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Simulate it, it'll keep you occupied for hours.Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
I assume you mean the AC signal is applied to the DAC resistor chainHi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
---On Mar 4, 6:11 am, N0S...@daqarta.com (Bob Masta) wrote:
On Tue, 3 Mar 2009 22:47:02 -0800 (PST),
GreenXenon <glucege...@gmail.com> wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.
To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.
Best regards,
Bob Masta
DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?
---A DAC is not meant to receive analog signal,
---So I suspect something weird and interesting might occur.
On Tue, 3 Mar 2009 22:47:02 -0800 (PST),
GreenXenon <glucege...@gmail.com> wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.
To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.
Best regards,
Bob Masta
DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
http://webpages.charter.net/jamie_5"
No, its a well known troll, formerly radium.
On Wed, 4 Mar 2009 15:01:13 -0800 (PST), GreenXenon
glucege...@gmail.com> wrote:
On Mar 4, 6:11 am, N0S...@daqarta.com (Bob Masta) wrote:
On Tue, 3 Mar 2009 22:47:02 -0800 (PST),
GreenXenon <glucege...@gmail.com> wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.
To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.
Best regards,
Bob Masta
DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?
---
In amplitude only.
---
A DAC is not meant to receive analog signal,
---
Yes, it is. The reference input.
Are you trolling again?
---
So I suspect something weird and interesting might occur.
---
Not at all weird, but quite interesting in that the DAC acts like a
digital attenuator.
Here's as good a place as any to start your pilgrimage:
http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/dac.html#c3
Google "R-2R ladder" for further enlightenment.
JF
On Wed, 4 Mar 2009 15:01:13 -0800 (PST), GreenXenon
glucegen1x@gmail.com> wrote:
On Mar 4, 6:11 am, N0S...@daqarta.com (Bob Masta) wrote:
On Tue, 3 Mar 2009 22:47:02 -0800 (PST),
GreenXenon <glucege...@gmail.com> wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.
To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.
Best regards,
Bob Masta
DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?
---
In amplitude only.
---
A DAC is not meant to receive analog signal,
---
Yes, it is. The reference input.
Are you trolling again?
---
So I suspect something weird and interesting might occur.
---
Not at all weird, but quite interesting in that the DAC acts like a
digital attenuator.
Here's as good a place as any to start your pilgrimage:
http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/dac.html#c3
Google "R-2R ladder" for further enlightenment.
JF
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
---On Mar 4, 3:49 pm, John Fields <jfie...@austininstruments.com> wrote:
On Wed, 4 Mar 2009 15:01:13 -0800 (PST), GreenXenon
Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?
---
In amplitude only.
---
So the frequency and phase of both signals will be the same?
Google "R-2R ladder" for further enlightenment.A DAC is not meant to receive analog signal,
---
Yes, it is. The reference input.
Are you trolling again?
---
So I suspect something weird and interesting might occur.
---
Not at all weird, but quite interesting in that the DAC acts like a
digital attenuator.
So the analog signal's peak-to-peak amplitude will decrease after
being passed through the DAC?
---
A.K.A. Multiplying DACOn Mar 4, 3:49 pm, John Fields <jfie...@austininstruments.com> wrote:
On Wed, 4 Mar 2009 15:01:13 -0800 (PST), GreenXenon
glucege...@gmail.com> wrote:
On Mar 4, 6:11 am, N0S...@daqarta.com (Bob Masta) wrote:
On Tue, 3 Mar 2009 22:47:02 -0800 (PST),
GreenXenon <glucege...@gmail.com> wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Assuming you are talking about a multiplying DAC,
you will essentially have a digital volume control
for the analog signal. The problem is that it
will have a linear control range, not a
logarithmic ("audio taper") range.
To do this, you use the analog signal as the
reference voltage of the DAC. Note that not all
DACs (and not even all multiplying DACs) can
handle a bipolar reference. If yours can't, you
just need to add the appropriate offset (and
subtract afterwards), or AC-couple the signal and
sum it with the normal reference so that the sum
runs between 0 and the positive supply.
Best regards,
Bob Masta
DAQARTA v4.51
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
Lets say the analog signal is plotted on a graph two times, once
before passing through the DAC and once after -- how will the two
graphs differ?
---
In amplitude only.
---
So the frequency and phase of both signals will be the same?
A DAC is not meant to receive analog signal,
---
Yes, it is. The reference input.
Are you trolling again?
---
So I suspect something weird and interesting might occur.
---
Not at all weird, but quite interesting in that the DAC acts like a
digital attenuator.
Yes, multiplied by the DAC setting.So the analog signal's peak-to-peak amplitude will decrease after
being passed through the DAC?
Or "Multiplying A/D Converter"Here's as good a place as any to start your pilgrimage:
http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/dac.html#c3
Google "R-2R ladder" for further enlightenment.
<snip>In article <42040106-9341-4eda-9e86-4c43d5ca5485
@o2g2000prl.googlegroups.com>, glucegen1x@gmail.com says...
On Mar 4, 3:49 pm, John Fields <jfie...@austininstruments.com> wrote:
Sorry, "Multiplying D/A Converter"Here's as good a place as any to start your pilgrimage:
http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/dac.html#c3
Google "R-2R ladder" for further enlightenment.
Or "Multiplying A/D Converter"
Jamie wrote:
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
No, and if you knew what you claim about electronics you would know
that it works, and the limitations.
You know, You are a complete asshole !...
Michael A. Terrell wrote:
Jamie wrote:
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
No, and if you knew what you claim about electronics you would know
that it works, and the limitations.
You know, You are a complete asshole !...
One should question as to who really knows what they are doing.
You must of wasted a lot of employers money over the years, you
wouldn't last long where I work.
Jamie wrote:
Michael A. Terrell wrote:
Jamie wrote:
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
No, and if you knew what you claim about electronics you would know
that it works, and the limitations.
You know, You are a complete asshole !...
One should question as to who really knows what they are doing.
You must of wasted a lot of employers money over the years, you
wouldn't last long where I work.
I would never work anywhere that they would hire a loser like you. I
saved Microdyne, my last employer a lot of money by improving both
manufacturing and test processes, as well as doing enough extra work in
one night to make sure they received a half million dollar bonus for
shipping some equipment ahead of schedule. My boss would tell me that I
wouldn't take no for an answer, because I would take a problem directly
to the president of the company if someone tried to ignore a problem. I
took some test processes from half a day down to 18 minutes per board by
improving the test fixtures, and having some parts changed from 1% to
0.1% tolerance and adding a precision voltage reference in the fixture.
I worked in engineering to move their RCB2000 & DR2000 designs from
hand built prototypes to the production floor, including writing a lot
of the test procedures, an building test fixtures. A lot of minor
changes to the design had to be made to make it easier to build, and
service, if needed. It also required a complete overhaul of our reflow
process, because of the smaller SMD components we had to use to get
everything one the VME style circuit boards. The Telemetry receiver was
a dual DSP based system with a 70 MHz 40 MHz wide IF that was digitized
and processed with DSP and FIR filters. It included digital combiner to
provide the best possible data recovery and sold for around $80,000,
depending on the options installed.
the system aboard the ISS was a modified 700 series, that was mounted
in one of the aluminum rack modules and powered directly from the 48
volt power buss aboard the ISS. That receiver used a DAC as a volume
control, and it worked quite well. The video level was controlled by a
DAC to provide the control voltage for a four quadrant multiplier to
give a very linear 39 dB range, and an additional 24 dB gain stage
extended it to 63 dB in .1 dB steps. We went that route because a few
customers needed more than the standard 20 MHz video bandwidth. The
other modifications were to allow the unit to be controlled by a
computer system aboard the ISS.
My work is in orbit aboard the ISS, used by NASA to communicate with
every satellite the US has in orbit, NOAA receives their weather
satellite photos from their LEO satellites with a turn key package we
built for their Wallops Island facility, and the ESA bought two complete
systems for their space program. One is fixed at the launch site, while
the other is in a larger communications trailer they tow to a remote
site during a launch, along with a lot of military tracking systems.
All you ever do is post stupid ideas and bad information. Keep it up.
Anyone who knows electronics sees that you are a fraud. You make vague
references about your 'job', but don't tell where you work because you
don't want them to see the way you look online.
Er, this isn't alt.personality.ego-massage you know?
---Michael A. Terrell wrote:
Jamie wrote:
Michael A. Terrell wrote:
Jamie wrote:
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
No, and if you knew what you claim about electronics you would know
that it works, and the limitations.
You know, You are a complete asshole !...
One should question as to who really knows what they are doing.
You must of wasted a lot of employers money over the years, you
wouldn't last long where I work.
I would never work anywhere that they would hire a loser like you. I
saved Microdyne, my last employer a lot of money by improving both
manufacturing and test processes, as well as doing enough extra work in
one night to make sure they received a half million dollar bonus for
shipping some equipment ahead of schedule. My boss would tell me that I
wouldn't take no for an answer, because I would take a problem directly
to the president of the company if someone tried to ignore a problem. I
took some test processes from half a day down to 18 minutes per board by
improving the test fixtures, and having some parts changed from 1% to
0.1% tolerance and adding a precision voltage reference in the fixture.
I worked in engineering to move their RCB2000 & DR2000 designs from
hand built prototypes to the production floor, including writing a lot
of the test procedures, an building test fixtures. A lot of minor
changes to the design had to be made to make it easier to build, and
service, if needed. It also required a complete overhaul of our reflow
process, because of the smaller SMD components we had to use to get
everything one the VME style circuit boards. The Telemetry receiver was
a dual DSP based system with a 70 MHz 40 MHz wide IF that was digitized
and processed with DSP and FIR filters. It included digital combiner to
provide the best possible data recovery and sold for around $80,000,
depending on the options installed.
the system aboard the ISS was a modified 700 series, that was mounted
in one of the aluminum rack modules and powered directly from the 48
volt power buss aboard the ISS. That receiver used a DAC as a volume
control, and it worked quite well. The video level was controlled by a
DAC to provide the control voltage for a four quadrant multiplier to
give a very linear 39 dB range, and an additional 24 dB gain stage
extended it to 63 dB in .1 dB steps. We went that route because a few
customers needed more than the standard 20 MHz video bandwidth. The
other modifications were to allow the unit to be controlled by a
computer system aboard the ISS.
My work is in orbit aboard the ISS, used by NASA to communicate with
every satellite the US has in orbit, NOAA receives their weather
satellite photos from their LEO satellites with a turn key package we
built for their Wallops Island facility, and the ESA bought two complete
systems for their space program. One is fixed at the launch site, while
the other is in a larger communications trailer they tow to a remote
site during a launch, along with a lot of military tracking systems.
All you ever do is post stupid ideas and bad information. Keep it up.
Anyone who knows electronics sees that you are a fraud. You make vague
references about your 'job', but don't tell where you work because you
don't want them to see the way you look online.
Er, this isn't alt.personality.ego-massage you know?
We're happy for you, really, but you may injure yourself by blowing your
own trumpet so hard.
Michael A. Terrell wrote:
Jamie wrote:
Michael A. Terrell wrote:
Jamie wrote:
GreenXenon wrote:
Hi:
What will happen if an analog signal is passed through a DAC [Digital-
to-Analog Converter]?
Thanks
Is that a trick question ?
No, and if you knew what you claim about electronics you would know
that it works, and the limitations.
You know, You are a complete asshole !...
One should question as to who really knows what they are doing.
You must of wasted a lot of employers money over the years, you
wouldn't last long where I work.
I would never work anywhere that they would hire a loser like you. I
saved Microdyne, my last employer a lot of money by improving both
manufacturing and test processes, as well as doing enough extra work in
one night to make sure they received a half million dollar bonus for
shipping some equipment ahead of schedule. My boss would tell me that I
wouldn't take no for an answer, because I would take a problem directly
to the president of the company if someone tried to ignore a problem. I
took some test processes from half a day down to 18 minutes per board by
improving the test fixtures, and having some parts changed from 1% to
0.1% tolerance and adding a precision voltage reference in the fixture.
I worked in engineering to move their RCB2000 & DR2000 designs from
hand built prototypes to the production floor, including writing a lot
of the test procedures, an building test fixtures. A lot of minor
changes to the design had to be made to make it easier to build, and
service, if needed. It also required a complete overhaul of our reflow
process, because of the smaller SMD components we had to use to get
everything one the VME style circuit boards. The Telemetry receiver was
a dual DSP based system with a 70 MHz 40 MHz wide IF that was digitized
and processed with DSP and FIR filters. It included digital combiner to
provide the best possible data recovery and sold for around $80,000,
depending on the options installed.
the system aboard the ISS was a modified 700 series, that was mounted
in one of the aluminum rack modules and powered directly from the 48
volt power buss aboard the ISS. That receiver used a DAC as a volume
control, and it worked quite well. The video level was controlled by a
DAC to provide the control voltage for a four quadrant multiplier to
give a very linear 39 dB range, and an additional 24 dB gain stage
extended it to 63 dB in .1 dB steps. We went that route because a few
customers needed more than the standard 20 MHz video bandwidth. The
other modifications were to allow the unit to be controlled by a
computer system aboard the ISS.
My work is in orbit aboard the ISS, used by NASA to communicate with
every satellite the US has in orbit, NOAA receives their weather
satellite photos from their LEO satellites with a turn key package we
built for their Wallops Island facility, and the ESA bought two complete
systems for their space program. One is fixed at the launch site, while
the other is in a larger communications trailer they tow to a remote
site during a launch, along with a lot of military tracking systems.
All you ever do is post stupid ideas and bad information. Keep it up.
Anyone who knows electronics sees that you are a fraud. You make vague
references about your 'job', but don't tell where you work because you
don't want them to see the way you look online.
Er, this isn't alt.personality.ego-massage you know?
We're happy for you, really, but you may injure yourself by blowing your
own trumpet so hard.