TDMA T2290/T2297:
Antenna Circuit
B2
Description
A100 is the internal antenna port for dual band operation(800 &1900MHz). An antenna tap(J100) is used to allow a RF connection to test equipment for proper diagnostic
testing. When nothing is inserted in J100, the switch is closed, allowing the internal antenna path to be used. If a connection is inserted in J100, the switch will open, not
allowing the internal antenna path to be used. During this state the external RF path will be used.
Diplexer FL100 is used to isolate the two operating frequency bands. The cellular(800MHz) frequencies will be routed to duplexer F500. The PCS(1900MHz) frequencies
will be routed to duplexer FL453.
F500 is a 800MHz duplexer used to isolate the cellul ar(800MHz) transmit and receive frequencies. FL453 is a 1900MHz duplexer used to isolate the PCS(1900MHz) trans-
mit and receive frequencies.
J100
FL100
F500
FL453
RF_800
RF_1900
RX_800
TX_800
RX_1900
TX_1900
A100
Summary of Contents for T2290
Page 1: ...DIGITAL WIRELESS TELEPHONE Service Manual Level 3 Release 1 TDMA T2290 T2297 ...
Page 26: ... 2000 Motorola Inc TDMA T2290 T2297 Cellular Overview 16 ...
Page 40: ...Motorola Confidential Proprietary TDMA T2290 T2297 TDMA Test Mode NAM Programming 30 ...
Page 68: ...Disassembly TDMA T2290 T2297 Keypad Removal Motorola Confidential Proprietary 58 ...