Telex SR-400, ST300 User Manual

ACCESSORIES

A NL-4S Neckloop Assembly

(for use with hearing aids equipped with telecoils)

B HED-2 Collapsible Lightweight

Headphone

C HED-3 Full Cushion Noise Reduction

Headphones

D AFC-1 Under Chin Eartube

(for use with CMT-98 and Telethin Earphone Driver)

E ES-1 Ear Speaker
F DEB-2 Dual Earbud
G SEB-1 Single Earbud
H CCS-12 Replacement Cushion Covers

(Package of 12, for SEB-1, DEB-2 and HED-1 earbuds)

I HED-1 Ultra Lightweight Headphone
J HM-2 Head Worn Mic
K PH-21 Noise Canceling Head Worn Mic
L OLM-10 Mic

(Supplied with PST-170)

M HGA-1 1/2 Wave Dipole Gain Antenna

A

with cord

with cord

D

G

SPECIFICATIONS

72.1, 72.2, 72.3, 72.4, 72.5, 72.6, 72.7, 72.8, 72.9, 74.7, 75.3, 75.4, 75.5, 75.6, 75.7, 75.8, 75.9 MHz

There are 17 standard frequency options for the following products:

ST-300 17-channel TranSmiTTer (CATALOG NO. 71912-000)

RF Frequency Range 72 to 76 MHz

Modulation: FM ±25 KHz deviation

Signal-To-Noise Ratio 58 dB (77 dB with E.D.R.)

Maximum Deviation ±25 KHz

Audio Input Balanced XLR-3F and unbalanced 1/4”

Antenna 1/4” wave telescoping omnidirectional

Audio Controls Audio input level, monitor jack volume, E.D.R.

Power Requirements 13-20 Vdc or 12 Vac; 115Vac 60 Hz @ 300 mA
plug-in wallpack power supply

Dimensions H 1-3/4” (4.5 cm) x W 7-1/2” (19.2 cm) x
D 5.9” (15 cm)

FCC ID B5DM522

Backlit LCD Display Ch., Freq, Audio Meter, Input setup,
RF level, and E.D.R.

RF Output Power @ 3M
Normal 25K µV/m
High 80K µV/m

B

E

F

C

I

J

M

H

NOT SHOWN RM-S Single Rack Kit

RM-D Double Rack Kit

RECEIVERSTRANSMITTERS

Sr-400 17-channel receiVer (CATALOG NO. 71913-000)

Power Requirements (2) AA batteries, Alkaline, NiMH or NICAD
20 hours Alkaline, 16 hours NiMH, 8 hours NICAD

Audio Frequency Response <3 dB Variation (100 Hz-10 KHz)

Modulation: FM ±25 KHz deviation

Sensitivity 0.5 µV typical, 1.0 µV maximum,12 dB SINAD

Image Rejection >65 dB

Signal-To-Noise Ratio >77 dB with E.D.R.

Distortion <2% T.H.D.

Audio Output @ 10% distortion into 8 Ohms: 2.0V / 15mW 3.0V / 80mV
into 32 Ohms: 2.0V / 10mW 3.0V / 50mW

Antenna Type omnidirectional in earphone cord

Audio Controls

Earphone Connector Type 3.5 mm stereo or mono

Dimensions

Visual Indicators Backlit LCD Channel, Hi Freq, E.D.R.

Charger Contacts Bottom of unit
FCC Complies with Part 15

Volume, On/Off, High frequency boost control, E.D.R.

H 4” (101 mm) x W 2-3/4” (70 mm) x D 1” (25 mm)

K

L

PERSONAL

listening systems

PST-170 17-channel TranSmiTTer (CATALOG NO. 71914-000)

Audio Input Characteristics Mic TA4M connector, 7.75 mV RMS input
for ±25 KHz deviation. Impedance, 10K Ohms,
nominal. Aux. Input, Female 3.5mm. 100mV
Unbalanced, 100K Ohm nominal

Antenna Permanently attached trailing wire

Modulation: FM ±25 KHz deviation

Frequency Response (System) 100 Hz to 10,000 Hz

System Signal-To-Noise 58 dB (77 dB with E.D.R.)

Pre-emphasis 115 µ seconds

Maximum RF Power 80K µV/m @ 3 m

Power Requirements (2) AA batteries, Alkaline, NiMH or NICAD
8 hours Alkaline, 8 hours NiMH, 4 hours NICAD

FCC ID B5DM521

In accordance with Federal Communications Commission (FCC) rules and regulations, Telex
SoundMate personal listening systems are intended only for use in providing auditory assistance to
the handicapped and are not intended for use by the general public.

Americas Telex Communications Inc. 12000 Portland Ave South, Burnsville, MN 55337, USA
USA Phone: [phone], Fax: [phone]
Canada Phone: [phone], Fax: [phone]
Latin America Phone: [phone], Fax: [phone]

©2004 TELEX COMMUNICATIONS, INC. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. PA-20652 USA 6/04

Sr-50 receiVer (CATALOG NO. 71155-XXX*)

Power Requirements (2) AA batteries, Alkaline, NiMH or NICAD

Audio Frequency Response <3 dB Variation (100 Hz-10 KHz)
Sensitivity 0.5 µV typical, 1.0 µV maximum,12 dB SINAD
Signal-To-Noise @ 1 mV Input >60 dB
Distortion <2% T.H.D.
Audio Output @ 10% distortion into 8 Ohms: 2.0V / 15mW 3.0V / 80mV

into 32 Ohms: 2.0V / 10mW 3.0V / 50mW
Antenna Type omnidirectional in earphone cord
Controls Volume/On/Off Switch
Dimensions H 4” (101 mm) x W 2-3/4” (70 mm) x D 1” (25 mm)
Visual Indicators Red LED On Indicator
Earphone Connector Type 3.5 mm stereo or mono
Charger Contacts Bottom of unit
FCC Complies with Part 15

* The last three digits in the transmitter catalog number (XXX) will be determined

by the frequency that is selected.

30 hours Alkaline, 20 hours NiMH, 10 hours NICAD

The

RECEIVERS

Personal Listening System

Telex SoundMate™ personal listening systems help
overcome background noise and poor building acoustics
that can make listening difficult for the hearing
impaired listener. A Telex base station, portable belt
pack transmitter, your choice of receivers, and a wide
assortment of accessories allow you to meet the
needs of individuals who require hearing assistance.
These listening systems are even compatible with
a variety of hearing instrument styles for hearing aid
users. Let Telex, the acknowledged leader in personal
assistive listening products, help you select the
system that’s right for any listening environment.

AUDIO SOURCE: Amplifier, Direct Microphone, or Mixer.

System Versatility - A sound system amplifier,
mixer or wired microphone can plug directly into
the ST-300 base station transmitter. The ST-300
then sends the audio signal to an unlimited
number of personal receivers.

TRANSMITTERS

TOP

THE SR-400 17 CHANNEL RECEIVER

solution to multiple transmitter hearing assistance

TOP

SR

FRONT

THE SR-50 SINGLE CHANNEL RECEIVER

reception and the simplicity of a fixed channel.
This economical receiver operates on one of 17 fixed
narrow-band frequencies in the 72-76 MHz band. Ergonomic
raised volume control knob make level adjustments easily
accessible by feel. Recessed headphone jack provides extra
protection for earphone connections. Two AA batteries give
up to 30 hours continuous battery life.

400

provides clear

systems. The SR-400 features an advanced digital PLL
synthesizer to tune all 17 narrow-band frequencies offered
in the 72-76 MHz band and a backlit LCD display. The
receiver also includes a special high frequency contour
filter and boost switch to increase the intelligibility of
the audio signal, and E.D.R. for increased dynamic range.
Additional features include a battery saving automatic
power shutoff when the earphone is unplugged.

TOP

SR

is the perfect

50

FRONT

BACK

FRONT

ST

300

ST-300 TRANSMITTER The ST-300 Base Transmitter

features 17 user selectable frequencies digitally controlled
from the front panel control buttons, a headphone jack
with adjustable level for input signal monitoring, and a
backlit LCD display that shows Channel, Frequency and
Audio Input Level. On the back of the unit is a balanced
XLR-3F as well as an unbalanced 1/4” input. Front panel
controls and LCD display allow the user to select mic, line,
and 70 volt input options, attenuate the input levels and
change hi/low RF transmit power. A new feature called
Enhanced Dynamic Range (E.D.R.) works with the SR-400
receiver to provide clearer, more dynamic audio.

FRONT

PST

170

THE PST-170 BELT PACK
TRANSMITTER

Transmitter may be set to any one of the
17 channels which is displayed on the
backlit LCD, and operates on frequencies
in the 72-76 MHz band. It is lightweight,
battery operated and includes a small lapel
microphone for convenient portable use.
The PST-170 has two audio input jacks.
The Auxiliary input is designed to allow the
use of audio devices such as teacher’s aids
or tape players. The second jack is normally
used with a microphone and is located on
the top panel. The PST-170 is also compatible
with the E.D.R. feature of the SR-400.

The PST-170 Belt Pack

SYSTEMS

SM

2

SM-2 SYSTEM Includes:

(1) ST-300 base transmitter,
(4) SR-50 receivers
(4) SEB-1 earbuds
(1) SoundMate wall plaque.

(SM case sold separately).

SMP

2

SMP-2 SYSTEM Includes:

(1) PST-170 portable belt pack transmitter
(6) SR-50 single channel receivers
(6) HED-2 collapsible headphones
(14) AA Alkaline batteries
(1) Deluxe system carrying case
(1) HM-2 head worn microphone
(1) User manual for SR-50 and PST-170

BATTERY

CHARGER

THE BC-100

BATTERY CHARGER

charges two SR-50’s,

SR-400’s or PST-170’s

or any combination

of transmitters

and receivers.