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SAGE-300
Speech Audio Gain Equalizer

3 Bands Designed for Speech		0 to 8 Volt P-P Input
Audio Equalization
		Low Power Consumption
High Pass Filter Removes
CTCSS Sub-Audible Tones		3 dB Bandwidth 275 Hz to
		4.4 kHz (Passband)
Meets EIA de-emphasis
Specifications		+ / - 10 dB Boost and Cut
		Adjustable Band Control
Easy to Install

The SAGE-300 will enhance and balance the tone quality of your communication repeater system by enabling you to cut or boost, by 10 dB, three audio speech bands.   The low frequency cutoff is at 250 Hz, which prevents sub-audible CTCSS tones from being passed on for equalization.  Measured at the - 3dB points, the audio speech passband is from 275 to 4,400 Hz.  Three separate trim potentiometers enable the user to boost the amplitude of the low (275 - 1,000 Hz), mid (1,000 - 2,600 Hz), and high (2,000 - 4,400 Hz) bands.

Ideal for HF, VHF, UHF and link transmitter applications, the SAGE-300 will compensate for the short comings in audio section of your communications system.  Many microphones, link radios, and transmitters, have less then optimal audio characteristics.  Audio degradation problems are compounded in linked or interconnected systems.   The SAGE-300 enables you to easily balance your audio to ensure the highest quality of communications.    Audio performance is significantly improved on all modes of modulation, including: SSB, AM, wide and narrow band FM.  Total harmonic distortion is less than 0.01% @ 1 kHz. 

When used for telemetry purposes it will allow the audio path to be bandwidth limited and it will improve DTMF twist problems associated with interconnected systems.   The SAGE-300 also enables users to adjust Narrow Band FM radios to meet the new EIA de-emphasis specification (6dB per octave de-emphasis curve).  Many receivers being used today do not meet this specification, which results in un-natural and hard to understand audio.

SAGE-300 Specifications

Parameter	Symbol	Min.	Max.	Units
Operating Voltage   (12 VDC  Typical)	VSUP	10	18	VDC
DC Current Draw	ISUP	7	12	mA
Input Impedance	ZIN	10K	10K	Ohms
Output Impedance	ZOUT	150	150	Ohms
- 3 dB Frequency Bandwidth	FBW	275	4,400	Hz
Low Frequency Boost BW	FBW_L	275	1,000	Hz
Mid Frequency Boost BW	FBW_M	1,000	2,600	Hz
High Frequency Boost BW	FBW_H	2,000	4,400	Hz
100 Hz CTCSS Filter Cut		-25		dB
150 Hz CTCSS Filter Cut		-15		dB
200 Hz CTCSS Filter Cut		-10		dB
250 Hz CTCSS Filter Cut		-6		dB
Low Band Center Frequency	Fc_L	500	500	Hz
Mid Band Center Frequency	Fc_M	1,700	1,700	Hz
High Band Center Frequency	FC_H	2,800	2,800	Hz
Total Harmonic Distortion @ 1 kHz (+/- 0 dB)	THD	-	0.01	%
Audio Input Amplitude	VIN	0	8.0	V P-P
Gain	AG	-10	+10	dB

Absolute Maximun Ratings

Ambient Operating Temperature	0º to 70º C
Maximum Supply Voltage (diode protection)	18 VDC
Power Dissipation	220 mW

Mechanical Specifications

SAGE-300 -The Speech Audio Gain Equalizer

Price $149.95

   Link to Installation Instructions