The tag has no wiki summary.

learn more… | top users | synonyms

-1
votes
0answers
41 views

Is it possible to transmit Coaxial signal before a cable TV box (wirelessly or otherwise)? [closed]

I just moved into an apartment that has no cable jack in the living room. From what I see, I could do one of these things to get the Comcast signal to my TV: Request that a new RG6 Coaxial cable be ...
2
votes
0answers
48 views

Why does it take less force to mate a full-detent SMPM connector than to demate?

As seen in the table at the bottom of the page the mating force of a full-detent SMPM connector is less than its demating force. This is the opposite of every other type of SMP/SMPM connector listed ...
0
votes
0answers
14 views

Common failure modes of full-detent SMP connectors?

Full detent SMP connectors are rated to a maximum of 100 mating cycles. What are the typical failure modes of an SMP connector that has experienced too many mating cycles?
-1
votes
1answer
45 views

How boost a DVB-C signal [closed]

I receive a DVB-C signal from my broadcast TV provider, and I use coaxial cables and some splitters to connect my three televisions to the coaxial wall-socket. Unfortunately I have problems to ...
1
vote
0answers
36 views

Push-on coaxial connector with RF leakage performance comparable to threaded-coax connector?

In examining the performance characteristics of the push-on SMP connector I've noticed that the RF leakage is at best -80dB @ 3 GHz and then continues to degrade as the frequency increases to -65 dB ...
0
votes
1answer
69 views

Live wire touching ground, sends power back through TV cable [closed]

This bizarre show happened twice at my house. The first time it happened I only realized something was at fault when I was having to call the cable company every two weeks to fix the cable internet. ...
2
votes
2answers
74 views

Capacitance and Inductance properties of coaxial transmission lines

I'm interested to understand what affect the capacitance (between cable core and shielding) and the inductance have on a signal transmitting down a coaxial cable.
2
votes
1answer
106 views

Closed circuit Wifi over coax?

If you connect an access point to (PCIe/USB) Wifi card over coax (i.e. no antennas) will it work? If it would work, what would the maximum cable length be? (This is just a thought experiment. I ...
2
votes
1answer
82 views

Connecting two RF devices

I plan to build two RF modules. One is an analog down converter with a balanced output IF of ~50 MHz The second in a fast ADC @ 100 MSPS with balanced input. I want to have them separated for ...
5
votes
2answers
124 views

Industry standard measure for coaxial cable stiffness?

Is there an industry standard measure for coaxial cable stiffness? By stiffness I mean the spring force experienced when bending or deforming the cable. In my search for a highly flexible lab test ...
1
vote
1answer
85 views

GPS USB device with external coax antenna? [closed]

I've been looking around for a bit searching for a USB connected GPS reciever which i can hook up to my laptop. However, the building i'm sitting at is not ideal for recieving GPS signals but i do ...
3
votes
2answers
152 views

Why does coaxial cable cause this effect?

This is a follow-up question related to my non-contact voltage detection circuit (here). I wanted to be able to detect voltage in a wire a few feet away from the Arduino, so I added a length of RG174 ...
0
votes
3answers
308 views

BNC splitter which separates ground and signal?

I'm a student doing research in a physics lab and we often have the need for a certain type of BNC cable splitter. This splitter has a BNC jack which accepts a single coaxial cable as input. It has ...
3
votes
2answers
94 views

Coax Impedance Explanation

I have been trying for a while to understand Coaxial Cable impedances for ham radio etc. use. I only know what it is not though. Coaxial Cable does not measure the rated impedance from one end to ...
1
vote
2answers
137 views

Re-broadcasting a wideband satellite television signal over a short distance?

Normally a coax cable connects a satellite dish to the receiver. I'm in a situation where I can't easily install a coax cable, but a wireless signal ought to be possible because it's only 10 meters ...
29
votes
7answers
2k views

Why were coax cables used for networking?

Often, if older standards become obsolete, it's because they are superseded by newer technologies. In the past networking was done using coax, instead of the twisted pair used today. Why did they use ...
6
votes
3answers
162 views

Are the currents that travel on the outside of coax really “common mode”?

Consider a ladder-line transmission line. Given any currents on the two conductors, we can describe those currents as the current on each conductor individually, or: currents that flow one way on ...
11
votes
1answer
403 views

Is it possible to reject noise traveling on the outside of a coaxial transmission line?

Say I have some ordinary coax between a receiver and an antenna. That coax will have three currents in it: the desired signal an exactly equal an opposite current on the inside of the shield ...
4
votes
2answers
240 views

How good is coaxial cable?

My question relates to the accumulated AC voltage that will appear on the screen of a length of coax: If the cable is properly terminated at one end and fed with data (or any signal) at the other ...