Nokia NKC-1X Series, Technical Documentation Manual

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CCS Technical Documentation System Module
NKC-1X
Issue 1 02/03

Nokia Corporation Page 49
ing on zero IF. SAW filter guarantees 14dBc attenuation at alternating channels, which
gives acceptable receiver IMD performance with only moderate VHF local phase noise
performance. The local signal's partition to receiver selectivity and IMD depends then
mainly on the spectral purity of the 1st local. Zero 2nd IF stages include most of receiv-
ers signal gain, AGC control range and channel filtering.
Table 23: RF Characteristics
ITEM NMP Requirement TDMA, AMPS 800
RX frequency range, DAMPS 800 869.01...
893.97
LO frequency range 2009.1...
2059.2
1st IF frequency 135.54
Channel NBW, RF 28.6
IF 1 3dB roll off min. frequency (+-?f) 13
2nd IF min. 3dB bandwidth 16 / IQ-branch
Max total group delay at 3dB bandwidth
C/N for sensitivity, digital
analog 7
3.5
C/I for selectivity, digital
analog 8
4
Sensitivity, digital mode static ch (BER < 3%)
ANALOG MODE (sinad >12dB) -110 (min.)
-116 (min.)
Adjacent channel selectivity, digital
analog 13
16*
Alternate channel selectivity, digital
analog 45
65*
IMD attentuation selectivity, digital
analog close spaced (60/120)
analog wide spaced (330/660) 65
65*
70*
Cascaded NF, digital
analog < 9.5
< 9.5
Cascaded IIP 3, digital 120/240, 240/480 kHz
analog 60/120 kHz
analog 330/660 kHz > -7.7
> -17*
> -8*
Available receiver gain digital/analog 85 (min.)
RF front end gain control range, AGC 1 step 20
1st IF gain control range, AGC 2 step 30
R X 2nd IF gain control range, 8x6dB steps 42
Min signal level at RX-ADC input @ sensitivity
digital
analog
-31
-25
Input dynamic range -116... -20