Representing coax cable in Multisim

I am trying to simulate a 50 ft coax cable connected to a signal generator on the left-hand side and a 50 ohm load on the right-hand side. How would I build this using Multisim?

Hi,
The best option for you is to model the coax line as a 50ohm lossless transmission line and just calculate the delay it will introduce in second. You can use the following formula:
delay time = length of the cable/ TEM velocity (3*10^8m/s)
If you want to include losses you have to calculate the RLCG parameters of the coax cable and include them in the component Lossy Transmission Line.
You can learn more about this here.
I attached a design file that includes these components, always make sure that your load is the same as the transmission line characteristic impedance (matched) to avoid reflection.
Hope this helps,
Mahmoud W
National Instruments
Attachments:
coaxial TL.ms11 ‏113 KB

Similar Messages

Can I connect a second router to the coax cable.

In my house Verizon fios goes into a box and a coax cable comes out and splits in one direction towards a set top box and in another direction to an Actiontec M1424WR router. An eithernet cable connects the router to a computer. All is well. This works fine.
Now I want to install another computer next to the TV. It sits a long way from the Actiontec, wireless is flakey and i dread the idea of pulling a long cat5 cable through my attic to connect the computer to the Actiontec?
Will it work if I put a splitter on the end of the coax in the room with the tv, run one wire to the stb, and the other to a new router?
Solved!
Go to Solution.

Not a second router ... you want to go to your favorite online retailer (like Amazon.com) and purchase an ActionTEC ECB2200 (also called an HME2200) MoCA Ethernet Adapter. Plug and play and you're all set -- it will automatically link up over the Coax to your ActionTEC router and provide a LAN connection at the second location for you.
You can search the forums for the ECB2200 / HME2200 and you'll find numerous discussions on this device.
I use this in my home network setup and it works great.

My FIOS TV only uses the Coax cable not the HDMI cable

I can only get my STB to use the coax cable to my TV, I want it to use the HDMI cable for a better HD picture, but I do not see a way to get the STB to use the HDMI cable as the primary output. How do I tell my STB to use the HDMI cable instead of the coax? My STB is Model:QIP7100-P2.

Please look at My Images
EQUIP LAYOUT WITH WCB3000N Ntwrk Extender 12 28 2014.jpg
Have been using HDMI input (to my Sony)...with QIP 7100 P1 ...successfully for years
Tom
Freedom Essentials, QIP 7100 1,Bose SOLO TV Sound System,,QIP 7216 P2,M1424WR Rev F, iPad 2 WiFi,iPhone 5,TV SYST INFO Release 1.9.5 Build No. 17.45
Data Object 39.45

What digital coax cable do I need for my sb 5.1 digital (pic attach

http://www.marctv.de/media/soundblaster5rear.jpg
This is my SB Li've! 5. from the back. The black whole is labeled "or digital" .
I have my Z-680 ( 5. Surround Speakers with DD Decoder) attached with 3 x 3.5 mm to have real 5. Sound in EAX Games.
But I want to connect the soundcard with my decoder via the digital coax cable because I do not play anymore.
So what cable do I need to connect my sb 5. digital to my z-680 via coax?
I need a detailed discription so that I can buy one.
And yes, I know that I only have stereo sound when I am not listinbg to a dvd.
But please give me the answer. I could not find it anywhere on the cl homepage.
Is it a 3.5 mm mono to coax? Or what is it's

Yes it's a mono 3.5mm >> RCA adapter (or a stereo 3.5mm >> 2xRCA cable). You need to use the orange socket labelled 'DIGITAL OUT'.

1310 Bridge RG-59 coax cables.

Hello all, hope everyone is well.
The RG-59 coax cables that come with the 1310 bridge are only 1 foot long. Does anyone know where I could get longer cables as the power injector is quite a distance away because there are no close power sockets. Instead of installing new power sockets near to the bridge, we wanted to simply run longer coax cables.
Hope someone can help!

This cable is standard CATV (cable/dish antenna cable) type RG-6 that is commonly available at any radio or entertainment store - It is exactly the same cable that is used to go from the cable TV receiver to the television - Raw cable and connectors are available from places like Home Depot, Lowes, Walmart etc.
Fred

1 coax cable - 2 different routers through splitter - 2 different IP addresses -- Possible?

Hello,
I currently have a verizon fios internet connection shared with my family through phones/laptops/desktops/etc. I am also starting a home business which requires constant internet usage and because of this I want a seperate line.
The wiring in my house is a bit weird so I was recommended by a friend to try an alternative method.
So, I'm wondering if the following is possible:
Currently, there is 1 coax running from the basement verizon box up to the second floor to a router. What I would essentially do is have a coax splitter at the second floor which feeds in to the two routers and each having their own verizon account associated with them. One router would have its own IP address for the family and one would be for my business with its own IP address. Seeing how coax has many frequencies, this should be possible but the billing department told me that I would need a second coax cable for a second router. This kind of ruins things completely.
So, I may have just explained it wrong to the representitive on the phone so I'm wondering if this is possible.
TL;DR Is it possible to have 1 coax cable which has a splitter which then feeds into two routers on two different verizon accounts with two different IP addresses.
Thank You.

lirik wrote:
Hello,
I currently have a verizon fios internet connection shared with my family through phones/laptops/desktops/etc. I am also starting a home business which requires constant internet usage and because of this I want a seperate line.
Thank You.
Do you only want the separate line so as to not have the other traffic or do you want it so that you have a different ip address?
You can get a business fios account, that will give you 5 ip addresses.
You can run a second router off your first router and give it a different subnet that is unique for your business traffic.

Melted Coax cable, Hot to touch 2 way splitter

I lost all my services (TV and Internet) yesterday. When I checked the splitter in the basement it was too hot to touch and the end of the supply coax cable was melting. The service contact's response was , WOW that's not suposed to happen. Hopefully the tech's can repair today. Any ideas what caused this and can it be prevented?

Make sure the ONT is properly grounded. It sounds like a shorted device or coax somewhere. Something should have taken out a safety before a coax "melted" The tech will need to troubleshoot this issue. Anything less would just be an assumption.
If it were my house I would unplug the ONT power and disconnect the battery. Please consult tech support prior to doing this.

Connecting the coax cable (from the wall) to my tv instead of box?

I was told this:
Though I though in order for the set top box to work you need the coax plugged into the box?
Please wait for a Samsung Agent to respond.
Please wait for a Samsung Agent to respond.
You are now chatting with 'Danice'. There will be a brief survey at the end of our chat to share feedback on my performance today.
{edited for privacy}
Danice: Hi, thank you for reaching out to Samsung technical support. How may I assist you?
David: Hi the UN40F6400AFXZA tv how do I use the tv function? I have the HDMI cable in the tv to the set top box but when I hit the tv option on source using my remote all I get is "white snow"?
Danice: I would be happy to assist you with the instructions to change the source on the TV.
Danice: What are the devices connected to the TV?
David: no I think you mis understand me.
David: Hi the UN40F6400AFXZA tv how do I use the tv function? I have the HDMI cable in the tv to the set top box but when I hit the tv option on source using my remote all I get is "white snow"?
David: am I talking to a robot or a real person?
Danice: I am sorry for the confusion.
Danice: You are chatting with a Live Person.
Danice: I would be happy to assist you with the information about the TV source on the TV.
David: ok
Danice: The TV source on the TV is nothing but the cable from the wall or antenna connected to the coaxial port on the TV.
Danice: You should connect an antenna or cable from the wall to this port and perform the auto programming through Menu options to get the display.
David: oh the cable from the wall goes to the cable box though?
Danice: No, this port is only for the cable from the wall directly to the coaxial port on the TV.
David: I'm confused cause my cable provider says the cable from the wall goes into the coax on the set top box? So how would the set top box work without the coax plugged in?
Danice: I will clarify that for you.
Danice: The Coaxial port on the TV will work only for the air channels like Antenna or cable from the wall and this is not applicable for the cable by the service provider you are referring to.
David: ok
David: also my other question is UN40F6400AFXZA dose it support Audio Return HDMI?
Danice: I will check that for you.
Danice: Yes, the HDMI 2 is the ARC port on the TV.
David: awesome how do I set it up?
Danice: Yes, follow the instructions mentioned in the link below to use the ARC feature:
Danice: http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx=469179&modelname=UN4...
Danice: Are you able to access the link?
David: yes thank you

The Verizon signal is delivered via coas to the set-top box which allows you to get all of the channels you subscribe to. You then hook the STB your TV (recommended via HDMI in your case since you have an HD set with HDMI inputs). The coax signal must be supplied to both your STB and your router.
If you plug your coax directly into you TV and do a channel scan, you will only recieve local channels (and a couple of others) because all other channels are encrypted and require an STB (or a cable card with an appropriate device) to decode.

Broken coax cable from circuit board to Airport Extreme

I picked up this 1.25Ghz-DP/1024MB/FW800 off the internet knowing that it did not come with either the Airport Extreme or the Bluetooth (1.1) module. No big deal, since I have an AE and would be looking for the BT Module. To my surprise, its "AE/Bluetooth-ready" status was compromised by the removal of the AE card using a pair of side cutters (or some other crude cutting tool), leaving a frizzy antenna cable running back down into the space between the chassis and the case. It would appear that the BT antenna is intact, for what it is worth.
I know there would be some challenges, but I am wondering if the part is available that includes the circuit board, the antenna, and the antenna coax leading from the circuit board back to the connector on the AE. Or maybe the part numbers?
I plan to use this for an older version Digidesign's Pro Tools, so I am going to remove the two four-port cards (one FW, one USB) and replace them with the PT Mix Core and Farm(s). I would prefer not to go with the USB dongle, since I know there can be flakiness with USB and PT. My alternative to taking the plunge with a soldering iron and some parts would be to get an AEBS nearby and connecting with ethernet.
The computer sees the card in System profiler, but without the antenna fully deployed, it fires blanks. Are the resources for the connector and cable that could be put together to paste it back in place or better yet, a place to get the complete unit to change it out. I guess I would be looking for the BT module, too as long as I am at it, but that is not a critical issue.
Thanks---Dave Iverson

Hi Dave,
Here is a third-party external extension antenna that might replace the existing stub:
http://www.macwireless.com/html/products/antennas_boosters/whips.php
Installation in a G4 mini-tower is easy; you only need to remove a PCI slot cover on the back to run the cable outside the box. I have no personal experience with this; just something I found in searching after I read your post.
Danny,
Welcome to Apple Discussions!
Looks like the above product should work for an iMac. Check the list of instructions on the page I linked to see if they list your computer. I suspect you have to take something apart to run the cable. Also check the iMac G5 forums to see if someone there has already figured it out for that model. The iMac G5 hardware is nothing like the G4 mini-towers that are the subject of this forum area, so your chances of getting the right answer for your specific computer are better in the other forum I linked.
If you are having trouble figuring out how to start your own thread (so many people do that I must ask), see this Apple info:
http://discussions.apple.com/ann.jspa?annID=650
Allan

Wireless Signal Weak - Tap into Outside Box Coax Cable and Convert to RJ45 Somehow?

Garage PC is too far away from Verizon Wireless Router MI424WR.
The cable from the underground comes in at the garage and is tantalizingly close!
Can a 75 ohm video type splitter be installed at the garage and some sort of converter box be installed at that point to convert the signal and provide a hardwire connection to the network card in the garage PC?
If possible, does Verizon have this converter for a reasonable cost or can you recommend an alternative?
Can an extra STB from Verizon be installed and use the "ETHERNET" RJ45 connector on the rear panel?

GaragePC wrote:
The cable from the underground comes in at the garage and is tantalizingly close!
The underground cable is fiber. You can't tap into that.
GaragePC wrote:
Can a 75 ohm video type splitter be installed at the garage and some sort of converter box be installed at that point to convert the signal and provide a hardwire connection to the network card in the garage PC?
Yes. You can tap into the coax coming out of the ONT and use a MOCA bridge to provide an ethernet connection in the garage.
See the following FAQ:
Can I get an ethernet connection in a room with only coax
GaragePC wrote:
If possible, does Verizon have this converter for a reasonable cost or can you recommend an alternative?
VZ does not sell MOCA bridges. See the above FAQ for sources of MOCA bridges.
GaragePC wrote:
Can an extra STB from Verizon be installed and use the "ETHERNET" RJ45 connector on the rear panel?
No. The RJ45 connection on the STB is not active.

Coax cables and splitters

I have a two story home and I'm changing the configuration of my fios service (tv & internet) My cabling now comes in to a 4 way splitter (Internet & 3 TV's). I need to change the configuration to be the main coming in to a two way splitter (1 tv & Rest of system) and then a three way (internet and 2 TV's) I need to know what size splitters I need (?? mhz) and if there will be an issue of a two way going to a three way. Thanks for your help

At a minimum use splitters that can handle up to 1 GHZ. Better to pay a couple bucks more for those that can handle up to 2 GHZ, as the three way will need that kind of support.

Whats the speed of connecting wan ethernet and coax cable

I have fios internet with phone no tv added and the guy came over and installed cat 6 to the router instead of coax, is the wan ethernet faster for downloads files rather than wan coax??? my plan package is the 15/5 mbps

Actually the MoCA is 1.0, I believe ... so it's probably topping out at 175mbps, but as you said ... both ethernet @ 100mb and MoCa at 175mbs are both an order of magnitude faster than the 15mb downstream rate the OP is provisioned for. So it doesn't matter how they provisioned the connection.

Length of coax vs. network cable as function of performance

i have a few cisco 1310G (with built in antennas)
choice 1:
100ft coax cable from the AP to the injector and a 25ft of network cable from the injector to the switch
OR
choice 2:
50ft coax from the AP to the injector and a 75ft of network cable from the injector to the switch,
which would give a better performance?
i know coax is a faster medium as its a thicker cable with less resistance but i am not sure how much noise it has vs a cat6 cable.
i am not using the cisco brand coax - i am using some cable guy who custom makes them.

Definitively is recommended to have an smaller coax cable.
Remember that Wireless cabe will start being affected not only from the antenna to the unit, but from the power injector to the antenna itselft.
The cat5 or cat6 cable can handle that lenght.
It is better if the power injector transmit in a shot coax cable. better wireless performance.

VMS & IPC Low MOCA speeds Check your COAX!

To much load on the COAX? Two 4-way by directional splitters and the router sits on the first splitter.
Make sure in is in and out is out.
Quantum TV ROCKs! Now that I removed the sand.
Enable Client Ethernet option with hopes they built it with Gigabit!
System Log
LAN Coax
LAN Coax Link Low Rate <TX 89Mbps/RX 113Mbps>
Actiontec issues, did not see this prior to Quantum TV?
Why does the router report this if the Ethernet is supporting the computers at Gigabit, and MOCA LAN is supporting the IPC Clients?
The clients should not care at this MOCA speed?
Does it matter that the LAN is running slow, since the MOCA WAN and LAN are at a different frequencies, and MOCA WAN not used with Ethernet WAN configurations?
Or would this too cause a bottle neck on the bridge, because with Gigabit LAN it should not?
Come on Verizon get a router with MOCA 2.0 and decent Wifi!
All VMS and IPC devices report a good SNR. Is this only an issue with the load on MOCA it you are running MOCA WAN?
ONT, 1- MI424WR-GEN3I, 1- VMS-1100, 3- IPC-1100, and 1- Media Center Network Tuner. Now say I add another VMS-1100 or more clients.
The CSR was clueless, and kept wanting access to my private network and PC. I don't think so. Do what you wish on your network, mine is mine!
Solved!
Go to Solution.

Make sure in is in and out is out.
Quantum TV ROCKs! Now that I removed the sand.
Check your in and out splitter connections and make sure they are tight and in is in and out is out.
I will be the first to admit when I double check my work and find I was wrong. Hey what do you want when your reconnecting coax cables after running Media Center extenders on Ethernet for 16 months in anticipation.

Can I Escape my Cable Company with Internet TV?

I just checked my cable bill today after our free trial of a DVR box from our cable company, and while the service has been excellent (they also have my phone and internet), at $67 a month plus tax and service fees for TV alone, I could buy a whole bunch of equipment and still save some $$. My son doesn't have cable tv but watches hulu for most shows.
I was wondering what the possibilities are, what equipment I'd need, and what are the potential pitfalls of going internet tv and getting the signal to 1 HiDef TV and 2 CRT type tvs (no digital receivers on those).
The latest issue of MacWorld says that the Apple TV interface isn't quite all it is cracked up to be and there are elegato tv thingies on sale at OWC, but I have to confess, although I've used Macs since 1984, I have never bothered to investigate the technology for TV so it is Greek to me. I was not enthused about the idea of using my business computer for storing, even temporarily, huge video files on the HD....
I believe my HiDef TV will receive digital signals from Pittsburgh stations, because before I installed cable, I picked up OTA stations, but that was before the switch, so I don't know for a fact whether that was digital or regular broadcast... That was 2 years ago...
I guess what I'm not sure about mostly is creating a the multi floor setup for my particular situation. My cable company provides me with one cable modem in the basement. The rest of the coax cables are set to stream the HD and Analog signals to the other jacks in the house. (my older TVs -one in the basement and one on the second floor-are SD and pre digital. They can see the Analog signals, but the cable company sells boxes to allow the tv's to get digital and hd signals IF I wanted to pay for them.)
My Setup: I have my computer, router and cable modem box in the basement and one analog tv in another room in the basement, the HD TV is on the 1st floor and I have one analog tv on the second floor (2 floors away from my computer).
I assume that the Apple TV is wireless and perhaps can get a signal from the basement through the floor, but how would I wire up the 2 analogs, even if they would work with the Apple TV... I assume both the Apple TV and the Elegato system works through an internet attachment through a computer, or does the Elegato pull signal from the cable company and make is usable on conputer (but not a TV)...?
Would you, could you, run the signals from the computer back up the coax somehow and feed it to the other TVs?
Right now, with phone, internet, and tv on the same coax system, I can't lose one to save money on the other

0r does the Elegato pull signal from the cable company and make is usable on conputer
Yes. The El Gato devices are for getting content from an antenna or cable connection into the computer. If you want to bring OTA television broadcasts into your computer, a device like those made by El Gato might be of interest to you.
The Apple TV cannot (without hacking) access content other than from the iTunes Store, so it would not be useful for getting shows from other sources such as Hulu. You'd therefore need to figure out how to connect your computer(s) to your various TVs. Working out all the various distribution issues involved in HDMI and analog would probably be better taken up on an AV-related from such as the AV Science Forum.
As to the "pitfalls" of dropping your cable service, the largest pitfall is that though a number of TV shows have been made available on the Internet, by no means have all, or even a significant percentage, of the available shows been made available for streaming or download. So before you drop your cable service, you'll want to investigate whether or not the shows you care about are available somewhere on the Internet, at a price that you deem reasonable (some are made available for free by including commercials but some you have to pay per episode).
Another thing to consider; you may find that you're getting a "package" deal if you, as you indicate, have TV, Internet and phone all from the cable company and that if you drop one service, the price on the others will go up. This may make dropping TV service less attractive, so be sure to check that out.
Hope this helps.

Representi​ng coax cable in Multisim

Similar Messages

Maybe you are looking for

Representing coax cable in Multisim