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Description
The Altec Lansing 1783 Line Output modules provides the drive capability necessary to interface with other professional equipment. The electronically balanced output stage provides a low source impedance to drive subsequent stages. If transformer isolation is necessary,the module's circuit board accomodates the optional PC-mount 1786 Output Isolation Transformer. The continuously variable output level control is local to the module permitting independent adjustment of each line output.
1783 Specifications
Output Source Impedance: <5012
Nominal Output Level
/Load Impedance: +8 dBm
(Ref. 1 kHz, 0 dBm = 0.775 Vrms with 600 S2 load, output level control at maximum, 100 mVrms input)
Maximum Output
Level: +24 dBm
Frequency Response: (Ref. I kHz, +8 dBm output)
±1 dB: 20 Hz - 25 kHz
Total Harmonic
Distortion (THD): (Ref. 1 kHz, +8 dBm output, output level control at maximum, 30 kHz low pass filter)
20 Hz - 20 kHz: <0.05%
Signal to Noise Ratio: >88 dBm
(Below +8 dBm output, output level control at maximum, A-weighted)
Power Requirements: ±18 VDC at 20 mA (supplied by mainframe)
1788 Output Isolation Transformer Impedance Ratio: 1:1 (600 fl:600 SZ)
Frequency Response: (Ref I kHz, +18 dBm output)
±1 dB: 20 Hz - 20 kHz
Total Harmonic
Distortion (THD): Ref I kHz, + 18 dBm output)
20 Hz - 20 kHz: <0.5%
50 Hz - 20 kHz: <0.1%
Special Ordering Instructions
NOTE: The modules listed below are required for use with the 1700C and must be ordered separate from the mainframe.
Plug-in Input Modules:
1780A Mic/Line Input module
1780AT Mic/Line Input module with 10 kSZ bridging transformer installed
1781A Programmable Input module
1781AT Programmable Input module with model 1785A 600 0 to 10 kSZ isolation transformer installed
1785A 600 fl to 10 kSZ Input Isolation Transformer for installation on existing model 178':A
Plug-in Output Module:
1783 Line Output module
1786 Output Isolation Transformer
Plug-in EQ Module:
8751A Programmable 14-Band EQ module
NOTE: Each module selected requires one of the following connectors also be ordered.•
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