Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
JOHNEHRHART
User Rank
Author
re: Troubleshooting audio and video noise
JOHNEHRHART   12/1/2009 10:06:29 PM
NO RATINGS
The surrogate schematic details are a little unfamiliar. Are those coax feedthroughs that are electrically isolated from the box on boththe center conductor and the shield?? Can you draw it differently? Is the 75 ohm resistor connected to the surrogate box? Is the box metal ? I assume so? Are you going to use a signal analyzer that will actually identify the noise frequencies and power spectrum? Or just monitors? I like the hummer idea. What is common impedance coupling? Same as common mode noise? The assumption below is that a properly designed device will have very low resistance between device chassis and ground contacts for each input or output, right? 4. Connect one hummer lead to the device chassis and touch the other lead to the ground contact of each input or output connector. If the device is properly designed, there will be no output hum or change in the noise floor.



Radio
NEXT UPCOMING BROADCAST
In conjunction with unveiling of EE Times’ Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. One of Silicon Valley's great contributions to the world has been the demonstration of how the application of entrepreneurship and venture capital to electronics and semiconductor hardware can create wealth with developments in semiconductors, displays, design automation, MEMS and across the breadth of hardware developments. But in recent years concerns have been raised that traditional venture capital has turned its back on hardware-related startups in favor of software and Internet applications and services. Panelists from incubators join Peter Clarke in debate.
Flash Poll
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.