Features 1、APPLICABLE MODEL: This standing wave ratio meter is suitable for Yaesu FT857 FT897 car radio models, which has good compatibility. 2、MULTIPLE DISPLAY: The dial can clearly display the automatic level control voltage, modulation level, standing wave ratio, and power supply voltage. 3、SIMPLE READING: Transmit power and standing wave ratio can be read directly from the meter without requiring complex calibration procedure. 4、PORTABLE DESIGN: This SWR meter has a compact size, designed for car radio users or amateur radio enthusiasts with insufficient indoor space. 5、EASY CONNECTION: Low insertion loss (0.3dB or less) structure, which can be connected to the motherboard for a long time, convenient and practical. Specification Item Type: SWR Meter Material: Stainless Steel Applicable model: For Yaesu FT857 FT897 Receive Display Settings: 1. Press and hold the FUNC key to enter the setup menu and enable the extended menu. 2. Rotate SELECT to call up the setting menu item No‑060 [MTR ARX SEL]. 3. Rotate DIAL to select the display content of the external instrument: SIG: Display input signal strength CTR: Discriminator Center Meter VLT: Display battery voltage N/A: Blank FS: Calibrate the external instrument by outputting a standard signal with a full scale of 1mA on the instrument latch OFF: Turn off the instrument. 4. Press and hold the FUNC key to save the settings and exit the setup menu. Emission Display Settings: 1. Press and hold the FUNC key to enter the setup menu and enable the extended menu. 2. Rotate SELECT to call up the setting menu item No‑061 [MTR ATX SEL]. 3. Rotate DIAL to select the display content of the external instrument: PWR: Display transmit power ALC: Display automatic level control voltage MOD: Display modulation level SWR: Display standing wave ratio VLT: Display power supply voltage N/A: Blank OFF: Turn off the instrument. The meter has been calibrated (if calibration is required), and the calibration method is as follows 1. Press and hold the FUNC key to enter the setup menu and enable the extended menu. 2. Rotate SELECT to call up the setting menu item No‑060 [MTR ARX SEL]. 3. Rotate DIAL to select FS. 4. Use a small slotted screwdriver to adjust the calibration adjustment hole at the rear so that the pointer on the meter head points to the full scale. 5. Calibration completed. If you cannot find menus 60 and 61, the radio station has hidden these two menus. Press and hold the F key to open the menu settings, set the No.1 menu to ON, and press the F key to exit saving to open the hidden menu. Package List 1 x SWR Meter