Reddit reviews J-Tech Digital Premium Quality SDI Splitter 1x4 Supports SD-SDI, HD-SDI, 3G-SDI up to 1320 Ft (1 Input and 4 outputs)
We found 1 Reddit comments about J-Tech Digital Premium Quality SDI Splitter 1x4 Supports SD-SDI, HD-SDI, 3G-SDI up to 1320 Ft (1 Input and 4 outputs). Here are the top ones, ranked by their Reddit score.
Support SD-SDI(270Mbps), HD-SDI(1.485Gbps) and 3G-SDI(2.97Gbps) and distribute to 4 simultanous SDI outputsWith SDI repeater function, providing equalized and re-cloked transmission,and supporting signal input and output distances of up to 1320 ft for SD-SDI signal, 660 ft for HD-SDI signal and 330 ft for 3G-SDI signal by Belden 1694A cableWide voltage design, can support DC 5V~30V voltage input (lowest power is 5V), more suitable for projectsIntelligent design, plug and play, can detect SDI signal automaticallyPlug & Play; Durable metal enclosure; Free lifetime technical support and one-year warranty by J-Tech Digital!
If you only have one source, then you don't need a matrix switcher but I do recommend getting a switcher so you can switch to logo when you change presentations or video so the audience doesn't see the desktop or you launching the file. Also, having a switcher will allow you to add more computers if need be.
What you need is a solution for your long video runs and a way to distribute that signal.
The cheapest route would be to use 75ohm Coaxial Cable with BNC connectors but we'll call that HD-SDI cable for short.
So what you're going to need is:
[SDI to HDMI converter] (https://www.bhphotovideo.com/c/product/1375619-REG/blackmagic_design_convcmic_sh_micro_converter_sdi.html)
[HDMI to SDI converter] (https://www.bhphotovideo.com/c/product/1375618-REG/blackmagic_design_convcmic_hs_micro_converter_hdmi_to.html)
[SDI Distribution Amplifier] (https://www.amazon.com/J-Tech-Digital-Premium-Splitter-supports/dp/B015ET5VWI/ref=sxin_2_ac_d_rm?ac_md=0-0-c2RpIHNwbGl0dGVy-ac_d_rm&crid=1O6MZKDQNYYUJ&keywords=sdi+splitter&pd_rd_i=B015ET5VWI&pd_rd_r=6ed42a76-e3f1-4d51-bfca-9997666160c6&pd_rd_w=iVX96&pd_rd_wg=1FPMT&pf_rd_p=2938a786-9bec-4d37-8c06-456e3edce5d1&pf_rd_r=FEPD27FDME5QGXJ044CC&psc=1&qid=1572314404&sprefix=sdi+s%2Caps%2C198)
HD-SDI Cable
BNC Couplers
You can only couple HD-SDI two times before you lose signal. Also, HD-SDI is good for up to 300 feet so I suggest getting some 1x2 SDI Distribution Amplifiers and put them inline at 300ft if you need a cable run longer than 300ft.
Also, the converters I linked to don't include power supplies. You can buy them with power supplies but it's cheaper if you buy some generic power supplies and Micro USB cables. Also, if the TVs have USB ports, you can power the converters off the TV so you don't need power supplies for those.
The HD-SDI cable is probably going to be a few hundred dollars. The couplers are cheap.