|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Very good conversation, Pretty fast Service, wood do it again,
Have paid by Paypal, so i got the Service Manual online after 15 Min.
Very helpfully.
Greeting from Germany,
Hans
;
Good-quality scans. Detailed description. I hope I can repair the machine.
;
High-quality scanning. Detailed description. Recommend for all technician. A+++
;
This is a good quality scan of the original Service Manual from Nordmende, Germany. Contains the circuit diagram, PCB layout, adjust/tune instructions as well. It is NOT in English but in GERMAN language! That was quite right for my german friend from the lower east side in Berlin.
 ;
Received via e-mail this PDF manual is worth the money. This is a quality scan of a manual in excellent condition and is just as good as having the original manual in hand. I have later seen the original manual and it was printed in colour, but this particular manual is black & white but scan resolution is high end quality! All drawings and pictures are presented in great detail. So, nearly perfect score in my opinion.
If you own the turntable you also should own the manual!
Trouble Shooting Guide, Advanced
With a Spectrum Analyser it is possible to catch a narrow sample of the spectrum as a time waveform due to a transmitted burst. By repeating that sample for a long raw of consecutive bursts it will be possible to measure the average of the spectrum components selected, in a time-gated measurement. The example of such a time waveform is seen in Fig. 4.5.
dB
Max-hold level = peak of switching transients
Switching transients Video average level = spectrum due to modulation
0%
50% midamble Averaging period Useful part of the burst
90% 100%
t
Fig. 4.5 In this time are visible waveform spectrum components from both the switching and the modulation. Looking at the time axis we know that the transmitter is started before the useful burst at the upramp. At that part of the waveform the spectrum is still affected by the upramp and a peak of switching transients is visible. The beginning of the time waveform is therefor not good for measuring the modulation spectrum. In the middle of the burst there is a training sequence, usually called midamble, with an equal bit pattern in every normal burst. This part is not interesting for modulation measurements either. The part of the waveform that follows after the midamble, called the Averaging period is the part decided to be measured as the Spectrum due to the Modulation and wide band noise by definition in the GSM spec. This period is finished at 90%, before the end of the burst. This is to avoid interference from switching transients at the downramp. At the end of the time waveform again spectrum components from the switching is present, because the time gated measurement has got a STOP point at the end of the downramp period.
4/00021-3/FEA 309 544/42 C © Ericsson Mobile Communications AB
32(38)
 $4.99 T20 ERICSSON
User Guide It's a complete guide ( also known as operating manual or owner's manual), and it's in PDF format. A…
|
|
|
> |
|
