allows the SDR and TRX to use the same antenna at the same time. In receive mode, the SDR is connected to the antenna, while in mit mode, the SDR is disconnected from the antenna and grounded. If a separate receive antenna is used, the SDR is fully protected during mission. The MX-S1 consists of two separate circuit boards: the Audio - which performs the audio path ing and is also responsible for controlling the ANT , and the ANT - which is RF shielded and contains the antenna relay and receive input limiter. During mission, the SDR audio signal is muted and the TRX audio signal is selected. Double fault SDR input protection in case of antenna relay failure. High power input RF limiter for limiting high currents and keeping the SDR input voltage at a safe level. Protection against TRX PTT cable disconnection, protection against power failure, overcurrent protection (with reconfigurable fuse). Recommended to be powered from the 12 V supply used by the ceiver (common ground required). Additional external relays (max. current 200 mA) can be synchronously controlled via the TRX PTT signal, e.g. for PA control, mitter antenna detection, receive antenna ing, station automation. This method avoids RF ground loops when using multiple devices. Frequency DC-60Mhz Maximum power: 100W Insertion loss 0.3DB Operating voltage: 12V (10V-15V) Operating current: Less than100MA SWR: ≤ 1.5 Interface: SL16 Please note: There may be slight color difference or discrepancy in the actual product, which does not affect the use, please don't mind, thank you! Color: As shown Material: Metal Package Contents: 1 x SDR Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The