High frequency signal source, signal source (0.5-470MHz) 1. Specially used for FM walkie-talkie debugging 2. Frequency 0.5MHz-470MHz 3. Output signal strength -70 to -132dBm (other values are invalid) 4. Built-in 800Hz audio modulation (FM mode modulation) (other values are invalid) 5. Use 8-12V DC power supply 6. 7-digit frequency Example: 439.0125MHz displays 4390125 If it is 439.125MHz displays 4391250 Product Description Product Name: High frequency signal source, signal source (0.5-470MHz) The operation method is as follows: F1: cycle selection setting item points to the item, respectively frequency, signal strength, audio modulation frequency F2: Backspace key when input is wrong F3:close, open signal output F4:Turn off, turn on audio signal modulation Number keys: directly input the value of the item Up and down keys: modify the value of the item Notice: It is forbidden to input power, once the input power exceeds 0dbm, the signal source be burned, and the damage caused by the input power is not covered by the . Description of the signal source of the walkie-talkie Source Mode: Frequency (0.5-470M) on the left of the first line, output power (-70 to -132dBm) on the right The left side of the second line is -tone (50.0-280.0Hz arbitrary analog sub-tone and 105 groups of digital sub-tone) The right side is the modulation tone modulation degree (0-3K) (0k is to close Numeric keys: direct input for the cursor pointing item Up and down keys: Step adjustment cursor pointing to the item value F1 key:Cursor pointing to move F2 key:Backspace key F3 key: function key. When the cursor points to the output power, sub-tone, and modulation tone, it is a cycle switch function.when the cursor points to the power output, the function of this key is a cycle switch signal output.F4 key: not used Analog sub-tone setting: directly input 4 digits of sub-audio point, if it is not enough, add "0" in front of the 4 digits Example 88.8Hz input 0, 8, 8, 5, Weight: 0.79697107713 Pounds, Manufacturer: Prterver