Spark Logic

DSO138 oscilloscope connection guide

DSO138 oscilloscope DSO138 13803K / 13804K wiring guide with power, signal assignments, and bench checks.

DSO138 13803K / 13804K

7 contacts Current package

JYE Tech · JYE Tech kit connectors for the BNC input, DC supply and test signal.

Power the oscilloscope

Required

Use a regulated 9 V DC adapter with a center-positive 5.5 × 2.1 mm plug and a current rating above 200 mA.

Bench checks

  • Verify the polarity and the unloaded adapter voltage before inserting the plug. The kit accepts 8–12 V DC.
  • Power on with the BNC probe disconnected and set coupling to GND. Confirm that the display starts and shows a steady zero trace.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

Connection scenarios

Align zero and compensate the analog input

Set coupling to GND and use SEL to highlight VPos. Hold OK for about two seconds to align zero. Then connect the red clip of the BNC probe to J2 and leave the black clip free as shown in the manual.

Bench checks

  • Select AC or DC coupling and 0.2 ms/div. Set SEN1 to 0.1 V and SEN2 to ×5. Adjust the trigger level until the waveform is stable, then trim C4 for flat tops and clean corners.
  • Set SEN1 to 1 V and SEN2 to ×1, then trim C6 for the same square-wave shape.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

DSO138 13803K / 13804K wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

J1 BNC input
Viewed into the input socket. The center is the signal.
J10 DC barrel jack
Viewed into the DC jack. The center is positive. J10 is beside the power header on the PCB.
J9 alternate DC header
PCB pin numbers from the schematic. Use one power entry at a time.
J2 test output
One exposed test contact. Both PCB pads of the terminal carry the same signal.
Selected pin details

J2 · TESTSIG

Square-wave output · Outputs

Onboard 1 kHz, 3.3 V square wave.

JYE Tech DN138-01v05, Operation and Probe Calibration on p. 3 and schematic on p. 4.

Electrical limits · Pin in the reference

Models and documents

This map covers original JYE Tech kits 13803K and 13804K. The optional J4 Mini-USB footprint is listed without a user function. Use J10 or J9 for power.

DSO138 13803K / 13804K
JYE Tech kit connectors for the BNC input, DC supply and test signal.