Comparing Retevis RB48 and RB48 Plus: Which Channels Can Communicate?

When using two different models of walkie-talkies, ensuring they can communicate on shared channels is essential. The Retevis RB48 and Retevis RB48 Plus are popular models, but do they have compatible channels? In this article, we will compare their factory default frequencies and determine which channels allow seamless communication.

Understanding Compatibility of RB48 and Retevis RB48Plus

The two types of RB48 series radios can communicate if they share the same receive (RX) and transmit (TX) frequencies and the same CTCSS/DCS encoding. If any of these parameters differ, communication may be blocked or distorted. By comparing the frequency tables from the manuals of both devices, we can identify the compatible channels.

Rb48 Channel Chart 

Rb48 Plus Channel Chart 

Which Channels That Rb48 Can Communicate with RB48 Plus

After analyzing the default frequency charts for both models, we found that the following channels are fully compatible:

✅ Channels 1-8 – These channels have identical frequencies and matching CTCSS/DCS codes, ensuring smooth communication between RB48 and RB48Plus.

✅ Channels 14-22 – Like the first eight channels, these also have the same RX/TX frequencies and CTCSS/DCS encoding, making them ideal for seamless use between the two models.

Channels That May Require Adjustment

Some channels have the same frequencies but different CTCSS/DCS settings. These settings act as “privacy codes,” filtering out unwanted transmissions. If these settings do not match, users may not hear each other even if the frequencies are identical.

❌ Channels 9-13 – While the frequency settings align, RB48 and RB48Plus use different DCS/CTCSS codes. To enable communication, users need to manually adjust the codes on both devices to match.

Channels That Are Not Compatible

Some channels do not match between the two models, making direct communication impossible without reprogramming.

❌ Channels 23-30 – RB48 and RB48Plus have differences in these channels, either due to missing settings or variations in encoding, preventing seamless communication.

How to Ensure Compatibility?

To maximize compatibility, follow these steps:

1. Use channels 1-8 or 14-22 for immediate communication without adjustments.

2. Manually match the CTCSS/DCS settings on both devices for channels 9-13.

3. Avoid channels 23-30 unless you can reprogram the radios to align the frequencies and encoding.

Conclusion

If you own both the Retevis RB48 and RB48 Plus, you can communicate effortlessly on channels 1-8 and 14-22 without any modifications. For channels 9-13, some manual adjustments are necessary, while channels 23-30 are incompatible by default. By understanding these differences, you can optimize your radio usage and ensure smooth communication in any setting.

Have you used both of these radios together? Share your experiences and tips in the comments below!