Hello, this is the Fersi uh FNB 58 USB fast charge tester and you can see here that it does uh, volts to five decimal places. Uh. also amps and watts also temperature there but it does a lot more besides. so let's go through it.

I might have to work quite quickly because there's a lot to go through. Okay, unboxing here it is I'll take it out of its box and also there's a little uh LCD cover there. Let's power the device up uh from a power bank. this is one of the newest Power Banks I've got and you can see there uh the first screen which is voltage current and you got a direction arrow for the current as well uh and watts and also temperature.

Now before I go on to any of the other screens I think I'm going to do uh inputs and outputs the navigation system Connectivity: USB Type A Now this is a five pin maale plug. Uh, there's also a USB type A socket at the back. Here there are two USB type C's these are 24 pin uh, this one's called input and this one's called output. uh and there's a switch here that switches on and off the power delivery com signal.

There's also uh, an input here which is micro USB type uh, micro B Now on the top there's another microb USB but this is for connecting to a PC to run the PC software. Um. Also, you can use this to power this device so if you're doing something uh, where you don't want this to power off while you're changing input and output sockets and we'll come back to that, then you can use this to keep it powered. Here's the navigation system.

You can press the uh wheel button down in the middle. there as a sort of okay function. there's a a back function and then there's left and right on the wheel. And actually this navigation fun uh system works quite well.

Little blue LED in there? Is that everything covered? Yes, I believe it is. Oh, apart from uh, there is a Bluetooth module on the back here so they've cut a hole in the metal case. uh for the Bluetooth RF signal and you can use this in conjunction with an app which you can install on a phone. Now on this first screen, you've got uh, run and pause.

So if you pause, if you press the button in, you can pause. Red light comes on or run so this is continual updating and that's green. Okay, let's move to the next screen. Similar.

You've also got Volts, amps and Watts, but now we've got additional information. We got the voltages on D minus and D+ We've also got some decoding of what it's seeing on D minus and D+ so we can see that we've got dedicated charging port uh 1.5 amp and also Apple 2.4 amp. Now there are 10 memories and you can do data logging. so you've got the energy statistics here in uh, memory.

one of those 10 with time capacity in Amp hours and uh, energy accumulated energy in wat hours. The next screen is an oscilloscope and there are various modes here so we can see here the voltage uh to five decimal places again and we've got current. There isn't any current because there's nothing plugged into the back. Now this shows us the key frequency which is showing well it's dating about but it's around 100 khz and also the peak to- Peak noise which it showing at about 40 Mill volts.

Um there is a Time base uh indicator here. 20 micros per division. Now to change this you have to rock and hold and then that will change to 10 micros per division, 5 micros per Division and 2.5 is the fastest. This also has run and pause by pressing the button in like so and if you hold the button in you change to a different mode.

This is more of a data logging mode. Uh, voltage and current are both logged and we can change the time base from 0.1 seconds per division. It says limited so that's right up at one end and you got to do this Rock and hold. One thing I've noticed is if you let this time out and the screen goes dim it uh does respond to presses and single movements of this rocker which here would just take us into another screen but it doesn't respond to rock and hold so you've got to get out of the dim mode probably by using the back button or something like that.

and then you can reuse the Rock and hold. so data logging goes all the way down to 5 seconds per Division and that's the limit. Press and hold this rocker again and we get into logging of the D+ and D minus signals. Uh, again, probably we can change the time base yes, 2 seconds per division5 so that you can see what is happening to those signals.

Uh, if some sort of communication is going on. And then the fourth screen after oscilloscope is an applications uh, menu with fast charge options, statistics, options, a toolbox of other functions, and a settings uh screen. If we go into that you can see, we can set things such as: display brightness, standby brightness, the time uh, it takes to go into standby brightness, refresh rate settings for recordings, trigger settings uh, system settings, restore factory defaults, and an about which tells you the firmware and other information. So the navigation.

you can use the back button to come out of a function like this: I Don't think I can come out of that. No, Uh, so those are the four screens I'll just go through them again. Okay, now if we go into fast Charge and press this button, it gives you a warning. Now this is because what it's going to do in this mode is try and Trigger all the fast charge protocols in sequence and then list them to show you what's available so you don't want anything connected on the output because that could get up to 20 volts.

So definitely don't want phone or something like that on there but even a little LED light, you'd probably blow it. Okay, so we'll go into that now. We can do automatic detection of Uh PD and other protocols so quick charge and all the Exotic ones. Um, we've got PD trigger so that we can uh trigger from Power delivery, the higher voltages like uh 9 volts, 12 volts, 15 volts, and 20 volts and uh Qc2.0 uh, qualcom, fast charge and Qc3.

Okay, in statistics, we have uh, energy statistics, uh, battery capacity calculations so you can test the capacity of batteries. uh Power Banks I Suppose Specifically and offline recording you can view your offline recording curves. There must be a fair bit of memory in here. Uh, in the tool box, we've got cable resistance detection.

I will go into this in some detail so you can measure the resistance of USB cables. You've got a PD listener which means that you can look at the communication signals between a power bank and another device. Uh, to see what's happening on the PD uh uh. control signals PD converter probably won't go into that USBC E marker.

It can tell you whether your USB type-c cable has an E marker chip. That's the chip which uh tells devices either end of the cable that you can use use 5 amps rather than the standard three, right? Let's look at some specific things. So I'm going to press the back button to come out of here. uh and I need to rock across I'm going to do the oscilloscope because I found a power bank which has quite an interesting output.

So let's get that. this is the power bank. I'm not going to show the brand name cuz I'm not trying to dis any particular brand, but this one does have an interesting effect. Um, the other thing is the connector here just doesn't seem to mate very well with this and if you push it all the way in, it just doesn't seem to connect.

So I'll I'll run it at the end of this. um, short extension lead. Okay, let's switch that on and take a look at the oscilloscope and uh, yes, we've got quite an interesting uh curve here with a very interesting frequency. Um, this is actually showing a frequency I'm going to have to rock this to fit more on at Uh 10.

let's say 20 microc per division, but we've got a very low frequency. I mean that's in the audio range. This is showing around about 7 khz and the peak to Peak noise on the 5vt output is actually half a volt. It's absolutely enormous now.

what if I load that down with a constant current electronic? DC load Uh, that's on minimum. You can see the current. there is very little as I increase the Uh load current. Oh, then you can see that the frequency of the Uh converter Electronics in this unit is changing and now I can rock and hold this rocker.

Uh, let's go back the other way. Oh I might be in the dim mode I Am in the dim mode and that's where Rock and hold doesn't seem to be uh actioned. So you need to come out of the dim mode by pressing any button I think it is. but the back button is convenient.

So here the frequency has increased to around around 30 khz so that's no longer audible. but we've still got 460 MTS of Uh noise. Let's start increasing the load up to half an amp there. So the frequency is changing and the more I increase the load.

uh, the faster the frequency gets. We're up to 100 kohtz now. So I can rock and hold to get. uh, more detail on that.

That's the fastest 2.5 micros per division. Let's go back to 5 mic seconds per Division And uh yeah, this power bank was just interesting because it just had a lot of Um oscillation on the 5vt output right? I Want to change, um, the supply power now. but I don't want to lose the oscilloscope function. So what I'm going to do? I've got another Uh USB converter here from a power tool battery I'm going to plug that into this top USB type B Port That means I can take off the input uh device but but I've still got this thing powered up now I can go to another uh USB power bank and then take a look at the difference on that one again.

I've got an approximate 1 amp uh load. This fan has started up and that's getting quite warm now and you can see that this has got a very different amount of Um peak-to Peak uh noise and at a different frequency. So once again, I can work through the time base to get a bit more detail on that. Uh, that's the best I can do, but this has only got 50 molts of Uh 5volt noise, right? So that's the oscilloscope Now let's um, move on to the applications.

Let's go into fast charge. Uh, we get the warning that uh, this menu can trigger high voltages on the output, but we'll go into that. So let's do an automatic detection of all the protocols that this, uh, fairly modern power bank can offer. so this just goes into into a detection routine.

No, PD cuz we're on the USB type a socket but we have got Apple let's try it again with this switched on and uh, I can just press that and run that again and see what it comes up with. Okay, Apple Dedicated charging port Now we've got Samsung 9 volts. Uh, we got Huawei 12vs we got QC type 2 12 volts. We've also got Qc3 12 volt so 12 volts would have appeared on the back end there.

This one also has PE plus 1.1 and PE plus 2.0 Whatever, they are Okay, let's compare that with this old power bank which I do believe has Qc2 but not Qc3. so let's run this routine again. Uh yeah, that should have triggered Qc2 H maybe this one's switched off I'll switch that on. No.

Huawei Yes, it's detected Qc2 up to 12 Vols but no Qc3 and I do know that this is a Qc2 only power bank. So far less functionality on this older power bank than on this newer one, right? Let's go into the next Uh function which is PD trigger so we can trigger uh the different modes in power delivery. Now it says failed to detect PD charger and that's because you have to switch on this PD com signal. Okay, so here we've got all the PD modes available from from this device and they are 5V 2 amps and we can now switch between them and you will notice I've now triggered 9 volts.

We're actually getting 9 volts on this cable. Uh, so there would be 9 volts on the USB type C out and presumbly on the Uh type A out. Uh and I can also trigger 12 Vols 1.5 amps right? Let's take the USB type C cable out of that power bank and I've got a power station uh here which has a PD 100 wat output on it and you can see that this one triggers more modes. If we've got 5 volts, uh, we can go into 9 Vols 12 Vols.

We've also got 15 and 20 volts and they're all showing up here on the voltmeter. There's also this one which is a 3.3 to 16 volt at 3 amps uh mode. and there's also a 3.3 volts to 21 volts at 3 amps mode. And presumably if I press this button I can yeah, now move the voltage in increments of 100 Ms right in the application screen.

We've now got the toolbox so let's go into that and we get to Cable resistance detection. So for cable resistance detection, uh, you need to take a reference value with no cable. Now the only way I can see of doing that is to plug the Type A plug into USB Um, we need voltage and current so I'm going to have to put my Uh DC load in here and the manual says set the DC load to somewhere between half an amp and Uh 1 amp. So let's do it at 75 amps something like that.

So we've got a voltage and current reading now we press the button to take a reference. Oh that just brightened it up. So we got the reference values in this box here. Now we introduce the cable.

so I'll pull this out and that's where it's useful to have it powered up separately and I'm going to test this horrible type A to Type C cable which came with a little cheap uh torch thing and it has a really poor resistance. So Type C I have to plug it into here. Now Yes, we are using a different connector and the connector resistances are going to be slightly different, but there's not much I can do about that. and you can see here that the real time voltage and current and we've got the same load um, are giving me a value of 1.6 ohms.

So this very short cable has a resistance of 1.6 ohms. Uh, calculated from the fact that we got a huge voltage drop. so the reference voltage was 5.2 volts. We're now only seeing 3.9 at this input.

Port Uh, the current is the same because this is a constant current. uh load. it's still pulling uh 75 amps even at that lower voltage. So for this function, you do need to use a constant current one of these adjustable constant current loads.

So let's compare this cable uh with another type A to Type C cable and the type C into. here. We can use the same reference information because that's with no cable and this one is better. It's 350 milliohms and you can see that the voltage is considerably higher 4.9 Vols And we've got the same current 75 amps.

Okay, let's come out of that test and now we'll go into. well. let's do the Uh C USB Typc E marker test and that's going to look for uh, the E marker chip in a USB Type-c cable. So I have two USB type-c to Type-c cables here.

the Uh blue one or the green one is a standard 3 amp so it doesn't have an E marker chip. Uh, if you want to cable to indicate to the two devices either side of it that the cable is good for 5 amps, then it does need an E marker chip. So let's plug in the Uh 3 Amp cable without an E marker. you do need the little PDC switch on uh for doing this.

Now it seems that you can plug this in either socket and you can see that it doesn't find the E marker chip. CU that cable doesn't have one. However, if I plug in Uh, this cable which does have an E marker chip, you can see immediately. It's able to read that chip and you got all sorts of information here.

Uh, Vendor: ID it's not in there passive USB 3.2 Gen 2 uh length is 0 to 1 M Oh, that's interesting I wonder if I've got a 5 amp cable that's longer than 1 m maximum voltage 20 volts, maxximum current, five amps, and uh, no hardware and firmware codes in there and it seems you can plug this cable uh into either socket and get that information up and can you connect it either end? Yes, it seems that the chip is readable in either socket and either end of this 5 amp cable. Okay, Finally, let's go into PD Listener and this is where it will just show you stuff related to PD protocol and I'm going to put a power bank in uh one socket and I don't know another power bank perhaps in the other socket, right? Let's use the PD Listener between this Xtar power bank and my RAV power power bank. and if I plug in the Rav power then we should get the capabilities now. I Think it's yes, that says in So the Ra power is the source and it has these five uh, different Uh voltage ratings 5 volts up to 20 volts and you can see if you press uh the okay button source and sync information uh on the PD listener.

Now if I press and hold the Rav Powers power button and hold it for 10 seconds it actually changes Direction and now the Xtar is the source. Uh, you can see that it's saying out so it can provide these three voltages 5, 9, and 12 and it says it's a maximum 18 watt uh power bank And then if I change direction again to make the Rav power The Source Uh, once again, we can now see that it's a maximum 60 wat power bank. which this it is. it has a 60 wat output.

It's currently using the 12vt option because the Xar only goes up to 12 Vols But it does have these five Uh voltage options so that was a little. Look at the FI FNB Uh 58 USB tester. Huge amount of functionality on this thing. Uh, my knowledge of USB and particularly USB type-c probably isn't sufficient to cover everything in complete detail, but I Hope that overview uh gave you just an introduction to what this device can do.

So um, purchase links will be in the description below this video, but that's it for now. So cheerio!.