While specific item numbers can vary by firmware version, these are frequently identified settings:
: Sets the Peak Envelope Power (PEP) for Single Sideband. 4. Modulation and Deviation (AM-M / FM-D)
Calibrated using a two-tone audio generator to verify the final transistors reach peak linear output (around 50W–60W PEP) without clipping or distorting. 3. S-Meter Calibration (RX Gain)
The AnyTone AT5555N II service menu offers advanced users and technicians a range of settings and adjustments to customize and optimize the radio's performance. However, access to these settings requires caution and technical expertise. If you're not experienced with working with radio transceivers, it's recommended to avoid making adjustments in the service menu to prevent potential damage or performance issues. Always consult the user manual and technical documentation before attempting any adjustments.
The AnyTone AT-5555N II is a highly popular, modernized all-mode ten-meter transceiver. While the standard user menu handles day-to-day operations, the hidden service menu allows technicians and advanced operators to calibrate internal parameters. Accessing and adjusting this menu requires precision, as incorrect settings can degrade performance or damage the radio. Understanding the Service Menu anytone at5555n ii service menu work
The internal service menu contains several specific operational blocks. While AnyTone keeps the exact factory engineering codes proprietary, service work generally addresses three main areas. 1. Reference Oscillator Calibration (Ref-Freq)
However, even the best factory-produced radios have tolerances. Over time, or immediately after purchase, you might notice that your transmitted frequency is off by 50 Hz, your AM carrier is too high, or your SSB output power seems low. This is where the hidden becomes your best friend.
service menu lets you adjust fine-tuning, AM modulation levels, power outputs, and RF gain baselines. This comprehensive guide provides step-by-step instructions on accessing, navigating, and modifying these factory parameters safely. ⚠️ Crucial Warning Before You Begin
: Rotate the Channel Selector / VFO Knob to move up or down through the numbered parameter channels (e.g., CH-01 to CH-60). While specific item numbers can vary by firmware
Before you proceed, it's crucial to understand the gravity of what you're about to do. The service menu gives you access to parameters that directly affect the radio's hardware calibration.
"High power... P2," he mumbled, referencing the scrawled notes in his lap.
Power off the radio completely. Wait 5 seconds. Power on normally. Your changes are now active.
| Menu # | Parameter Name | Description | | :--- | :--- | :--- | | 16 | AM Hi Pwr | Sets the maximum AM power output. | | 17 | AM Lo Pwr | Sets the minimum AM power output (Dead Key). | | 19/20 | Modulation | Settings controlling modulation levels for different modes. | | 24/28/32/36 | xxTONE | Controls the transmitted audio tone characteristics for different modes. | | 52 | RFG | Adjusts the internal RF Gain, affecting sensitivity and noise floor. | | 59 | RXPIL | A setting that some users adjust to improve receive audio quality. | | N/A | FM.DEV | Adjusts FM deviation. The radio also has a separate menu for this in the user menu. | If you're not experienced with working with radio
: Used specifically for SSB modes (USB/LSB). It suppresses the carrier signal so that only the voice sidebands are transmitted.
The service menu is a playground for casual users. Adjusting these settings without a frequency counter or signal generator can easily "brick" the radio's performance.
: Hook the radio up to a dummy load and a high-precision frequency counter. Key the mic on a known frequency (e.g., 28.000 MHz) and adjust this value until the counter reads exactly 28.0000 MHz. 2. Carrier Balance (C-BAL)
Once on, press the following keys in quick succession: , then [NB] , then [DW] . The display should now show the service menu options.
while turning the power on. This defaults the frequency range to 25.615–28.305MHz. Warning: Use with Caution
| Issue | Probable Cause | Solution | | :--- | :--- | :--- | | Radio won't TX after adjustment | Lowered P-07 to 0 accidentally | Re-enter menu. P-07 minimum is 1. Set to 20 as baseline. | | Frequency jumps wildly on SSB | P-32 set too high/low | Reset P-32 to default (typically 128 or 130). | | AM audio sounds distorted | P-45 set over 220 (100%+ mod) | Reduce P-45 to 190-210 range for clean audio. | | Settings revert after power cycle | Forgot to save with FUNC button | Repeat adjustment, then hold FUNC until beep. | | Screen shows "P-01" but can't change values | Lock engaged? Knob broken? | Turn the main channel encoder, not the volume knob. |