HDMI TX RX camera to monitor.

[Chris Tangey]

Just a quick update, have received the Nyrius aries pro kit today and have completed some basic testing.

First impression is very good, although both the transmitter and receiver ends get quite warm so am a little worried in our desert environment, too late to really check as the hot weather has now gone for 6 months. Tested line of sight for 50 metres, no problems. You will get an image through several walls, but not a good one. If you are within 10 metres, regardless of walls you can expect perfectly clear 1080. Am still awaiting the 20000mah phone batteries from Hong Kong to power both ends remotely, but maybe I don't need them. Preliminary tests today on the transmitter indicated I should be able to run at least that end for about 4 hours on a 6000mah battery pack. Anyway I'm hoping the rest arrives in the next day or so as I'm on a shoot in the desert all next week so it will be quite a while before I get back to you all otherwise!

[Chris Tangey]

Forgot to mention Chris, the Nyrius Pro I just bought appears to be, in every respect, the same product as the IDX but about a quarter the price.

Originally Posted by Chris Medico

This should do it.

IDX CW-1 Wireless HDMI Video Transmission System CW-1 B&H Photo

[Rich Greb]

We’ll have Paralinx, IDX and Teradek wireless HDMI sets (with battery solutions) working on various cams at our NAB booth C11143.

Rich Greb
CMR

[Chris Tangey]

In terms of price, probably talking apples and oranges though, Rich.

My intention here is just to put together a budget solution for those of us who will only need this capability every now and then. When using monitors on camera and on jib, I'll be using HDMI cable. When working with a Director, which is usually only a couple of times a year (as I usually shoot and direct myself), I will use the wireless system.

Just had a look back at the costs and if you take out the freight, this system, including high capacity batteries, will only cost me $227! According to a discussion on Blackmagic forum the Nyrius unit is almost identical to the Paralinx, including similar, if not the same, Amimon chipsets. I think the big difference is that the Nyrius won't work on more than one receiver simultaneously, but I don't need that anyway.

[Chris Tangey]

Apologies for those still waiting for me to come up with "the "rig". It's been one of those "plans of mice and men" moments and as I live in small town with limited access to specialist technical bits, and have been busy, makes it hard for me to complete this. The problem is a simple cable for the receiver end to power it, as that is not supplied as they presume you are not going to be running it portable, but through AC.

The transmitter runs fine off the portable battery with power into the mini USB port, however even though the receiver also has a mini USB-in it won't accept power there to run it. It will only accept power through the DC-in port, so I need a short USB to centre pin positive barrel connector to make it work. Trouble is I need to find the right one, I even bought a whole interchangeable-end phone charger yesterday but NONE of the DC ends fitted, although I know they exist. I am now just trudging through the last chances I have in town of finding such a thing when I get a chance, ordering it online also seems out of the question as I have to know exactly what the end is called and its exact inside and outside measurement, as well as making sure it is centre-positive. So maybe don't hold your breath, what a shame such a little thing can trip us over.

[Chris Tangey]

OK guys sorry about all that, but I now have a functioning set-up for transmitting HDMI from camera to monitor/TV/ or whatever will receive HDMI. I must stress that this is just for function not form/ergonomics.
I will of course be thinking long and hard on how to make the monitor end tidier, easier to carry and pulling back in the protrusions.

I have got to say I am astonished at the transmission range. Early tests showed about 50 metres, but I found it was getting drop outs due to poor HDMI cables and looseish power connections.
After working through those this morning I walked from the house to the back fence on our rural block until I could go no further. It was still putting out a very solid signal at 98 metres! Actually I was sure I would lose it out there as there are several light trees in the way and I had to walk down and through a large drain but it still didn't drop out. Please see photos for how it all currently connects, got the USB power cables made up at the local Jaycar (like a Radioshack) in the end.

[Giroud Francois]

i had no time to make more test with the nyrius, so possibly you already got the answer.
Does the nyrius set requires a particular postion of emitter and receiver, in order to get the best range ?
I know the emitter has the antenna at the end of the usb stick and i see many examples where the stick is mounted vertically. there is few example showing how the receiver is oriented.
I have not been able to find a graph showing how MIMO antenna radiates.

[Chris Tangey]

Giroud,

I presume the transmitter is optimized to operate vertically as it would seem very silly to require it to stick out horizontally. Your question is a good one, and I also haven't have time to play with that side of it. Of course like all such things it is generally line of sight so I try to have the transmitter side of the camera (in my case the side the HDMI port is) in line with wherever the transmitter is. The further the distance the more important that is. When I do get time to experiment I will let you know. By the way, the reason I have the receiver mounted out is partially about getting better reception, but also to help dissipate the substantial heat it produces.

Bottom line for my purposes is that 99% of the time the Director will be within 10 metres of me anyway, so I am not really too fussed by long distance issues.

[Charles Papert]

Silly it may seem, Chris, the system will work best if the transmitter and receiver are oriented flat, horizontal and pointing towards each other (the ends opposite the HDMI connector being the antenna ends). A couple of your countrymen discuss this issue in a recent video, where they mention the antenna orientation that Dan from Paralinx told me about.

Also, to address another "presumption", this from Chris Medico earlier in this thread, while there are a number of similar looking units out there, yes they all use the Amimon chipset but that doesn't make them all perform identically (Paralinx specs different antennaes than the Nyrius and has dynamic frequency selection, for instance). I used the first gen Amimon products intensively, and know firsthand from owning both that the Boxx Meridien way outperformed the IDX Camwave, although they too had the same chipset.

[Chris Tangey]

Charles, good to hear from you as always. I really don't know enough about the physics involved in having to choose between horizontal and vertical antenna polarization on a given device. All I will say is that even vertically mounted I was astonished at the range, and as I will almost always be working way below that range it is probably something I won't have to give much thought to in future.

Bottom line is it is all very well for me to go for a walk in the park with it, but I really won't know good, bad or indifferent this set-up is until I actually use it on a job. Still, in terms of bang for buck I doubt I will do much better. By the way I made a typo early on in this thread saying the whole TX/RX rig set up would only cost me $227 ex-freight, actually with the battery packs from Hong Kong and the two leads I had made up it has cost $327. Still, way less than all the others.