Name: doble M4000 series
Brand: doble
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Operating Procedure of Type C Resonating Inductor

3-30 72A-1230 Rev. F

July 22, 2005

NOTE When the telephone plug is not connected to the Coupling Box, the lower

terminal of the Coupling Capacitor is connected to the Test Set Guard

Circuit. When the telephone plug is inserted into the receptacle, the

Guard connection to the lower terminal of the Coupling Capacitor is

removed and ground is applied to the low end of the 600 Ohm resistor via

the barrel of the telephone plug.

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doble M4000 series Specifications

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