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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
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This service manual for the Kenwood KT-990D was reproduced really well ,is very legible and manual is complete.Combined with the low price paid,in the future,I will be checking Owner-Manuals.com any time I need a manual.
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When I purchased this manual I had my doubts regarding the quality as the price was so reasonable as compared to other outlets.
The manual itself is of high standard the print is very clear as are the diagrams. Obviously with the diagrams one has to zoom in otherwise it is to small to be able to read.
Overall I am very pleased with the company who delivered as they said and with the manual they supplied.
I occasionally require a manual and now having registered with this company I shall order from them in the future.
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I was at first dubious about payiong for downloaded manuals but having done so, I was extremely impressed with quality of the two manual I ordered, well worth the small price I paid.
I would highly recommend these to my friends.
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reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
Départ. Technical support- CM640
PROCEDURE
COMPANY RESTRICTED
PHILIPS Consumer Communications Centre du Mans
Service Repair Support
VY-V-640-620-3 Page : 18 of 63 Language : EN Date : 11/02/03
With the GPRS, a transmission rate included between 40 and 115 kbit/s is available. Everything depends on the number of virtual canals or " time slots " used, and on coding scheme (CS1 to CS4). GPRS acts on the compression of the data as a multiplier of transmission rate. In 3+1 multislots mode (three slots for the network towards mobile, and a slot for the mobile towards network), it�s allows a transmission rate of 40 kbit/s with a CS2 coding scheme. With (8+1)multislots using the CS4 coding scheme, one achieves in practice 115 kbit/s (in theory 175 kbit/s). If, as it seems to be the current will of the operators, GPRS re-uses the existing GSM infrastructure, notably by keeping the network of current base stations ( BTS), upgrading the BTS software.
Average time to send an E-mail with a 10 pages attached document :
Standard Current GSM Standard Modems (V90) RNIS GPRS EDGE UMTS
Rate 9,6 kbit/s 57,6 kbit/s 128 kbit/s 144 bit/s * 384 kbit/s * 2 Mbit/s * : in optimal conditions
Time elapsed 7 min. 70 sec. 31 sec. 28 sec. 10 sec. 2 sec.
Three types of air terminals
Three types of air terminals were defined to meet the needs of the GPRS: the basic model (class B) is foreseen for the voice and the data in not simultaneous mode. The professional or industrial model (class C) is data exclusively (the air terminal is used as a modem). Finally the up-market (class A) is compatible voice/data simultaneously. This class A terminal is problematic. The power of calculation required at the moment has a strong incidence on its production cost and makes it dissuasive.
In the GPRS standard, three new types of mobile terminal have been defined: Class A terminal, which supports simultaneous circuit-switched and packed-switched traffic; Class B terminal, which supports either circuit-switched or packed-switched traffic (simultaneous network attachment) but does not support both kinds of traffic simultaneously; Class C terminal, which is attached either as a packed-switched or circuit-switched terminal. The terminal types are further differentiated by their ability to handle multislot operations. The terminal can use from 1 up to 8 time slots on the uplink and on the downlink channel. 18 services classes are defined in function on the number for support time slots.
� PHILIPS ELECTRONICS N.V. 1999 All rights reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner.
VY-V-640-620-3
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