Micsig SigOFIT MOIP01P SigOFIT MOIP01P User manual

SigOFITTM Optical-fiber Isolated Probe
Quick Guide
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SigOFIT™Probe Quick Guide
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WARNING :
*DO NOT block the heat dissipation port on the back of Optical-Electrical converter,
otherwise the probe may be overheated and damaged.
*DO NOT excessively bend the fiber cable. Avoid tight radius (＜8cm) bends, crushing,
crimping, twisting, pulling or otherwise stressing the cable.

SigOFIT™Probe Quick Guide
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Main Steps:
1. Connect the Optical-Electrical (O-E) converter to oscilloscope (Figure 1);
Figure. 1
2. Set the oscilloscope input impedance to 50Ω, set corresponding attenuation
ratio and delay time on the oscilloscope;
3. Connect attenuating tip to the Electrical–Optical (E-O) converter (Figure 2);
Figure. 2
O-E Converter

SigOFIT™Probe Quick Guide
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4. Power the SigOFIT probe by connecting USB-C cable to O-E Converter
using standard charger (localized) (Figure 3);
Figure. 3
5. Solder the MCX connector to the test board:
1) When testing Vgs signal, the signal pin (in the middle) of the MCX female
connector must be connected to the G-end of the MOSFET;
2) Solder the MCX connector directly to the test point, try NOT to use
extension lead, it may bring unsatisfactory test results.
3) For easy soldering, suggest to cut three of the four ground pins around
the base (Figure 4), just keep one.
Figure 4.
①Signal Pin
②Cut any 3 ground pins
③Solder MCX to target
④Plug in probe tip

Quick Guide
6. Plug in the attenuating tip to MCX female socket, when hearing a "click",
it means that the connection is successful.
7. Power ON the test board;
8. Adjust the oscilloscope settings and proceed normal test;
9. Suggest to press Cali. button to get better results before get final readings,
Calibration completed in 1 second, no need to disconnect the circuit.
Over-voltage Warning:
When hearing a rapid "DiDiDiDi.." buzzer sound, it means the input voltage is out of range,
please select a suitable attenuating tip.
Over-heating Warning:
When hearing a “DiDi" sound every 2 seconds, it means the temperature of the Optical-
Electrical (O-E) converter is overheated, please check whether the dissipation port is blocked.
Button Descriptions ：
Figure 5.
①Cali.: Press to re-zero or calibrate in only 1 second during test, no need to wait
* Always press Cali. button to get better results before get final test readings.
②“△” / “▽”：Press to adjust offset position manually (normally not required).
* Please refer to User Manual or contact Micsig for more information.
Email: [e-mail] Tel: [phone]