I am wondering, are the distortion, noise, and channel separation specs the same for balanced and single ended output?
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I would appreciate some more Info on the remote control interface. Is there something like a programming reference-manual? In which way do we have access to API? Virtual COM-port? HID-Device?
I hope the ranges can not only be set, a read-back function of the the current attenuation/amplification setting would be necessary to implement something like the autoranger.
Thanks.
I hope the ranges can not only be set, a read-back function of the the current attenuation/amplification setting would be necessary to implement something like the autoranger.
Thanks.
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@soongsc
The balanced outputs are implemented as identical buffers, just with opposite polarity, so the performance should be very similar. The noise from ground loops can of course be a challenge with the single ended signal (as usual).
@BlacK_Chicken
The remote control interface is implemented via HID.
It does support read-back as well as control.
I do have a description of the interface. I will check if and how I can make it available.
Jens
The balanced outputs are implemented as identical buffers, just with opposite polarity, so the performance should be very similar. The noise from ground loops can of course be a challenge with the single ended signal (as usual).
@BlacK_Chicken
The remote control interface is implemented via HID.
It does support read-back as well as control.
I do have a description of the interface. I will check if and how I can make it available.
Jens
I don't have a specification of the jitter. I use two very low phase noise crystal oscillators from this series:
NZ2520SD(OA / AV)/Crystal Clock Oscillators/NDK
These are located between the ADC and the DAC, with short connections to both.
I don't have access to test equipment that can verify this low level of jitter though.
NZ2520SD(OA / AV)/Crystal Clock Oscillators/NDK
These are located between the ADC and the DAC, with short connections to both.
I don't have access to test equipment that can verify this low level of jitter though.
When I wrote that I don't have access to test equipment that can measure this low level of jitter I meant that I don't personally have that kind of equipment or muck experience in how to use it. We probably have spectrum analyzers at RTX that could measure the phase noise. But that would only verify the crystal oscillator and buffer, not the whole chain.
I agree that the whole chain is important. What kind of effect on the current measured data will clock jitter have? If there is a significant enough effect, it would show up in certain tests as well. How would that further effect our measurements when we use this device? I am sure by this would be an interesting issue for V2.
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Hi soongsc,
Well, he is getting the measured performance on the prototypes. I'd say the jitter might be of academic interest, but the jitter is less than that required to get this level of performance. It's unlikely most test equipment manufacturers will give you this information.
Whatever the jitter really is, it's good enough.
-Chris
Well, he is getting the measured performance on the prototypes. I'd say the jitter might be of academic interest, but the jitter is less than that required to get this level of performance. It's unlikely most test equipment manufacturers will give you this information.
Whatever the jitter really is, it's good enough.
-Chris
It looks like fan outlets on the back. Did you measure this in the full production configuration i.e. a ready to ship built box? Vibration and fan power draw could have a negative effect on measurements.
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