Questions tagged [network]

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1answer
44 views

In sale or custom made?

RJ45 to 8 pos board connector. Board connector width: 12,4 mm Pin pitch: 2 mm Found inside a plastic card printer. Somewhere to purchase cable? Identification of the board connector?
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0answers
40 views

Designing a wireless network of sensors

I'm designing a network of wireless sensors for an outdoor enviroment. It will consist of aprox. 30 sensors powered by battery (6 months autonomy), taking measurements with a low frequncy (max 10 ...
3
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1answer
54 views

How does an LC network enable a shoot through state for an inverter

I was researching about inverters when I came across the Z source inverter. The Z source inverter is unique in a sense that it enables a shoot-through or a short circuit condition by closing any two ...
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0answers
14 views

One Port Microwave Active Network Electrical Model

let's consider an active one port network: My book does an analysis of it by considering the Poynting Theorem, in which we consider the contributions of active sources (electric and magnetic current ...
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1answer
58 views

Guard Band Reduction in 5G compared to 4G

Why is there less guard band required for 5G as compared to 4G .For 4G guard band are defined to be 10% of bandwidth on each side while guard band for 5G are defined in 3GPP 38.101-2. For ex If we ...
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0answers
39 views

Is there a RJ45 with magnetics for PHY less network switch

I have a network switch indoor and camera outdoor. I plan on having a PCB with RJ45 with magnetics. Can any tell me how to choose an RJ45 with transformer for a PHY Less network switch.
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1answer
61 views

A few questions about the application of ethernet controller and PHY chip and SFP module

I have a question about the connection/application between the ethernet controller and PHY/SFP modules. Actually, there're so many scenarios for building up a NIC card, which makes me confused. For ...
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4answers
30 views

Phase of Scattering Parameters

I do not understand the meaning of the phase of scattering parameters. Let's consider for instance a two port network, and let's focus on S21. I know that its absolute value represents a ratio ...
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0answers
164 views

Consistently assigning electrode nodes in random resistor networks

In the context of random resistor networks, the general question of interest is often "what is the effective resistance between two arbitrarily chosen nodes?" But more specifically about the nodes we ...
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0answers
27 views

What does it mean, for poles and zeroes to alternate; Foster's Theorem

I'm currently learning Foster's reactance theorem; The most general driving-point impedance Z obtainable by means of a finite resistance-less network is a pure reactance which is odd rational ...
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1answer
38 views

Graph theory for Networks

To use the formula, [Bf][Zb][Bf'][I] = [Bf][Zb][Is] - [Bf][Vs] for the concerned, or any tree, should [Vs] and [Is], be written with respect to the directed tree I've taken, or with respect to the ...
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2answers
145 views

Is this an active or a passive circuit?

Is this an active or a passive circuit?
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1answer
72 views

Please help reduce the following circuit to an equivalent circuit with single resistor and source

Please help reduce the following circuit to an equivalent form as I am unable to understand the given solution in the book. If required I will share the solution later. Thanks in advance. @jonk, @...
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1answer
39 views

How many nrf24l01+ can be transfer data between themself in one pipe

My IOT project has ten or more nrf24l01+ modules which They're going to get orders from one nrf24l01+ module and then get back response to that one nrf24l01+. Can i do it in one pipe?
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1answer
42 views

Output Impedance with Series Diode

Can someone explain how do i find the output impedance of the given cct? The typical method involves attaching a voltage source at the output and shorting all independent voltage source (and open cct ...
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1answer
47 views

What's the purpose of the T568A/B's color wires?

I know that pair 3 in T568A is used for transmitting data while pair 2 is used for receiving data. In T568B the logic is reverse, meaning pair 2 is for Tx and pair 3 is for Rx. What's the purpose of ...
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2answers
86 views

Is there so much of a 'technological quantum leap' in 5G technology? [closed]

AFAIK, it is only the antenna hardware that goes into the smartphone/tablet and also the base-stations, where the technological breakthroughs can realistically be present. Every other component of the ...
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0answers
28 views

Problem on connecting XBee module with Sengled classic Bulb over Zigbee network

I am using XBee S2C module and configured as Zigbee coordinator with Zigbee stack profile set to Zigbee-pro and I am trying to discover and control Sengled Zigbee based smart bulb. Using XCTU ...
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0answers
23 views

How to convert T matrix to Z matrix in two port network?

How can I transform a T matrix to become a Z matrix for a two-port network? I found the following conversion to get the T matrix from Z matrix from here : https://www.tutorialspoint.com/...
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0answers
28 views

Rx's permanently enabled in IEEE 802.15.4 wireless sensor network

I am using atmel avr2025 to make a peer to peer wireless sensor network. I am fine setting up a star network but have problems when we want to send data to nodes not being the PAN coordinator but ...
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3answers
187 views

Difference between 5G vs 4G in terms of energy consumption

I want to build a device that is expected to consume very little energy. I don't know if it will be better to have it compatible with 5G or just leave to be compatible with 4G. So, do the 5G consume ...
6
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2answers
129 views

Detect if a CAN node is transmitting or receiving

I am not an electrical engineer or EE student; I'm a diagnostic technician. AFAIK, a CAN transceiver receives bits by measuring voltage between the network and its ground/low reference (high ...
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4answers
272 views

Does a poor mobile network signal cause faster battery drain? [closed]

Quite a simple question actually, does a poor mobile network signal cause faster battery drain? If so, is there a difference between 2g/3g/4g/5g in the speed at which the battery drains.
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1answer
109 views

Can I extend a single twisted pair DSL line using a coaxial cable?

I'm in the process of setting up a DSL modem/wifi router, which should be connected to a phone line that uses a single twisted pair. However, the phone line enters my house in a slightly inconvenient ...
1
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1answer
53 views

How to avoid duplicate messages in a mesh network of mcus

I'm working on a project, where each pcb has a connector on every side, so you can connect these board in a grid. It's basically a mesh network of modules. These modules need to communicate with each ...
1
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0answers
86 views

PHY Link only establishing 10 Mbps speed when both devices 100 Mbps capable

I've designed a circuit board with a Microchip switch (KSZ9897) going to a Ethernet-to-VDSL module (LX200V20). The PHY ports between the two devices are connected using a transformerless connection ...
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1answer
164 views

How to solve infinite grid with the observing terminals at diagonal of infinite square matrix?

The answer given is 2/3ohm solution is not given but I can expect how they got that answer but can't justify the way.
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0answers
31 views

Configuring Xbee3 Mesh role from a microcontoller

I am looking to set up a Zigbee Mesh Network using the Xbee3 module, but a question that I have is would I be able to configure this network (and even change roles) “on the fly” using an STM ...
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0answers
15 views

Average and maximal number of time slots in adaptive tree walk protocol

I was wondering if it is possible to know the maximal and average number of time slots that will pass until and including the time slot in which there will be a successful broadcast, knowing that two ...
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0answers
10 views

finding the minimal length of a broadcasting frame in a channel(CSMA/CD)

i am unsure about this question. would appreciate your assistance with it. in the following CSMA/CD network with cable length L and propagation T. assuming that the signal is not decreasing and there'...
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1answer
59 views

Bit-Map vs ALOHA protocol

So i have been reading about ALOHA and Bit-Map protocols and i am note sure which is more preferable in the following scenario: 8 stations, numbered 0-7 want to transmit in any given time slot. ...
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0answers
154 views

What is maximum symmetrical output voltage swing in this case?

I'm pretty new to Electronics and hence the following doubt. I could not understand how the authors reasoned out the swing limits for this problem ((b)-part only)
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0answers
21 views

calculating the probability of a successful broadcast in p-csma protocol

am quite unsure with the following question. would appreciate your help with it: in a 3 stationed p-csma network, where \$p=0.3\$, we know that in \$t_0\$ the network is restarted, the channel is ...
3
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1answer
133 views

How do coaster table pagers order themselves?

You've probably seen them. Those coaster or puck size electronic things they give you at a restaurant to buzz you when your food is ready. A seemingly common element of their design is that they have ...
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2answers
47 views

can arduino UNO be programmed to measure the analog voltages of 6 resistor ladder network without using switches [closed]

6ea 1k resistors connected in series to +3.3v and Gnd. Q how can arduino UNO A to D be programmed to measure the analog voltages of 6 resistor ladder network without using switches ?
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1answer
59 views

What does it mean by, “No voltage is applied”?

I've a very basic query. If a question says, "no voltage is applied to the circuit" does it mean the battery is replaced by short-circuit (since, no voltage => 0V) or by an open-circuit (literally, no ...
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3answers
96 views

Earth Fault in a TT Network: Current loop, or charges flowing from one grounding to the other?

There are serveral things I (yet) don't understand about the T-T-earthing system. The most important one is that I don't understand which way the the current takes in case one of the conductors (for ...
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0answers
53 views

a tricky question regarding CDMA with 4 stations

i have encountered this tricky questions that left me really confused, would really appreciate your insight regarding it: given a cellular system with four stations that utilizes CDMA. given the ...
1
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1answer
129 views

Direction of current flow in resistor networks

We have a simple resistor network \$g\$ with \$5\$ nodes and \$6\$ edges (resistors) as given below: We assume all resistors have the same resistance (say \$1\$ Ohm, so homogeneously distributed ...
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1answer
45 views

What are the factors that affect delay/latency between base stations?

I am modelling a 5G network, with the uplink and downlink being decoupled and treated as separate networks. I am exploring the integration of fog computing and how latency varies between different ...
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2answers
270 views

Shifting of current sources [closed]

Can someone justify shifting current sources iam not able to understand how it is done
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1answer
19 views

Two port network z parameter determination

I would like to know how it is solved in book as I found that it is way quicker than the way I solved. Any detailed explanation will be appreciated.
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0answers
45 views

Wifi coaxial cable type unknown

Quick question, I was unable to identify the coaxial cable type used in wifi devices(routers ,tablets,etc.) , very thin grey cable approximately 1mm in outer diameter, I need to know the type so I can ...
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2answers
160 views

Fitting of continuous transfer function

I measure a network's transfer function using a network analyzer and therefore have a set of complex data points, representing the network's gain and phase. I wish to fit a continuous, rational ...
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1answer
58 views

THINNET 10BASE2 Network using RG-58 Coaxial Cable operating frequecy?

I am trying to figure out what the signal frequency of a 10BASE2 network is. Specifically the frequency of the signal being carried over coaxial cable. Data transfer is 10Mbps and the network adapters ...
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3answers
207 views

What determines the frequency of network cable

You have Cat6, 23 AWG, rated for 250Mhz frequency. You then have Cat6a, 23 AWG, rated for 500Mhz. Both are unshielded. How is Cat6a able to transmit data at a higher frequency then its counter part? ...
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1answer
484 views

Difference b/w Symmetric and Reciprocal Networks

A circuit exhibits symmetry when interchanging ports across a plane of symmetry results in no change in the impedance, admittance or scattering parameters of the circuit. Reciprocity also means ...
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1answer
284 views

How to understand Transmission and Propagation delay formula

I have three questions below. I would like to understand how their respective answers were reached, this is a question in my current class and everyone in the class has A-Level mathematics experience -...
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0answers
60 views

Determine Y-parameters for given circuit. [Used Nodal Analysis]

I am trying to solve this circuit for past 3 hours, no success, so I am posting here. simulate this circuit – Schematic created using CircuitLab I used nodal analysis, I will go over the ...
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1answer
81 views

Trouble with instrumentation and simulation of the common-mode response of a filter

I have been struggling to obtain the Bode plot of common-mode response of a filter. I first simulated it using LTspice, then I used a USB network analyzer. Both do not match each other and to the ...