1. Giới thiệu
This manual provides detailed instructions for the operation and maintenance of your Surecom SW-33 Mark II Mini Digital VHF UHF Two-Way Radio Handheld Power & SWR Meter. This device is designed to accurately measure the forward power, reverse power, and Standing Wave Ratio (SWR) of your VHF and UHF radio systems. Proper use ensures optimal performance and longevity of your equipment.
2. Nội dung gói hàng
Vui lòng xác minh rằng tất cả các mục được liệt kê dưới đây đều có trong gói hàng của bạn:
- 1x Surecom SW-33 Mark II Digital Power & SWR Meter
- 1x SMA Dummy Load
- 1x Cáp sạc USB
- 1 cuốn hướng dẫn sử dụng tiếng Anh
- Various SMA adapters for compatibility

Hình 2.1: Một hình ảnh hoàn chỉnh view trong số tất cả các mặt hàng có trong gói sản phẩm.
3. Sản phẩm hếtview
The Surecom SW-33 Mark II is a compact and robust device designed for ease of use. It features a clear digital display and intuitive controls.
3.1 Các thành phần vật lý
- Top Connector: Used for connecting antennas or dummy loads.
- Đầu nối dưới cùng: Used for connecting to your radio device.
- Nút nguồn: Located on the front, used to turn the device on/off and cycle through display modes.
- Cổng Micro-USB: Located on the top, used for charging the internal battery.
- Đèn báo LED: Next to the Micro-USB port, indicates charging status (red for charging, green for fully charged).
- Màn hình kỹ thuật số: Shows SWR, Forward Power (FW), and Reverse Power (RW) values.

Figure 3.1: Detailed diagram highlighting the main components and connection points of the SW-33 Mark II.

Figure 3.2: An illustration of the meter's display, indicating how power and SWR values are presented.
3.2 Initial Power-On Display
Upon startup, the meter's digital display will show three sets of values: SWR, Forward Power (FW), and Reverse Power (RW). You can cycle through these displays by briefly pressing the power button.
4. Thiết lập
4.1 Sạc thiết bị
- Locate the Micro-USB charging port on the top of the meter.
- Connect the provided USB charge cable to the meter and a suitable 5V USB power source.
- The LED indicator next to the port will illuminate red while charging.
- Đèn LED sẽ chuyển sang màu xanh khi pin được sạc đầy.

Figure 4.1: The meter being charged via its convenient Micro USB port.
4.2 Bật / Tắt nguồn
To power on the device, press and hold the power button for a few seconds until the display illuminates. To power off, press and hold the power button again until the display turns off.
5. Operating Instructions: Power Measurement
Follow these steps to measure the RF power output of your radio device:
- Ensure the meter is adequately charged.
- Connect your radio device to the bottom connector of the SW-33 Mark II. Use appropriate adapters if necessary (included in the package).
- Connect a suitable dummy load to the top connector of the SW-33 Mark II. Ensure the dummy load can handle the maximum power output of your radio.
- Power on the SW-33 Mark II. Press the power button until the indicator light is at the top left, displaying FW (Forward Power) values.
- Hold down the Push-To-Talk (PTT) button on your radio for a few seconds.
- Observe the FW value on the meter's display. This indicates the forward power output of your radio.

Figure 5.1: Visual guide demonstrating the correct setup for measuring the transmit power of a two-way radio.
Video 5.1: Demonstration of the SW-33 Plus 100W 125-525 MHz Power & SWR Meter, showcasing its features and operation for power and SWR measurements.
6. Operating Instructions: SWR Measurement
Follow these steps to measure the SWR of your antenna:
- Ensure the meter is adequately charged.
- Connect your radio device to the bottom connector of the SW-33 Mark II. Use appropriate adapters if necessary.
- Connect the antenna you wish to test to the top connector of the SW-33 Mark II. Ensure the antenna is positioned vertically and there are no obstructions nearby.
- Power on the SW-33 Mark II. Press the power button until the indicator light is at the middle left, displaying SWR values.
- It is recommended to test with your radio device set to high power for more accurate results.
- Hold the meter steadily and hold down the Push-To-Talk (PTT) button on your radio for a few seconds.
- Observe the SWR value on the meter's display. An SWR value closer to 1.0 indicates better antenna performance and a good match.

Figure 6.1: Visual guide demonstrating the correct setup for measuring the Standing Wave Ratio (SWR) of an antenna.
Video 6.1: A detailed guide on how to use the Surecom SW-33 meter for both power and SWR measurements with a two-way radio.
7. Thông số kỹ thuật
| Kích thước sản phẩm | 7.28 x 1.77 x 4.8 inch |
| Trọng lượng sản phẩm | 8.1 ounce |
| Số hiệu mẫu sản phẩm | msc-030048 |
| Pin | Cần có 1 pin Lithium Ion (đã bao gồm) |
| Tính năng đặc biệt | UHF, VHF, Digital Readout |
| Màu sắc | Đen |
| Nhà sản xuất | Surecom |
| Dải tần số | 125-525MHz |
| Công suất tối đa | 100W |
8. Bảo trì
- Vệ sinh: Use a soft, dry cloth to clean the exterior of the device. Do not use harsh chemicals or abrasive cleaners.
- Kho: Bảo quản máy đo ở nơi khô ráo, thoáng mát, tránh ánh nắng trực tiếp và nhiệt độ cao.
- Chăm sóc pin: For optimal battery life, avoid fully discharging the battery frequently. Recharge the device regularly, especially if it will not be used for an extended period.
- Đầu nối: Keep connectors clean and free from dust or debris to ensure reliable connections.
KHAI THÁC. Xử lý sự cố
| Vấn đề | Nguyên nhân có thể | Giải pháp |
|---|---|---|
| Thiết bị không bật nguồn | Pin yếu; Nút nguồn không được nhấn đúng cách | Charge the device; Press and hold the power button for a few seconds |
| Inaccurate SWR/Power readings | Loose connections; Incorrect adapter usage; Antenna not tuned; Radio power setting too low | Ensure all connections are secure; Use correct adapters; Adjust antenna for optimal SWR; Set radio to high power for testing |
| Đèn LED sạc không sáng | Faulty USB cable/power source; Device already fully charged | Try a different USB cable or power source; Check if the LED is green (fully charged) |
10. Bảo hành và Hỗ trợ
Để biết thông tin bảo hành hoặc hỗ trợ kỹ thuật, vui lòng tham khảo tài liệu được cung cấp kèm theo sản phẩm hoặc liên hệ trực tiếp với người bán. Vui lòng giữ lại hóa đơn mua hàng để phục vụ cho các yêu cầu bảo hành.