Check the listing for details. 20M -9.8GH RF Signal Source Generator Main Unit+TYPE-C Cable+Communication Cable. Condition: New. Listed at 246.98 USD. The amplitude level should be fixedly input as "2-digit integer"! Note: It is necessary to strictly follow the protocol format. The frequency values should be input as "5-digit integer + 3-digit decimal", with the unit fixed as "MHz"; the symbol value should be input as "3-digit integer"!