I have two of them. They are branded CRT Micron but seem to be the same. One is used in my car and the other one at home. They are very good and Power consumption is very low. I can recommand these. Kind regards from germany
If you, like me, were wondering how that calculator works: It's basically populating the standard formula for power (given voltage and resistance) P=U^2/R. If you plug in the numbers 0.25uV and 50 Ohm, you get a tiny number that is in Watts. Now since dBm is a relative measurement in relation to a Milliwatt, we need to multiply this by 1000 since 1 Watt = 1000 Milliwatt. Then to get dBm, you simply populate the formula for that: dBm = 10 * log10(P), where P is the power in Milliwatt. This should give you the -119dBm.
Interesting, your SINAD test almost exactly replicates the results I got with the Anytone variant of this radio (AT-778UV) which suggests product consistency and that the set sent to you was typical and not specially selected by the manufacturer..
Nice! Have have 3 of the AT-778UV II radios which is anytone's version of the RT-95. I am working on an interface to make a UHF repeater. This is kind of gives me a warm fuzzy that this project might work out.
Well demonstrated, just a few things to watch, one is the deviation and the bandwidth the radio is set to. In the wider setting of the radio sinad will measure slightly worse at 3k deviation than it will with 5k deviation. A useful thing to remember is that in a 50 ohm system -107dBm is 1uV. When measuring at the speaker output there is often a sweet spot for the volume control for best sinad. Too low and noise rises, too high and distortion rises. Not a criticism at all, I have never used PC software to do the job. Both respectable measurements... 73
Nice explanation of the test. If I pick one of these up, I'll be sure to use the link. The folks that get triggered by you saying the word triggered probably leave as well, so there's that.
If we're looking for a CW signal level, 1kHz should be fine. I would think that for voice signals, something around 300 Hz would be more appropriate. It's very likely that I don't know what I'm talking about and there are some engineering details that I don't understand.
ANY TESTING IS GOOD, ITS GOOD TO TEST ,,OLE CORNBREAD IS HANDS ON OLD SCHOOL GOTTA HEAR IT , WORK IT , PLAY WITH IT , MORE OR LESS TREAT IT LIKE AN ALL NIGHT WOMAN
Looks good. I wonder about the spectrum display going off the scale. That might mean it's input is overloaded. Or maybe the graphing software has no autoscaling. Whatever.
They may also be measuring at the detector, not at the final AF output of the rig. There is usually a crap load of hiss in the AF amplifiers on all radios. Good job Ape! 99.9% of radios have great sensitivity. I'd like to see the measurement of RX selectivity as I feel that is really more useful in the real world. Can the rig reject a very strong carrier just one channel away? How about out of band rejection? I always had excellent results on my older VHF/UHF equipment that had helical resonator filters in the RF input. I believe those days are gone for us hams due to the expense of the product. Most manufacturers skimp on the RF rejection and use DSP in the audio to clean things up. 73 Bro.
Hey Hollywood! I’m sure some will measure in a way that gives them the best results. When reading about the test the most common two ways I saw we at the speaker or the speaker jack. I agreed with your points about sensitivity vs selectivity, maybe an idea for a future video? 🤔
I have two of them. They are branded CRT Micron but seem to be the same. One is used in my car and the other one at home. They are very good and Power consumption is very low. I can recommand these.
Kind regards from germany
Yeah, I imagine they are sold under a few different brands. Thanks for checking out the video 👍
Great test Ape!!
Thanks Chuck!
If you, like me, were wondering how that calculator works: It's basically populating the standard formula for power (given voltage and resistance) P=U^2/R. If you plug in the numbers 0.25uV and 50 Ohm, you get a tiny number that is in Watts. Now since dBm is a relative measurement in relation to a Milliwatt, we need to multiply this by 1000 since 1 Watt = 1000 Milliwatt. Then to get dBm, you simply populate the formula for that: dBm = 10 * log10(P), where P is the power in Milliwatt. This should give you the -119dBm.
Great info, thanks PCfreak 👍
Nice test of the receiver! 73
Thanks Jeff
Interesting, your SINAD test almost exactly replicates the results I got with the Anytone variant of this radio (AT-778UV) which suggests product consistency and that the set sent to you was typical and not specially selected by the manufacturer..
Thats awesome 1903, thanks for the info and for watching 👍
Nice! Have have 3 of the AT-778UV II radios which is anytone's version of the RT-95. I am working on an interface to make a UHF repeater. This is kind of gives me a warm fuzzy that this project might work out.
Good luck on the project Daniel 👍
Id like to see more about the computer connections and SW you used to make this
I can do a video on the set up 👍
@@TheSmokinApe
Thanks !
Im sure once setup it will be useful for other purposes as well.
@@KA4UPW yeah, for sure
Awesome thanks for this. I've wondered what the sinad measurement meant in practice.
Thanks for checking it out Michael 👍
Well demonstrated, just a few things to watch, one is the deviation and the bandwidth the radio is set to. In the wider setting of the radio sinad will measure slightly worse at 3k deviation than it will with 5k deviation. A useful thing to remember is that in a 50 ohm system -107dBm is 1uV. When measuring at the speaker output there is often a sweet spot for the volume control for best sinad.
Too low and noise rises, too high and distortion rises. Not a criticism at all, I have never used PC software to do the job. Both respectable measurements... 73
Thanks G0fvt. I did see variation with volume 👍
@@TheSmokinApe well done on the video, I realise you cannot do the subject to death in a modest length presentation.
Thanks man 👍
The TinySA works great for SINAD measurements. I need to check it out.
It’s like a Swiss Army knife!
Nice explanation of the test. If I pick one of these up, I'll be sure to use the link.
The folks that get triggered by you saying the word triggered probably leave as well, so there's that.
Hey Norrin, thanks for checking out the video 👍
If we're looking for a CW signal level, 1kHz should be fine. I would think that for voice signals, something around 300 Hz would be more appropriate. It's very likely that I don't know what I'm talking about and there are some engineering details that I don't understand.
The SINAD test uses a 1kHz tone and then a filter to notch it out. You want to compare the total "noise" with and without the signal.
Cool test! There really seems to be a lot you can do with the TinySA.
It knows no bounds...
thank you.
Sure think Mike 👍
Don't you Diss my cats!😂🐈🐈🐈🐈
Lol
Where did you get the SINAD software?
comtekk.com/sinad.htm
Interesting video
Thanks man 👍
ANY TESTING IS GOOD, ITS GOOD TO TEST ,,OLE CORNBREAD IS HANDS ON OLD SCHOOL GOTTA HEAR IT , WORK IT , PLAY WITH IT , MORE OR LESS TREAT IT LIKE AN ALL NIGHT WOMAN
Lol, thanks for watching Cornbread 👍
@@TheSmokinApe SMOKIN YOUR THE BEST CHANNEL ON UTUBE DIDNT NO BODY TELL YOU THAT,, T FOR TEXAS
@@cornbread-KO5RN I tell myself that every day 🍻
Looks good.
I wonder about the spectrum display going off the scale. That might mean it's input is overloaded. Or maybe the graphing software has no autoscaling. Whatever.
I think it’s an autoscaling issue as you mentioned. Thanks for checking it out Lee 👍
They may also be measuring at the detector, not at the final AF output of the rig. There is usually a crap load of hiss in the AF amplifiers on all radios.
Good job Ape!
99.9% of radios have great sensitivity. I'd like to see the measurement of RX selectivity as I feel that is really more useful in the real world. Can the rig reject a very strong carrier just one channel away? How about out of band rejection? I always had excellent results on my older VHF/UHF equipment that had helical resonator filters in the RF input. I believe those days are gone for us hams due to the expense of the product. Most manufacturers skimp on the RF rejection and use DSP in the audio to clean things up.
73 Bro.
Hey Hollywood! I’m sure some will measure in a way that gives them the best results. When reading about the test the most common two ways I saw we at the speaker or the speaker jack. I agreed with your points about sensitivity vs selectivity, maybe an idea for a future video? 🤔
Smarter than the average Ape!
Barely
Does this radio have the scramble feature
I'm not sure
What software is sinaid?
ComTekk
I dislike cats more than sponsored videos so i stayed.
Well thank you for watching!
I have this radio. Good info thanks.
DE KK4LBJ
Thanks for checking it out Wayne 👍