On Thu, 25 Jun 2009 18:01:02 +0000, Steve Pope wrote:

> Eric Jacobsen <[email protected]> wrote:
>
>>You seem to be looking for a UHF to 70MHz downconverter. There are
>>lots of UHF tuners with 70MHz outputs, but many/most are for broadcast
>>applications and only support bandwidths up to about 8MHz.
>
>>You may be able to find something with a bandwidth as wide as you're
>>asking (80MHz), but I suspect you'll have to look around and it won't be
>>cheap. That's a pretty wide bandwidth and most applications don't need
>>or support that much.
>
> This is why I suggested a quadrature mixer down to baseband. Then the
> output bandwidth is only ~40 MHz. A little googling suggests such a
> connectorized component exists. Dunno about the cost though.
>
> Steve

The quoted 80MHz bandwidth is the 3dB point, so they probably need more
than 40MHz.

Which doesn't much change your conclusion, aside from the fact that they
need to pay attention to their _real_ bandwidth constraints.

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