1783

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: <50 i2

Nominal Output Level
/Load Impedance: +8 dBm
(Ref. I kHz, 0 dBm = 0.775 Vrms with 600 fl 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 ('fHD): (Ref. I 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)

1786 Output Isolation Transformer Impedance Ratio: 1:1 (600 SZ:600 11)

Frequency Response: (Ref I kHz, + 18 dBm output)
±1 dB: 20 Hz - 20 kHz

Total Harmonic
Distortion (773D): 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 1707C/l TI SC 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 kS2 Input Isolation
Transformer for installation on
existing model 1781A
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: