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Wet Cement
cblthmpr
2/8/2001
Thanx for the response Steve,we all understand that's the nature of buisiness.You'd think that since the prices of everything has gone up,they'd atleast step up to the plate and face the real music. If you want good quality work you have to pay for it.I'm not saying it has to eat in to a major part of their profit, but you'd think they could make it alittle more attractive and make it worth our being there.Thanx
Richard Venturelli
2/8/2001
THE WAY I SEE IT! All the major MSO and the new ones expected the DOT COM companies to do well the last couple of years so there was a mad dash to put up cable and get the ISP market. Well we all know that DOT COM's are failing and it does not look good. I believe that because of this failure, the MSO are cutting back with new tech. and construction. Also, the internet was very over rated and what was expected to be an explosion of subscribers never came. The Economy is down and anyone thats been in this business knows, the first to suffer in a bad economy is Construction and its usually the last to come out. The MSO's are no longer interested in the TV side of the business, they want the internet side and its just not going down the way it was expected. Why do you think RCN is over building? Soon if the big boys like AT&T have their way you will be billed by the minute to use the Internet and that's what all MSO's are banking on. There are bills in Congress now to change the way you are billed. And guess whwho the sponsers of these bills are ATT&T, Charter, and all the rest. Cable companies are no longer interested in the TV side of this, its all about the Internet!!!! Most of the Public out there is not ready for this so called Internet way of doing business. They look at E retail and E commerce and say what the hell is that??? Until this changes, it will be slow! just my two cents on it.
Cassie Even
2/8/2001
Hey Buddy, Just saying hi, and seeing whats going on. Hope to talk to ya soon.
SplicerLife4me
2/8/2001
you know what I think the problem is? well i'm gonna say it anyway! : ) people just got greedy. plain and simple. at&t is a prime example of greed. see where it got them? one bad apple (if left alone) WILL spoil the whole bunch!!!
SWeePTeK
2/8/2001
Jim, I don't know if you just messing around or really want to know but I would need a bit more info to give an accurate answer to your BER dilemma. But based on what you've given me... Plot the BER as a function of the "total RF power" present at the input of a device. The "total RF power" is plotted along the X axis while the measured BER is plotted along the Y axis. "Total RF power" refers to the total integrated power due to the 23 QPSK channels plus any parasitic noise (presumably very low) measured at the DUT's input. Twenty-three evenly-spaced QPSK channels will fill a 5-42 MHz bandwidth. Thus, the conversion from a "power per channel" to "total RF power" is given by: Total RF power = [10*LOG(23) + N]dBmV, where N = power per channel in dBmV For example, given 23 QPSK channels at +15 dBmV each: Total RF power = [10*LOG(23) + 15]dBmV = [13.6 +15]dBmV Total RF power = 28.6 dBmV In functional systems, channels originating from different locations can have significantly different individual channel levels measured at a common point within the system like the input to a return transmitter. This makes it difficult or even impossible to calculate power on a "power per channel" basis. Another reason is ingress, for which a power "budget" can't be assigned on a per-channel basis because most ingress is random in event strength and duration. Defining the BER operational window based on total RF power is practical because it can be measured with an RF power meter, a tool to which system operators typically have access during return systems alignment. Additional equipment requirements A data transmission analyzer (DTA) measures the actual BER, which is calculated from detected pattern errors. An arbitrary waveform synthesizer provides 22 simulated QPSK carriers to fully load the 5-42 MHz return. The channels have the correct peak-to-average power ratio for a QPSK signal, and every simulated channel can be demodulated into a constellation or eye diagram format using a vector signal analyzer. The only difference between the 22 simulated channels from the AWS and the single live channel at 19.3 MHz is the simulated channels carry no data. The channel carrying the data used in the BER test has a marker placed at the peak. Generally, active devices will be limited for low-level inputs either by the thermal or a "colored" noise floor. Thermal noise is sometimes called "white noise" because it's random in power, frequency and phase. Colored or sporadic noise sometimes describes the noise floor behavior of a Fabry Perot (FP) laser. The noise floor can have a combination of random and impulsive noise.
Jim
2/8/2001
CED July 1998...yes I have read that article. Since I in the past haven't cared about testing...the real question is this: Are there units for measuring QPSK and QAM signals that also displays BER and MER. Obviously, the BER will only know which bits are in error if the signal source is a bit generator and has communication with the analyzer. Sorry for the confusion...and the need to integrate transforms...
wireguy
2/8/2001
RWalker first thing you probably wish i was a queer so you would have a friend!!!!! Seond of all i am down in central Fla. burning up about 8000' of fiber everyday making killer money! ALL DRIVE OFF down!!!!! But it would take some illiterate asshole like yourself not to understand!! You probably cant even climb a pole or on second thought thr queer thing you probably could!!!!probably suck a good one also!!So your probably one of those 8$hr monkeys working for nothing !!So i just wanted to respond to ignorance you knee pad underneath the desk kinda guy!!!!!!!!!
wireguy
2/8/2001
RWalker first thing you probably wish i was a queer so you would have a friend!!!!! Second of all i am down in central Fla. burning up about 8000' of fiber everyday making killer money! ALL DRIVE OFF!!!!! But it would take some illiterate asshole like yourself not to understand!! You probably cant even climb a pole or on second thought the queer thing you probably could!!!!probably suck a good one also!!So your probably one of those 8$hr monkeys working for nothing !!So i just wanted to respond to your ignorance you knee pad underneath the desk kinda guy!!!!!!!!!
SWeePTeK
2/8/2001
Jim, I think this link may help you (I hope)http://www.hukk.com/cr1200r.html. Please let me know as I think we have been wasting our time for years with analog testing in the sub-bands. What has been our plan for the subs a along (rhetorical)? *Digital Service* (barring status monitoring).
rwalker
2/8/2001
Queerboy, I don't care if you are or not. I'm a fiber contractor not an $8hr man. Everybody has to start somewhere, quit whinning. If your not good enough to keep your job from an $8hr man, then you must not be that good. Learn to speak with a little intellegence and maybe someone will listen instead of laughing at your blubbering.