Alexandra Palace - Ofcom TX Visualiser

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Alexandra Palace

North London · Capital Xtra · 107.1 MHz

Historic names: Choice FM, Choice 107.1 (licence AL000255)

Antenna pattern

In-use horizontal pattern

ERP field: In-UseERP/HP = 28.1 W

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 17 dB attenuation; relative ERP 2% of peak 10°: 17 dB attenuation; relative ERP 2% of peak 20°: 15 dB attenuation; relative ERP 3.2% of peak 30°: 9 dB attenuation; relative ERP 12.6% of peak 40°: 6 dB attenuation; relative ERP 25.1% of peak 50°: 4 dB attenuation; relative ERP 39.8% of peak 60°: 2 dB attenuation; relative ERP 63.1% of peak 70°: 1 dB attenuation; relative ERP 79.4% of peak 80°: 0 dB attenuation; relative ERP 100% of peak 90°: 1 dB attenuation; relative ERP 79.4% of peak 100°: 2 dB attenuation; relative ERP 63.1% of peak 110°: 4 dB attenuation; relative ERP 39.8% of peak 120°: 6 dB attenuation; relative ERP 25.1% of peak 130°: 9 dB attenuation; relative ERP 12.6% of peak 140°: 15 dB attenuation; relative ERP 3.2% of peak 150°: 17 dB attenuation; relative ERP 2% of peak 160°: 17 dB attenuation; relative ERP 2% of peak 170°: 17 dB attenuation; relative ERP 2% of peak 180°: 17 dB attenuation; relative ERP 2% of peak 190°: 17 dB attenuation; relative ERP 2% of peak 200°: 15 dB attenuation; relative ERP 3.2% of peak 210°: 9 dB attenuation; relative ERP 12.6% of peak 220°: 6 dB attenuation; relative ERP 25.1% of peak 230°: 4 dB attenuation; relative ERP 39.8% of peak 240°: 2 dB attenuation; relative ERP 63.1% of peak 250°: 1 dB attenuation; relative ERP 79.4% of peak 260°: 0 dB attenuation; relative ERP 100% of peak 270°: 1 dB attenuation; relative ERP 79.4% of peak 280°: 2 dB attenuation; relative ERP 63.1% of peak 290°: 4 dB attenuation; relative ERP 39.8% of peak 300°: 6 dB attenuation; relative ERP 25.1% of peak 310°: 9 dB attenuation; relative ERP 12.6% of peak 320°: 15 dB attenuation; relative ERP 3.2% of peak 330°: 17 dB attenuation; relative ERP 2% of peak 340°: 17 dB attenuation; relative ERP 2% of peak 350°: 17 dB attenuation; relative ERP 2% of peak

Pattern values are treated as dB attenuation. The outer ring is the lowest attenuation / strongest direction; radius uses field-strength scaling: 10−dB/20.

Best bearing(s): 80°, 260° at 0 dB attenuation.

Deepest restriction(s): 0°, 10°, 150°, 160°, 170°, 180°, 190°, 330°, 340°, 350° at 17 dB attenuation.

In-use vertical pattern

ERP field: In-Use ERP/VP = 100 W

0° 30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° N E S W 0°: 2.5 dB attenuation; relative ERP 56.2% of peak 10°: 1.8 dB attenuation; relative ERP 66.1% of peak 20°: 1 dB attenuation; relative ERP 79.4% of peak 30°: 1 dB attenuation; relative ERP 79.4% of peak 40°: 0 dB attenuation; relative ERP 100% of peak 50°: 0 dB attenuation; relative ERP 100% of peak 60°: 0 dB attenuation; relative ERP 100% of peak 70°: 0.25 dB attenuation; relative ERP 94.4% of peak 80°: 0.5 dB attenuation; relative ERP 89.1% of peak 90°: 0.5 dB attenuation; relative ERP 89.1% of peak 100°: 0.5 dB attenuation; relative ERP 89.1% of peak 110°: 0.5 dB attenuation; relative ERP 89.1% of peak 120°: 0.5 dB attenuation; relative ERP 89.1% of peak 130°: 0.3 dB attenuation; relative ERP 93.3% of peak 140°: 0 dB attenuation; relative ERP 100% of peak 150°: 0 dB attenuation; relative ERP 100% of peak 160°: 0 dB attenuation; relative ERP 100% of peak 170°: 0.5 dB attenuation; relative ERP 89.1% of peak 180°: 1 dB attenuation; relative ERP 79.4% of peak 190°: 2 dB attenuation; relative ERP 63.1% of peak 200°: 2.5 dB attenuation; relative ERP 56.2% of peak 210°: 4 dB attenuation; relative ERP 39.8% of peak 220°: 5 dB attenuation; relative ERP 31.6% of peak 230°: 6 dB attenuation; relative ERP 25.1% of peak 240°: 6 dB attenuation; relative ERP 25.1% of peak 250°: 6 dB attenuation; relative ERP 25.1% of peak 260°: 6 dB attenuation; relative ERP 25.1% of peak 270°: 6 dB attenuation; relative ERP 25.1% of peak 280°: 6 dB attenuation; relative ERP 25.1% of peak 290°: 6 dB attenuation; relative ERP 25.1% of peak 300°: 6 dB attenuation; relative ERP 25.1% of peak 310°: 6 dB attenuation; relative ERP 25.1% of peak 320°: 5.7 dB attenuation; relative ERP 26.9% of peak 330°: 5.5 dB attenuation; relative ERP 28.2% of peak 340°: 5 dB attenuation; relative ERP 31.6% of peak 350°: 4 dB attenuation; relative ERP 39.8% of peak

Pattern values are treated as dB attenuation. The outer ring is the lowest attenuation / strongest direction; radius uses field-strength scaling: 10−dB/20.

Best bearing(s): 40°, 50°, 60°, 140°, 150°, 160° at 0 dB attenuation.

Deepest restriction(s): 230°, 240°, 250°, 260°, 270°, 280°, 290°, 300°, 310° at 6 dB attenuation.

Parameters

Date 17/04/2000
Station Capital Xtra
Area North London
Site Alexandra Palace
Licence AL000255
mb21 Alexandra Palace
MCA map Open Ofcom MCA map
Frequency 107.1
NGR TQ29689006
RDS PS Cap_XTRA
RDS PI C37B
Switched PI C47B
TP/TA
TMC
Lat 51.594469
Long -0.129257
Site Ht 92
In-Use Aerial Ht 97
In-UseERP/HP 28.1 W
In-Use ERP/VP 100 W
Max Dir 100
Licensed ERP/HP 100 W
Licensed ERP/VP 100 W

Pattern values

In-use horizontal pattern

0°10°20°30°40°50°60°70°80°90°100°110°120°130°140°150°160°170°180°190°200°210°220°230°240°250°260°270°280°290°300°310°320°330°340°350°
17171596421012469151717171717159642101246915171717

In-use vertical pattern

0°10°20°30°40°50°60°70°80°90°100°110°120°130°140°150°160°170°180°190°200°210°220°230°240°250°260°270°280°290°300°310°320°330°340°350°
2.51.8110000.250.50.50.50.50.50.30000.5122.5456666666665.75.554