https://ardent-tool.com/NIC/IBM_F-Coupler.html
Folks, I have looked for the mythical "F-Connector" that enables one to attach F-Connector video to an ICS Token-Ring MAU. I have never foundt
even -ONE-.
Can someone intelligent enough design a High pass filter, maybe 32MHz to infinity, that will allow us to use an 8228 [or similar] to transmit
both Token-Ring -AND- video?
value for the components.
Stop wearing sunglasses at night...
The patent has a lot of detail on the chokes used, how to run the wires through the six or so holes, a circuit schematic...
I've gone through it before. If you are curious, blue, I can extract the circuit and component values. The patent for the "Improved IBM
F-Coupler" is the one you wandt.
Electrical connector US 5293298 A Improved IBM F-Coupler https://www.google.com/patents/US5293298
https://ardent-tool.com/NIC/F-Coupler_Fig1.jpg
Shows "RF", now that I am injecting caffeine into my veins, yeah, sure
looks like the video portion is stripped out from the T/R and fed up to
a "TAP/COMBINER"
On 11/15/2021 20:42, Grant Taylor wrote:
value for the components.
Therefore, the F-coupler has three entry/exit ports with one port
providing attachment for baseband utilization devices, a second port providing attachment for broadband utilization devices and the third providing attachment to the network.
Must meditate.
On 11/16/2021 07:19, Louis Ohland wrote:
Stop wearing sunglasses at night...
The patent has a lot of detail on the chokes used, how to run the
wires through the six or so holes, a circuit schematic...
I've gone through it before. If you are curious, blue, I can extract
the circuit and component values. The patent for the "Improved IBM
F-Coupler" is the one you wandt.
Electrical connector US 5293298 A Improved IBM F-Coupler
https://www.google.com/patents/US5293298
https://ardent-tool.com/NIC/F-Coupler_Fig1.jpg
Shows "RF", now that I am injecting caffeine into my veins, yeah, sure
looks like the video portion is stripped out from the T/R and fed up
to a "TAP/COMBINER"
On 11/15/2021 20:42, Grant Taylor wrote:
value for the components.
There is NO separate "RF" circuit.
On 11/16/21 8:10 AM, Louis Ohland wrote:
There is NO separate "RF" circuit.I'll say it this way. The RF is super-imposed on the twisted pair
that's used to carry the baseband signal. Thus the baseband and RF (broadband) use the same horizontal wire from the wiring closet to the workstation outlet.
The RF and baseband are two separate logical networks that happen to
share a cable segment via the F-Couplers. Baseband data (Token Ring)
goes one to one set of equipment while RF (broadband) goes to a
different set of equipment. The only common parts of the cable plant
are the F-Couplers and the twisted pair wire in between.
At the workstation end, the typical ICS cable will come out of the
F-Coupler and go to the Token Ring workstation and standard coax will
come out of the F-Coupler and go to the TV (or other RF using
equipment). In the wiring closet, the typical ICS cable will come out
of the F-Coupler and got to a MAU and standard coax will come out of the F-Coupler and go to the standard RF equipment; coax splitter,
distribution equipment, etc.
--
Grant. . . .
unix || die
On 11/21/21 1:12 AM, Kevin Moonlight wrote:
I have some odd token-ring type adapters that have been floating aroundI think that both 10Base2 and 10Base5 have some fairly hard requirements
my desk for decades now and never quite knew what they were, I assumed
they were for re-using token-ring building wiring for 10base2 ethernet
or something along those lines.
on the cable / RF distance the card can be from the common bus. As such
I'm fairly certain that you couldn't have very much cable at all between
the coax bus and the transceiver.
Remember, 10Base5 had taps with active electronics directly next to ~>
on the coax bus and then completely separate AUI connection using
completely different technology on a service drop cable.
So, no, I'd bet lunch that you couldn't run 10Base2 over the adapters
that you have.
Aside: You /might/ be able to use two of them back to back as a part of
the larger 10Base2 bus, but not the lobes.
I cannot remember where it came from, but the highschool I attendedInteresting.
in the 90's was an IBM case study of sorts as I was told at the time
and it was excessively wired up with token-ring, and also had a
television in every room linked back to a fully equipped studio that
was used for live news broadcast style video morning announcements... I wonder if it used this system to share the wiring.
https://imgur.com/a/hoFZpwN
That's a BNC, not an F connector.
It also doesn't seem to have any data cable connected to it. Is it
supposed to be there? Or are the adapters that you have specifically
meant to re-use / abuse the horizontal in-wall cable explicitly for the signal going over the BNC connector?
My assumption of the F-Coupler was that it could be used at the same
time as Token Ring data connections.
--
Grant. . . .
unix || die
I have some odd token-ring type adapters that have been floating around
my desk for decades now and never quite knew what they were, I assumed
they were for re-using token-ring building wiring for 10base2 ethernet
or something along those lines.
I cannot remember where it came from, but the highschool I attended
in the 90's was an IBM case study of sorts as I was told at the time
and it was excessively wired up with token-ring, and also had a
television in every room linked back to a fully equipped studio that
was used for live news broadcast style video morning announcements... I wonder if it used this system to share the wiring.
https://imgur.com/a/hoFZpwN
Sysop: | Keyop |
---|---|
Location: | Huddersfield, West Yorkshire, UK |
Users: | 295 |
Nodes: | 16 (2 / 14) |
Uptime: | 00:18:19 |
Calls: | 6,642 |
Calls today: | 2 |
Files: | 12,190 |
Messages: | 5,325,357 |