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G8HQP Dave · 10th Dec 2017, 10:24 pm

In the case of AM and DSB there is no difference between a 'modulator' and a 'mixer'. The terms are completely interchangeable.

The resistance measurements suggest that ports A and C are transformer coupled, and port B goes straight to the diodes. This is fairly common. It means that port B can be used down to DC. What is 'input' and 'output' is largely up to the user, although some ports may have slightly better performance in one role. To get the idea, look at a MiniCircuits catalogue or datasheet.

10th Dec 2017, 10:24 pm	#6
G8HQP Dave Rest in Peace Join Date: Sep 2008 Location: Solihull, West Midlands, UK. Posts: 4,872	Re: Hatfield modulator: info.? In the case of AM and DSB there is no difference between a 'modulator' and a 'mixer'. The terms are completely interchangeable. The resistance measurements suggest that ports A and C are transformer coupled, and port B goes straight to the diodes. This is fairly common. It means that port B can be used down to DC. What is 'input' and 'output' is largely up to the user, although some ports may have slightly better performance in one role. To get the idea, look at a MiniCircuits catalogue or datasheet.