LTE Interference into Digital TV Systems (Report)

[DANORM]

LTE Interference into Domestic Digital Television Systems

Cobham Technical Services
ERA Technology RF and EMC Group

Report Version: Draft Report v2

1. Introduction 25
2. Objectives 25
3. Test Setup 26
3.1 Wanted Signal Parameters 26
3.2 Interference Criterion 28
3.3 Unwanted Interference Parameters 30
3.3.1 LTE BS 30
3.3.2 LTE UE 33
3.4 Conducted Measurements 36
3.4.1 Equipment Setup 36
3.4.2 Test Procedure 37
3.5 Radiated Measurements 40
3.5.1 Domestic setup 40
3.5.2 Additional Sky digital box tests 44
4. Conducted Results 44
4.1 Wanted Signal of -70 dBm 44
4.2 Wanted Signal of -50 dBm 46
4.3 Wanted Signal of -30 dBm 48
4.4 Wanted Signal of -20 dBm 50
4.5 Wanted Signal of -12 dBm 52
5. Radiated Results 55
5.1 Outdoor Aerial 55
5.2 Indoor Set Top Aerial 57
5.2.1 iDTV receiver 57
5.2.2 iDTV receiver with a silicon tuner ST1 59
5.2.3 iDTV receiver with a silicon tuner ST2 61
5.2.4 PVR receiver 62
5.2.5 STB receiver 63
5.2.6 STB via the RF output of a PVR receiver 65
5.3 Outdoor Radiated Measurements 67
5.4 Sky Digital Box 70
6. Summary and Conclusions 72



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