Synthesizers - Nokia Mobile Phones NSE-5 Series Service Manual

NSE–5
Troubleshooting
Spectrum analyser
RX Connector X501
Pout = +7 dBm,1747.8
MHz
PCN TX
OK

Synthesizers

There are three oscillators generating the needed frequencies for
RF–section. 13 MHz reference oscillator, 464 MHz VHF VCO and UHF
VCO.
The frequency range for UHF VCO is
Start WinTesla–Service–Software and
Select: Product
Select: Testing
13 MHz reference oscillator
The 13 MHz oscillator (G701) is controlled by COBBA_GJP (N200). This
13 MHz signal is pulse–shaped and connected to SUMMA (N700) and it is
also buffered, filtered and connected to MAD2 (D300).
Page 36
Yes
Yes
Band
GSM
RF Controls
RX Continuous
Cont. Mode Ch: 60
Technical Documentation
Check
Directional Coupler
(L500)
No TX/RX Switch
(Z504)
Diplexer (Z503)
Mechanical Switch
(X501)
GSM TX: 2012.4 ... 2061.6 Mhz,
PCN TX: 1942.2 ... 2016.8 Mhz,
GSM RX: 2012.4 ... 2061.6 Mhz,
PCN RX: 1992.2 ... 2066.8 MHz.
Issue 1 07/99
PAMS