What does the term “railed” mean in signal processing?What is the meaning of a Nyquist diagram in a...
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What does the term "railed" mean in signal processing?
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What does the term “railed” mean in signal processing?
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$begingroup$
I'm having trouble finding a definition of "railed" that relates to signal processing.
Am I correct in my guess that this term is in fact from this field?
My signal data comes from an EEG device. The lightly documented open source software I'm using doesn't define it, but it shows that term when there is no signal data being displayed.
Is that all it means (no data)? Or does it mean something like the signal being read is too great to be displayed or correctly measured?
signal-analysis
asked 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I'm having trouble finding a definition of "railed" that relates to signal processing.
Am I correct in my guess that this term is in fact from this field?
My signal data comes from an EEG device. The lightly documented open source software I'm using doesn't define it, but it shows that term when there is no signal data being displayed.
Is that all it means (no data)? Or does it mean something like the signal being read is too great to be displayed or correctly measured?
signal-analysis
asked 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I'm having trouble finding a definition of "railed" that relates to signal processing.
Am I correct in my guess that this term is in fact from this field?
My signal data comes from an EEG device. The lightly documented open source software I'm using doesn't define it, but it shows that term when there is no signal data being displayed.
Is that all it means (no data)? Or does it mean something like the signal being read is too great to be displayed or correctly measured?
signal-analysis
asked 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I'm having trouble finding a definition of "railed" that relates to signal processing.
Am I correct in my guess that this term is in fact from this field?
My signal data comes from an EEG device. The lightly documented open source software I'm using doesn't define it, but it shows that term when there is no signal data being displayed.
Is that all it means (no data)? Or does it mean something like the signal being read is too great to be displayed or correctly measured?
signal-analysis
signal-analysis
asked 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 10 hours ago
Hack-RHack-R
1235
asked 10 hours ago
Hack-RHack-R
1235
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
A railed signal, or a railing signal, seems to indicate a flatline. On BIOPAC, Railing signal (flatline) says:
When the amplified signal for any given channel exceeds the range -10
to +10 volts, the signal will rail. You will see a straight line at
-10 or + 10 volts (more likely the reading will be close 9.99 volts). The MP system is designed to work only in the range -10 to +10 volts.
The signal could rail for several reasons (which are not exclusive)...
From Amplifiers: What do rail-to-rail and single supply mean?
With respect to analog signals, a “rail” is a boundary that a signal
has to work within.
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
$endgroup$
1
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
add a comment |
$begingroup$
Just a guess.
From analog electronics, amplifiers typically have a DC voltage that supplies power to the circuit. The amplified output is typically limited to that voltage. When an output is clipped, it has been said that the output is at the rails.
Not really a dsp term but is a way to say that a waveform is clipped via the dynamic range of the system.
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
$endgroup$
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
add a comment |
$begingroup$
The answer given by @LaurentDuval is correct. I just wanted to also post the explanation I found in an ancient forum post right before reading his answer:
[Signal processing software] shows "Railed" when microvolt magnitudes for the channels are off the top end of the scale. In other words, generally it means
something wrong with the differential voltage measured between the
channel and the reference. Either one could have a poor connection
leading to "Railed".
One way to check consistency is to connect all three leads together, SRB2, Bias, and the channel(s) you are trying to measure.
You can do this with a glob of Ten20 paste or alligator clips. Once
you have all leads connected, that should produce 0 microvolts, or
close to it.
answered 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
A railed signal, or a railing signal, seems to indicate a flatline. On BIOPAC, Railing signal (flatline) says:
When the amplified signal for any given channel exceeds the range -10
to +10 volts, the signal will rail. You will see a straight line at
-10 or + 10 volts (more likely the reading will be close 9.99 volts). The MP system is designed to work only in the range -10 to +10 volts.
The signal could rail for several reasons (which are not exclusive)...
From Amplifiers: What do rail-to-rail and single supply mean?
With respect to analog signals, a “rail” is a boundary that a signal
has to work within.
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
$endgroup$
1
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
add a comment |
$begingroup$
A railed signal, or a railing signal, seems to indicate a flatline. On BIOPAC, Railing signal (flatline) says:
When the amplified signal for any given channel exceeds the range -10
to +10 volts, the signal will rail. You will see a straight line at
-10 or + 10 volts (more likely the reading will be close 9.99 volts). The MP system is designed to work only in the range -10 to +10 volts.
The signal could rail for several reasons (which are not exclusive)...
From Amplifiers: What do rail-to-rail and single supply mean?
With respect to analog signals, a “rail” is a boundary that a signal
has to work within.
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
$endgroup$
1
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
add a comment |
$begingroup$
A railed signal, or a railing signal, seems to indicate a flatline. On BIOPAC, Railing signal (flatline) says:
When the amplified signal for any given channel exceeds the range -10
to +10 volts, the signal will rail. You will see a straight line at
-10 or + 10 volts (more likely the reading will be close 9.99 volts). The MP system is designed to work only in the range -10 to +10 volts.
The signal could rail for several reasons (which are not exclusive)...
From Amplifiers: What do rail-to-rail and single supply mean?
With respect to analog signals, a “rail” is a boundary that a signal
has to work within.
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
$endgroup$
A railed signal, or a railing signal, seems to indicate a flatline. On BIOPAC, Railing signal (flatline) says:
When the amplified signal for any given channel exceeds the range -10
to +10 volts, the signal will rail. You will see a straight line at
-10 or + 10 volts (more likely the reading will be close 9.99 volts). The MP system is designed to work only in the range -10 to +10 volts.
The signal could rail for several reasons (which are not exclusive)...
From Amplifiers: What do rail-to-rail and single supply mean?
With respect to analog signals, a “rail” is a boundary that a signal
has to work within.
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
edited 9 hours ago
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
answered 10 hours ago
Laurent DuvalLaurent Duval
17k32163
17k32163
1
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
add a comment |
1
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
1
1
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
$begingroup$
Good, You'll find some reasons at the end of the link I gave. I'll upvote the other answers
$endgroup$
– Laurent Duval
9 hours ago
add a comment |
$begingroup$
Just a guess.
From analog electronics, amplifiers typically have a DC voltage that supplies power to the circuit. The amplified output is typically limited to that voltage. When an output is clipped, it has been said that the output is at the rails.
Not really a dsp term but is a way to say that a waveform is clipped via the dynamic range of the system.
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
$endgroup$
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
add a comment |
$begingroup$
Just a guess.
From analog electronics, amplifiers typically have a DC voltage that supplies power to the circuit. The amplified output is typically limited to that voltage. When an output is clipped, it has been said that the output is at the rails.
Not really a dsp term but is a way to say that a waveform is clipped via the dynamic range of the system.
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
$endgroup$
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
add a comment |
$begingroup$
Just a guess.
From analog electronics, amplifiers typically have a DC voltage that supplies power to the circuit. The amplified output is typically limited to that voltage. When an output is clipped, it has been said that the output is at the rails.
Not really a dsp term but is a way to say that a waveform is clipped via the dynamic range of the system.
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
$endgroup$
Just a guess.
From analog electronics, amplifiers typically have a DC voltage that supplies power to the circuit. The amplified output is typically limited to that voltage. When an output is clipped, it has been said that the output is at the rails.
Not really a dsp term but is a way to say that a waveform is clipped via the dynamic range of the system.
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
answered 10 hours ago
Stanley PawlukiewiczStanley Pawlukiewicz
6,7212623
6,7212623
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
add a comment |
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
$begingroup$
Thank you! This sounds accurate and matches the other info that was also just posted by Laurent then myself. :)
$endgroup$
– Hack-R
10 hours ago
add a comment |
$begingroup$
The answer given by @LaurentDuval is correct. I just wanted to also post the explanation I found in an ancient forum post right before reading his answer:
[Signal processing software] shows "Railed" when microvolt magnitudes for the channels are off the top end of the scale. In other words, generally it means
something wrong with the differential voltage measured between the
channel and the reference. Either one could have a poor connection
leading to "Railed".
One way to check consistency is to connect all three leads together, SRB2, Bias, and the channel(s) you are trying to measure.
You can do this with a glob of Ten20 paste or alligator clips. Once
you have all leads connected, that should produce 0 microvolts, or
close to it.
answered 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
The answer given by @LaurentDuval is correct. I just wanted to also post the explanation I found in an ancient forum post right before reading his answer:
[Signal processing software] shows "Railed" when microvolt magnitudes for the channels are off the top end of the scale. In other words, generally it means
something wrong with the differential voltage measured between the
channel and the reference. Either one could have a poor connection
leading to "Railed".
One way to check consistency is to connect all three leads together, SRB2, Bias, and the channel(s) you are trying to measure.
You can do this with a glob of Ten20 paste or alligator clips. Once
you have all leads connected, that should produce 0 microvolts, or
close to it.
answered 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
The answer given by @LaurentDuval is correct. I just wanted to also post the explanation I found in an ancient forum post right before reading his answer:
[Signal processing software] shows "Railed" when microvolt magnitudes for the channels are off the top end of the scale. In other words, generally it means
something wrong with the differential voltage measured between the
channel and the reference. Either one could have a poor connection
leading to "Railed".
One way to check consistency is to connect all three leads together, SRB2, Bias, and the channel(s) you are trying to measure.
You can do this with a glob of Ten20 paste or alligator clips. Once
you have all leads connected, that should produce 0 microvolts, or
close to it.
answered 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
The answer given by @LaurentDuval is correct. I just wanted to also post the explanation I found in an ancient forum post right before reading his answer:
[Signal processing software] shows "Railed" when microvolt magnitudes for the channels are off the top end of the scale. In other words, generally it means
something wrong with the differential voltage measured between the
channel and the reference. Either one could have a poor connection
leading to "Railed".
One way to check consistency is to connect all three leads together, SRB2, Bias, and the channel(s) you are trying to measure.
You can do this with a glob of Ten20 paste or alligator clips. Once
you have all leads connected, that should produce 0 microvolts, or
close to it.
answered 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 10 hours ago
Hack-RHack-R
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 10 hours ago
Hack-RHack-R
1235
answered 10 hours ago
Hack-RHack-R
1235
1235
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Hack-R is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
Hack-R is a new contributor. Be nice, and check out our Code of Conduct.
Hack-R is a new contributor. Be nice, and check out our Code of Conduct.
Hack-R is a new contributor. Be nice, and check out our Code of Conduct.
Hack-R is a new contributor. Be nice, and check out our Code of Conduct.
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