Difference between revisions of "Velleman PCSGU250"
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[[File:VELLEMANN_PCSGU250_FRONT.jpg|thumb|right|Velleman PCSU250]] | [[File:VELLEMANN_PCSGU250_FRONT.jpg|thumb|right|Velleman PCSU250]] | ||
The [http://www.velleman.eu/products/view/?id=377622] is an inexpensive USB-based oscilloscope. It has 2 channels, an analog bandwidth of 12MHz and 25MS/s sampling rate. | The [http://www.velleman.eu/products/view/?id=377622 PCSU250] is an inexpensive USB-based oscilloscope. It has 2 channels, an analog bandwidth of 12MHz and 25MS/s sampling rate. | ||
See [[Velleman PCSU250/Info]] for more details (such as '''lsusb -vvv''' output) about the device. | See [[Velleman PCSU250/Info]] for more details (such as '''lsusb -vvv''' output) about the device. | ||
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File:VELLEMANN_PCSGU250_SIGNAL_GEN.JPG|<small>signal generator or trigger circuit?</small> | File:VELLEMANN_PCSGU250_SIGNAL_GEN.JPG|<small>signal generator or trigger circuit?</small> | ||
File:VELLEMANN_PCSGU250_OUTPUT_STAGE.jpg|<small>output stage</small> | File:VELLEMANN_PCSGU250_OUTPUT_STAGE.jpg|<small>output stage</small> | ||
File:VELLEMANN_PCSGU250_RUSTY_METAL.jpg|<small> | File:VELLEMANN_PCSGU250_RUSTY_METAL.jpg|<small>Chunk of rusty metal for weight</small> | ||
File:VELLEMANN_PCSGU250_FRONT.jpg|<small>output stage</small> | File:VELLEMANN_PCSGU250_FRONT.jpg|<small>output stage</small> | ||
</gallery> | </gallery> |
Revision as of 19:12, 30 July 2013
The PCSU250 is an inexpensive USB-based oscilloscope. It has 2 channels, an analog bandwidth of 12MHz and 25MS/s sampling rate.
See Velleman PCSU250/Info for more details (such as lsusb -vvv output) about the device. Vellemann PCSGU250/USB Control]
Hardware
Control logic
- Xilinx XC3S50 50K-gate FPGA
- 50MHz crystal: 50.000 Y0KE (clock source for the Xilinx FPGA)
- Microchip PIC18LF2450-I/SP 8-bit microcontroller
USB interface
- inluded in the PIC
Analog frontend
- 4 x SIR-S4-105A IZ Goodsky 5V relay (2 per input channel)
- 2 x Texas Instruments OPA2354 op-amps
- 1 x Analog Devices AD9288BST-40 Dual 8-bit 40MSPS A/D converters
Power
- 3 x Texas Instruments TPS766xx voltage regulators (IC19=1V, IC20=2.5V, IC21=3.3V)
Trigger Level
- 74HCT4051D 8-channel analog multiplexer/demultiplexer with 15 resistors, is that a R2R DAC??? I would guess this one is for the trigger level
Signal Generator
- DAC0800LCM 8-Bit Digital-to-Analog Converter Settling Time 0.1 µs, does that mean max. 10Mhz Sample rate?
- TL081C JFET OPAMP
- lm6172 Dual High Speed, Low Power, Low Distortion Voltage Feedback Amplifiers 100Mhz GBW
Photos
Protocol
https://bitbucket.org/abbradar/scope/src http://forum.velleman.eu/viewtopic.php?f=10&t=3586&start=15 https://app.box.com/s/cxybc16r7o5kqb65u6ct