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June 27th 06, 12:46 PM
posted to rec.radio.amateur.homebrew
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Spurs on mixer output
Scott wrote: Have you looked at the 44.545 MHz injection signal with the spectrum analyzer? What do you see there? Any spurs on it? I'm not exactly sure how you have it set up...are you saying you have disconnected the output of the 1st mixer so that it doesn't reached the 2nd mixer? If so, what does the 44.545 signal mix with to get the 455 KHz 2nd IF? Also, if the input to the 2nd mixer is simply disconnected, is the input port of the 2nd mixer terminated somehow? Also, are you feeding the proper level of 44.545 to it (not overdriving it are you??)? Not sure what level is required for the SBL-1. +7 dBm. Leon |
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