BBC的回复：
Dear ------------------,
My sincere apologies for the delay in responding to your e-mail that you sent to me via the BBC Chinese Section (December 2004).
As you no doubt already know, VT Communications is the transmission company responsible for transmitting BBC services around the globe. We work closely with the BBC to try and provide the best quality services possible for their listeners.
Your mail regarding the BBC Chinese service was very concise, and also very useful. We have a dedicated Scheduling and Frequency Department who work constantly to try and maintain and improve the quality of delivery, however you will be more than aware of the problems that we encounter in China. We have noted all your points you made in your e-mail and we are currently looking for more suitable frequencies on which to run the alternations.
It is always useful to have feedback from listeners, especially when the information is of such high quality. I hope that we will be able to improve the 'alternating frequency' transmission and make it easier for yourself and other listeners to hear the BBC.
Many thanks,
Kay
Kay Parnell
Customer Relations Manager, BBC Asia Pacific and Europe
VT Communications (Lincoln's Inn Fields, London)
E-mail: kay.parnell@vtplc.com
website: <http://www.vtplc.com/>
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附：我反映问题的Email：
Dear Kay Parnell,I am a listener of BBC Chinese. I got your Email address from
BBC Chinese Service to tell you my concerns about the recent
frequency change of BBC Chinese. A few weeks ago BBC changed
the 1100-1530GMT transmission on a fixed frequency of 7330
kHz of BBC Chinese to randomly on 7330 or 7550 or 7570. I
suppose that this is to avoid heavy jamming by Chinese
broadcasting authorities. But this does not work very well.
First, 7550 and 7570 kHz are so high in 41m shortwave band
that most common radios cannot reach them. Only very
expensive radios can do so. Normally, frequencies in 41m band
are from 7100 kHz to 7500 kHz. So 7550 and 7570 are both out
of this range. Therefore, most listeners cannot listen to BBC
on 7550 and 7570.
Secondly, Chinese jamming signals are also quite flexible.
According to my listening these days, it usually takes only
30-40 minutes for the Chinese jamming to find out whether the
signal of BBC Chinese today is on 7330 or 7550 or 7570. Then
heavy jamming comes onto that found frequency and it is no
longer easy for listeners to listen to the remaining 4-hour
broacasting.
Thirdly, according to most listeners' experience, Chinese
jamming is always heavier on lower frequencies such as in 49m
and 41m bands than on higher frequencies such as on 31m 25m
19m 16m bands. 7330, 7550 and 7570 are all in 41m band, which
means they all are enjoying a high level of jamming. But
My suggestions are as follows: To avoid China's heavy
jamming, change 7330 to higher frequencies but not 7550 or
7570. It can only be changed into 31m or 25m bands
considering higher frequencies lead to fading in winter. And
the transmission should be devided into two time periods.
Between 1100-1300GMT there is a frequency and between 1300-
1530GMT there should be a different one. Between 1100-1300GMT
the 7330 signal now can be changed into 25m band. Frequencies
like 11630, 11955, 12055 (These are only examples. But I have
checked these frequecies that they do not have signals on
them.) would work. However the signal would also be
differently set day by day randomly on those frequencies.
Between 1300-1530GMT it can be set onto 31m band. Frequencies
like 9525 9635 9660 are all available according to listeners'
listening.
If you cannot change the signal into 31m or 25m bands
immediately, at least please do not transmit on 7550 or 7570
any more. Let it be on 7330. However, I still hope you can
change the signal into 31m and 25m. Just have a try to
avoid/reduce jamming! If it still does not work very well, we
can turn back or use other ways.
Your sincerely,
listener "Hating Jamming" 2004-12-14
［此帖子已被 痛恨干扰 在 2005-2-18 20:46:44 编辑过］
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