Hi just the other month I did a video of my old lab when I was like just about to clear it out and move into the new lab. It did like a video - I might have to link that in if you haven't seen it. Anyway, turns out like Rohde & Schwarz saw that video and they were a bit disturbed by my lack of all the quality of the power supplies in the Eevblog lab so they said hey, we're gonna send you something cool and sure enough 3a boxers have turned up. Thank you very much ruining Schwartz they yeah it seemed probably offended at the type and quality of my lab power supply so they went.

We'll send you some real power supplies you can use in the lab so thank you very much Rohde Schwarz! Oh this'll be I guess maybe like a quick unboxing, quick play around, and maybe some tear downs? Let's go I Love a high quality power supply. like probably the best one I've got here like a general-purpose lab supply is that Roy Goal one which we had so many issues with and I did so many videos on getting that fixed but it's okay and I've got a couple of old ones that I built when I was a kid and I've got a couple of good HP ones or HP / Agilent ones. Know this keysight rubbish, but they're like large big system. DC Power supplies not really very useful.

nice supplies, but not very useful for general lab use. So apparently they sent me some very schmick lab power supplies. Let's take a look. Start with the biggest one.

Is that somebody who's tested that? What's sarin in thought in siren? someone's name I Don't know Ossie Power plug with a couple of spare fuses HRC Decent ceramic ones. Nice. That's what we're gonna get. Doesn't that look like sex on a stick? Basic safety instruction comes with the calibration certificate.

Looks like we've got a four-channel 384. What? HMP 40 40 HMP that'd probably be the hey Meg one. So there then probably branded Rohde & Schwarz because it's Rohde & Schwarz up the top, but designed and maybe built in the hey Meg factory had they bought out hey Meg a long time ago. Power supply attested I Remove all meat.

Oh, there's the stuff they used to measure it. Sweet. Nice to get a cow certificate with it. So sometimes that's good enough for the company metrologist who's in charge of.

you know, calibration. at late large companies, they'll have someone in charge of this. Often they'll go. No, we don't trust anything that comes from the manufacturer.

We need to send it away straight away to get it independently and test it at our favorite test house. But you know this is Rohde & Schwarz. That's interesting. Lee This They got like a hinged kind of arrangement like that with cardboard on there to protect the controls or and the connectors or whatnot.

Ah, cardboard on the bottom just for I guess to keep it all together. That's very, very nice. Oh wonder if they got a patent on that? Yeah, look at that cutout to protect the controls. Ah, Beautiful! Rohde Schwarz probably have a packaging engineer who like it, took pride in designing that packaging that's fantastic.

Look at this that's sex on a stick. That's a real power supply. Wow Rohde & Schwarz branded HMP Forty Forty Programmable Power supply 384 watts Wow No binding posts they've got. these are our banana plugs so probably more suited to like a system integration thing.

I Don't know if you can buy like a rack kit for this. They don't seem to have holes on the side for like a rack thing, but you could probably I'm sure you could I guarantee it. Actually, they do sell you a some sort of rack kit for this, but doesn't that look schmick? Earth Terminal on the front. if you're using, this is your everyday one, but you could make like an adapter that sort of plugged into there and had some binding posts as well.

if you wanted to. there's plenty of room there. I Might actually design one actually with Heather You know the sense lines coming back and nice big binding posts on there. Nice keypad.

It looks like those buttons do. They light up. They look sort of transparency. We've got four channels on here.

Beautiful. What's on the back? Something's on the top. this. It looks like we can probably stack them.

What do you think? I Reckon we gotta be able to stack these puppies? Yep. matches up. Look at that. stackable.

Nice. Got two fans on the side and the other side was a Inlet but they've got inlets on the top as well. so on the back. this rear channel outputs as well.

Beautiful. and it looks like I think it's probably optional. The Ethernet USB interface. Ah sweet as verify your line voltage.

Yep. 230 volts. Well Ernie expires if broken. Well, we might have to bust that right.

Open Engineering Germany Manufactured in Malaysia Interesting and this thing weighs a ton - it's gonna be a linear supply. None of the switching rubbish. I Know everyone wants to see inside it, but I do want to power it up just Stoke This baby up. Oh yeah, all the buttons light up.

Look at that. it's gone through itself. Test. Ah whoa.

Fan noise. Well no, it just stopped. so obviously it just powered on for a second. No sir, if you heard that you probably did.

Um, that's nice display. It's a it's a dot matrix but it's It's got exactly what you want. Nice big large fonts here. Look at that three digit resolution on the thing and you got your voltage current and your power.

There's no indication of like constant current constant voltage mode so I'm not sure what the deal is there. Let's just have a bum around with it. Haven't read the manual at all so it. looks like we can put Channel One.

It would be nice if the buttons were like here next to it. Are they color-coded No. There you go so there's no indication on the screen it's on her off. but that's okay cuz you've got the nice big bright LEDs here o Output: Hang on.

Oh, there we go, right? So you've got a okay, so output on and then you can turn individual ones off or on. Okay, a bit of residual here, but it's giving you the true read back there. So yeah, so that's not the set voltage. that's the red and the and this isn't the set current.

this is the read back current. There you go. So a little bit of residual offset. You'd expect that if we go fold each on.

Oh, look at that. Okay, so we've got our cursor. We can add what I did time out I Think it timed out so we can adjust it like that? No worries, that's pretty easy or we can just go. Can we just go one enter like that.

So 5.05 enter Sweet. So this would be this is a 40 volt. Is it was it that 32 volt and current there we go by default goes over to the least significant digit. yeah and it times out okay I can understand why they did that I Guess whether or not it's annoying or not I'd have to use it in anger to tell you.

But okay, fair enough I can understand that not 5 amps. so 32 volts, 5 amps per channel. They're all galvanically isolated channels and they're all got the same power on each channel. Oh yeah, Do tells you down there 0 and 30 volts 0 at oh, 10 amps, 160 watts max.

So why could we only go to 5? That's because everyone's already guessed it. if we turn off two other channels I betcha, we can go to 10 amps. Nope. Oh ok, so that right, that's the one you're entering.

That's interesting. It's flushing purple I Hope the colors are sort of showing up there. so if we turn off that now, can we do 10 amps now? We can do 10 ants. There you go.

if you've got a single-channel would it be nice if it had the set current on the display here? you know there's room to put like, you know, sets. you know, set equals in a small font. something like that so you know what your set current is I Think that's a bit of an oversight. and we've got menu E stuff.

Fuse link in between the channels that's a like a software fusing type thing. fuse. Delay over Voltage protection I Don't know if that software over voltage protection are true, how we're arbitrary capability because you can't actually program these and have step responses and do all sorts of jazz reset device information. No.

I've gotta press it. There you go when your firmware fancy-pantsy power supply with firmware. next box. We don't have any of the flippy foam thing, but look at the custom foam padding around the controls and everything.

Beautiful! So what's this one? It's a smaller beast and we got the once again to HRC fuses and the little terminal block as well. Awesome! Now this one looks more like a little general-purpose bench supply. Look at their depth of those binding post / banana this shrouded banana Jack's they are ridiculously deep. Wow I Have not seen anything like that before.

Why blue? Why blue? Is that them? Because it's rodent Schwartz Blue instead of black? That's they had that on the other one too I Didn't really notice that. But yeah. Blue with our black as the sense, two blacks as the sense. So interesting.

This one is another triple output power supply. Let's put this up. Cnge 100 By the way, if you want to ask the price on these, these are not like hobbyist power supplies. these are you know, professional quality system.

Power supply is designed and in for inspect for professional applications. So I believe this one is the Nge series is one of their lower cost ones. This one's I think starts from just like 990 bucks us I think it's like 1600 Australian I'll try and get some prices and put it up but yeah, isn't this sweet. Still weighs a decent amounts.

Nothing to tell you what the specs are. Ah, here we go: 0 to 32 volts, 0 to 3 amps, 33 watts on each Channel Nice That makes a very nice little compact bench power supply. I Really like that the stacking is not the same and they haven't got the same things on there but they do have the cutout. I think yep I think that's gonna made up with that on the top so it looks like you can stack those.

sweet. Curiously, this one does have USB on the front and that looks like a big ass fan on the top so that's interesting. but if you stack them it's not gonna it. Well it kind of affects the efficiency of the fan, but it's not going to block it because she goes.

still going to have like a decent clearance there with the feet on the bottom so it can still suck the air in, but it will affect the efficiency just a little bit. But I'm sure they've done the business. On that back panel we've got LAN and USB looks like that's standard and digital I/o Look at that 4 channel digital I/o so you can like do you know system control and stuff like that? These all these are power supplies are designed for you know, system integration and programming in side test racks and stuff like that. which is one of the things I used to do for a living and um yeah, having digital outputs like this is nice.

You can interface this to custom you know, relays, switching boxes that tests you know, loads and Dutt's in and out device under test, in and out and stuff like that. So yeah, that's really nice. We're verified it's 230 volts thank you very much. Let's pair it up.

and I love the compact nature of this and this is really nice as a or purpose small bench supply can hear the fan better turn off Alex Oh geez, it's taken a while to boot. the other one booted quicker than this. Oh no, no fail on the boot time Oh twiddle your thumbs There we go. What was that? I don't know.

agonizing 15 seconds but the fan switched off so we're going to have a software controlled fan so that's nice and slightly yeah. I can't see it turning. so I think it's completely switched off but there you go. I've got nice big once again a high-resolution dot matrix.

a higher resolution than we had before. this one's fancy pantsy color but it's not color coded like they could have. maybe you know I had no there it is orange, blue, yellow. I Would have liked put a big like made the big outline there orange and there big outline there like the whole background, the blue and the orange and the yellow or is it too gaudy? the yellow is too close to the orange for my liking.

I Would have chosen a different color there I'm not sure how that's going to show up on camera. Suman I've got my color balance nearly correct I haven't my lab lights just? I Bought some new lab lights and they weren't there a rated color temperature and they're really crap. So I've got like a mixed color temperature in here at the moment is really quite annoying. Orange in yellow? Hmm.

Okay, once again, I've got a knob in a face. I've got the output so you can turn the output on and then you can go Boop Like that. Okay, so that changes from white to green and boom boom. All right.

So what you've got to do now is there we go for T's channel 1 2 3 I know that works the same. Be nice if it came up with a different color but it doesn't like the other one but doesn't matter. still. Yep, we can jump and then we can by default the digit is different.

By default it was 0.1 volts before so that is significantly different. That works pretty well. That doesn't seem to be a velocity control on that. It looks like each indent and the night is nicely indented by the way.

and I guess the way you enter it is toom like that. Sweet. Well what's this? Press for live mode. Hold down for live mode.

What does that mean? Oh okay, there you go. That one has your velocity control. There you go. So if you press and hold on the channel like that, can you go to - what? Hang on.

Why is it drawing an amp? What? 13.6 watts? What? I Cuz that's the set. Okay, See, It should tell you that it's set. Surely that's the set current. Okay, so when you switch it off, it's show and it goes to white.

It shows you your set current. Okay. And when you go live like that, it shows, right? Okay, you know you have to get used to this sort of stuff. It's nothing inherently wrong with it.

There you go. in Live mode. We swap between them like that instead of choosing the channels up here. It's just different to what we had before.

But here we go. in a live mode. It goes 10 millivolts steps like that. With each ended an indent and it didn't change.

Indent didn't change. indent change. So it looks like it must be doing like 5. After that, you'd have to hook out like a higher-resolution voltmeter up to see that.

So every second step is 10 millivolts. Okay, so it's probably 5 millivolts per step. and so you go slowly. faster, faster faster.

Oh, that's a bit too fast for my liking. On the velocity control, look almost within how many count and count the resolutions as. I Turn these one to two like within two I Went from Try that again I'm a thumbs-up The top one resolution revolution - by the time I go around - I think it's through the full range. so I think that's it's nice that they have the velocity control that just seems too much I'd like at least like 10 turns at like 5 turns of my control before I went through the full range or something like that.

Yeah, that's just it's too quick of course. I am nitpicking about this. It's kind of. these aren't out very far.

Sort of hard to see if you have a look, you can just kind of. These don't come out very fake and just make out. these are big holes in there so you can just stick your wire under there I don't know. They're kind of not the best binding posts I've seen.

but yeah, they stick I don't know how they convey how far they stick out, but it's a long way. It's comically long. but of course you can put your big shrouded leads in there. That's the idea behind it.

so. but why you need that? Like the shrouded ones that deep for just a gent. Like a low voltage power supply like this. I Don't know.

Hold on to your hat. that's a Wi-Fi symbol. Oh, that's not touchscreen, is it? No, um, that's that's. like Wi-Fi It's probably got Wi-Fi built-in There's your digital.

I Oh, that's very nice. It's got your easy ramp as part of their ramping. Yeah, and as I said, part of the the programmability and stepping functionality of this supply, which is going to be very comprehensive if you go down the rabbit hole in that respect. And the menu.

Yep, there you go Wireless LAN And sweet I Don't know if that's standard I'll check on that, but yeah, we can set that up. Oh Option K 102 not installed. Oh no, you tease me with the wireless LAN option. Come on.

doesn't cost much to put wireless LAN in something, but all the manufacturers do it. Oh what's service? Certainly to access the service menu. Hmm. System test run, display test, buzzer test fantastic for those playing along at home.

shows the last calibration date. that's nice. Change the keypad, fall back, time the display brightness, buzzer sound I Wouldn't want the screen to be a bit brighter actually, so we'll whack that up. Yeah, there we go.

That's better. That's where your install your license year. Wireless LAN is just a licensed option. It's not a the call option and the digital I/o not installed either.

I Don't even get the ethernet. Ah mama, hey but I'm not complaining I got it for Nick So we go. Oh I miss that look you can photo button. You can hold that down and it's gonna presumably take a screen capture to your USB stick.

Oh nice. You know it's like handy for like documentation. It just looks neater than taking a photo of the screen. That's just nice, but that's what happens when you got a Linux II thingy.

Once again got our few Z's service that adds value. Rohde & Schwarz service support, training, calibration look. they look happy. Very consistent with their document menus.

or maybe we've got that one. The Big Joe be different type of styrofoam. Oh yeah, that's a nice looking slim bench. One two does take up a lot of floor area but in terms of like height and you can stack these, imagine having a big stack of these on your bench.

Ah, wouldn't you kill for that? Beautiful! Once again, we've got the a similar thing here I'm probably what we're probably going to do with this is we're gonna do a little board that has hopefully if we can get the distance that has two banana plugs and the binding post in the center of that so we can put one here, one here and then have one here, one here and all that compatible across the power supplies. Anyway, that's the HMP 2020 as opposed to the HMP forty forty. So there you go. Looks like it's the same width but sort of much.

weighs much less and it's a half there, almost half the height there. So oh nice. But of course if you're gonna have one on the bench or have this. but of course there's a big price difference between the four channel with the higher power and this one's only a two channel 188 watts.

So and we've got the same Ethernet USB interface that would be compatible across the devices and we've got the rear panel connections both Sense and power for the channels on the back of which the smaller Ng Ng E 100 series didn't have because it it's not really designed for like a rack integration and stuff like that. This is more something you that you plug in or rack and generally interacts. You don't want cables coming out the front, you generally want them all coming back and all the cabling and everything right at the back of the rack so it's a neat and tidy. it depends on what your needs are.

If you need to plug them in and out all the time then you know the front is more useful. but of course having the terminals on the back it all permanently wire that in so that's pretty sweet. So that's really what signifies a system power supply as opposed to a bench power supply as having the remote stuff on the back. But no, did you lie.

Oh, this time sitting in the design review meeting, how many vent holes do you think we need in this thing I just pepper the lot. She'll be right. but that actually raises the question of why I actually do that if you've got like yeah no that's that's like a Inlet that's yeah this heat sink there right? So you've got a fan on the other side which is sucking the air through like that, but you don't necessarily want it. Well, you might want it to come through the top and stuff like that.

but also this would help with radiation as well. So you know you get the radiant heat not being trapped in there, it's coming out. so that may mean that you can draw more power from it. and if you don't have anything blocking it on top, the heat can radiate out.

And of course they'd have temperature sensors in there to know when to turn on the fan and how much and all that sort of stuff. So if you've got some additional radiant holes on the top, then that might help turn your fan on at a higher power setting, so you know you might gain some advantage from that. And of course, this one will be exactly the same as the 40/40 but it's the 20 2002 32 volts 0 to a 5 amps. This channel though is 0-2 ten amps.

So yeah, that's a decent mix. I mean having a ten Am capable supply because my Rygel is only three amps. So many times have I come a guts with that and I've had to like parallel channels and there you can do that, but you know it's not terrific. I Believe that you can.

Well, this one's got. These supplies all have tracking capability I'm not sure if you can parallel them up like within like internally with the relays. I'll have to RTFM on that one. but yeah, this one.

Having a 10 amp channel like that. this one you can get of course in a in different models there's a three channel model or you know, having just the two channel one with a higher current on one channel I think is potentially more useful depends on your needs then like a three channel at like 3 amps or something like that. Having 10 amps is just really nice. And of course that one's going to work exactly the same.

So you can go voltage channel one or you can select channel two and then you can either tweak it like that. well you have to. Sorry, it doesn't have a keypad on this one. So yeah, no velocity control on there.

Does it have that live? No, it doesn't have the live mode that the Ng 100 series has by the looks of it. so if I hold that down, no, it doesn't seem to have it. So that's like an Nga series new feature. Anyway, the display on this is bright, very readable.

You know we do lose it like at the sides. a little bit like that, but it's actually really, really quite nice. You have it up on a rack and you're looking down like that. It's just sorry about the glare and stuff like that.

But yeah. really nice display. Yes, confirmed they do stack look at that. A little bit of play in that, but yeah, they're not gonna fall off.

So thank you very much Rohde Schwarz for sending in this bonanza of power supplies. It's just absolutely awesome. They took pity on the crap once I Had here in the lab and um, these are going to be incredibly useful no doubt. And they're worth every cent.

They are beautifully engineered. These are not cheap power supplies. I mean you know this one starts from, you know, in just under a thousand bucks. And these ones you know double or triple depending on the configuration.

They have lots of different configurations and options depending on what you want. Like this one as I said can have like three outputs and you can get and like this one. I think it's five, five and five amps. Or you can get the one with the ten amps plus the five amps so that we've got here and this beautiful four output one.

And as I said, I'm going to make some little adapters just to make these a little bit more usable because the binding posts are a very handy and it's a shame that they didn't Actually yeah and I provide those binding posts. but these as I said system power supplies and it could take me a month of Sundays to like do reviews on this. but if you want me to, do you know any video looking at specific stuff on these things I'm sure they're gonna do the business and meet their specs handsomely. Courser Rohde & Schwarz Kiya always does.

That's what you're paying for so these are absolutely brilliant and will be a great addition to level. Probably keep this one here because it's nice and like it's a nice smaller compact one probably on this bench here so they can you know permanently your power up stuff that I'm playing around when experimenting around with and stuff like that so that's going to be really handy. and there are nice performers the programmable stuff because we're working on the micro supply and and we may want to do some like you know some automated testing and other stuff. So yeah, we might have to get the the remote options for these and let us know if you want us to do some more.

playing around with some of the cool like you know, the sequencing and I think it can go down to? don't quote me on this like like 10 millisecond pulses and stuff like that it can do and all sorts of sequencing stuff and you know really powerful capabilities inside these things. It's hard to scratch the surface in any sort of review. you could do an hour-long review of just a simple power supply like this one with all its you know, even this is not really designed for automation, but it's got a lot of that automated you know sequence and other stuff of functionality in it. So Yeah is a fantastic.

Thank you very much Rohde & Schwarz! If you liked the video, please give it a big thumbs up. As always, you can discuss in comments down below or over on the Eevee blog forum and I'll link to these power supplies down below if you want to check them out. Catch you next time.