Transcript Green broadcasting networks

Green broadcasting networks
ITU World Radio Day
Geneva, February 13, 2015
Christian Wachter, Product Manager
Rohde & Schwarz Broadcast and Media Division
13.02.2015 | Green Broadcasting networks| 1
FM radio exists in Europe since
66 years – room for innovation
13.02.2015 | Green Broadcasting networks| 2
Innovations since then:
Tubes to transistors, analog to digital,
size reductions, etc.
13.02.2015 | Green Broadcasting networks| 3
Trend for innovation today:
Environmental awareness
13.02.2015 | Green Broadcasting networks| 4
Meaning for the broadcasting
industry
13.02.2015 | Green Broadcasting networks| 5
1. Transmitters: electricity to RF means
radio program on air and heat in room
13.02.2015 | Green Broadcasting networks| 6
2. Amplifiers in transmitter consume
most energy
13.02.2015 | Green Broadcasting networks| 7
How to improve:
Doherty technology
13.02.2015 | Green Broadcasting networks| 8
A little bit technology
13.02.2015 | Green Broadcasting networks| 9
Peak power –
high efficiency
Average power –
low efficiency
DAB+ signal: Large headroom – low
efficiency
13.02.2015 | Green Broadcasting networks| 10
Exciter
Main
PA
Pout
RF
Peak
PA
Amplifier
Amplification for main and peak signals is separated
Main amplifier amplifies average signals (class A/B)
Peak amplifier amplifies peak signals (class C)
lower headroom in main amplifier required
No energy required in peak amplifier as long no peaks are in the signal
13.02.2015
| Green Broadcasting
11
 100% improvement
compared
to oldnetworks|
amplifiers!
Main PA
Peak PA
13.02.2015 | Green Broadcasting networks| 12
Is there environmental awareness is broadcasting?
Efficient transmitters =
Green Broadcasting networks
13.02.2015 | Green Broadcasting networks| 13
Thank you
All pictures under GNU license or property of Rohde&Schwarz
13.02.2015 | Green Broadcasting networks| 14