Hi All, newbie here looking for some measurement guidance. Hopefully I post this topic in the right place.
I have QuantAsylum QA401 and I borrow my friend's RME ADI-2 Pro. I would like to measure the SNR and SINAD of the line output.
The setup is as the following:
ASUS Laptop USB C with foobar playing 1 kHz tone (96k-24bit) using WASAPI driver >>
RME ADI-2 Pro Unbalanced Line Out (TS socket) with TS to RCA adapter >>
Belden 1505F coaxial cable (50cm - DIY with Canare RCA to BNC) >>
BNC splittler with 10k ohm resistor on the other end >>
QuantAsylum QA401 positive BNC input.
As shown in the pictures:
The QuantAsylum QA401 negative inputs were terminated using 50 ohms BNC termination.
RME ADI-2 Pro Output level was set to +4 dBU reference level, and volume was at 0 dB.
What I don't understand is, measurement showing only:
SNR: 89.5 dBA (@ ~1Vrms)
SINAD: 88.3 dB (@ ~1Vrms)
A weighted:
No weighting:
I expect to get much higher SNR and SINAD from a high end audio interface like this RME ADI-2 Pro, at least on the 100 dB range as it is still within the sensitivity range of the QA401. I don't understand why I couldn't get anything better than 90 dB. Tried other settings on the RME, different Ref level, different volume, result were all close to 89-90 dBA SNR.
The RME connected to my ASUS notebook on USB C port, and powered by 3x 18650 battery for cleanest possible power supply.
Hopefully someone could point to me what's wrong with the setup, and why SNR and SINAD measurement result were relatively low in comparison to the equipment specs.
Thanks in advance!
I have QuantAsylum QA401 and I borrow my friend's RME ADI-2 Pro. I would like to measure the SNR and SINAD of the line output.
The setup is as the following:
ASUS Laptop USB C with foobar playing 1 kHz tone (96k-24bit) using WASAPI driver >>
RME ADI-2 Pro Unbalanced Line Out (TS socket) with TS to RCA adapter >>
Belden 1505F coaxial cable (50cm - DIY with Canare RCA to BNC) >>
BNC splittler with 10k ohm resistor on the other end >>
QuantAsylum QA401 positive BNC input.
As shown in the pictures:
The QuantAsylum QA401 negative inputs were terminated using 50 ohms BNC termination.
RME ADI-2 Pro Output level was set to +4 dBU reference level, and volume was at 0 dB.
What I don't understand is, measurement showing only:
SNR: 89.5 dBA (@ ~1Vrms)
SINAD: 88.3 dB (@ ~1Vrms)
A weighted:
No weighting:
I expect to get much higher SNR and SINAD from a high end audio interface like this RME ADI-2 Pro, at least on the 100 dB range as it is still within the sensitivity range of the QA401. I don't understand why I couldn't get anything better than 90 dB. Tried other settings on the RME, different Ref level, different volume, result were all close to 89-90 dBA SNR.
The RME connected to my ASUS notebook on USB C port, and powered by 3x 18650 battery for cleanest possible power supply.
Hopefully someone could point to me what's wrong with the setup, and why SNR and SINAD measurement result were relatively low in comparison to the equipment specs.
Thanks in advance!
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