On Sat, 02 Dec 2006 02:55:04 GMT, Telamon
wrote:

In article ,
David wrote:

On Thu, 30 Nov 2006 14:26:25 GMT, David wrote:

I am building a transmitter combiner for non-conforming wideband FM
signals and need an high-level AGC stage that can control over a 40
dB range and can handle up to 5 Watts input. I have a real clean
final amp http://www.empowerrf.com/docs/1043.doc
but it insists on having a 0 dBm input for full power and minimum
products. Thanks.

I'm leaning toward 2 quad pin diode attenuators in series.

You may want to re-consider that since pin diode attenuators have large
intermodulation products.

Then again you did say it is a non-conforming transmitter.

If you care about intermodulation then go with an electromechanical
type attenuator.

This is for UHF. ''Non-conforming'' is meaning the carriers are not
synched and don't add up cleanly to the sum of their individual
milliWatts. This creates heat in the combiner which can also increase
3rd order products. I'm using this:

http://www.minicircuits.com/pdfs/ZB5CS-920-10W.pdf

As I understand it, pin diode attenuators are pretty clean within a
certain attenuation range. I'd use off the shelf except nobody I can
find makes one that can handle +37 dBm.

This circuit will be used for AGC so we're pretty much locked into an
electronic solution. Thanks.