©2000 Motorola, Inc.
TDMA T2290/T2297
Cellular Overview
20
Digital Cellular
101
101010101010101010101
010
010101010101010101010
101
101010101010101010101
010
010101010101010101010
101
A/D
ZIF
D/A
Processing
Network
Slot selector
Processing
Network
Slot selector
frequency. The IF is processed in the IF strip,
which provides filtering and amplification.
A discriminator retrieves audio from the IF
and the varying voltages of the audio are used
to drive a speaker
TDMA Radio
TDMA radios use the same circuitry as ana-
log radios, for the most part, but also have
additional circuitry to convert analog audio
to digitized form and vice versa, and to se-
lect the appropriate time slot.
Figure 16. TDMA Radio
Содержание T2290
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Страница 40: ...Motorola Confidential Proprietary TDMA T2290 T2297 TDMA Test Mode NAM Programming 30 ...
Страница 68: ...Disassembly TDMA T2290 T2297 Keypad Removal Motorola Confidential Proprietary 58 ...