Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 3 / 3
simon_at_avalon
User Rank
Author
re: Out of billions, one bit in error
simon_at_avalon   8/26/2010 8:22:07 AM
NO RATINGS
Yes, the Weller 'splat test' is always useful when tracking down or trying to generate occasional errors. We keep one of the old irons for this very purpose. Another interesting source is from the (plastic) wheels on office chairs running on a polished lino floor - if the lights are out you can see the sparks as you move.

zeeglen
User Rank
Author
re: Out of billions, one bit in error
zeeglen   8/25/2010 9:28:42 PM
NO RATINGS
Good catch. How well(er) I remember similar soldering irons with the transformer in the light blue stand. Every time we ran bit error tests on T1 6000 foot lines all soldering irons in the vicinity had to be turned off. One of those irons did turn out to be very useful in a test fixture I built to generate electrical power line transients. This was nothing more than a chattering relay (it's contacts in series with it's coil) to switch the AC line on and off to the soldering iron. Any time this could be shown to cause bit errors in a system under test we knew the shielding and/or power line isolation needed work. It also served to prove to management that bit errors are indeed caused by power line transients getting into the twisted pair and not necessarily through equipment faults, so they did not demand 100% error free tests.

old account Frank Eory
User Rank
Author
re: Out of billions, one bit in error
old account Frank Eory   8/25/2010 8:42:12 PM
NO RATINGS
Great story Glenn. This takes me back to the early days of my career when I was testing satellite modems. Those last couple of data points on the BER vs. Eb/No curve took forever to get. We never had issues with EMI from the soldering irons, but we did run into some interesting environmental influences that were only measurable down at the 10^-11 BER level...

<<   <   Page 3 / 3


Radio
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Most Recent Comments
rick merritt
 
VicVat
 
jnissen
 
M_Alex_Nugent
 
traneus
 
David Ashton
 
perl_geek
 
Max The Magnificent
 
perl_geek
Most Recent Messages
2/9/2016
1:17:21 AM
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...
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 ...