control the break-in action of the radio (for fast 
>> break-in operation), and first character attack and delay through the 
>> use of the PTT line.
>>
>> Kirb - VE6IV
>> ---
>>
>>
>>   
>


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[Flexradio] Cw Latency Problem Solved?

[root [knesbitt]]

Eric,
this is old news when running the Firebox :-)
Actually 0-latency operation is not dependent on running at 96 khz. I am 
running my system at 48 khz sampling using the stock Firebox firmware 
and new keyer code (external keyer not required). With the PreSonus set 
to 512 buffers and *2.5ms* latency there is absolutely *NO* delay! I can 
go as low as 2.0 ms latency while running the same buffer settings on 
this system without incurring ANY receive artifacts (3.2 Ghz P4-HT). The 
radio sidetone/monitor is perfectly in sync with the keyer sidetone and 
paddle actuation.
Saying that however, there are advantages to using an ext keyer to more 
precisely control the break-in action of the radio (for fast break-in 
operation), and first character attack and delay through the use of the 
PTT line.

Kirb - VE6IV
---


Eric Wachsmann wrote:
 >

 > Let me give you the skinny right from the horses mouth. Here's what I 
did: I was using a laptop (P4 ~2GHz) with a >FireBox. I set the FireBox 
to 6ms on the FireBox control panel. This could probably go lower on a 
more powerful >machine. I then set the PowerSDR buffers to 512 for the 
Audio and DSP. I set the FireBox and PowerSDR to use >96kHz sampling 
rate. At this speed, our prospective customer was able to send 50WPM 
using the soundcard >monitor (not an external keyer). This is the first 
time that we have tried this experiment at high speed since we >added 
96kHz support. Previous attempts at this speed all led to us directing 
our customers to use external keyers >for high speed CW. The long and 
short of this is that with the right setup (small buffers, low latency, 
fast PC, etc), >high speed semi-break in CW is possible with the 
SDR-1000 TODAY!
 >
 >
 >Eric Wachsmann FlexRadio Systems


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[Flexradio] PreSonus Firebox Mic2 Input

[root [knesbitt]]

What am I missing to activate the second mic input (MIC/Instrument2) on 
the Firebox? I note the Firebox quick start makes reference to the Mic1 
input only (which is working FB). I'd like to have my second audio 
line-up attached to this second input if at all possible.


73!

Kirb - VE6IV

--

[Flexradio] Linux Wishes

[root [knesbitt]]

From the man himself;
http://www.kernel.org/pub/linux/kernel/SillySounds/

Kirb - VE6IV
--

Tom Thompson wrote-


Bob,

Since I hear Linux pronounced L-eye-nux and L-i-nux, I want to get off 
on the right foot :)  How do you pronounce the African word Ubuntu?


Tom Thompson   W0IVJ

Re: [Flexradio] CW Performance Of SDR1K

[root [knesbitt]]

As the saying goes, a .wav file is worth a thousand words, or in this 
case about 360 KB. Building on Bob's comments below I have gone ahead

and recorded a small sound demo of my SDR1K running with the K1EL
K40 keyer interfaced to the COM1 port.
I am running the new keyer code with high resolution mode enabled.
At present, I am letting the radio perform T/R functions 
(semi break-in enabled), however later today I hope to have the dedicated 
PTT line hooked to the keyer for testing. Allowing the keying device to
exercise PTT control gives some added flexibility in terms of T/R switching 
speeds and sequencing etc. but in most cases as you'll hear its probably

not required.
The K40 is running bone stock out of the box at 25 wpm, while the SDR 
T/R delay is set to 300 ms. Personally, I find this a good over-all setting

(for me) at this speed. I also have an added X2 sequencing delay of 10ms
set for the sake of the amp. 
Ok, so wtH am I listening to..?

What your hearing amongst the rather high ambient noise is a realtime
recording of the radio on 20m with both the radio MONitor enabled, along
with the sidetone osc. emanating from the K40 keyer. 
If you listen closely you'll hear the rather tinny sounding K40 sidetone
mixing with the radio sidetone output. The sync is rather good between 
the two.
I've found that the keying latency is so low with this setup that I 
find myself randomly listening to one or the other without issue.
I have not gotten as fancy as Lee as yet, feeding the K40 sidetone 
into the spare input on the firebox, however it would likely be the ultimate
way to run this setup. 
Note the switch-over time both during the test sequence and right at the 
end of the identification. What your listening for is band noise not a 
signal on receive.

http://www.n9vv.com/VE6IV/sdr1k_25wpm_keying.wav

More to follow.
73,

Kirb - VE6IV
---



Bob N4HY wrote -


As a coauthor of the keyer and keying process in the PowerSDR/SDR-1000,  
I support every word Lee has written.  He is not as critical as I am and 
my old friend Kirb Knessbit has been hold my feet to the fire for a year 
to improve the experience.  Let me say that  I have sold every other 
radio I own except for my homebrew QRP rigs  or kits I have built such 
as my Elecraft gear and those FT-817's I use as IF's for VHF+.  My 
FT1000's and all of my Icom's are gone out of the house.  I can't quite 
start down the W2AGN road.  My wife (N2HPE) is not so understanding!


When I sit in front my radio,  I operate CW.  If you will forgive my 
fist in this piece,  because I was like a one armed paper hanger in a 
derriere kicking contest,  you can get a "feel" for the experience by 
going to


http://home.comcast.net/~rwmcgwier/ 

and playing the PowerSDR CW qso video.

I will do this again with better tools and I apologize in advance for 
forcing you to use Windows Multimedia Player.  I want generic tools and 
I have some.  I am deciding the best approach, and to relieve the one 
armed paper hanger situation before I do this again.


Bob
N4HY

[Flexradio] SDR keyer port code location

[root [knesbitt]]

Chris,
see bug# 281 on the tracker. This relates to a similar problem on the COM1 port 
and using the PTT line on the K1EL keyer.

Kirb - VE6IV

-



Eric,



It's a little confusing to me in the schematic. It appears that there is
a Dot signal {Tip}, a Dash signal [Ring] and a PTT signal that is a
diode OR of the two. I think that is what gets feed over the parallel
port to the PC; please correct me if that is wrong. Otherwise, yes, when
I have the K1EL connected, I want to treat Tip as PTT and use Ring to
key the tone.


Chris - AE6VK


-Original Message-
From: Eric Wachsmann - FlexRadio [mailto:eric at flex-radio.com ] 
Sent: Tuesday, April 18, 2006 11:53 AM

To: Christopher T. Day; FlexRadio at flex-radio.biz 

Subject: RE: [Flexradio] SDR keyer port code location

Christopher,

I believe you will only find access to 2 signals from the Key line on
the back of the SDR-1000.  Perhaps this is all that you need (PTT +
Tone).

Bill hit the nail on the head though with his source code
recommendations.  Let us know if you have specific questions.  It sounds
like what you want to do is to unhook the Dot (or Dash) line and make it
a PTT line while the other line sends the tone.


Eric Wachsmann
FlexRadio Systems

[Flexradio] Calibration Routines

[root [knesbitt]]

Just as a follow-up, the reason I am forced to delete/rename the default 
.mdb file included in the build is due to an error (too many channels) 
which blocks attempts at starting the console. If there's a way to 
resolve this error perhaps using the default database will allow the cal 
routines to run.


73,
Kirb - VE6IV

--

[Flexradio] Calibration routines

[root [knesbitt]]

Is it me or are the calibration routines (Freq, level) not working 
correctly under the 161 beta builds (e.g: svn445)?
I am unable to get the radio to calibrate using either a lab grade 
signal source or WWV @ 10.00 Mhz.
Complains with a "signal not 30 dB above the noise floor" error. I am 
not using a carry-over .mdb file on these builds so not sure whats up. 
Suggestions?


Kirb - VE6IV
--

Re: [Flexradio] [SDR-1000] RE: PreSonus Firebox Output Voltage Descrepancies

[root [knesbitt]]

Further clarification: _DO NOT_ use the "as-read" terminated value in
the SDR console/audio/soundcard/output voltage setting. The terminated
reading is only to be used as a reference for those who obtain a
significantly different unterminated voltage level due to loading
variations.

Cheers.

Kirb,  VE6IV
----

root [knesbitt] wrote:
>
> Re-ran the test as per Eric's recommendations below.
> Just for clarification, remove the *_To Line Out_ *cable on rear of SDR.
> Set V RMS to 1.00
> Run Test
> Line Out 3 & 4 terminated across 50 ohm load shows 1.69 vac. Terminating
> this line for the test eliminates the variations due to differing test
> equipment impedances.
> Line Out 3 & 4 unterminated, read with high impedance DMM indicates
> 6.38 vac
> Set value back to default or as -read value (per above) *before
> *reconnecting patch to Line Out jack on SDR
>
> 73,
> Kirb - VE6IV
> >
> > -Original Message-
> > From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, April 05, 2006 3:25 PM
> > To: 'root [knesbitt]'; FlexRadio@flex-radio.biz;
> > [EMAIL PROTECTED]
> > Subject: [SDR-1000] RE: [Flexradio] PreSonus Firebox Output Voltage
> > Descrepancies
> >
> > I went back to the drawing board and tried to measure this myself and
> > had trouble.  Apparently our hard clipper that we added for the FireBox
> > to prevent overdriving the transmitter is the culprit.  Rather than a
> > single tone @ 600Hz at 6.39VAC, you will get something like a square
> > wave (nasty distortion) at 1.97VAC.  To see the true full value, you can
> > use the following procedure VERY CAREFULLY:
> >
> > 1. Disconnect the audio cable so that it is nowhere near the SDR-1000.
> > ;)
> > 2. Plug in a value to the V RMS right by the test button that is below
> > 1.5V.
> > 3. Run the test.
> > 4. MAKE SURE to change the value back to the default setting before
> > plugging the cable back into the radio!!!
> >
> > We will address this in the software in future releases.
> >
> >
> > Eric Wachsmann
> > FlexRadio Systems
> >
> >
> >  
> > 
> >
> >
> >
> >
> >
> >  
>
>
>

Re: [Flexradio] [SDR-1000] RE: PreSonus Firebox Output Voltage Descrepancies

[root [knesbitt]]

Re-ran the test as per Eric's recommendations below.
Just for clarification, remove the *_To Line Out_ *cable on rear of SDR.
Set V RMS to 1.00
Run Test
Line Out 3 & 4 terminated across 50 ohm load shows 1.69 vac. Terminating
this line for the test eliminates the variations due to differing test
equipment impedances.
Line Out 3 & 4 unterminated, read with high impedance DMM indicates 6.38 vac
Set value back to default or as -read value (per above) *before
*reconnecting patch to Line Out jack on SDR

73,
Kirb - VE6IV
>
> -Original Message-
> From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] 
> Sent: Wednesday, April 05, 2006 3:25 PM
> To: 'root [knesbitt]'; FlexRadio@flex-radio.biz;
> [EMAIL PROTECTED]
> Subject: [SDR-1000] RE: [Flexradio] PreSonus Firebox Output Voltage
> Descrepancies
>
> I went back to the drawing board and tried to measure this myself and
> had trouble.  Apparently our hard clipper that we added for the FireBox
> to prevent overdriving the transmitter is the culprit.  Rather than a
> single tone @ 600Hz at 6.39VAC, you will get something like a square
> wave (nasty distortion) at 1.97VAC.  To see the true full value, you can
> use the following procedure VERY CAREFULLY:
>
> 1. Disconnect the audio cable so that it is nowhere near the SDR-1000.
> ;)
> 2. Plug in a value to the V RMS right by the test button that is below
> 1.5V.
> 3. Run the test.
> 4. MAKE SURE to change the value back to the default setting before
> plugging the cable back into the radio!!!
>
> We will address this in the software in future releases.
>
>
> Eric Wachsmann
> FlexRadio Systems
>
>
>   
>  
>
>
>
>
>
>   

[Flexradio] PreSonus Firebox Output Voltage Descrepancies

[root [knesbitt]]

Folks,
who's all measured their audio output voltages on the Firebox using the
sound card output voltage test?
I just had opportunity to run this test and found my Firebox is only
pumping out 2.2 vac rather than the spec'ed 6.39 vac. Been working with
[EMAIL PROTECTED] in an attempt to understand whats going on. Apparently others
have noted this disparity in "card" output. Curious to know what other
Firebox owners are finding. This is a potentially serious matter given
the large disparity between the default value and the recorded level.
I'm hesitant to apply this new value to the console settings for fear
the level reverts to its higher output. To date however I have found
nothing software/mixer-wise which would account for this.

Kirb - VE6IV

-- 

Re: [Flexradio] All Firebox users - Please read

[root [knesbitt]]

In my response to PreSonus I made it clear that the issue was "out
there" on the various internet lists. As any manufacture should be
aware, reported problems real or otherwise have a way of propagating
across lists rather quickly. What in a sense may only affect a small
user base may grow into a major PR issue for the company and cast
negative light on their product if not dealt with promptly. I'm curious
to know what justification was used to fix the Firepod and not the
firebox. Is it simply a case of the Firebox not being on the market as long?
If they opt not to address the issue might I suggest looking back
towards M-Audio and their Firewire 410 unit. Priced a bit lower (here in
Canada) and the spec's look every bit as good. Remains to be seen if
they have such a baseband deficiency however. Hope to have one on trial
here shortly, will advise..

73,

Kirb - VE6IV
(otherwise massively impressed wid da Firebox)

[Flexradio] Firebox/1394a Tweaks

[root [knesbitt]]

Just an FYI for those running the PreSonus Firebox with mother boards
equipped with specific Intel chipsets, PreSonus has recommended the
following driver update to resolve a potential intermittent audio
dropout/glitch condition during playback. I'm not sure if this has any
bearing on us or not, however thought best to pass it along should users
run into problemos.
Please go to http://presonus.com/fireboxfaqs.html and follow the link at
the bottom of the page.
To determine the correct driver(s) for your board's chipset start at:
http://downloadfinder.intel.com/scripts-df-external/Support_Intel.aspx#
The specific software that PreSonus makes reference to is the updated
RAID/AHCI driver,
the latest being (Win XP pro): RAID/AHCI Software - Intel® Matrix
Storage Manager [IATA55.EXE]



Cheers & 73!

Kirb - VE6IV
-- 

[Flexradio] Firebox problems

[root [knesbitt]]

Sorry everyone. Last post was meant for Jim direct. Lesson to the
wise..all email addresses are intentionally busted on the list headers.
Good idea, just don't try and reply to one ..duh!  (it'll turn up on the
LIST).

Kirb - VE6IV
-- 

[Flexradio] Firebox problems

[root [knesbitt]]

Jimmy,
just read your comments re the Firebox on the Flex reflector. You'll
likely see my query on there as well. I was just wondering if your
current settings (sorry the formatting didn't work to well on your
configuration table) for the Firebox is 1.5 ms or 18 ms?
I can't see how this would work for me in CW if you have to run the
Firebox with 18 ms., this in addition to the latency thats inherent in
the rest of the radio/system.
Your comments/clarification would be much appreciated. Also, just
wondering if you've run your SDR1K in CW using this configuration?

Cheers!

Kirb - VE6IV

-- 

[Flexradio] Firebox vs. latency

[root [knesbitt]]

Was wondering if anyones performed comparisons between the Delta-44 and
the Presonus Firebox in regards to latency. I realize that with either
configuration there will be latency through the ASIO drivers, (asio4all
or the M-audio asio), however I'm concerned that some of the values I've
seen mentioned here recently re the Firebox may prove problematic (cw).
I have a SDR1K on order with the Firebox and am just wondering if one
"sound card" solution has proven more effective overall in terms of
system setup for short delays (minus dropouts etc).

73,

Kirb,  VE6IV

-- 

Re: [Flexradio] High-Resolution Clock on AMD64 / nVidia nForce

[root [knesbitt]]

Tim,
I'm running/testing a AMD Athlon64 (3200+). The mobo uses the new nVidia
nForce 430 chipset.
This board replaced an ASUS A7V (XP3100+) running the VIA chipset
similar to yours. Both boards report the 3.58 mhz clock on perf.exe :-(
Can you or possibly others tell me how well your system handles cw
(transmit) at speeds in excess of 30 wpm? Curious to know if setting the
high resolution clock in the set-up panel has any effect one way or the
other.

Cheers-
Kirb,  VE6IV
---   ---   ---   ---

Tim Ellison wrote-

>What processor are you using?  I have a Athlon 2X (dual core) 4400+
>(2.2 GHz) on an Asus A8V Deluxe (VIA chipset) and I get the exact same
>values you report.  If you have a different processor, then there may be
>a bug in the program.
>
>-Tim
>---
>Tim Ellison ( [EMAIL PROTECTED] )
>Integrated Technical Services ( http://www.itsco.com )


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[Flexradio] High-Resolution Clock on AMD64 / nVidia nForce

[root [knesbitt]]

Curious if people have run the Performance Counter Query Tool
http://lightconsulting.com/~thalakan/perf.exe

to determine whether their motherboard and chipset supports the high
resolution clock.
I'm particularly interested in the results obtained from users of AMD
Athlon64 motherboards using the newer nVidia nForce4 or nForce 430 chipset.
My new board seems to be indicating a clock frequency of only 3579545 hz
in spite of nVidia's claim to adhere to the ACPI 2.0 standard. My
understanding, if I read the SDR-1000 manual correctly, is you must see
a clock frequency approaching the clock rate of the CPU, in other words
in the Ghz range to be compliant with ACPI 2.0, and thus capable of
utilizing "high-resolution timing" in the PowerSDR cw setup (a must).
Are all new boards not created equal? Appreciate hearing which boards do
report the higher clock speeds.

Kirb,  VE6IV

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