SURECOM SF401 Plus Frequency Counter for Radio Transceiver CTCCSS/DCS Decoder

SURECOM SF401 Plus Frequency Counter works great out of the box. It comes with a charger. I tested it with a few ham radios, a GMRS radio, and Motorola. The operating system may seem old for some, like DOS back in the day, but that makes it work well. Very easy to use and straight to the point. If all you need is a frequency counter, I recommend SURECOM SF401 Plus Frequency Counter—no need for adapters or extra cables. Keep in mind that is very sensitive, so the closer the SURECOM SF401 Plus Frequency Counter is to the radio, the better.

This product had some pretty polar opposite reviews so I wasn't sure if I wanted to buy it, but I did, and this is what I found.I have tested it on Motorola VHF 5-watt and UHF 4-watt portable radios with known frequencies and TPL/DPL codes. The readings were dead-on accurate including the tones. However, sometimes if the radio and counter were too close, the readings were way off....like 900 MHz on a VHF radio. So, if you know generally what kind of radio you have and you get a wacky reading like that, simply moving the radio farther away should give you an accurate reading. The instruction manual does mention this as well.I also tested Motorola DMR MotoTrbo digital radios and for this, I could not get an accurate reading at all no matter what I did. Not even close. It has an analog/digital toggle which I set to digital for the test. But still no good. So if you need something for digital, I don't think this is for you.All in all I'm happy with my purchase for my needs but they should really stop promoting it for digital since it simply does not work in that mode.

Handy tool

Funciona perfectamente, es mas facil de usar para leer las frecuencias y el material de la carcasa es de buena calidad

Works OK with analog frequencies. Does not work at all with digital frequencies. Very disappointed. Will be sending it back.

It does work as intended… But… You have to be right next to an antenna for it to work, I guess it could tell you if your radio is slightly off .00X on it’s programmed frequency, but that’s about it. My SWR meter does this through the antenna, so I didn’t really need this. I am keeping it, though…

I can now use my own radio for work. This way I know it's clean, charged and working right. Used the finder to get the freq and ctoss numbers. Was told it was a hidden channel and can't give it out. Now to steal the bad guys freq at local airsoft games, will come in handy. Just have to make a list of channels, or figure out how to set radio up now.

can be a little iffy on UHF. When transmitting on 455 it would read 800 or 600 or 900. Turned it off and back on and it read 455. Very accurate on VHF. If I transmit on 146.500 it will say either 146.500 or 146.501. Tones are spot on. Battery life very good.