FUNCTION DESCRIPTION : 

The White and Pink noise outputs of the 923 Random Noise/Filter module produces continuous bursts of random frequencies and wave shape throughout the audio spectrum. White noise distributes amplitude evenly throughout the indicated audio spectrum. Pink noise displays equal amplitude/energy per octave. A resultant lower frequency concentration for Pink Noise marks the difference between the two outputs, with White noise appearing in even intensity trhoughout the audio spectrum.

The two manual sweep filters, Lowpass and Highpass, are single pole circuits with a frequency cutoff slope of 6dB per octave.

ELECTRONIC SPECIFICATIONS : 

Noise source nomimal Output impedance : 600Ω

Average output level : White : -10dBm / Pink : -4dBm

Peak to peak Voltage Excursion at Output : 5 Volts

Lowpass Filter :

Input Impedance : 22kHz

Output Impedance : 330Ω

Attenuation of slope above fc : 6dB

output noise : -85dBm

Frequency Range : 10Hz to 10kHz

Highpass Filter :

Input Impedance : 22kHz

Output Impedance : 330Ω

Attenuation of slope below fc : 6dB

Output Noise : -70dBm

Frequency range : 10Hz to 10kHz

Power supply requirements : +12V@35mA / -12V@35mA