Altec Lansing 1700C User Manual

Specifications and Main Features

Key Features:

Six connectors are now available for input or output sources
In the entire system, a remote muting function exists
The compressor / limiter is integrated
Equalizers of shelving type are low and high
Volume control from a distance
Four tone generator: Sounds
Installation in the rack is provided

Key System Specifications:

Frequency Response:
Main output: 20Hz-20kHz +- 1db
Preamp output: 20Hz-20kHz +- 1db
Link output: 20Hz-20kHz +- 1db
Total Harmonic Distortion (THD):
Main output: <0.03% (Ref.+10 dBm.Output)
Preamp output: <0.03% (Ref.1kHz 0.775 Vrms. Output)
Link output: <0.03% (Ref.1kHz 100 mVrms.Output)
Input Sensitivity:
1780A/1780AT (balanced, no pad) 0.3 to 100 mVrms(-68dBu to – 18dBu)
1780A/1780AT (balanced, with pad) 3mv rms to 1vrms(-48 dBu to+2 dBu)
1781A (balanced) 0.3 to 100 mVrms(-68 dBu to-18 dBu)
1781AT (balanced) 0.1 to 30mVrms(-78dBu to-28dBu)
Link input (unbalanced) 100 mVrms(-18 dBu)
Input Impedance:
1780A: 10kOhm
1780AT: 10kOhm
1781A: >8kOhm
Employing 1781AT: 200 2 - 600 2
Rated Output Level:
Main Output (balanced, LINE position): +10 dBm
Main Output (balanced, MIC position): -40 dBm
Preamp Output (unbalanced): 0 dBu
Link Outpuut (unbalanced): 100 mVrms (-18dBu)
Signal-to-Noise Ratio:
Main Output: >85 dB
Preamp Output: >75 dB
Link Output: >75 dB
Equalization:
Bass: +12 dB in 100 Hz
Treble: +12 dB in 10 KHz
Compressor/Limiter:
Threshold: -20dB – +20dB
Compression Ratio: 1:1 – 0:1
Release Time: 50 msec – 5 sec
Tone Generator:
Tones: Buzzer, siren, single tone and repeating tone chime
Power Requirements:
AC Mains: 100, 120, 200, 220 or 240 VAC 50/60 Hz
Battery: +48 VDC bipolar, maximum 0.5 amps
Operating Temperature Range: Enabling environment to temperature upto 50°C (122°F)
Dimensions:
Width: 19 Inches (48.3cm)
Height: 5.25 inches (13.3cm)
Depth: 13 Inches (33.0cm)
Net Weight: 15 lbs (6.8 kg)
Finish Color: Black
Included Accessories: Operating/ Service Instruction, Rubber Feet, System Configuration Label, International Voltage and Fuse Decals

Frequently Asked Questions

Q: What are the requirements for supplying power to the 1700C Mixer/Preamplifier?

A: The unit can operate on any voltage standard from 100 to 240 V, with the frequency of either 50 or 60 HZ, alternatively it can be powered using a +48 VDC bipolar battery.

Q: What is the maximum number of input channels that the 1700C provides support to?

A: The Mixer has a maximum capacity of six available input channels.

Q: What characteristics does the built-in compressor/limiter as such posses?

A: The operational amplifier has a feedforward structure, an adjustable compression ratio ranging from unity to zero, and a release time adjustable from 50 msec to 5 sec.

Q: Is it possible to utilize the 1700C Mixer/Preamplifier for operational usage in remote locations?

A: The device meets the precondition owing to providing remote volume control functionality and remote muting facilities.

Q: Specify the type of features equalisation facility being extended by the 1700C.

A: Provided with shelving equalizers of low and high frequency which has a maximum boost of +12 DB at 100 Hz and 10 kHz respectively.

Q: Is it possible to extend the system further so as to enable more than 6 inputs?

A: The possible available options are to link numerous 1700C mainframes so as to enhance the number of inputs available.

Q: Is the 1700C Rack Mountable?

A: The device is made rack mountable and associated hardware is provided.

Q: What are the highest possible limits for the operating temperature of the examination station that is classified as 1700C?

A: The upper thermal limit for operability is rated at 50 degrees centigrade or 122 degrees Fahrenheit.

Q: What included accessories come with the mainframe?

A: The accessories that are affixed are an Operation/service instruction manual, four pads which are made out of rubber, a label for system configuration, and decals with international voltage and fuse specifications.

User Manual

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