Locate the parameter. Increment the value slowly while speaking into the microphone.
The default value hovers around 86 . Adjusting this modifies internal receiver gain tracking to quiet down a noisy front end when a real RF signal is absent. 2. Audio & Modulation Maximization
Since you requested a "full paper" style breakdown regarding the updated service menu for the (and its variants like the CRT SS 7900 or Maverick MC-7900), I have compiled a comprehensive technical guide below.
Connect your radio to a 50-ohm dummy load. Enter the service menu and step through every single code. Write down every parameter name and its corresponding numerical value on a sheet of paper. Step 2: Adjusting AM Modulation Swing If you receive complaints of quiet audio on AM:
The AnyTone AT-5555N II is a popular 10-meter radio known for its robust performance, extensive features, and "export" capability. While the user manual covers basic operations, the radio hides a powerful designed for technicians to align, calibrate, and tune the radio's performance . anytone at5555n ii service menu updated
What (like a dummy load, power meter, or signal generator) do you have available?
Standard manufacturer warranties do not cover damage caused by unauthorized service menu calibration.
: Connect the radio to a dummy load or a tuned antenna to prevent damage during testing.
If the radio is slightly off-frequency, use the loC (Local Oscillator) setting, as suggested in technical forums. Locate the parameter
: Ensure the radio is connected to a dummy load or an antenna to prevent damage.
"My AM carrier is too high (10 watts), but the radio is set to low power." Solution: Go to P-07 (High Power Scale). Reduce the value from 120 to 85. This digitally reduces the drive voltage to the RD16HHF1 finals. Do not exceed 120.
Once inside the Service Menu, you will navigate a numbered list of parameters (CH-01 to CH-59). To of any menu item, simply key the microphone momentarily. To alter a value , press and hold the PTT while rotating the VFO knob up or down.
The service menu contains several technical alignment settings. Note that these may vary slightly depending on your firmware version (e.g., v3.0). : Adjusts the frequency of the 10.24MHz Adjusting this modifies internal receiver gain tracking to
Press and hold both the (Function) button and the PUSH (Channel selector encoder knob) simultaneously. While holding these two buttons down, turn the radio ON .
If your radio has performance issues (off frequency, low power, distorted audio), do attempt DIY alignment. Instead:
Incorrect parameters can cause final transistor overheating, severe signal distortion, or permanent component failure.