Showing posts with label Electronics. Show all posts
Showing posts with label Electronics. Show all posts

PTCL Internet Antennas

AMD introduced First time Pakistan Double Circuit Dual Power 2X High Gain Signal Booster Repeater Antenna these 2X High gain 10dBi Antennas at a very low cost affordable price with the help of these signal booster Antennas you can get your Wireless Ptcl Broadband Internet Customer Home Office or Shop Good signals Receive which is very amazing  AMD Dual 2X Antenna Result. no-signal-evo atif kamal

PCT Signal Booster Repeater Antennas for 3G Evo, Nitro, Wingle Cloud, Charji and Wireless CDMA Vfone Full Support Wireless High Power Antenna to improve Your Wireless Internet Hi Quality Good Signal Receive.

Model Available Pakistan:

  1. Panel Antenna 12dBi With Double 2X Power Rs.699
  2. Yagi Antenna 15dBi With Super Range Directors Rs.1099
  3. High Gain Antenna 20dBi With High 3X Booster Power Rs.1999
  4. High Gain Antenna 24 dBi With Super 4x booster power Rs.3400

Connector:

Antenna cable to USB Connector for Rs.100 Rupees only

 

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ptcl

 

Social robot Jibo, created by MIT roboticist, aims to be as widespread as smartphones

He's a cameraman and a personal assistant. He reads bedtime stories to your kids and can connect you with family and friends on different parts of the planet. And at 11 inches tall, he'll be priced similar to an iPad.jibo-300x200

He's Jibo the social robot, the brainchild of MIT roboticist Cynthia Breazeal, who has been working full-time, and secretively, on the company since she took professional leave from MIT last November.

Venture-backed Jibo Inc., headquartered in Weston, was unveiled Wednesday corresponding with the launch of an online crowdfunding campaign where customers can pre-order the robot for $499 and have it shipped to them in late 2015.

Breazeal, who has spent more than a decade researching social robots, isn't restrained when she talks about plans for Jibo, billed as "the world's first family robot." She envisions Jibo being used by people all over the world, in homes and institutions ranging from hospitals to senior living facilities.

"The way you have smartphones and tablets everywhere, you're going to see Jibos everywhere," she said in an interview.

Photographer, storyteller, messenger and more

At 6 pounds in weight and 11 inches in height, the robot is capable of many tasks. It acts as an "on-demand cameraman," picking up on cues like movement, speech commands and smiles to know when someone's posing for a picture. Breazeal says that's important for any parent who wants to be in a photo with their family as opposed to constantly being the designated photographer.

Jibo is also connected to a mobile app for iOS and Android. Users can ask Jibo to take voicemails or remind them of things they need to do. "Since he recognizes you and each member of your household, and can interact with natural social cues, Jibo can deliver the right messages to the right people at the right time," according to a company release.

The robot includes a "see-and-track camera" that makes eye contact with people in a room. For example, a person can video chat with their family and click on a family member's face, telling Jibo to turn its camera and focus on that person.

Because Jibo's target demographic is households and institutions, Breazeal said it was important for the social robot to be warm and anthropomorphic, which is why the robot is referred to by the company as a "he" and features a congenial voice.

"It's about the people," said Breazeal, also the founder and director of the Personal Robots Group at the MIT Media Lab. "The first technology that can really forge that relationship with the family is going to forever have a competitive advantage against anything else that comes in the house."

See video above of Cynthia Breazeal talking about why Jibo's voice is male and other aspects of the robot.

Company history

Founded in late 2012, Jibo Inc. is backed by about $5 million in funding from investors including CRV, formerly known as Charles River Ventures, with offices in Cambridge and Silicon Valley, and Cambridge-based Fairhaven Capital.

Jibo Inc. is aiming to raise another $100,000 from the online crowdfunding campaign and also wants to use the campaign as a way to finalize the official retail price. Breazeal said the retail price will be similar to a high-end tablet.

The robot is also available for professional developers who aim to create new applications for the robot. The developer package can be pre-ordered on MyJibo.com for $599.

The company is based in Weston, has offices in San Francisco, and its total headcount is about 10. Weston is home to the "robot secret-sauce team," as Breazeal likes to call it, which includes luminaries from iRobot, Disney and Symantec who have been working on Jibo for several months.

San Francisco is home to Jibo's vice president of engineering, Andy Atkins, who was formerly the director of engineering at Netflix, and several speech specialists are also based there.

The company's team of employees has helped make Jibo more than just a robot, Breazeal said. Jibo is meant to be a useful, artificially intelligent assistant in busy households, but also meant for people — ranging from children to the elderly — who might need a bit more companionship, or an "emotional connection," she said.

"There are areas where social support and feeling like you have support of presence really make a big difference for people," she said. "Data alone and information alone isn't enough."

 

Report by : http://www.bizjournals.com/boston/bio/18391/Sara%20Castellanos

Courtesy : http://www.bizjournals.com/

Microchips’ Programmable Drug Delivery Technology

microchips' technology is based on proprietary reservoir arrays that are used to store and protect potent drugs within the body for long periods of time. These arrays are designed for compatibility with preprogrammed microprocessors, wireless telemetry, or sensor feedback loops to provide active control. Individual device reservoirs can be opened on demand or on a predetermined schedule to precisely control drug release or sensor activation.


MicroCHIPS Technology


Our reservoir-based platform can also be used in passive control systems without microprocessors or power sources. microchips' passive systems are designed to release or expose their contents based on the controlled degradation of polymeric matrices over time. These systems form the basis for miniature insertable devices that provide maximum flexibility for device placement.

Intellectual Property
Our intellectual property portfolio supports our platform technologies and commercial products in development with approximately 140 issued or pending patents. These patents range from microreservoir fabrication and control, to long-term implantable technologies and wireless communications, as well as protein and peptide formulations for challenging delivery conditions.

Source : http://www.mchips.com/technology/technology.html

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Studying butterfly flight to help build bug-size flying robots

To improve the next generation of insect-size flying machines, Johns Hopkins engineers have been aiming high-speed video cameras at some of the prettiest bugs on the planet. By figuring out how butterflies flutter among flowers with amazing grace and agility, the researchers hope to help small airborne robots mimic these maneuvers.

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U.S. defense agencies, which have funded this research, are supporting the development of bug-size flyers to carry out reconnaissance, search-and-rescue and environmental monitoring missions without risking human lives. These devices are commonly called micro aerial vehicles or MAVs.

"For military missions in particular, these MAVs must be able to fly successfully through complex urban environments, where there can be tight spaces and turbulent gusts of wind," said Tiras Lin, a Whiting School of Engineering undergraduate who has been conducting the high-speed video research. "These flying robots will need to be able to turn quickly. But one area in which MAVs are lacking is maneuverability."

 

To address that shortcoming, Lin has been studying butterflies. "Flying insects are capable of performing a dazzling variety of flight maneuvers," he said. "In designing MAVs, we can learn a lot from flying insects."

Lin's research has been supervised by Rajat Mittal, a professor of mechanical engineering. "This research is important because it attempts to not only address issues related to bio-inspired design of MAVs, but it also explores fundamental questions in biology related to the limits and capabilities of flying insects," Mittal said.

 

To conduct this study, Lin has been using high-speed video to look at how changes in mass distribution associated with the wing flapping and body deformation of a flying insect help it engage in rapid aerial twists and 120202151608turns. Lin, a junior mechanical engineering major from San Rafael, Calif., recently presented some of his findings at the annual meeting of the American Physical Society's Division of Fluid Dynamics. The student also won second-prize for his presentation of this research at a regional meeting of the American Institute of Aeronautics and Astronautics.

"Ice skaters who want to spin faster bring their arms in close to their bodies and extend their arms out when they want to slow down," Lin said. "These positions change the spatial distribution of a skater's mass and modify their moment of inertia; this in turn affects the rotation of the skater's body. An insect may be able to do the same thing with its body and wings."

 

Butterflies move too quickly for someone to see these wing tactics clearly with the naked eye, so Lin, working with graduate student Lingxiao Zheng, used high-speed, high-resolution videogrammetry to mathematically document the trajectory and body conformation of painted lady butterflies. They accomplished this with three video cameras capable of recording 3,000 one-megapixel images per second. (By comparison, a standard video camera shoots 24, 30 or 60 frames per second.)

The Johns Hopkins researchers anchored their cameras in fixed positions and focused them on a small region within a dry transparent aquarium tank. For each analysis, several butterflies were released inside the tank. When a butterfly veered into the focal area, Lin switched on the cameras for about two seconds, collecting approximately 6,000 three-dimensional views of the insect's flight maneuvers. From these frames, the student typically homed in on roughly one-fifth of a second of flight, captured in 600 frames. "Butterflies flap their wings about 25 times per second," Lin said. "That's why we had to take so many pictures."

The arrangement of the three cameras allowed the researchers to capture three-dimensional data and analyze the movement of the insects' wings and bodies in minute detail. That led to a key discovery.

Source : http://phys.org/

 

Detailed Information links about this project :

http://cleantechnica.com/2012/02/07/johns-hopkins-researchers-develop-mav-the-size-of-a-bug/

http://phys.org/news/2012-02-butterfly-flight-bug-size-robots.html

http://www.robaid.com/robotics/analyzing-butterfly-flight-for-better-mav-maneuverability.htm

http://www.sciencedaily.com/releases/2012/02/120202151608.htm

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Sony's bio battery turns waste paper into electricity

 

Sony's paper-powered battery offers the prospect of waste paper being used to top up mobile phones_57461111_battery

Sony has unveiled a paper-powered battery prototype in Japan.

The technology generates electricity by turning shredded paper into sugar which in turn is used as fuel.

If brought to market, the innovation could allow the public to top up the power of their mobile devices using waste material.

The team behind the project said such bio-batteries are environmentally friendly as they did not use harmful chemicals or metals.

The Japanese electronics giant showed off its invention at the Eco-Products exhibition in Tokyo last week.

Employees invited children to drop piece of paper and cardboard into a liquid made up of water and enzymes, and then to shake it. The equipment was connected to a small fan which began spinning a few minutes later.

Learning from nature

The process works by using the enzyme cellulase to decompose the materials into glucose sugar. These were then combined with oxygen and further enzymes which turned the material into electrons and hydrogen ions.

The electrons were used by the battery to generate electricity. Water and the acid gluconolactone, which is commonly used in cosmetics, were created as by-products.

Researchers involved in the project likened the mechanism to the one used by white ants and termites to digest wood and turn it into energy.

Their work builds on a previous project in which they used fruit juice to power a Walkman music player.

"Using a 'fuel' as simple as old greetings cards - the sort of cards that millions of us will be receiving this Christmas - the bio battery can deliver enough energy to power a small fan," said Yuichi Tokita, senior researcher at Sony's Advanced Material Research Lab.

"Of course, this is still at the very early stages of its development, but when you imagine the possibilities that this technology could deliver, it becomes very exciting indeed."

Eco-friendly

While the battery is already powerful enough to run basic music players, it is still falls far short of commercially sold batteries.

The environmental campaign group Greenpeace welcomed the development.

"The issue that we always have with battery technology is the toxic chemicals that go into making them and recycling batteries is also complicated," John Sauven, executive director of Greenpeace UK told the BBC.

"Any way to provide a greener technology could be a potential magic bullet. So from that point of view this is interesting, and I think it's fantastic that companies like Sony are looking to make the generation of energy more environmentally friendly."

Sony's engineers are not the only ones exploring the concept of paper-based batteries.

In 2009 a team of Stanford University scientists revealed they were working on a battery created by coating sheets of paper with ink made of carbon nanotubes and silver nanowires. They said their work might ultimately lead to a device capable of lasting through 40,000 charge-discharge cycles.

 

 

Source : http://www.bbc.co.uk/news/technology-16288107

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Brain Chip to Restore Functioning from Damage

 

The ReNaChip project is developing electronic biomimetic technology that could serve to replace damaged or missing brain tissue. This is basically neuromorphic engineering that seeks to mimic how neurons function. In the future this may be useful for people who have had injuries due to stroke or other illnesses. There are numerous obstacles to getting this tech off the ground. Having the microchip interface properly with the surrounding neural tissue is one issue that could be difficult to circumvent. It is also unclear if some of the models used actually represent specific regions of the mind accurately enough for this to work properly.
This page gives an overview of this undertaking;

The objective of this project is to develop a full biohybrid rehabilitation and substitution methodology; replacing the aged cerebellar brain circuit with a biomimetic chip bidirectionally interfaced to the inputs and outputs of the system. Information processing will interface with the cerebellum to actuate a normal, real-time functional behavioral recovery, providing a proof-of-concept test for the functional rehabilitation of more complex neuronal systems.

More information can be found at this page.

Experiments are carried out with two different types of stimuli; a tone which serves a conditioned stimulus producing no naïve response and an aversive puff to the eye (unconditioned stimulus) resulting in a naïve eyeblink response. The tone always precedes the airpuff in the course of the experiment.

A recent article about it is here.

The project aims include making a computer model of a well-defined brain pathway as proof of concept for the replacement of more complex brain circuits. Implementation of this model in a microchip will be used to create a biohybrid in which a lost behavior is restored

This abstract discusses about interfacing with neuronal cells.

One of the major goals of the ReNaChip research program was to develop implantable electrodes with a very small size sensing pads. In this talk we will describe the process related issues of such electrodes and their principle of operation.

The researcher Ed Boyden has recently called for the creation of an "exocortex" to augment human abilities. It seems conceivable that a device implanted on top of the head could be used to increase intelligence or other traits. The exocortex would have to communicate with actual brain cells in some fashion. Perhaps this could be done using optogenetics or ultrasound pulses. Neither are approved for human disorders yet. Optogenetics would be more invasive but it is also much more selective in its ability to activate neuron subpopulations. I've been somewhat skeptical about whether it would actually get an FDA nod any time soon, however. Ultrasonic neuromodulation does not currently have the same targeting accuracy, but it would not require a person's skull to be breached. A sophisticated exocortex could potentially allow a two way communication between the external apparatus and the mind. The contraption could essentially scale up the amount of neurons in your brain by an artificial means. Most likely it would be used to improved the disabled first, with other applications being more speculative possibilities.

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Telecom OSS BSS Companies Directory

For now, this directory has following telecom billing and OSS/BSS companies listed:

  • Ace-Comm
  • Adivent
  • Advanced VoIP
  • AdvOSS
  • Aepona
  • Alcatel-Lucent
  • Allround
  • Amdocs
  • Aperto Networks
  • Argent Networks
  • ASC Telecom
  • Astellia
  • Avotus
  • Axiom Systems
  • Azure Solutions
  • BEA Systems
  • Berg Insight
  • Billing and Customer Care
  • Billing and OSS World Conference
  • BSG Clearing Solutions
  • C-COR
  • Call Detail Records
  • CAPE Technologies
  • Carrier Access Billing
  • Cerillion Technologies
  • Clarity
  • Clarity International
  • Comarch
  • Comptel
  • Comptel Corporation
  • Comverse
  • Conference Bridges
  • Convergent Billing
  • Convergent Mediation
  • Convergys
  • Cramer
  • CustomCall Data Systems
  • cVidya
  • Cypress Communications
  • ECtel
  • eServGlobal
  • ESKADENIA Software
  • ETI Software
  • First Hop
  • Formula Telecom Solutions
  • Frost and Sullivan
  • FTS
  • HickoryTech
  • HighDeal
  • HP
  • Huawei Corporation
  • Info Directions, Inc.
  • Intec Billing
  • Interconnect Billing
  • IntraISP
  • IPTV
  • JacobsRimell
  • LHS
  • Martin Group
  • MaxBill
  • Megasoft
  • MetaSolv
  • MetraTech
  • MVNO
  • NetCracker
  • NetMotion Wireless
  • Neural Technologies
  • Openet
  • Openet Telecom
  • Operax
  • Oracle
  • Orga Systems
  • OSS Conferences
  • OSS Visibility Index
  • OSS/J
  • Plantronics
  • Portal Software
  • Pricing and Rating
  • RateIntegration
  • Redknee
  • Revenue Assurance
  • Roaming
  • Seeker Wireless
  • Service Assurance
  • Service Fulfillment
  • Sicap
  • Sigma Systems
  • Skyline Communications
  • Sonus Networks, Inc.
  • Subex
  • Subex Azure
  • Subex Azure Limited
  • Subex Limited
  • Subex Systems
  • SunTec
  • Syndesis
  • Tango Telecom
  • Tata Communications Ltd.
  • Telarix
  • Telcordia
  • Telecom Cost Management
  • Telecom Fraud
  • TeleManagement Forum
  • Telephone Headsets
  • TeleSciences
  • TeleStrategies
  • Telrad Networks
  • TEOCO
  • Theta Networks
  • TM Forum
  • Traffix
  • Tribold
  • TTI Telecom International Ltd.
  • Veramark Technologies
  • Vibrant Solutions
  • Vodafone
  • VoluBill
  • WeDo Technologies
  • ZTE Corporation
This section lists Telecom Billing and OSS/BSS companies. Telecom Billing companies offer solutions for the telecommunications industry and facilitate telecom operators and service providers in their billing, provisioning, retailing, auditing and revenue assurance etc.

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5V 5A Higher currents by LM340-5 and 2N4398

For my new USB hub I need around 2 Ampere power, the circuit I designed earlier was producting only 500mA, so I came up with this circuit. This is almost same as previous one but adding a transistor solved the high current requirement. The transistor use to share some the the current. The Voltage regulator maintains the output voltage and still operates short circuit protection. The current 1 A from the regulator and 4 A from the transistor sum up to 5 Amperes : )

The current that the transistor takes is set by the resistor R1 and R2 i.e I=R2/R1 * RegulatorCurrent.



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Ground Loop Isolation / Noise Suppression

Last week I was fighting with my audio system installation in my car, although it was going in smooth patch but after pluging in my computer I got stange noises from speakers, I just coped out the situation and now here is detailed information how to get rid of that noise....

I never trust on working of street electricians as they just tie wires where they found an easy way and reach, they never calculate or even know about crucial current/voltage running in wires and load ratings. Accidently few month before I got repaired my electrical system of car but very next day aaaahh!  I got smoke from my engine room and it cost me to change the whole loop because the wires got BBQ.


The following checklist can be used for the basic troubleshooting of noise in mobile audio installations. The key to success is to relax and systematically go through the vehicle. The problem WILL be found. Murphy’s Law states, however, it will be in the last place you look.


1. TO BEGIN: Be sure that system is correctly designed and matched for compatibility.

2. INSPECT VEHICLE: Verify ground from negative battery terminal connections to the fender and/or chassis. Upgrade as needed. This connection must be capable of handling all the current flow requirements of the system. ASSUME NOTHING, oversize as needed.

3. CHECK VEHICLE ELECTRICAL SYSTEM: Battery, alternator, etc. Make sure your alternator can adequately supply the sound system as well as other vehicle systems (alarm, lighting, etc.) AMPS/VOLTAGE NOT OK: See service technician to have system repaired or upgraded.


4. PROPERLY MOUNT COMPONENTS:
4.1 Electrically isolate them from the chassis.
4.2 Mount away from vehicle harnesses, computers, etc.
4.3 Do not hesitate to use a factory wiring diagram if needed. DO NOT GUESS!

5. PROPERLY RUN ALL CABLES:

5.1 USE CORRECT GAUGE WIRE. If in doubt, go larger.
5.2 Ground all components to a central point and/or use a "ground sniffer" to locate a quiet area.
5.3 Run power and signal cables down opposite sides of vehicle.
5.4 Properly terminate all connections (double check!).
5.5 Use a relay to provide clean power to accessories if needed.
5.6 Use the same gauge wire for power and ground.
5.7 Check signal cables for continuity and repair any open shields or cold solder points.
5.8 Ensure that the shield of signal cables, especially RCA ends are not touching the chassis.

6. HOOK EVERYTHING UP: Follow the instructions provided with the component and be sure of polarity. Make sure everything is working and set all line levels. If noise exists, please continue...

7. IGNITION NOISE: Check for noise in each of the following switch positions:
7.1 IGNITION ON, CAR NOT RUNNING: It is possibly related to an Electronic control module, digital dash, or possibly fuel pump. Do not attempt to filter an E.C.M.! Re-route cables away from control unit or fabricate a shield.
7.2 ACCESSORY POSITION, CAR NOT RUNNING (All accessories off): Substitute an isolated signal source (such as a walk-man CD, tape player, or home CD player), if the system plays fine, the head unit needs to be checked.
7.3 ENGINE RUNNING: Make certain no ground loops exist between components (if they do, see next section.).
NOTE: Pulse Width Modulated headlight switches (like some Honda cars use) can cause a whining type of noise when on, verify this type of problem by turning lights on and off while listening for noise. If this is the problem, the headlight switch may need to be replaced with an alternate type.

8. GROUND LOOPS AND/OR RADIATED NOISE EXIST: Check resistance of all ground cables; consider using central point grounding. Resistance needs to be as low as possible (around .2 ohms) on your meters lowest scale. If not, re-do or upgrade cables. If it is not possible to get the resistance’s this low, try to get them all at an equal value (all the same resistance.)
TIP: Use the combination of a DVM and a ground sniffer to find the best ground point. Remove the positive cable from the vehicles’ battery and check resistance’s from:
A. Ground point of all units with connection point on chassis.
B. Connection point on chassis with the negative terminal of the systems battery.
C. Battery negative terminal with the chassis connection point.
8.1 RADIATED NOISE: Place head unit next to amplifier and plug directly in (or use an isolated source such as a Discman or Walkman) and turn system on. Listen for noise. If noise is gone, please continue...
Muting plugs can be used to systematically troubleshoot the point at which the noise is entering the system. Muting plugs consist of a male RCA end with the positive and negative (tip and shield) connected together (a dead short). Open RCA ends can become an antenna radiating noises into a sound system. By inserting muting plugs into the inputs of each component in your system one at a time the source of the noise can be found.
This is a process of elimination starting with your amplifiers. Insert the muting plugs into the inputs of the amps. Turn on each amp (with the muting plugs inserted) one at a time and with the car running listen for noise. If none is heard, the amps are OK. If all amps are OK, connect the next piece in the signal path upstream of the amps (typically the crossover) by connecting its outputs to the amp inputs using normal RCA cords. Now insert the muting plugs into the inputs of that product and turn on the system. If noise is heard now, power the component with an external power supply. If the system is now quiet, the noise is probably entering through the components’ power supply. If no noise is heard, insert the plugs into the next component upstream in the signal path and check it the same way. Keep working your way upstream all the way to the head unit. Once the problem is found, you can stop.

9. ANTENNA NOISE I: Unplug antenna from the back of the head unit and listen for noise. If noise is eliminated, see section 13. ANTENNA NOISE II. However, if noise remains:
9.1 With head unit powered up and all speakers connected, slowly pull head unit from dash cavity and check for noise:
A. Noise Remains: Noise is entering on one of the power lines; ignition or memory. Install filter onto appropriate wire.
B. No Noise: The dash harness is radiating noise. Locate and re-route harness and shield entire harness next to the head unit. Isolate head unit chassis from metal dashboard.
9.2 If noise still remains, determine which of the following noises is present and suppress the noise at the source using the following sections:

10. IGNITION NOISE II

11. ACCESSORY NOISE

12. ALTERNATOR WHINE
NOTE: The following checks will not be necessary in most cases, but if the previous checks are not effective, continue.

10. IGNITION NOISE II: Determine the source of the ignition noise.
10.1 ONE OR TWO CYLINDERS: Try the following fixes in order:
A. Check for loose or defective spark plug wire.
B. Check for cracked rubber boots at the distributor or ignition coil(s).
C. Re-route plug wires away from car wiring or sensor leads traveling into passenger compartment.
D. Check for bad plugs (excessive gap).
E. Replace cap and rotor.
Note: you can often mist the ignition system with water to help sparks from failed equipment show up. Do this at your own risk of course.
10.2 ALL CYLINDERS: Try the following fixes in order:
A. Check ground from engine to firewall. Upgrade if needed.
B. Install a ground strap from the engine block to the chassis, as well as the hood.
C. Check heater core ground.
D. Check A.C. accumulator ground.
E. Move all wiring away from high energy ignition (H.E.I.) and plug wires.
F. Inspect H.E.I. ignitions, modules, and coils for the following and replace if needed:
1. Distributor cap; cracked, loose, or carbon build-up.
2. A rotor with burned black spot on wiper or pits in the surface.
3. Defective coil.
4. Oily film on lead terminals or inside of cap.
5. Defective ignition module (can cause ignition noise on FM only).

11. ACCESSORY NOISE: May be identified as a turn-on "pop", relay "pop", or other motor type noise.
A. Turn-on "pop" is usually due to components turning on before transients have a chance to settle. Delay the turn-on signal to suspect unit.
B. Relay "pop" is due to a component ground being at the same connection point as, say, the brake lights. Move the ground location. This can also be caused by excessively high gain settings.
C. Filter the power line to noisy motors (blower, etc) (check motor current draw for correct filter.)


12. ALTERNATOR WHINE:

12.1 CHECK ALL GROUND CONNECTIONS. If an audio component has some type of internal ground switches or jumpers, try changing settings.
12.2 CHECK ALL GAIN SETTINGS. Some components have gain built into their circuitry (either fixed or variable) and will increase signal levels. Gain controls are for matching signal voltage levels. They are not volume controls.
12.3 Check continuity of all RCA shield connections. Look for open or cold soldered connections.
12.4 On products with Balanced Differential Inputs, make sure no metal barreled RCA plugs are touching each other. This will defeat the differential circuit and create noise.
12.5 Eliminate all ground loops. (Refer to section 8: GROUND LOOPS.)
12.6 Install a cable from alternator ground to battery negative terminal along side the alternator charge wire using same gauge wire as main system power wire.
12.7 Install a filter on alternator output lead.
12.8 Have mechanic check alternator – repair or replace if necessary.

13. ANTENNA NOISE II: Fixed mast or power antennas go to section 13.2...
13.1 Windshield antennas: plug antenna back into radio and place aluminum foil over entire dash top and ground it with clip leads to door jamb switch.
A. NO NOISE: Use noise sniffer to locate which part of the dash the noise is generating from. After locating problem area, the following fixes are possible:
1. Line underside of dash with aluminum tape and run a ground lead to it.
2. If a noisy cable can be found, move it or shield it and ground the shield.
3. As a last resort, install a conventional antenna.
B. NOISE REMAINS: Measure resistance from antenna cable shield where it plugs into the head unit to a good ground using the lowest scale on DVM. Repair if necessary. Measure shield again. If ground is still bad, replace the antenna lead.
13.2 Fixed mast or power antennas: Measure antenna ground from shield at plug end to ground on back of head unit using the lowest scale on DVM.
A. POOR GROUND: Disconnect and clean all RF connections. Check for a good ground at the antenna trim ring and mounting bracket. If the ground is poor, run a braided strap from the base of the antenna to a good ground. If noise remains, please continue...
B. GOOD GROUND: Try using a test antenna. The base must be grounded. Hold the base, not the mast.
1. POWER ANTENNA TEST: Disconnect antenna connector. Measure the resistance from the mast to the center conductor pin of the lead-in.
a. If resistance is less than 2 Ohms using the lowest scale on the DVM, measure from the mast to ground. If open (infinite resistance), suppress at the source.
b. If resistance is more than 2 Ohms, replace the antenna.
2. FIXED MAST ANTENNA TEST: Replace antenna.

14. You’re Done!


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