Gsm Transmitter - Nokia Mobile Phones NSE-5 Series Service Manual

NSE–5
Troubleshooting

GSM Transmitter

Apply a RF–cable to external RF–connector (X501) to allow the
transmitted signal act as normal. RF–cable should be connected to
measurement equipment or to at least a 10 dB attenuator, otherwise the
PA may burn.
Start WinTesla–Service–Software and
Select: Product
Select: Testing
Path of the transmitted GSM signal
This path defines the general route of the transmitted signal:
COBBA_GJP (N200), SUMMA(N700), 116 Mhz Filter(L703, L704, L708),
CRFU3 (Upconverter N600), GSM Filter (Z601), MMIC PA (N500),
Directional Coupler (L500), Duplexer (Z500), Diplexer (Z503), Mechanical
Swith (X501), Antenna.
The related component number(s) are defined inside (.).
There is also power detection (V500) and power control circuits inside
SUMMA for transmitter power control.
Page 30
Technical Documentation
Band
GSM
RF Controls
TX Continous
TX_Data Type: Random
TX Power Level : BASE
Channel: 60
PAMS
Issue 1 07/99