Difference between revisions of "Hantek 1008C"

**Hantek 1008C**
Status	planned
Channels	8
Samplerate	2.4MS/s (see notes)
Samplerate (state)	?
Triggers	edge on either channel
Min/max voltage	±500mV / ±20V
Memory	4K samples, 12bits each
Compression	?
Website	hantek.com

Revision as of 18:54, 12 June 2020

The Hantek 1008C is a USB-based 8-channel oscilloscope (sampling resolution: 12bits on each channel), with 8 channel digital pattern generator.

See Hantek 1008C/Info for some more details (such as lsusb -vvv output) on the device.

Hardware

CPU: ST Microelectronics STM32F103C6T6A
Low-dropout voltage regulator: Advanced Monolithic Systems AMS1117-3.3
8-channel analog multiplexer/demultiplexer: NXP Semiconductor 74HCT4051D (1 per analog channel)
Octal 3-state buffer: Fairchild Semiconductor MM74HC244SJ (in the path of digital outputs)
8-bit shift register with 3-state output: 74HC595 (3 total)
Dual opamp: in MSOP-8 package, Texas Instruments unknown model (chip markings "TI 25 AVG") (1 per analog channel)

1M impedance, DC coupling

ships with one high pressure ignition probe (inductive)

more recent board revision ("Mini DSO V1.00.14 // 2018-11")

STM32F103C8T6
AMS1117-3.3 LDO plus (not identified) SMPS U427, no barrel jack, only USB-B
8x NXP 74HC4051D, 8x TI 86 AVG (per analog channel)
1x TI HC244 (for digital outputs)
1x TI 86 AVG (near IDC pin header, A0/A1 signals)
3x HC595

Photos

V1.00.4 2012-03

Device, top
Device, bottom
Package contents
Device, front
Device, back
Front inputs
Void if removed sticker
Top cover
Top cover removed
PCB, top
PCB, bottom
PCB revision, v1.00.4
Main CPU, STM32F1
74HC4051D
AMS1117 3.3V LDO
HC224SJ
HC595
TI25AVG
Analog input circuit

V1.00.12 2018-11

There is another version ("Mini DSO V1.00.12 // 2018-11") which differs from the images above: Comes in a pouch, ships with eight BNC to alligator cables, lacks a barrel jack, LED position has moved, rubber bumpers around case edges, no silkscreen labels on the case, signal names "engraved", teardown yet to be done. See the (updated) vendor's product page to get an idea.

PCB tot
PCB top, channels 1-3
PCB top, channels 3-6
PCB top, channels 7-8
PCB top, regulation, MCU, pattern generator
PCB bottom
case walls, connector labels
case walls, generator pinout

Protocol

Need to continuously send commands to the OUT Endpoint, and for each command receive the result from the IN Endpoint (both Endpoints can transfer max 64 bytes). The device got logically disconnected automatically if not receive any command after 7 seconds.

List of commands (incomplete)

A0 -> set number of channel enabled (ie. A0 02: 2 channels are enabled)
AA -> set which channel to enable (ie. AA 01 01 00 00 00 00 00 00 enable channel 1 and 2)
A2 -> set voltage level for each channel (ie. A2 03 03 03 03 03 03 03 03 apply +-20V range on each channel)
A3 -> set sampling rate (ie. A3 00 set highest sampling rate)
AC -> set sampling rate (ie. AC 07 D0 00 03 42 00 03 42 set highest sampling rate for 2 channels enabled = 1.2MS/s)
AB -> set trigger level (ie. AB 08 00)
C1 -> set trigger source and slope (ie. C1 00 00 for Channel 1, rising slope, C1 01 01 for Channel 2, falling slope)
F3 -> hardware ping (required to send regularly also when acquisition is stoped, otherwise the hardware disconnect)

Sample of initialization cycle

B0
F3
B901BF040000
B700
BB0800
B5
B6
E5
F7
F8
FA
F5
A008
AA0101010101010101
A311
C10000
A70000
AC01F40009C50009C5

Start of waiting cycle for data to be ready into the buffers

F3
A2 01 01 01 01 01 01 01 01
A4 01
C0
C2
A5 5A
A5 5A

Buffers Reading Cycle

C6 02 (return Buffer 1 size)
A6 02 (acquire 64 bytes, 32 samples of 12 bits each, repeated 60 times get 2000 samples)
C6 03 (return Buffer 2 size)
A6 03 (acquire 64 bytes, 32 samples of 12 bits each, repeated 60 times get 2000 samples)

Notes

Sample rate: maximum measured 2.4MS/s if just 1 channel is enabled. Drop down to 1.2MS/s if enable 2 channels.
Acquisition: on each scan acquire 4000 bytes (2000 samples) from 2 buffers (2000 samples each buffer)
Voltage Selector: the most reliable voltage selection is +/-20V, lower hardware voltages present strong non-linearity which make useless the full ADC range of the device (for example +/-500mV range is linear just in the range +500mV -> -80mV.
Zero offset on ADC is strongly temperature dependent. It drops fast after the device is turned on (even around 50mV on a scale of +-20V). It is suggested to perform the Zero offset calibration and to use this instrument after few minutes that is on, when the temperature stabilize.

Resources

Decode .DRC data format
giwig hantek1008C and mfg hantek1008py github repositories, Apache licensed Python code (somehow related to or derived from each other?)

@@ Line 70: / Line 70: @@
 <gallery>
+File:Hantek-1008c-pcb-top.png|<small>PCB tot</small>
 File:Hantek-1008c-pcb-ch123.png|<small>PCB top, channels 1-3</small>
 File:Hantek-1008c-pcb-ch3456.png|<small>PCB top, channels 3-6</small>

Difference between revisions of "Hantek 1008C"

Revision as of 18:54, 12 June 2020

Contents

Hardware