MP32

Measurements

Typical values measured with an HP8903A Audio Analyser and a Fluke 187 multimeter. Configuration : - Lundhal LL1517 output transformer, 1:1 ratio - 2 x SK47B DOA's - Board supply ±27V, DOA supply ±24V
Measure	Conditions	Value
Iddle supply current	No input signal	V+ : +72mA V- : -72mA
Input impedance	f=1kHz	1.3kΩ
Maximum input level	f=1kHz	+22dBu
Maximum output level before clip	f=1kHz	+29.5dBu
Minimum gain		+7dB
Maximum gain		+62dB
EIN	Zin=150Ω Bandwidth=0-30kHz	-127dBu
EIN	Zin=0Ω Bandwidth=0-30kHz	-132dBu
Frequency response	Gain=+40dB Zin=150Ω Deviation=-1dB	3Hz-220kHz
THD	f=1kHz Gain=+40dB Vout=+19dBu	< 0.0045%
CMRR	f=100Hz	-95dB
CMRR	f=10kHz	-90dB

Signal injected into input XLR, scope on output XLR, going through output transformer.


Small amplitude square wave output f = 1kHz gain = minimum (+7dB) scale = 0.2V/div	Large amplitude square wave output f = 1kHz gain = +40dB scale = 5V/div	Large amplitude square wave output f = 10kHz gain = +40dB scale = 5V/div