But if the switching frequency was say.... 30-40khz, wouldn't the sidebands be so far out of range so as not to cause interferance. RoD KD0XX
--- On Fri, 1/2/09, John B. Stephensen [email protected] wrote:
From: John B. Stephensen [email protected] Subject: Re: [amsat-bb] RH and LH CP simutaniously To: "R. Chastain" [email protected], "Amsat-BB" [email protected] Date: Friday, January 2, 2009, 6:30 PM
You can use a 90-degree hybrid splitter/combiner to produce LHCP and RHCP for two receivers. Switching will produce sidebands at the switching frequency and alias undesired signals into the receiver passband.
----- Original Message ----- From: "R. Chastain" [email protected] To: "Amsat-BB" [email protected] Sent: Friday, January 02, 2009 23:15 UTC Subject: [amsat-bb] RH and LH CP simutaniously
Hi all, Has anyone ever considered the possibilty of using PIN diodes and a free running square wave oscillator to electronically switch between RHCP and LHCP? The switching frequency would have to be high enough so as to not introduce a tone to the signal.
Just a thought I have had for awhile.
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