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Everything posted by attila
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Logic Detector as trigger in Scope. Is it possible?
attila replied to m72's question in Test and Measurement
Hi @m72 Thank you for the observation. It is fixed for the next version. -
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Hi @plswelcomeroh This is expected. It is the leakage current from the voltage monitor and setting rails. It can be minimize with a dummy load, like 1k resistor.
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Hi @JonD The Zmod Scope, AWG, Digitizer have SMA connectors. EclyplseZ7 is primarily a development board but it can be also be used with WaveForms. https://digilent.com/reference/programmable-logic/eclypse-z7/start https://digilent.com/reference/zmod/scope/reference-manual I'll try to add display modes after I return from holidays, tomorrow. The custom probes probably later since this may require more time to implement (due to the overlapping code) and I'll have to focus on nextgen devices.
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Hi @Steve Pratt Please use "CyclesMin" or "CyclesMax" It will be fixed in the next version.
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Suitability of AD3 as digitizer for the vhs-decode project
attila replied to joebobjoe's question in Test and Measurement
Hi @joebobjoe The AD3 can capture at up to 125MHz on up to 2 (8) channels up to 64k (2x32k) sample device buffer. The record streaming is also sampled at 16bit/channel, can work at up to 10MHz on 1 channel, 5MHz 2 channels. The inputs are differential and DC coupled, with BNC adapter single ended and AC/DC switch. The ADP3x50 and EclypseZ7 have device buffer of 128/256Mi samples, allowing to capture up to 125MHz on up to 4 channels. -
Testing Network and Impedance Analyzer using python
attila replied to kjhalek's question in Test and Measurement
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Audio Adapter + stereo mode performance debugging?
attila replied to Andy-205's question in Test and Measurement
Hi @Andy-205 The board has 4 layers: top, bottom, GNDA(left)|GND(right), V-(left)|V+(right) Pins 28-30 should reliably connect to TP1-3 since these are on GNDA, a large internal plane on the left side. I only have revA and B prototypes, so I'll have to ask my colleagues to check this next week. -
AD3 appearing in device manager but not detected by Waveforms
attila replied to nanderson's question in Test and Measurement
Hi @nanderson The AD does not use the COM port but a faster communication method with the device. The Virtual Com Port is disabled in the device eeprom, but this can be overridden from the computer. If this is enabled and an application opens this it will block WaveForms access to the device. Make sure the 'Load VCP' is unchecked, see: -
Digital Discovery software install error
attila replied to PS_Spectra7's question in Test and Measurement
Hi @PS_Spectra7 It looks like MSVC 14 is missing/broken on your system. Check the following to install it or from https://aka.ms/vs/17/release/vc_redist.arm64.exe -
Hi @JonD Do the Custom Probes need anything else than unit, attenuation and offset shift adjustment? Under Option you can find "Channel Editor" where channels can be configured quickly. (I think I added this after your earlier question in this topic.) You could also save project or workspace for different setups (probes, views... ). This may be more useful than having custom probe option. Segments Display, are you looking for the View/Persistence ? Persistence is also available in XY and XYZ view, and Spectrum Analyzer. Peak Detect, Channel # / Sample Mode: Min/Max There are no plans yet for 4 Channel Affordable Scope, but newer WaveForms versions provide dual mode which lets you control 2 identical devices at the same time. See the Help tab/ Waveforms/Device manager and AD3/System frequency 4 scope channels are available in ADP3450, EclypseZ7 with 2 Scope, Digitizer... Zmods
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Hi @Magda The magnitudeRatio is C1/C2 FFT magnitude at the frequency step.
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AD3 appearing in device manager but not detected by Waveforms
attila replied to nanderson's question in Test and Measurement
Hi @nanderson 1. Have you checked the used driver version, as shown in the other post ? I've seen 'broken' Windows where the driver files are not getting replaced. 2. To clean up the system from 'bad' drivers see the following post: 3. Verify the ftd2xx.dll version located in C:/Windows/System32 As a secondary solution you could try to copy C:\Program Files (x86)\Digilent\Runtime\UsbDriver\amd64\ ftd2xx64.dll so WaveForms to use the correct dll version to: C:\Program Files (x86)\Digilent\WaveForms3\ as ftd2xx.dll or for the entire system to: C:\Windows\System32\ as ftd2xx.dll -
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
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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.
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AD3 appearing in device manager but not detected by Waveforms
attila replied to nanderson's question in Test and Measurement
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/ -
Latency Between PC and Analog Discovery 2
attila replied to Abhijan's question in Test and Measurement
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 -
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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Digital Discovery Multiple Triggers Clarification
attila replied to sjn's question in Test and Measurement
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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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"Break" condition in UART protocol decoder
attila replied to TOIVI's question in Test and Measurement
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. -
Audio Adapter + stereo mode performance debugging?
attila replied to Andy-205's question in Test and Measurement
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. -
WaveForms Logic Analyzer: can't find a way to filter glitches?
attila replied to Alrie's question in Test and Measurement
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) -