wrote:
Here's the posish: we have a whole lot of sennheiser wireless kit
running around (microphones) in our church hall. We have a whole lot of
base stations, most of which operate in the same range of frequency.
Now, we have a little recording studio on the side where we record
verious things during meetings - in order to avoid the complicated
wiring, we have been using some of our 'spare' diversity recievers to
pick up the signal running from the wireless tie, hand and headmics.
The problem is that every time we buy new mics its kind of pot luck as
to the frequency range we will get. Is there anyone who makes diversity
recievers that have a wide UHF range so we could buy a whole load and
not worry about the transmitter range? Any thoughts?

Some thoughts:
1. The wider the range possible, the wider the receiver front end has to
be and the wider the transmitter final amplifier has to be. This means
the greater the possibility of interference issues. So you really want
to avoid having to use stuff with too wide a range.

2. You need to stop buying things randomly. When you buy new mikes, you
need to order the range you want. You need to sit down, list out
everything you have right now, and use the calculator on the Sennheiser
website (or a desk calculator) and calculate out all the second and
third order intercepts so you know what frequencies you can use and
which ones you cannot.

3. If you do not have a plan for frequency allocation, and you do not follow
that plan, disaster will eventually result.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."