[chbot] Diligent USB test tools
Mark Atherton
markaren1 at xtra.co.nz
Sun Apr 9 08:06:08 BST 2017
Which Salaea do you have Charles ?
-Mark
On 9/04/2017 6:24 PM, Charles Manning wrote:
> I'm with Mike on this.
>
> Nice looking kit, but a real pity it only has 16k buffers.
>
> Being able to stream with the Salaea makes for something quite
> amazing. I've used it for logging, then analysing many hours of samples.
>
>
> On Sun, Apr 9, 2017 at 3:24 PM, Matthew Pike
> <jumbledthoughts389 at hotmail.com
> <mailto:jumbledthoughts389 at hotmail.com>> wrote:
>
> Seems like my shopping kart link doesn't work (at least not on my
> smart phone).
> These are the items I was referring to:
>
> $442.86 Analog Discovery 2
> http://www.digikey.co.nz/product-detail/en/digilent-inc/410-321/1286-1117-ND/5810115
> <http://www.digikey.co.nz/product-detail/en/digilent-inc/410-321/1286-1117-ND/5810115>
> $23.79 Set of 6 Mini Grabbers
> http://www.digikey.co.nz/product-detail/en/digilent-inc/240-052/1286-1050-ND/4090099
> <http://www.digikey.co.nz/product-detail/en/digilent-inc/240-052/1286-1050-ND/4090099>
> $31.73 BNC Adaptor board
> http://www.digikey.co.nz/product-detail/en/digilent-inc/410-263/1286-1073-ND/4840860
> <http://www.digikey.co.nz/product-detail/en/digilent-inc/410-263/1286-1073-ND/4840860>
> $31.73 2 BNC Oscilloscope Probes
> http://www.digikey.co.nz/product-detail/en/digilent-inc/460-004/1286-1075-ND/4840870
> <http://www.digikey.co.nz/product-detail/en/digilent-inc/460-004/1286-1075-ND/4840870>
> $530.11 (Total)
>
> I can stand to skip the mini grabbers, and maybe get cheaper BNC
> probes elsewhere, but I am still looking at ~$500.
> That's the most I've every considered spending on electronics
> equipment. Christchurch Robotics may be bad for my wallet :)
>
>
> Matt Pike
>
>
> On 8/04/2017 11:09 a.m., Matthew Pike wrote:
>>
>> Looks good to me - I'm going for the Pro Bundle, as I'd like some
>> BNC scope probes with it.
>>
>> Here's a shopping kart at Digi-Key, with the equivalent items.
>> $530.11. (http://www.digikey.co.nz/short/3w53b8
>> <http://www.digikey.co.nz/short/3w53b8>)
>>
>> If you just want the scope, $442.86 from Digi-Key. Much better
>> than Element 14 or RS-Online
>>
>>
>> Matt Pike
>>
>>
>> On 5/04/2017 6:57 a.m., Mike Field wrote:
>>> If anybody wants to try before they buy I can lend you mine for
>>> a few days.
>>>
>>> Pretty much a jack of all trades, master of none - main
>>> restriction being usable bandwidth and sample buffer sizes are
>>> limited.
>>>
>>> For purely digital work a Saleae is 100x better as samples are
>>> streamed to the PC for analysis and decode.
>>>
>>> For analogue work a low end Scope with real probes is
>>> better/usable, and has more bandwidth.
>>>
>>> Any bench PSU would be a better PSU.
>>>
>>> But it is integration of all the functions that is awesome, esp
>>> between the signal generator and the scope inputs (so you can
>>> test phase and freq response of the system under test).
>>>
>>> However it does fit in the palm of your hand, making it handy if
>>> working within its limitations. Much like any Swiss Army
>>> Knife/Leatherman tool I guess
>>>
>>> Mike
>>>
>>>
>>>
>>> -------- Original Message --------
>>> Subject: [chbot] Diligent USB test tools
>>> From: Mark Atherton
>>> To: Christchurch Robotics
>>> CC:
>>>
>>>
>>> All,
>>>
>>> Have just been forwarded this message, and am taking the
>>> liberty of
>>> passing it on, since it had been forwarded sever times
>>> before it reached
>>> me...
>>>
>>> Looks like they are $568.84 from element 14, even so, an
>>> interesting
>>> piece of kit.
>>>
>>> -Mark
>>>
>>> =========================
>>>
>>> Just received an Analog Discovery 2 unit for $279 -
>>> http://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/
>>> <http://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/>
>>>
>>> - Farnell have them for about GBP 220
>>> http://uk.farnell.com/digilent/410-321/oscilloscope-usb-2-ch-30mhz-100msps/dp/2528523
>>> <http://uk.farnell.com/digilent/410-321/oscilloscope-usb-2-ch-30mhz-100msps/dp/2528523>
>>>
>>> .
>>>
>>> This is an interesting bit of kit - it's a cooperation
>>> between Analog
>>> Devices (who do all the signal conditioning and interfacing)
>>> and Xilinx,
>>> who do the logic, but put together by Digilent, who sell Xilinx
>>> development systems... Initially just a reference design,
>>> i.e. a
>>> technical paper, they realised that they had something
>>> pretty neat on
>>> their hands, so made it a product.
>>>
>>> The design has turned into a really cool bit of kit at a
>>> very acceptable
>>> price - a full design rationale is available as are all the
>>> schematics
>>> etc. in the reference manual (also on the Farnell page). Its
>>> a really
>>> nice unit... Two programmable supplies, 2 waveform generator
>>> channels,
>>> 16 logic channels. Lots of analog too. 14-bit A/D/A as well,
>>> not the
>>> usual 12-bit...
>>>
>>> Very few compromises have been made - by using 14-bit DACs
>>> and ADCs, it
>>> compares very favorably with far more expensive units. The
>>> software is
>>> also extremely stable.
>>>
>>> As a small unit to keep with the laptop, there's not a lot
>>> to argue
>>> about... I keep mine with the laptop at all times. The
>>> wiring harnesses
>>> are only $10/each, so I leave those attached to the boards
>>> I'm working
>>> on - the WaveForms (free) software has the concept of
>>> projects which
>>> contain the configurations of all the devices on the AD2
>>> that you are
>>> using for each setup, so switching boards takes literally a
>>> minute (or
>>> less).
>>>
>>> I was using it on the flight from the UK back to the UAE
>>> last week - I
>>> had my laptop out, a Texas Instruments MSP-EXP430FR5969
>>> development
>>> board and the Analog Discovery - 6 hours of uninterrupted
>>> development
>>> time - USB-powered dev environments are wonderful. No
>>> problems from
>>> other passengers or the crew - I told the steward in advance
>>> I was an EE
>>> and that I'd be working on the 'plane - I also made sure to
>>> keep any
>>> blinking LEDs concealed
>>>
>>> I also have the probe expansion board - just so cute!
>>>
>>> * Two-channel USB digital oscilloscope (1MΩ, ±25V,
>>> differential,
>>> 14-bit, 100MS/s, 30MHz+ bandwidth - with the Analog
>>> Discovery BNC
>>> Adapter Board
>>> * Two-channel arbitrary function generator (±5V, 14-bit,
>>> 100MS/s,
>>> 12MHz+ bandwidth - with the Analog Discovery BNC Adapter Board
>>> * Stereo audio amplifier to drive external headphones or
>>> speakers
>>> with replicated AWG signals
>>> * 16-channel digital logic analyzer (3.3V CMOS and 1.8V or 5V
>>> tolerant, 100MS/s)
>>> * 16-channel pattern generator (3.3V CMOS, 100MS/s)
>>> * 16-channel virtual digital I/O including buttons,
>>> switches, and
>>> LEDs – perfect for logic training applications
>>> * Two input/output digital trigger signals for linking multiple
>>> instruments (3.3V CMOS)
>>> * Single channel voltmeter (AC, DC, ±25V)
>>> * Network analyzer – Bode, Nyquist, Nichols transfer
>>> diagrams of a
>>> circuit. Range: 1Hz to 10MHz
>>> * Spectrum Analyzer – power spectrum and spectral
>>> measurements (noise
>>> floor, SFDR, SNR, THD, etc.)
>>> * Digital Bus Analyzers (SPI, I²C, UART, Parallel)
>>> * Two programmable power supplies (0…+5V , 0…-5V). The maximum
>>> available output current and power depend on the Analog
>>> Discovery 2
>>> powering choice:
>>>
>>> ...250mW max for each supply or 500mW total when powered
>>> through USB
>>>
>>> ...2.1W max for each supply when powered by an auxiliary
>>> supply. 700mA
>>> maximum current for each supply.
>>>
>>> As of March 17th, they have also released a fully-fledged
>>> logic analyser
>>> version, the Digital Discovery for $199 -
>>> http://store.digilentinc.com/digital-discovery-portable-logic-analyzer-and-digital-pattern-generator/
>>> <http://store.digilentinc.com/digital-discovery-portable-logic-analyzer-and-digital-pattern-generator/>
>>>
>>> .
>>> This is an up to 800MHz multi-channel logic analyser &
>>> pattern generator
>>> for peanuts.
>>>
>>>
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