Schematics

Report No.: I20W00023-WWAN_Rev1
Chongqing Academy of Information and Communication Technology
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Page 527 of 585
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5.7.1 GSM Band Frequency Stability over Voltage Variation Results
Test data：
Band
Reference
channel
frequency
(MHz)
Offset
Voltage (V)
3.4
3.8
4.2
GSM850
GMSK
836.5
Hz
3.61
-1.01
3.41
ppm
0.004
-0.001
0.004
GSM850
8PSK
836.5
Hz
-5.60
-0.78
2.30
ppm
-0.007
-0.001
0.003
PCS1900
GMSK
1880
Hz
1.09
1.77
-1.56
ppm
0.001
0.001
-0.001
PCS1900
8PSK
1880
Hz
2.11
-0.11
-4.01
ppm
0.001
-0.001
-0.002
5.7.2 NB-IoT Band Frequency Stability over Voltage Variation Results
Test data:
Band
Reference
channel
frequency
(MHz)
Offset
Voltage (V)
3.4
3.8
4.2
2
1880
Hz
9.39
-7.61
5.41
ppm
0.005
-0.004
0.003
4
1732.5
Hz
10.91
8.19
5.06
ppm
0.006
0.005
0.003
12
707.5
Hz
0.99
1.02
0.54
ppm
0.0014
0.0014
0.0007
13
782
Hz
1.38
1.25
-1.96
ppm
0.0017
0.0015
-0.0025
26
831.5
Hz
13.18
7.72
-5.93
ppm
0.016
0.009
-0.007