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MTH DCS Commander Electrical measurements

JM John MOGR Forum Member

I need

1.) The Commander Base Unit output impedance at the carrier ferquency? I think it is about 2MHz?

2.) The Locomotive input impedance at the carrier frequency?

3.) Verification of the Carrier frequency?  I think it is about 2MHz, My O-scope Doesn't Have a cammera attachment/event capture mode. 

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S stan2004OGR Forum Member

This has been discussed in previous threads but note the MTH signal is not narrow-band like the Lionel 455 kHz signal.  So when it comes to filter design you might find other filter characteristics such as constant group-delay which preserves digital timing in modulated signals may be more important than a sharp filter roll-off passing a specific frequency.  Your mileage may vary.  Just my 2 cents.

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