Welcome to our shop! This external multi-function expansion meter is designed specifically for Yaesu FT-857D and FT-897 radios. It features high performance and super stability, allowing you to effectively detect and understand your Yaesu radio and improve your work efficiency. The meter clearly displays the automatic level control voltage, modulation level, standing wave ratio, and supply voltage. It is made with high quality materials and excellent durability, ensuring long-lasting use. Additionally, it is easy to operate, making it convenient for users. The meter weighs 300g and has a size of 6.7*7*6cm. The line length is 37cm and it comes in black color. Package List: - 1 * External S Meter Display Meters for Yaesu FT-857/FT-897 To set up the external header display for FT-857D and FT-897D radios, follow these steps: 1. Press the (FUNC) key to enter the setup menu and enable the extended menu. 2. Rotate the (SELECT) knob to call up the setup menu item No-061 (MTR ARX SEL). 3. Rotate the (DIAL) knob to select the desired external instrument display, such as signal strength, discriminator center meter, battery voltage, etc. 4. Press the (FUNC) button to save the settings and exit the setup menu. For emission display settings, follow these steps: 1. Press the (FUNC) key to enter the setup menu and enable the extended menu. 2. Rotate the (SELECT) knob to call up the setup menu item No-061 (MTR ARX SEL). 3. Rotate the (DIAL) knob to select the desired external instrument display, such as transmit power, automatic level control voltage, modulation level, SWR, etc. 4. Press the (FUNC) button to save the settings and exit the setup menu. To calibrate the meter, follow these steps: 1. Press the (FUNC) key to enter the setup menu and enable the extended menu. 2. Rotate the (SELECT) knob to call up the setup menu item No-060 (MTR ARX SEL). 3. Rotate the (DIAL) knob to select FS. 4. Use a small flathead screwdriver to adjust the calibration adjustment hole at the rear of the meter until the pointer reaches full scale. 5. The calibration is complete! Please note that the meter has been calibrated before delivery, but there may be instances where the static pointer is not zero due to bumps during transit. In such cases, the instrument can be adjusted by using the self-zeroing screws on the mask side. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.