1. Introducció
The Surecom SW-102 is a compact and versatile digital VHF/UHF antenna power and SWR meter designed for radio enthusiasts and professionals. It provides direct digital readout of VSWR, forward power, and reflected power without the need for calibration. Its low insertion loss allows for permanent connection within your setup. The device also features a built-in frequency counter and displays comprehensive information including frequency, power, SWR, forward power (FW), reflected power (RW), and battery voltage.
2. Informació de seguretat
- No exposeu el dispositiu a temperatures extremes, humitat o llum solar directa.
- Eviteu deixar caure el dispositiu ni sotmetre'l a impactes forts.
- No intenteu desmuntar ni modificar el dispositiu. Això anul·larà la garantia i pot causar danys.
- Use only the specified charger (5V micro USB) to prevent damage to the battery and device.
- Ensure proper connection of all cables and adapters before operation to prevent damage to the meter or connected equipment.
- This device is designed for analog radio systems only and is not compatible with DMR radios.
3. Contingut del paquet
En obrir el paquet, comproveu que tots els elements que s'enumeren a continuació hi són presents i que es troben en bon estat:
- 1x SURECOM SW-102 Meter
- 1x Charger Cable (Micro USB)
- 1x Users Manual
- SL16 to SMA-F Connector (included)
- SL16 to SMA-M Connector (included)

4. Producte acabatview
4.1. Característiques clau
- Direct digital readout of VSWR, Forward Power, and Reflected Power.
- No cal calibratge.
- Maximum measurable power range up to 120W.
- Low insertion loss (<0.15dB VHF, <0.25dB UHF) allows permanent connection.
- Built-in Frequency Counter.
- All-function display: Frequency, Power, SWR, FW, RW, Battery voltage.
- Compact and handheld size with large LCD display.
4.2. Components i controls



The SW-102 features an N-J Interface for connections. Optional accessories such as SL16 to SMA and SL16 to BNC adapters are available to ensure compatibility with various radio and antenna connectors.

5. Configuració
5.1. Connexió del mesurador
To connect the Surecom SW-102, connect the output of your transceiver to the "TX" port on the meter. Then, connect your antenna or dummy load to the "ANT" port. Ensure proper adapters or cables are used if your device has different connector types. The device ships with SL16 to SMA-F and SL16 to SMA-M connectors for common applications.
Watch the video below for a visual guide on connecting the SW-102 to your radio and antenna:
Video 5.1: Demonstration of unboxing, physical overview, and connecting the Surecom SW-102 to a radio and antenna for SWR measurement.
5.2. Encès
To power on the SW-102, press and hold the Botó vermell for 2 seconds. To power off, press and hold the Botó vermell de nou durant 2 segons.
6. Instruccions de funcionament
6.1. Prendre Mides
Once connected and powered on, the SW-102 will display real-time measurements. To measure SWR and power, ensure the meter is in a vertical position and avoid touching the antenna during measurement. Press the PTT (Push-To-Talk) button on your radio to transmit, and the meter will display the VSWR, transmit power, and other relevant data.
El Voltage Standing Wave Ratio (VSWR) is an indication of the amount of mismatch between an antenna and the feed line connecting to it. The range of values for VSWR is from 1 to ∞. A VSWR value under 2 is considered suitable for most antenna applications. The antenna can be described as having a good match. So when someone says that the antenna is poorly matched, very often it means that the VSWR value exceeds 2 for a frequency of interest.
Video 6.1: Demonstration of taking SWR measurements with the Surecom SW-102, including proper positioning and interpreting the display.
6.2. Introducció a la pantalla
The LCD display provides comprehensive information at a glance. Key indicators include:
- Estat de la bateria
- Temps de treball
- Potència de transmissió (W)
- Freqüència de transmissió (MHz)
- VSWR (voltage Relació d'ona estacionària)
- Forward Power (FW)
- Reflected Power (RW)
Video 6.2: Detailed introduction to the Surecom SW-102's display, explaining each parameter and its significance.
6.3. Function Memory Save
To save function memory settings:
- Premeu el botó MENU (Blue button).
- Premeu F1 (Red button) to select a function (1-6).
- Ajusta els valors utilitzant el Blue button (-) i Yellow button (+).
- Premeu el botó Botó vermell durant 2 segons per confirmar.
- Premeu el botó Botó blau to SAVE and EXIT.
7. Manteniment
7.1. Carregant la bateria
The SW-102 is equipped with a 3.7V Li-ion rechargeable battery (14500 type). To charge the device, connect the provided USB charger cable to the micro USB port on the side of the meter and plug the other end into a 5V (0.5-1A) USB power source.

Video 7.1: Instructions on how to charge the Surecom SW-102 using the provided USB cable.
7.2. Funcions d'estalvi d'energia
- El dispositiu presenta una Apagat automàtic function, configurable from 1 to 9 minutes.
- El Llum de fons also has an AUTO OFF feature, configurable from 1 to 9 minutes, to conserve battery life.
8. Solució De Problemes
- If the device does not power on, ensure the battery is charged.
- If readings are inconsistent, check all cable connections for tightness and proper adapter usage.
- Ensure the SW-102 is used with analog radios only. Ho és not compatible with DMR radios.
- For significant discrepancies in SWR readings, verify the antenna's condition and proper installation.
9. Especificacions
| Característica | Especificació |
|---|---|
| Interval de freqüència | 100 - 520MHz |
| Measurable Power Range | 0 - 120W |
| Potència màxima d'entrada | 120W |
| Precisió | +/- 5% |
| Interval VSWR | 1.00 ~ 19.9 |
| Impedància | 50Ω |
| Insertion Loss (VHF) | <0.15dB |
| Insertion Loss (UHF) | <0.25dB |
| Temperatura de funcionament | 0 ℃ ~ 60 ℃ |
| Input Frequency Counter | Sí |
| Voltage Visualització | Sí |
| Tipus de bateria | 3.7V Li-ion Rechargeable Battery (14500) |
| Apagat automàtic | 1-9 minutes (configurable) |
| Entrada del carregador | 5 V (micro USB) |
| Apagat automàtic de la llum de fons | 1-9 minutes (configurable) |
| Interface (In and Out) | N (SL16) |
| Mida | 66*68*37 (mm) |
| Pes | 220 g |
| Pes de l'article | 13.4 unces |
| Dimensions del paquet | 7.76 x 5.43 x 1.81 polzades |
10. Garantia i Suport
Specific warranty information and detailed support contacts are not provided in this manual. Please refer to the product packaging or the manufacturer's official website for warranty details and customer support options.