Hey MTV, welcome to my crib. Oh, I mean, sorry, prong video. Hey Flow Play, this is Jake here in the lab, and today
I'm doing a deep dive on our new Raymond EMC supplied RF chamber. Raymond EMC, these guys huge shout out once again
They provided this whole thing for us, and they were a huge help with getting some of the equipment that we need
And getting everything started. So without further ado
The most satisfying door in this place
This is the Raymond EMC quiet door, and I know Linus showed this off before
But this is a knife edge that goes into some brilliant copper finger stock
And I've seen a lot of people asking questions around, you know
What's the maintenance like on on this kind of thing? Especially because we reference that one of the screws is actually out of torque and that caused a leakage at 18 gigahertz
So with this we actually have a duty cycle
Every hundred times this door is open and closed. We've got to wipe all the contact surfaces around the outside
Every thousand cycles we have to inspect and lubricate all the moving parts and every 5,000 cycles
We actually have to polish all the contact surfaces and check the door alignment
Raymond EMC is actually we coming back out to film a maintenance video for this that they'll have on their channel and
To do this basically we use methyl spirits and a brillo pad. So it's nothing too crazy
But it does present a bit of a challenge for Height challenged individuals like Linus to get up to the top of the door
so Another thing that people have been asking is, you know, what are we doing with the electromagnetic interference and EMI off the cameras?
Etc. And even the lighting so one thing we're not going to be filming the tests
We will film recreations afterwards, but we're going to use the actual clean test data. So with the lighting
EMI is actually a big consideration. Thankfully Constellation lighting down in the States. They make these link
LED systems and these are mil spec
So they're military standard 461g tested for zero EMI emission
They're 65 watt 7,000 lumen and we can actually position on two axes so we can kind of adjust lighting in here
That makes it a lot easier to see because when the lights are out and the doors close
It doesn't work so well Over here, these are our negatives for our floor panels. They're actually
Really stable. So we're gonna have our test set up over here. We're gonna be broadcasting on our fire cell
Lab kit that's gonna send signal over in that direction
And we're gonna have our device under test on a pedestal there. Ignore the big blue box. It will not exist and we're all ready
effectively One of the considerations that we have when we're broadcasting
RF is that we can't broadcast too close to the device under test and we can't broadcast it to a high of a power rating
Mainly because you can actually burn out equipment that way So with the lab kit, we're gonna have it positioned about a meter off the wall
And we're gonna have the device under test But the same and the reason for that is if your wavelength is too long so too low of a frequency
If you're too close, it can cause weirdness
They don't call RF black magic for nothing. So we're gonna have it positioned off the wall
We're gonna have about three to four meters in between
And then we'll be able to measure different transmission power levels
I know for for your people Arjun, and I'm gonna say that
in Australia
In Australia these LTE band 28 which is 700 megahertz. It's a fairly low band
And we've had a couple people ask if we're gonna include them testing
I am gonna go through every LTE frequency band. So there will be data on that. Oh, yeah
And one of the really cool things to consider is okay. Well, if you're on a network that's utilizing a
Lower end of the frequency spectrum. You can actually get away with smaller batteries
Just for the simple fact that doesn't draw as much power
So yeah, we're we're gonna be doing some really cool tests on that
I'm meeting with some reps from a couple of the different manufacturers of the spectrum analyzers
So we're looking into Possibly a rodent Schwartz like an FSW 43 or maybe one of the Gauss
One of the G line probably But basically we need a 43 gigahertz spectrum analyzer and that's gonna come down to you know cost
line ass or
In general ease of use, right? I want to get everything running as quickly as possible
So we're gonna try and hit the ground running once everything comes in
In the meantime before we get that though, we do have our lab kit fire cell. It has arrived
It's actually outside if you guys want to go
So I know it doesn't look like much but in these three boxes here, we actually have our 5g and
Our 4g radio as well as the actual main compute unit
These are are really cool These are
this is the actual
Network broadcasts or the SDR. So this is the edis research. It's a usrp b210
So it's 70 megahertz to six gigahertz
Right now. We can't do millimeter wave That upgrade is coming out early next year
In the meantime, however, this is gonna get us kind of 80% of the way there
So we've got our 5g. We have our 4g in here. So we're getting the upgraded millimeter wave 5g
Early next year for our lab kit. We might actually add some equipment in the meantime that will kind of bridge that
I'm actually talking to to one of our viewers. Hopefully next week
Who is in this space and and has some advice for us?
So we're gonna listen and make sure that you know, we're not barking up the wrong tree
and then outside of that You know, this is running our network, but we also need to you know
Have something in there to record tests. So for that, we went with this sira7. It's a completely silent fanless
solid-state PC. It's totally passively cooled
You can tell because it's basically a giant aluminium heatsink
And the reason we went with a solid-state PC is just because there's no fans and fans can generate EMI
So we want to try and minimize that as much as possible. So that's why we wanted that
It's a decent little AMD Ryzen 5. It's a 5000 series
CPU in there Nothing crazy, but we don't really need anything too high spec. So yeah
The other really cool thing is about how we get our network inside the box because obviously can't use wi-fi
And it's this wave guide now one of the really really interesting things with this
Is that this is actually a plug And you notice it has this really really handy late warning label
saying Tempest hazard with plug removed
Now for those of you that don't know what a tempest attack is
It's effectively a way to use rf to eavesdrop on displays. It's really cool
It's not new But there's not really a huge amount of people kind of in the public space that talk about it
Effectively you could be in another room or on the other side of a hotel wall
Broadcast a signal and you can pick up what's going on
On a display and you can set one of these attacks up for like 300 to 400 dollars
If you plus a laptop So one of the things that I really want to do
Possibly for a flow plane exclusive. We'll see is actually run a tempest attack online us in the chamber
Come on we can leak the stream keys again. We can we can find out his emails. We you know everything
It'll be great his life easier, right? So yeah, so if that plug is removed
Boom, it's wide open Yeah, so I think that'll be pretty cool
And finally one of the things that I've seen quite a few people ask is
You know if one screw or bolt out of torque can cause a leak
You know how a how do we maintain that? Um and b why didn't we just weld everything together? Well, these chambers are actually designed to be modular
We can extend this if we need to say we want to
Turn it into a three meter chamber and do full iso compliance tests
We can do that. We get raymond emc to come back out
We re-level this area of the floor and they can extend this as much as we want
So it's designed to be modular and then
Secondly as far as testing to make sure that you know everything's within spec that comes down to the duty cycle
When we're inspecting any of the moving parts and things And we can actually do signal generator
Via spectrum analyzer tests so we can have it broadcasting inside and we can go around and we can measure the outside
It's not something we're going to have to do often But we'll probably end up doing it probably once every four to six months
Just to make sure everything's working well I might even do a spot check once a month
Just in a couple different places mainly around like the moving parts make sure the door has good contact
Near the electrical maybe but yeah, it's not really a huge concern
But thank you guys for bringing it up Now traditionally a lot of the foam in here would be held on by adhesive
It's a bit of a pain Not just installed but you know someone falls against the foam or tip breaks off and you want to replace it
So tdk came up with something really cool
Their magnets we can actually pull off these panels if we wanted to introduce reflection
So if we wanted to you know get the signal bouncing real good in here
Take off a row of these and yeah, you can introduce some really interesting artifacts
If we need to replace them, we just unscrew the magnets at the back put the new foam
And pop it back in so yeah, it's a it's a really ingenious
Installation process and it makes life a lot easier to maintain. That's so satisfying. Yeah
the only the big pain in the ass with that though
Was that When the electrician was on the roof wiring everything up
The thud of him knocked one of these panels
Up here off right
Well, I'm six three
And I can't reach yeah, and I can't put a ladder in here. Yeah
So, uh, yeah unless it completely falls off you can't no it did. Oh, I did fall. Okay. Okay. It's stuck
Oh, I guess you still can't be into the answer. Yeah. Yeah, I had to grab a broom
and I had to grab a mop like a
One of the mobs that has like the removable
She or like cloth over it and I had to use two of those to like push it back up onto the ceiling