Telex IC-S Reference Manual

GENERAL DESCRIPTION
output Impedance:
Phones: 60 ohms (Designed for use with
The IC-S is a single-channel speaker station
150-600 ohm phones.)
designed for use with an external microphone.
There are four versions of the IC-S; all identified
Output Power:
by the same model name, but distinguished from
Phones: 75 milliwatts into 150 ohms.
one another by certain features. For purposes of
Speaker: 2 watts into 8 ohms.
documentation, the four versions will be
Line: 10 milliwatts ($10 dBM).
designated according to features as follows:
1.
IC-SF: Wall-mounted station without light
signal (no indicator light on front panel).
Speaker Acoustic Output:
100 dB SPL at 1 meter on axis at full power.
2.
IC-S: An IC-SF mounted in a carrying case
Total Harmonic Distortion:
with rear panel audio connectors.
Mic to line: 1% at 10 milliwatts.
Line to phones: 1% at 75 milliwatts.
3.
IC-SF/LS: Wall-mounted station with light
signal (has indicator light on front panel).
Common Mode Rejection:
4. IC-S/LS: An IC-SF/LS mounted in a
Line: 40 dB at 60 Hz.
c a r r y i n g c a s e w i t h r e a r p a n e l a u d i o
connectors. Voltage Gain:
Mic t o line: 200 (46 dB).
Line to phones: 24 (28 dB) adjustable t o zero.
/
I
\-/
Speaker Attenuation:
With mic only connected: 0 dB.
With headset connected (mic
+
phones): 6 dB.
SPECIFICATIONS
With -10 switch: 10 d~ (non-LS units only).
With headset and -10 switch: 16 dB (non-LS
Frequency Response: units only).
Transmit: 150-7,000 Hz +1, -3 dB.
Receive: 180-6,000 Hz +1, -3 dB for phones.
Power Requirements:
200-5,000 Hz usable for speaker.
Voltage: 24 Vdc nominal. Will operate o n
Equivalent lnput Noise:
Mic Input: 2 microvolts (-1 16 dBV)
150-7.000 HZ.
lnput Level:
Mic: 5 millivolts nominal, 12 millivolts
maximum.
Line: 1 volt (0 dBM) nominal, 4 volts (12 dBM)
maximum.
Input Impedance:
Mic: Greater than 5,000 ohms. (Designed for
use with 50-600 ohm microphones).
.
Line: Greater than 10,000 ohms. Transformer
coupled.
/'
12-30 Vdc.
Current: No signal
-
25 milliarnps.
Average talk
-
60 milliamps.
Signalling (LS units only)
-
60 milliamps.
Dimensions (connectors not included):
IC-S, IC-S/LS: 10.25 inches (260.35 mm) wide
x 7.7 inches (195.6 mm) high x 3.75 inches
(95.25 mm) deep.
IC-SF, IC-SF/LS: 9 inches (228.6 mm) wide x
7 inches (177.8 mm) high x 2.75 inches
(69.85 mm) deep behind front panel. If unit is
installed using screw-clamp terminals, wire
wrap pin may be cut off; depth reduces to
2.38 inches (60.45 mm).