1. Įvadas ir pabaigaview
The FNIRSI DPOS350P is a versatile 4-in-1 portable tablet instrument designed for various electronic testing and measurement applications. It integrates a 350 MHz bandwidth oscilloscope, a 200 KHz - 350 MHz spectrum analyzer, a 100 Hz - 50 MHz frequency response analyzer, and a 0 - 50 MHz DDS signal generator. This manual provides essential information for the safe and effective operation of your device.

1 pav. Baigtaview of the FNIRSI DPOS350P's integrated functions.
2. Sąranka
2.1 Pradinis įkrovimas
Before first use, fully charge the device's integrated 8000 mAh lithium polymer battery using the provided USB-C cable and a compatible power adapter. The charging indicator will show the charging status.
2.2 Maitinimo įjungimas/išjungimas
Press and hold the power button located on the side of the device to turn it on or off. The device features an automatic power-off function, which can be configured in the system settings, to conserve battery life.

Figure 2: The FNIRSI DPOS350P highlighting its 7-inch IPS touchscreen and 8000mAh battery.
3. Veikimo režimai
The FNIRSI DPOS350P offers four primary operating modes, accessible via the touchscreen interface.
3.1 Osciloskopo funkcija
This mode provides a 2-channel digital oscilloscope with a 350 MHz bandwidth and a 1 GSa/s real-time sampling rate. Key features include:
- Pralaidumas: 350 MHz
- Sample Įvertinkite: 1 GSa/s
- Atminties gylis: 47 Kpts
- Rezoliucija: 8-16 bit, adjustable to improve signal clarity and detail.
- Waveform Update Rate: 50,000 XNUMX wfms/s
- Kanalai: 2
- Ekranas: 7-inch IPS touchscreen with digital phosphors.
- Režimai: X-Y mode for phase comparison.
- Jautrumas: Ultra-sensitive 2 mV/div.
- Išmatavimai: 12 automatic measurements and cursor functions.

Figure 3: Comparison of 8-bit and 16-bit resolution on the oscilloscope, demonstrating enhanced detail.
3.2 Spectrum Analyzer Function
The spectrum analyzer performs FFT-based analysis over a frequency range of 200 kHz to 350 MHz. It is suitable for EMI checks and signal integrity analysis.
- Dažnių diapazonas: 200 kHz - 350 MHz
- FFT Length: Configurable from 400 kHz to 320 kHz.
- Savybės: Harmonic markers, cursor readings, and real-time 2D/3D waterfall display.

Figure 4: Spectrum Analyzer interface with 2D and 3D waterfall displays for detailed frequency analysis.
3.3 Frequency Response Analyzer Function
This function allows for Bode plot analysis, ideal for testing the stability of loops, optimizing analog filters, and measuring gain/phase/frequency characteristics.
- Dažnių diapazonas: 100 Hz - 50 MHz
- Ampšviesa: 0–5 Vpp
- Poslinkis: +2.5 V iki -2.5 V
- Dažnių skaičius: 20 iki 500
- Išmatavimai: Gain, phase, and frequency.

Figure 5: Frequency Response Analyzer displaying a Bode plot for circuit analysis.
3.4 DDS Signal Generator Function
The built-in DDS signal generator can output various waveforms for testing and calibration purposes.
- Bangos formos: 14 standard waveforms and support for 500 custom clipped waveforms.
- Dažnių diapazonas: 0–50 MHz
- Rezoliucija: 1 Hz
- Ampšviesa: 0–5 Vpp
- Poslinkis: Nuo -2.5 V iki +2.5 V
- Darbo ciklas: Reguliuojamas nuo 0.1 % iki 99.9 %.
4. Smart Features and Portability
The DPOS350P is designed for both laboratory and field use, incorporating several intelligent features:
- Bangos formos saugojimas: Stores up to 500 waveforms.
- Ekrano nuotraukos: Captures up to 90 screenshots.
- FFT ekranas: Integrated Fast Fourier Transform display.
- Bandwidth Limiter: Hardware bandwidth limiter at 150 M/20 M.
- Automatinis išjungimas: Configurable automatic shutdown to save battery.
- Baterija: 8000 mAh rechargeable battery for extended portable use.
- Įkrovimas: USB-C įkrovimo prievadas.
- Duomenų eksportavimas: Supports USB data export and software updates.
5. Priežiūra
5.1 Bendroji priežiūra
Keep the device clean and dry. Avoid exposure to extreme temperatures, humidity, or direct sunlight. Use a soft, dry cloth for cleaning the exterior. Do not use abrasive cleaners or solvents.
5.2 Akumuliatoriaus priežiūra
Norėdami pailginti akumuliatoriaus veikimo laiką, venkite dažnai visiškai jį iškrauti. Jei įrenginį ilgesnį laiką laikysite, įsitikinkite, kad akumuliatorius įkrautas maždaug iki 50–70 %, ir įkraukite jį kas kelis mėnesius.
5.3 Programinės įrangos naujiniai
Periodiškai tikrinkite gamintojo website for available software updates to ensure optimal performance and access to new features. Updates can typically be performed via the USB data export port.
6. Problemų sprendimas
6.1 Įrenginys neįsijungia
- Ensure the battery is sufficiently charged. Connect the device to a power source using the USB-C cable and allow it to charge for at least 30 minutes before attempting to power on again.
- Įsitikinkite, kad maitinimo mygtukas yra tinkamai paspaustas ir laikomas nuspaustas.
6.2 Ekrano problemos
- Jei ekranas nereaguoja, pabandykite paleisti įrenginį iš naujo.
- Adjust display brightness in the system settings.
6.3 Inaccurate Measurements
- Ensure probes are correctly connected and calibrated.
- Check measurement settings (e.g., voltage range, time base, resolution).
- Perform a self-calibration if available in the system menu.
For persistent issues, refer to the official FNIRSI support resources.
7. Specifikacijos
| Gamintojas | FNIRSI |
| Dalies numeris | OS000001 |
| Prekės svoris | 1.59 kilogramo |
| Pakuotės matmenys | 24.7 x 18.7 x 10.5 cm |
| Baterijos | 1 ličio polimero baterija (pridedama) |
| Osciloskopo juostos plotis | 350 MHz |
| Oscilloskopas Sample Įvertinkite | 1 GSa/s |
| Osciloskopo kanalai | 2 |
| Spectrum Analyzer Range | 200 kHz - 350 MHz |
| Dažnio atsako analizatoriaus diapazonas | 100 Hz - 50 MHz |
| DDS Signal Generator Range | 0–50 MHz |
| Ekranas | 7 colio IPS jutiklinis ekranas |
8. Garantija ir palaikymas
The FNIRSI DPOS350P comes with a standard manufacturer's warranty. For detailed warranty terms, technical support, or service inquiries, please refer to the official FNIRSI websvetainėje arba susisiekite su įgaliotuoju pardavėju. Išsaugokite pirkimo kvitą kaip pirkimo įrodymą.