BAOFENG AR-5RM Frequency Hopping?

[tlcsr66]

In the user manual it says there is a frequency hopping feature for these radios. Has anybody tried it? If so what were the results?

[jpolcari]

I have this radio.

Here is what Baofeng support said when I asked.

I haven't tried it.

 

"When using the frequency hopping function, your transmit signal undergoes the following process:

Initial Frequency: You may set it to 146.5200 MHz or 156.5750 MHz, but this is just the starting frequency.

Frequency Hopping: The system rapidly switches between multiple frequencies.

For example, it might transmit for a short duration on 146.5200 MHz, then jump to 147.0000 MHz, and then to 156.5750 MHz.

Interference Resistance: Because the signal quickly hops between different frequencies, it is less susceptible to interference or eavesdropping.

Synchronization: The transmitter and receiver must be synchronized to ensure both are communicating on the same hopping sequence.

Summary

Your signal will be transmitted in a rapid hopping manner across different frequencies, enhancing the reliability and security of the communication.

 

Regards,

Olivia

Baofeng Support Team"

[dosw]

1 hour ago, jpolcari said:

I have this radio.

Here is what Baofeng support said when I asked.

I haven't tried it.

 

"When using the frequency hopping function, your transmit signal undergoes the following process:

Initial Frequency: You may set it to 146.5200 MHz or 156.5750 MHz, but this is just the starting frequency.

Frequency Hopping: The system rapidly switches between multiple frequencies.

For example, it might transmit for a short duration on 146.5200 MHz, then jump to 147.0000 MHz, and then to 156.5750 MHz.

Interference Resistance: Because the signal quickly hops between different frequencies, it is less susceptible to interference or eavesdropping.

Synchronization: The transmitter and receiver must be synchronized to ensure both are communicating on the same hopping sequence.

Summary

Your signal will be transmitted in a rapid hopping manner across different frequencies, enhancing the reliability and security of the communication.

 

Regards,

Olivia

Baofeng Support Team"

Do you know the name of the menu option that needs to be enabled for this to work? I wanted to hook it up through 70dB attenuation to a TinySA, to see what is happening.

UPDATE: Found it. Menu option 41: Voicepri (on/off).

I don't see it doing anything. I suspect I would need two device both with this set up to actually work. When I key up, I just see the frequency I have selected being used, within the TinySA, and also when I directly connect to my RTL-SDRv4 (both through 70dB attenuation).

[WRXB215]

1 hour ago, dosw said:

I suspect I would need two device both with this set up to actually work.

That ↑↑↑↑

[AdmiralCochrane]

Quote

146.5200 MHz, then jump to 147.0000 MHz, and then to 156.5750 MHz.

That's not just frequencies, that's different assigned bands.  Fine for SHTF operation, but completely contrary to regs before then.  156.5750 is in the marine band.  FCC and USCG definitely monitor marine band and hunt down land based violators.

Another exception is, a fairly narrow slice of spectrum like this is easily monitored by a very fast scanner that would hear it all.