Samsung SGH 600, Service Manual

Page: 19 / 74

Samsung Electronics 3-3
Specification
3-3 Synthesizer Specification
3-3-1 General Specification
- Frequency Hopping : 1 Channel to < 3 o rms in
< 500 mS
- Phase Noise: < 3 o RMS
3-3-2 IF Synthesiser
- Synthesizer Frequency: 540 MHz
- Output Signal Drive Level: -10 dB
- 2nd IF LO Output Frequency FIR: 45 MHz
3-3-3 FIR Output
- 1st IF: 225 MHz
- 2nd IF: 45 MHz
- FIR Frequency: 45 MHz
- FIR Level: -17 dBm
3-3-4 Phase Noise Specification
3-4 Receiver Specification
3-4-1 Front-end Specification
- Input Frequency range: 935 MHz ~ 960 MHz
- Gain: 18 dB
- If Frequency range: 540 MHz
- Input Impedance: 150 ½
- Output Load: 1 k½
- Overall Sensitivity: -106 dBm for 9 dB S/N
in 180 kHz
3-4-2 Sensitivity
- Reference Sensitivity Level: -102 dBm
- Channel Width : 180 kHz
- Input Thermal Noise: -121.4 dBm/Hz
- Ouput S/N: > 9 dB
- Noise Figure: < 7 dB
3-4-3 Intermodulation
- Input Useful Signal: -99 dBm
- Interferer: -49 dBm at ± 800 kHz and 1600 kHz
3-4-4 Selectivity
Offset (kHz) Phase Noise (dBc/Hz)
± 200 < -75
± 250 < -78
± 400 < -105
> 600 < -105
> 1200 < -105
> 1800 < -113
> 3000 < -115
> 6000 < -121
> 10.0 MHz < -124
> 20.0 MHz < -129
> 30.0 MHz < -134
Signal Type Level
Useful Signal GMSK - 82 dBm
Cochannel GMSK - 9 dBc
± 200 kHz GMSK + 9 dBc
± 400 kHz GMSK + 41 dBc
± 600 kHz GMSK + 49 dBc