Schematics

Report No.: I20W00023-WWAN_Rev1
Chongqing Academy of Information and Communication Technology
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No. 8,Yuma Road, Chayuan New City, Nan’an District, Chongqing, P. R. China,401336
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Page 524 of 585
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5.6.1 GSM Band Frequency Stability over Temperature Variation Results
Band
Reference
channel
frequency
(MHz)
Offset
Temperature[℃]
-30
-20
-10
0
10
20
30
40
50
GSM850
GMSK
836.5
Hz
17.61
-18.11
5.83
10.01
-2.12
3.01
-4.11
-3.08
8.78
ppm
0.021
-0.022
0.007
0.012
-0.003
0.004
-0.005
-0.004
0.010
GSM850
8PSK
836.5
Hz
-13.55
-14.20
4.08
-6.55
7.14
2.08
4.44
6.17
-7.02
ppm
-0.016
-0.017
0.005
-0.008
0.009
0.002
0.005
0.007
-0.008
PCS1900
GMSK
1880
Hz
11.51
-10.98
5.71
4.30
-5.00
3.89
-1.42
-4.57
5.11
ppm
0.006
-0.006
0.003
0.002
-0.003
0.002
-0.001
-0.002
0.003
PCS1900
8PSK
1880
Hz
-10.00
-9.71
6.87
3.32
-5.61
-2.10
1.11
-5.10
-3.26
ppm
-0.005
-0.005
0.004
0.002
-0.003
-0.001
0.001
-0.003
-0.002
5.6.2 NB-IoT Band Frequency Stability over Temperature Variation Results
Band
Reference
channel
frequency
(MHz)
Offset
Temperature[℃]
-30
-20
-10
0
10
20
30
40
50
2
1880
Hz
11.36
-15.27
8.02
-7.05
5.98
15.21
8.91
-6.57
10.60
ppm
0.006
-0.008
0.004
-0.004
0.003
0.008
0.005
-0.003
0.006
4
1732.5
Hz
-4.95
3.55
10.58
7.81
-19.3
6.25
-8.05
15.07
7.71
ppm
-0.003
0.002
0.006
0.004
-0.011
0.004
-0.005
0.009
0.004
12
707.5
Hz
-1.76
-0.12
0.47
-4.94
1.66
1.47
0.16
-1.55
0.37
ppm
-0.002
-0.0001
0.0006
-0.007
0.002
0.002
0.0002
-0.002
0.0005
13
782
Hz
-0.94
1.40
-2.39
-5.59
0.47
1.88
0.40
-1.47
0.15
ppm
-0.001
0.002
-0.003
-0.007
0.0006
0.002
0.0005
-0.001
8
-0.0001
26
831.5
Hz
20.98
-12.84
10.75
-13.37
-7.89
15.35
9.68
7.31
-13.66
ppm
0.024
-0.015
0.013
-0.016
-0.009
0.018
0.0116
0.009
-0.016