Altec Lansing 1707C - System Block Diagram and Design Specs; Architects and Engineers Specification

CONFIGURING THE MAINFRAME
The Mainframe's Inner Workings
MODULE OUT "NOMINAL yoyo ‘PEAK’
100mV RM
ZIN-
ek
IN
Tr
1
INPUT OUTPUT MIX OUT
INPUT
with mainframe LEVEL SUM
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33
e
f
a
I
ê a
a
100mY RMS
MUTE f SUMMING |
BUS i
| =
ét — 44) 5
BUZZER P
TONE GEN
YELP å OUTPUT
ODEFEAT QOFF
jo
JOON
COMP/LIM i
PR vy; =]
li
DIN
SHELVING
EQUALIZER
BASS TREBLE
/ ! RELAY
! l
THRESHOLD COMP REL ,
RATIO TIME |
100mY RMS
Z IN - 10K
LEVEL
u E
LINK OUT
O
“LE
C
0.775V AMS
AMPIN
AUX DUT MASTER
POWER
AMPLIFIER
BARRIER
TRANSFORMER STRIP
POWER ON E A
ue a VOLTAGE
POWER SAC UNE SELECTOR |
SWITCH FUSE
100/120/200/220/
240VAC 50/60HZ
JK USER INSTALLED STRAPS
+V VOLTAGE
POWER du RAILS
SUPPLY
ó 6 à i
: S
*48V OC INPUT
1707C/1715C System Block Diagram
ARCHITECT'S and ENGINEER'S SPECIFICATION
The mixer/power amplifier shall have six configurable
ports and be capable of operating from 100, 120, 200,
220, or 240 Vac, 50/60 Hz line, or from +48 VDC.
Each port shall be usable with a microphone or other
high level device. The mixer/power amplifier main-
frame shall include a compressor/limiter, low and
high frequency shelving equalizers, and a tone
generator capable of producing general purpose and
emergency warning signals.
The power amplifier shall meet the following perfor-
mance criteria: Power Output: 75 watts (1707C) at
less than 0.05% THD from 20 Hz to 20 kHz (8 Q direct
output), or 150 watts (1715C) at less than 0.0596 THD
from 20 Hz to 20 kHz (4 2 direct output). Frequency
Response: 20 Hz to 20 kHz, +1 dB (direct output).
Source Impedance: 150 Q to 250 Q nominal with a
microphone preamplifier, 600 Q with a bridging
transformer, 150 (2 to 600 Q with a line matching
transformer, and greater than 30 kQ with a tape
preamplifier. Equivalent Input Noise: «-120 dBr with
a low impedance microphone preamplifier. Output
Noise: «-85 dBm (with all controls off).
The mixer/power amplifier shall be rack mountable
and finished in black. The amplifier's dimensions
shall be 514" (H) x 19" (W) x 12%" (D) and its net
weight shall be 24.2 lbs. (1707C), or 30.8 lbs.
(1715C).
The plug-in accessory modules shall be the 1780A/AT
and the 1781A/AT Input modules and the 1783 Line
Output module. The accessory transformers usable
with the modules shall be the 1785A Input Isolation
transformer and the 1786 Output Isolation transform-
er. The connector subassemblies shall be the 1791
female XLR, 1792 male XLR, 1793 dual phono, and
the 1794 5-lug screw terminal connector.
The mixer/power amplifier shall be the Altec Lansing
Model 1707C/1715C.
ALTEC
LANSING
a MARK IV company
P.O. BOX 26105 e OKLAHOMA CITY, OK 73126-0105 e U.S.A. e 405/324-5311 or FAX: 405/324-8981
© 1992 ALTEC LANSING CORPORATION
PRINTED IN U.S.A. 7/92
Revision 1
42-07-029244