Co ax cable network and tv studios
I doubt this will be read,
But I'll put it here for posterity.
Oh Yes, used to love the 75 ohm / 50 ohm coax days of Ethernet,
And the great big 25mm diameter yellow cable with the self punching taps to fit ..
But funniest I had was with a TV studio,
yes they had decide to keep costs down and also use what they knew, they would use a coax Ethernet network.
Give them their due, they did start off with colored sleeves on every cable, to distinguish 50 ohm and 75 ohm, ( did not last long ..)
And I disagree with a comment above, 75 ohm and 50 ohm do have different size pins, especially on the big N type connectors. Yes its the plastic that gives the impedance, but they decided to use different pins for some crazy reason...
Then , one night had the dreaded call, time critical, program MUST go out, network un reliable,,,,
Stop gap managed to move the info over on mag tape, to the production machine, that yes , was having un reliable network.
In the light of day, went to look at the problem, all worked well.
that night ,
it went very un reliable again.
So did an all nighter, working through the problem.
changed cables, connectors, cable testers, re configured software, all seemed ok.
then , about 2 in the morning, it all started to work fantastical....
Ah must have been that cable I changed, but it did not feel right..
Next evening, down again... NOT best pleased studio manager...
DONT get on the wrong side of them, ever .....
This time I was ready,
I'd managed to not only borrow / steal a few more bits of kit, TDR , and a big scope, second computer, a test computer, and was all hooked up ready .
Oh yes, it was easy once I looked at the scope and saw the Video waveform on top of the Ethernet signals !!!!
Yes in those days, TV went off around mid night, and was not back on till Tea time,
When studio 5 turned its output to transmission, then hay presto, it injected video on to the Ethernet.
Traced it back to a miss placed video patch into the patch panel above of the ethernet.
Managed to get a nice job out of that, a re wiring so separate cabinets for video and Ethernet
which all had to be done in the day time, luxury.