1. Introducció
The PNI SWR-300 is a compact and reliable SWR and power meter designed for measuring the Standing Wave Ratio (SWR) of radio antennas and the output power of CB radio stations. This manual provides essential information for the correct installation, operation, and maintenance of your device, ensuring optimal performance within the 26-30 MHz frequency range.
2. Informació de seguretat
- Always ensure all cable connections are secure and correct before operating the device.
- No exposeu el dispositiu a la humitat, la pluja ni a temperatures extremes.
- Eviteu deixar caure o sotmetre el dispositiu a forts impactes.
- No intenteu obrir la casing or perform repairs yourself. Refer to qualified personnel for service.
- Mantingueu el dispositiu allunyat de camps electromagnètics forts.
3. Contingut del paquet
- PNI SWR-300 SWR & Power Meter Unit
- Manual d'usuari
4. Configuració i connexions
Follow these steps to correctly connect your PNI SWR-300 meter:
- Connectar l'antena: Connect your CB radio antenna to the 'ANT' (Antenna) SO-239 connector located on the rear panel of the SWR meter.
- Connectar el transceptor: Connect your CB radio transceiver (radio) to the 'TRANS' (Transceiver) SO-239 connector located on the rear panel of the SWR meter.
- Connexions segures: Ensure all coaxial cable connections are tight and secure to prevent signal loss and inaccurate readings.
Figura 4.1: posterior view of PNI SWR-300 showing ANT and TRANS connectors.
5. Instruccions de funcionament
The PNI SWR-300 features an analog meter, power range switches, and a calibration knob. Familiarize yourself with these controls:
Figura 5.1: Frontal view of PNI SWR-300 controls.
5.1. Measuring SWR (Standing Wave Ratio)
To measure your antenna's SWR, follow these steps:
- Power Range Selection: Set the power range switch (labeled '10W FWD' / '100W REF') to the appropriate range for your radio's output power. Use '10W FWD' for lower power radios (up to 10W) and '100W REF' for higher power radios (up to 100W).
- Selecció del mode: Set the 'SWR / PWR' switch to 'SWR'.
- Transmetre: Press and hold your radio's transmit (PTT) button to transmit a continuous carrier signal.
- Calibra: While transmitting, slowly rotate the 'CAL' knob until the meter needle aligns precisely with the 'SET' mark on the meter scale.
- Read SWR: Release the transmit button. The meter now displays the SWR value. A lower SWR (ideally between 1.0 and 1.5) indicates a better-tuned antenna.
- Ajustar l'antena: If the SWR is high, adjust your antenna according to its specific instructions to achieve the lowest possible SWR. Repeat the calibration and measurement process after each adjustment.
5.2. Measuring Output Power
To measure your radio's output power, follow these steps:
- Power Range Selection: Set the power range switch ('10W FWD' / '100W REF') to the appropriate range for your radio's expected output power.
- Selecció del mode: Set the 'SWR / PWR' switch to 'PWR'.
- Transmetre: Press and hold your radio's transmit (PTT) button to transmit a continuous carrier signal.
- Read Power: The meter will directly display your radio's output power in Watts on the 'WATT' scale.
6. Cura i Manteniment
- Neteja: Feu servir un drap suau i sec per netejar l'exterior del dispositiu. No utilitzeu productes de neteja abrasius ni dissolvents.
- Emmagatzematge: Store the SWR meter in a dry, dust-free environment when not in use.
- Manipulació: Handle the device with care to avoid damage to the internal components or the meter needle.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| No meter reading | Loose or incorrect cable connections. Radio not transmitting. | Check all coaxial cable connections. Ensure the radio is powered on and transmitting. |
| High SWR reading | Poorly tuned antenna. Damaged antenna or cable. | Adjust antenna for optimal tuning. Inspect antenna and cable for physical damage or shorts. |
| Lectures inexactes | Incorrect power range selected. Meter not calibrated for SWR. | Ensure the correct '10W FWD' or '100W REF' range is selected. Always calibrate the meter to 'SET' before reading SWR. |
8. Especificacions tècniques
- Model: PNI-SWR300
- Interval de freqüència: 26-30 MHz (for SWR and Power measurement)
- Power Measurement Ranges: 0.5-10 W / 10-100 W
- Precisió SWR: ± 5%
- Precisió de potència: ± 10%
- Impedància: 50 ohms
- Connectors: SO-239
- Dimensions del producte (L x A x A): 8.5 x 7.6 x 5.8 cm
- Pes: 216 grams
- Compliant Specifications: CE
- Fabricant: BOTIGA EN LÍNIA SRL
- País d'origen: Xina
9. Garantia i Suport
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your retailer. You may also visit the official PNI weblloc per obtenir més ajuda.
