You would have thought that they would thank you profusely and send you a free card. Very poor response (the company, not the card).
Jan
I have attached a measurement of the distortion using balanced and unbalanced connections.
The performance is different, but not by a huge margin. It is probably caused by the input amplifier. The two phases of the balanced outputs are exactly the same, except that the signals are inverted versions of each other.
The expansion connector is still there. It might be used for added functionality in the future, but I cannot promise that.
Be careful comparing noise floors. They need to be at the same resolution (sample rate X Number of points) to start with. And other aspects of the sampling will impact this result. HpW (http://www.diyaudio.com/forums/vend...-pc-based-measurement-system.html#post4864014) has done a lot on this in his software. This can be confusing and lead to disappointment if not well understood.
Hello,
1audio is correct,
For many noise floor is confusing, averaging, sample size, sample rate and FFT window type all contribute.
Look at THD + Noise without the test generator and the software will total the noise power across the BW. This is the residue noise.
DT
Maybe the outcome with your L22 is more favorable, as Bob Bauman, the principal H/W engineer at Lynx, told me that in later renditions of the line driver, a 100nF cap was replaced with a zero ohm resistor. Which one exactly, he was reluctant to reveal. So I'm not sure whether the excessive SE distortion which I observed, has really been reduced in later versions of the L22.
Cheers, E.
Single ended issues
Indeed, very poor, not to say blunt. On the other hand, Bob Bauman, was way more responsive and admitted, that is, to a certain degree, that in later versions of the L22 sound card "something" has been corrected.
Cheers, E.
Hi Jan,
Indeed, very poor, not to say blunt. On the other hand, Bob Bauman, was way more responsive and admitted, that is, to a certain degree, that in later versions of the L22 sound card "something" has been corrected.
Cheers, E.
My experiences with Lynx Studio Technologies span at least 20 years, and they have always been exemplar. You seem to have the exception to the rule.
They have been extremely timely with their communications and solutions for me in a professional setting. (I have used equipment from them since the late 90s) Turn around for problems often in a matter of hours with custom drivers to address odd motherboard/card combination realities.
Cheers
Alan
They have been extremely timely with their communications and solutions for me in a professional setting. (I have used equipment from them since the late 90s) Turn around for problems often in a matter of hours with custom drivers to address odd motherboard/card combination realities.
Cheers
Alan
Still looking good, that's a relief
I assume this was with the cold input connected to ground?- OJG
I have an instrument here that uses it. it works great actually but its not practical for a 50 Ohm source. The power requirements are too high.
An alternative is to make the source completely floating and then it doesn't matter whether one side (or the other) is grounded or not. I have another instrument like this. With a 50 Ohm output it enables very low impedance attenuators which are useful for testing high gain circuits.
An alternative is to make the source completely floating and then it doesn't matter whether one side (or the other) is grounded or not. I have another instrument like this. With a 50 Ohm output it enables very low impedance attenuators which are useful for testing high gain circuits.