LUXKIT M-4D

Commentary

Distortion Analyzer Kit.

High sensitivity strain rate meter can be constructed by combining with M-2V or M-8M, or commercially available high sensitivity AC volt meter.
In particular, when combined with a high-sensitivity AC volt meter such as M-2V, it becomes a full-scale distortion meter with a maximum sensitivity of 0.01%. It is capable of measuring up to 0.0018% distortion rate, which is equivalent to the distortion meter for general amplifier development and adjustment.

The fundamental wave removal filter uses a twin T-type filter, which is well known for its characteristics. In addition, the removal capability is improved by making it a two stage connection, and measurement by manual tuning is possible by using a two stage filter.

Low distortion and low noise impedance converter with discrete configuration is adopted, and high input impedance of 100k Ω in all range is realized.

For measuring the distortion factor, a dummy load is required, especially for power amplifiers, so M-4D comes with a manganin wire that can be used to create an 8 Ω dummy load.
The manganin wire is a special wire used as a standard resistance wire, and a dummy load can be easily manufactured by using an empty bottle.

The panel knob layout gives priority to functional aspects.

Model Rating

Type	Distortion Analyzer Kit
Distortion rate measuring frequency	100 Hz, 1 kHz, 10 kHz
Tuning range	Fundamental frequency ± 3% or more
Fundamental rejection ratio	100 dB or more (0.001%)
Residual strain	-95dB or less (0.0018%)
Input impedance	100k Ω or more
Input voltage	1 V ~ 100 Vrms
Input Attenuator	4 steps of 10 dB and continuously variable 0 to 10 dB
Output impedance	About 2k Ω
Output Voltage (Output released)	+ 20 dB of the fundamental rejection voltage at the input wave
Pwer	Internal : 9 v Battery 006Px2 External : ± 15 ~ 17V/20mA
External dimensions	Width 227x Height 95x Depth 151 mm
Weight	1 kg (Excluding Battery)