Anytone At5555n Ii — Service Menu Updated [2021]

Many units leave the factory set conservatively around 31 . Operators looking for wider audio response tweak the internal modulation parameters up to a maximum cap of 63 . 3. SSB Frequency Offset Fine Tuning ( bfC , loC , fr0 - fr9 )

| Parameter | Function | Default Value | What it controls | | :--- | :--- | :--- | :--- | | | VCO Lock Voltage | 2.5 – 4.0V | Do not adjust unless VCO unlocks. | | P-02 | PLL Reference Freq | 0 | Fine frequency calibration (TX/RX offset). | | P-03 | AM Carrier Level | 15 – 25 | Adjusts dead-key carrier for AM mode. | | P-04 | AM Modulation Limit | 90 – 95 | Max percentage of AM modulation. | | P-05 | SSB ALC Max | 80 – 95 | Prevents splatter on sideband. | | P-06 | FM Deviation | 20 – 30 | Sets narrow/wide FM shift. | | P-07 | High Power Scale | 100 – 120 | Digital power amp gain (MOSFET drive). | | P-08 | Low Power Scale | 20 – 40 | Minimum power output floor. | | P-09 | S-Meter Zero | 0 | Calibrates S9 signal reading. | | P-10 | Squelch Threshold | 5 – 15 | Minimum open point for SQL knob. |

This brings us to the "updated" part of the keyword. The service menu's complexity means that the community, rather than the manufacturer, often drives knowledge updates. As users gain more experience, they share new discoveries about parameters, access methods, and default value lists.

The Anytone AT-5555N II is a powerful and versatile two-way radio that offers reliable communication and advanced features. With the updated service menu, users can unlock even more customization options, improve performance, and enhance security. Whether you're an amateur radio enthusiast, emergency responder, or business user, the Anytone AT-5555N II with the updated service menu is an excellent choice for your communication needs. anytone at5555n ii service menu updated

Adjusts the automated or manual squelch tight/loose threshold limits. This defines the exact voltage cutoff point where the receiver breaks squelch to let audio through. 5. Reference Frequency Fine-Tuning

Hook up the radio to a frequency counter via a dummy load. Transmit a carrier on a known frequency (e.g., 27.005 MHz or 28.000 MHz) in CW or FM mode. Adjust the service menu reference value until the frequency counter reads exactly true. 2. TX Power Output Alignments (AM / FM / SSB)

These are commonly used to adjust the modulation swing and High/Low power output settings for AM. Many units leave the factory set conservatively around 31

The updated service menu for the Anytone AT5555N II offers a wealth of new features, improvements, and enhancements that can help users unlock the full potential of their radio. By accessing and adjusting various parameters, users can optimize their radio's performance, troubleshoot issues, and take advantage of new capabilities. However, it's essential to exercise caution and follow proper safety procedures when working with the service menu. With this guide, you'll be well on your way to becoming an expert in using the updated service menu for the Anytone AT5555N II.

The firmware updates on the AT-5555N II have standardized the button combination required to enter the engineering mode. Follow these steps precisely: Turn the radio .

Adjusts the percentage of AM modulation. Setting this too high causes severe audio distortion and clipping. Troubleshooting Common Service Menu Issues The Radio Won't Enter Service Menu SSB Frequency Offset Fine Tuning ( bfC ,

Turn the channel knob to select (expanded) or BAND 1 (10m).

: You can adjust Squelch (SQ) levels from 1-36, toggle ECHO functions, or set SWR Protection .

Now that you have the service menu map, go forth and align your AnyTone to perform better than the day it left the factory.

In the updated service menu firmware, users often report that AM power cannot be raised to the level of FM power.

Before you change anything, read this section carefully.