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Discussion Starter · #1 ·
I have an older Sitex sounder (came on a 1998 Grady) and have the operation manual but can't find any info on my question. The unit I have has a separate toggle for a narrow or wide beam that the transducer is plugged into and then a another cable that plugs into the unit.

My question is...how do I change the frequency? The manual says that it has 50, 120, and 200 but does not say how to isolate each frequency. Does the wide/narrow beam represent the 50 vs. 200 frequency. If so, what happens to the 120 Freq. even though it is a little older I know it is a good unit according to everyone I talk to about it. Love some help this evening so I can go play with it a little tommorrow. Thanks.
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