JYE Tech DSO138mini User Manual

Download

Page 1

DSO138mini Oscilloscope DIY Kit

User Manual

Tools you need

Screw driver

Iron (20W)

Solder wire

Multimeter

Flush cutter

Tweezers

Rev. 05

Before you start

Check values & quantities against parts listed

Understand all part polarities and orientations

Prepare a USB cable with USB-micro connector

(Model: 13805K)

Applicable PCB:

Applicable firmware: 113-13810-110 or later

Main: 109-13800-00I Analog: 109-13801-00[H, J]

Notes

Instructions for optional parts (including and

charger

) are not given in this manual. If you have purchased these parts please

refer to their own manuals available at .

Please visit for other documents about schematics,

www.jyetech.com

troubleshooting, firmware upgrade, mechanical, waveform upload, etc.

Items marked with [H] are for analog board ver. H. Items marked with [J] are for analog board ver. J.

BNC probe, enclosure, battery

www.jyetech.com

Step 1

Test and Assembly Main Board

1. Check the main board

Before mounting any parts to the main board

Use an USB cable with USB-Micro plug to power the main board through J7. You should see the scope boots up to a screen

similar to the photo below. D1 (LED) should blink three times during the booting.

Apply power

Check display

2. Pin-headers (female)

Attention

Do not solder any parts to the board if you find problem. Otherwise warranty will be voided. Report to your vender or JYE Tech for any problem found.

1 X 10 pin

1 X 2 pinJ8

1 X 3 pinJ9

Step 2

Assembly Analog Board (follow the order as numbered)

1. Resistors

R1, R13

R3, R15

100KΩ

1.8MΩ

200KΩ

2MΩ:

2. Diode

3. HF-Chokes

Note:

Always meter resistor values before soldering because color bands are easy to mis-read.

Resistors are all 1/8W.

R6, R14, R17

R7, R11

R8, R12

R9, R10, R16

20KΩ

300Ω

180Ω

120Ω

1.1KΩ

Cathode

L1,L2

Zener, 2.0V

100Hμ

4. LED

Solder positive pole (the longer lead) to the square pad

5. Capacitor trimmers

5 - 30pF (green)

5 - 30pF (green)[H]

2 - 6pF (blue)[J]

6. Ceramic Capacitors

0.1F

220pF:

3pF:

1pF [ver. H only]:

120pF [H]

500pF [J]

LED, blue,

dia. 3mm

7. Pin header

2 Pin, 2.54mm,

J1, J6

rightangled

Note:

Do not install J1 if BNC connector is to be used.

8. Electrolytic capacitors

Solder positive pole (the longer lead) to the square pad

C10, C11, C12, C13, C14

100μ /16VF

9. Slide switches

[ H ]

SW1, SW2, SW3 2P3T

[ J ]

SW4

DPDT

10. Pin-headers (male)

11. Test signal ring

1 ) Make a small ring with a lead cut-off.

2 ) Solder the ring to the two holes of J4 (as shown in the photo).

12. Tact Switches

BTN1, BTN2, BTN3, BTN4

13. Jumpers

Short JP2 and JP3with solder (see photo at left). Keep JP4, JP5, JP6 (on the bottom side) open. JP1 has been pre-shorted.

1 X 10 pin

1 X 3 pin

1 X 2 pin

6 X 6 X 9mm

JYETech Ltd.

- www.jyetech.com -

Tech Support: www.jyetech.com/forum

Page 1

Page 2

14. Hook Probes

Put wire through hood cap and sold the wire onto hook terminal as shown. Match wire color with hook color.

Step 3

Test analog board

1. Check voltages and controls

Couple Selection

Couple

Sensitivity

(V/div)

Timebase

[SEN1]:

Sensitivity Selection 1

Horizontal Position

(s/div)

V+

[Analog board ver. H shown]

AV+

AV-

V-

[SEL]: Parameter Selection

Couple switch (set to GND)

VBUS

Power input (USB)

Place negative pen at GND

Display and Controls

[CPL]:

Signal Input

Oscilloscope Mode

Power input

Vertical Position Indicator

JYETech Ltd.

- www.jyetech.com -

References

(*) Input dependent

VBUS V+ AV+ VAVV1 V2

V3 V4

Note:

V2 - V4 could have up to +/- 0.2V variance depending on power supply voltage.

[Analog board

[SEN2]:

Sensitivity Selection 2

ver. H shown]

Trigger State

[+] and [-]:

Parameter Adjustment

Finished look

+5.10V

(*)

> 3.5V

(*)

> 3.5V

(*)

< -3.5V

(*)

< -3.5V

1.05V

2.1 V

-1.05V

Reset (by shorting the two pads)

Trigger Level Indicator

Ext. Trigger In (PB15)

Trigger Level (internal only)

Trigger Source

Trigger Slope

Trigger Mode

[OK]: HOLDRUN/

[H]

Attach the main board to the

analog board. Apply 5V DC power through J7.

Set switch [CPL] to GND, [SEN1] to 1V, and [SEN2] to X5. Check voltages at the points as

shown in the photo. Check slide switches and push-

buttons for correct operation. Calibrate C4 & C6 if everything

is fine (see instructions to the right).

Attention

Power supply voltage must not exceed 8V.

Allowed maximum signal input voltage is 50Vpk (100Vpp) .

Specifications

Max realtime sample rate Analog bandwidth

Sensitivity range

Max input voltage

Input impedance

Resolution

Record length

Timebase range

Trigger modes

Trigger position range

Trigger sources

Ext. trigger thresholds

Ext. trigger input range

Power supply

Current consumption

Dimension

Weight

1MSa/s 0 -- 200KHz

10mV/div - 5V/div

50Vpk (1X probe)

1M ohm/20pF 12 bits

1024 points

500s/Div -- 10us/Div

Auto, Normal, and Single

Center (fixed)

Internal/External

Low: 1.1V, High: 2.2V

0V - 10V(max)

3.5V - 5V DC

< 100mA

85 x 75 x 15 (mm)

50 gram (without probe)

[J]

Calibrating C4 & C6

Insert hook probe to J1. Connect the red hook to the test signal terminal J4 and leave the black hook un-connected.

Set [SEN1] switch to 0.1V and [SEN2] switch to X5. Set [CPL] switch to AC or DC.

Adjust timebase to 0.2ms. You should see waveform similar to that shown in photos below. If traces are not stable adjust trigger level (the pink triangle on right screen border) so as you get a stable display.

Turn C4 (capacitor trimmer) with a small screw driver so that the waveform displays sharp rightangle (photo C).

Set [SEN1] switch to 1V and [SEN2] switch to X1while keep all other settings unchanged. Adjust C6 so that sharp rightangle waveform is displayed.

A – Not enough

B – Too much

Operations

[SEL] button: [+] and [-] button: [OK] button: [CPL] switch:

[SEN1]/[SEN2] :

Select parameter to be adjusted. The selected parameter will be highlighted.

Adjust the parameter selected by [SEL] button.

Freeze waveform refresh (entering HOLD state). Press on it again will de-freeze.

Set couple to DC, AC, or GND. When GND is selected the scope input is disconnected from outside and connected to ground internally (0V input).

Adjust sensitivity. The product of [SEN1] and [SEN2] settings makes the actual sensitivity which is displayed at the screen lower-left corner.

More Operations

Functions Operations

VPos Alignment

Measurements ON/OFF

Save Waveform

Recall Waveform

Default Restore

Center HPos

Center Trigger Level

Send Waveform Data

Toggle Test Signal Amplitude

Calibrate Analog Gain

Tech Support: www.jyetech.com/forum

Move cursor to VPos indicator. Hold down [OK] for 3 seconds. Then follow screen prompts.

Move cursor to timebase. Hold down [OK] button for 3 seconds to turn ON or OFF on-screen measurements including Vmax, Vmin, Vavr, Vpp, Vrms, Freq., Cycle, Pulse width, and Duty cycle.

Press [SEL] & [+] buttons simultaneously. The currently displayed waveform will be saved to EEPROM. The existing data in EEPROM will be over-written.

Press [SEL] & [-] buttons simultaneously. Recalled waveform is always displayed

in Hold state.

Hold down [+] and [-] buttons simultaneously for about 3 seconds.

Move cursor to the top bar. Hold down [OK] button for about 3 seconds. This will move the display window to the center of capture buffer.

Move cursor to trigger level indicator. Hold down [OK] for 3 seconds. This will set the trigger level to the medium value of signal amplitude.

Hold down [SEL] button for 3 seconds will send waveform data in texts via serial port J5. The baudrate is 115200. Data format is 8N1.

Move cursor to trigger slope indicator. Hold down [OK] button for 3 seconds to toggle test signal amplitude between 3.3V and about 0.14V. The amplitude is indicated by to screen top.

Move cursor to trigger source indicator. Hold down [OK] button for 3 seconds to enter analog gain calibration mode. Follow the on-screen instructions.

Leave black hook un-connected

Connect red hook to test signal output

C4C6

C – Good

[Analog board ver. H shown]

Page 2