attila
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Posts posted by attila
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Hi @Leo_W
On AD2 the user supplies are on the right side of the board on the top and bottom.
https://digilent.com/reference/test-and-measurement/analog-discovery-2/hardware-design-guide#user_voltage_supplies
The L8 is next to the FPGA and L9 closed to the right-bottom corner. -
Hi @nanderson
It is probably an issue with the FTDI driver.
Disconnect the device and reinstall WaveForms (check Adept Runtime section which includes the driver) or install the driver manually from:
https://ftdichip.com/wp-content/uploads/2023/09/CDM-v2.12.36.4-WHQL-Certified.zip
https://ftdichip.com/drivers/d2xx-drivers/ -
Hi @Abhijan
The latency is approximately the configuration time which is approximately 1ms, 0.125 to 4ms. It depends on the host controller, hub, buffer/waveform size, if AM/FM is used...
AnalogOut_Test.py with AD2
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Hi @Magda
For W1-C1-DUT-C2-R-GND is:
re = magnitudeRatio*cos(phase)
im = magnitudeRatio*sin(phase)
gp = 1.0/rReferece + 1.0/rProbe
bp = cProbe*2*PI*hz
y = gp^2 + bp^2
rs = (im*bp+gp*(re-1))/y
xs = (im*gp-bp*(re-1))/y
+ open/short compensation -
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Hi @dmangione
The Play stopped working when the DDR RAM oscilloscope buffering was introduced and the AWG buffer size was increased.
It will be fixed in the next version.
Thank you for the observation.
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Hi @Sid Price
It was corrected long time ago. The beak trigger negative pulse longer than 10 bits (1+8+1+parity), for 19.2kHz >520.832us
In capture it looks like there is an extra parity bit. Make sure to configure the interpreter correctly.
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Hi @Andy-205
The audio/scope inputs have separate ground (GNDA) for better isolation from the rest of the adapter.
The Wavegen output amplifier is powered by the V+/- power supplies channels and the ferrites are for filtering.
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Hi @Alrie
To reduce crosstalk between wires try twisting each signal wire with GND or at least the critical ones like CS and CLK
Make sure the digital IO voltage is set correctly since this also adjust the input logic threshold (about half of the VIO)
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Hi @BFisher
You could print it like this:
var dt = new Date();
print(dt.toISOString()); // -> 2024-01-05T10:41:16.768Z -
Hi @fizzbang
Thank you for the observation.
@JColvin probably knows who the editor of this guide is.
https://digilent.com/reference/test-and-measurement/guides/waveforms-network-analyzer -
Hi @Andy-205
Make sure to enable the power supplies, see:
https://digilent.com/reference/add-ons/audio-adapter-plus/getting-started
https://digilent.com/reference/add-ons/audio-adapter-plus/start -
Hi @bfpa40
Don't you have a USB contact problem ? Have you tried using a different port or cable ?
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Hi @bfpa40
Could you try updating with another OS and/or computer ?
I've just tested updating from WF 3.16.1 fw:33C and from failsafe fw:331, with Linux and Windows, and it is working for me. -
Hi @Karneades
No, since the Math channels are performed in the software (application).
Eventually you could export longer Math channel data and import it in Wavegen to Play. -
Hi @Oleg
The samples are 16 bits, so 4 channels take 8 bytes, x 1M samples = 8MB, / 40MBps = 0.2 sec to transfer
However the captures can be performed much faster, at up to 1GBps, 125MHz x 4 channels
See the following example with device buffering: AnalogIn_Buffers.py
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Hi @qwertylex
The Record capture in the application is limited to 200M samples/channel, 200sec @ 1MHz
Allowing Math channels in "Record to File" could slow down the process causing device buffer overflow.
With AD3, ADP3X50... you also have in device filter channels.
To visualize imported high values, change the Channel's Attenuation to adjusts the selectable Range, like with 100X it lets to set 500V/div.
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Hi @BFisher
For reception in Protocol the device only stores the protocol specific bits so there is no time information memorized. The View/ Stamp inserts informative software time stamps.
For timing analysis use the Logic Analyzer. For newer devices (DigitalDiscovery, AD3, ADP3X50...) a precise trigger time stamp (based on device RTC) is stored for each capture. -
Hi @fizzbang
The default reference channel in the application is Channel 1 but this can be changed under Phase / Ref
It is mentioned in 2.2 "set the phase reference to channel 2" https://digilent.com/reference/test-and-measurement/guides/waveforms-network-analyzer
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Hi @bfpa40
Are you using USB connection to the device ? If not, try this.
If you are not using the Ethernet connection disable it, since without link it could cause initial boot or communication delays.
From which WaveForms version and Firmware version are you trying to update ?
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Hi @Dan N
Use Record Mode and Export.
The in device filters are real-time, provides in-device routing from Scope to AWG signal or modulation, but are limited in taps/order compared to (software) Math channels.
For ADP3X50 and EclypseZ7 normal capture mode can be used since these provide 128&256Mi sample device buffer.
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Hi @Oleg
The 10ms should be sufficient for the acqmodeSingle to transfer the capture to the computer and rearm for the next capture.
ADP3X50 lets you capture up to 128Mi samples on up to 4 channels at up to 125MHz. For this acqmodeSingle or Record can be used.
The acqmodeRecord is intended to be used for larger captures than the device buffer using data streaming.
ADP3X50 also provides device buffering (memory segmentation) with <1us latency between captures which can be enabled with FDwfAnalogInBuffersSet.
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Hi @KatharinaSt
Create a custom waveform (Type/Cog/New) like this, Frequency 1.5ms, Run: 2s (pic1)
The repeat Trigger option (the last checkbox) selects to rearm for each Wait-Run cycle, or unchecked will only arm initially, once triggered repeat Wait-Run the specified number of times without rearming. (pic2)
Can't run Waveforms 3.21.3 on RPI CM4
in Test and Measurement
Posted
Hi @ApplePi
It looks like the dependency was added for amd64 and i386 but not for armhf and arm64.
It is fixed from 3.21.20