Abstract: A portable, hand-held meter used to measure direct current (DC) attenuation in low impedance electrical signal cables and signal attenuators. A DC voltage is applied to the signal input of the cable and feedback to the control circuit through the signal cable and attenuators. The control circuit adjusts the applied voltage to the cable until the feedback voltage equals the reference voltage. The “units” of applied voltage required at the cable input is the system attenuation value of the cable and attenuators, which makes this meter unique. The meter may be used to calibrate data signal cables, attenuators, and cable-attenuator assemblies.

Abstract: A portable, hand-held meter used to measure direct current (DC) attenuation in low impedance electrical signal cables and signal attenuators. A DC voltage is applied to the signal input of the cable and feedback to the control circuit through the signal cable and attenuators. The control circuit adjusts the applied voltage to the cable until the feedback voltage equals the reference voltage. The “units” of applied voltage required at the cable input is the system attenuation value of the cable and attenuators, which makes this meter unique. The meter may be used to calibrate data signal cables, attenuators, and cable-attenuator assemblies.

Abstract: In many applications for checking electrical circuits, machinery, and power sources, in the home, in the workshop or laboratory, or in the field, it is desirable to quickly determine if a voltage is present. The voltage wand comprises a high input impedance C-MOS amplifier circuit attached to a conductive probe for detecting the presence of an AC, pulsed DC or DC voltage. The C-MOS amplifier circuit is connected to a light emitting diode which lights to indicate the presence of a voltage. To detect AC or pulsed DC, the probe is brought into proximity but not contact with the voltage source and the voltage field is picked up by the probe. To detect DC, a circuit is completed through the voltage source and voltage wand.