Telex Microphone USR 100 User Manual

Telex  
Operating Instructions  
USR-100  
 
Table of Contents (continued)  
SH-100 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Battery Test Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Battery Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Channel Select Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Microphone Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Transmit Power Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
LT-100  
Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Battery Test Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Battery Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Microphone Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Channel Select Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Microphone Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Transmit Power Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
System Set-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Antenna Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Antenna Placement for Optimum Range  
and Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Bracket Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Antenna Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Installing Rack Mounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Double Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
Accessories and Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Front Connector Mounting Kit . . . . . . . . . . . . . . . . . . . . . . . 20  
FCC Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
Customer Service Information . . . . . . . . . . . . . . . . . . . . . . . . . 22  
-ii-  
 
GENERAL INFORMATION  
The Telex Model USR-100 Receiver and associated Transmitters is a  
100 Channel, frequency-selectable full diversity system operating within  
the frequency range of 668.0 to 746.0 MHz on specific pre-set frequen-  
cies. Systems consisting of the USR-100 and its companion transmitter  
are capable of operating on at least 5 frequencies in a TV channel  
simultaneously, sometimes more depending on the individual venue.  
Certain frequencies can be combined to form a set of systems compatible  
for simultaneous use. Digital frequency control of the USR-100 permits  
flexibility within a given area and assures confidence in the equipment  
capability.  
FEATURES  
The USR-100 features a pair of unique UP-UP channel slewing push  
buttons that makes channel changing easy. Simply press each button  
until the desired digit appears. A 2 digit 7 Segment LED indicates  
the Channel. If there is any interference from other wireless users or  
a TV station in the area, it is a simple matter to change the USR-100  
frequency. The frequency agility of the USR-100 is also very useful  
for itinerant users and rental customers.  
Prevents channel changes by unauthorized personnel or accident. The  
lockout status is unaffected when the unit is turned off or unplugged.  
The channel display will flash 4 times when the USR is turned on if  
the lockout is enabled. The display will flash rapidly if someone tries  
to change the channel when the lockout is enabled.  
The USR-100 features not only a Tone Coded Squelch on a little used  
tone frequency of 31.250 KHz but also uses RSSI Amplitude  
Squelch. In the case where there is an RF carrier or noise interference  
on the channel, the squelch will not open because there is no accom  
panying tone. The USR-100 must receive the correct tone from the  
transmitter and the RF carrier before the squelch will open.  
-1-  
 
Posi Phase Diversity  
The USR-100 receiver utilizes Telex’s patented Posi Phase auto  
diversity circuit. Unlike other types of diversity which receive with  
only one antenna at a time, Posi Phase utilizes both antennas at all  
times. This results in a stronger signal from the microphone for  
cleaner audio and greater range.  
If the microphone signal begins to go out of phase (a common cause  
of “drop outs” with other types of diversity) the Posi Phase circuit  
adjusts the phase angle between the two antennas’ receiving circuits  
to prevent phase cancellation. This action is indicated by the 0 and  
180 degree diversity lights on the front panel  
Antennas  
There are two TNC type antenna connectors on the rear panel. These  
connectors are superior to the more common BNC connectors, both  
electrically and mechanically. TNC connectors are becoming the  
standard of the industry due to their heavy use in the Cellular Phone  
industry. Quarter wave antennas are supplied for normal use or an  
optional antenna accessory kit can be used to rack mount the anten-  
nas. Optional half wave antennas with coax can be used for remote  
installations. Both antennas must be used as both are active at all  
times, unlike other types of diversity that only use one antenna at a  
time.  
Computer Controlled Channels  
The VCO (Voltage Controlled Oscillator), which is the heart of any  
Phase Locked Loop Receiver, is controlled by an on-board PIC  
microprocessor. Each individual USR-100 RF stage tuning element  
is also under the direct control of the microprocessor. This directs the  
receiver to undergo an “Automatic Self Tune” step each time the  
channel is changed. This is unlike many receivers on the market that  
simply have “wide band” designs that allow interference to enter the  
most sensitive stages of a receiver to cause inter-modulation and  
noise. Other items under processor control are the channel selection,  
spacing and display, the AF and RF displays and diversity operations.  
This marriage of digital precision with real analog sound provides  
the user with the best of both technologies.  
-2-  
 
Displays  
The 7 Segment LED channel display already mentioned (00 to 99).  
2. A 5 segment LED light array for AF, that aids in setting micro-  
phone gains and monitoring receiver microphone and line level  
outputs. Light numbers 4 and 5 have a Peak Hold feature.  
3. A 5 segment LED light array for RF, that aids in checking the  
transmitter and monitoring for the possibility of initial interfer-  
ence.  
4. A 2 segment LED array that indicates diversity action and antenna  
configuration.  
Audio Output  
An XLR type connector is located on the rear panel that provides  
either line level audio or microphone level audio output, which is  
controlled by a slide type switch also located on the rear pane. The  
output level is adjustable with a screwdriver accessible potentiometer  
located on the rear panel.  
Power  
The USR-100 will operate from the supplied AC adapter or any  
nominal 12-15 volt AC/DC 600 mA supply.  
Audio  
The USR-100 audio circuitry is designed to complement the trans-  
mitter audio. A compandor circuit is utilized to enhance the dynamic  
range. A slow turn-on circuit prevents the audio output stage from  
passing noise spikes present during receiver power up conditions.  
-3-  
 
USR-100 Receiver  
Specifications  
RF Frequency Range. . . . . . . . . . . . . . . 668.0 to 746.0 MHz  
Channels . . . . . . 100 (0-99) (within TV Ch. 47/48 & 58/59)  
R.F. Stability . . . . . . . . . . . . . . . . . . . . . . . . 0.005% or better  
Modulation Type. . . . . . . . . . . . . . . . . FM, 40 KHz nominal  
Type. . . . . . . . . . . . . . . . . . Single Conversion, 10.7 MHz I.F.  
I.F. Bandwidth. . . . . . . . . . . . . . . . . 230 KHz at -3 db points.  
Image Rejection . . . . . . . . . . . . . . . . . . . . . . . 65dB or better  
Squelch . . . . . . . . . . . . 31.250 KHz Tone + RSSI Amplitude  
Audio Output . . . . . . . . . . . . Level, 0.775V RMS/100k load  
-20 dBV, 600 Ohm load  
Receiver Sensitivity . . . Less than 0.8 uV for 12 dB SINAD  
FCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . Notification, Part 15  
Diversity . . . . . . . . . . . . . . Continuous Posi Phase Diversity  
Both antennas are fully employed at all times  
to maximize signals.  
RF Selectivity . . . . . . . . . . . . . Tracked Ceramic Resonators.  
Not Broadband.  
-4-  
 
Model SH-100 Transmitter  
Specifications  
Frequency of operation . . . . . . . . . 668.000 to 746.000 MHz.  
(Current models operate in 2 frequency ranges.)  
668.000 to 679.500 MHz and 734.100 to 745.500 MHz.  
Number of Channels . . . . . . . . 100 User Selectable Channels  
in each range.  
Power Output (Terminated). . . 10 mW, High switch setting,  
1.0 mW Low.  
Antenna. . . . . . . . . . . . . . . . . . . . . . . . Permanently attached.  
Modulation . . . . . . . . . . . . . . . . FM, +/- 40 KHz Deviation,  
50 us pre-emphasis.  
Frequency Response (System) . . . . . . . . 50 Hz to 15000 Hz  
Microphone. . . . . . . . . . Dynamic or Electret, + 5 VDC Bias.  
Tone Squelch. . . . . . . . . . . . . . . . . . . . . Full time, 31250 Hz  
DC Power . . . . . . . . . . . . . . . . 2 AA Size Alkaline Batteries.  
Battery Life . . . . . . . . . 9 Hours, High Power, 12 Hours Low  
Low Battery Indicator . . . . Built-in Fuel Gauge, Test Switch  
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . FCC, Part 74H  
Industry Canada, RSS123  
-5-  
 
Model LT-100 Transmitter  
Specifications  
Frequency of operation . . . . . . . . . 668.000 to 746.000 MHz.  
(Current models operate in 2 frequency ranges.)  
668.000 to 679.500 MHz and 734.100 to 745.500 MHz.  
Number of Channels . . . . . . . . . . . . . . . . 100 User Selectable  
Channels in each range.  
Power Output (Terminated). . . . 10 mW, High switch setting,  
1.0 mW Low  
Antenna. . . . . . . . . . . . . . . . . . . . . . . . Permanently attached  
Modulation . . . . . . . . . . . . . . . . . FM, +/- 40 KHz Deviation,  
50 us pre-emphasis.  
Frequency Response (System) . . . . . . . . 50 Hz to 15000 Hz  
Microphone. . . . . . . . . . Dynamic or Electret, + 5 VDC Bias  
Tone Squelch. . . . . . . . . . . . . . . . . . . . . Full time, 31250 Hz  
DC Power . . . . . . . . . . . . . . . . 2 AA Size Alkaline Batteries  
Battery Life . . . . . . . . . 9 Hours, High Power, 12 Hours Low  
Low Battery Indicator . . . . Built-in Fuel Gauge, Test Switch  
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . FCC, Part 74H  
Industry Canada, RSS123  
-6-  
 
Figure 1  
Front Panel  
Power Switch: When turned on, the channel display illuminates and  
one of the diversity lights will come on.  
Channel Select Buttons: Push once to increase display by one. Push  
and hold to increase display more than one. Left button changes  
“10’s”, Right button changes “1’s”.  
Channel Lockout: To enable/disable Channel Lockout function,  
press both channel select buttons simultaneously and hold them in  
until the channel readout stops blinking. When the buttons are  
released, the lockout mode will be the opposite of before. To check  
status of lockout, press one channel button. If the display changes,  
the lockout is disabled. If the display blinks rapidly, the lockout is  
activated.  
Diversity Display: LED’s indicate diversity operation.  
AF Display: A 5-segment three-color LED Display indicates the  
relative modulation of the system.  
RF Display: A 5-segment three color LED Display indicates the  
relative signal strength from the transmitter.  
-7-  
 
Figure 2  
Rear Panel  
Antenna Jacks: Two antenna jacks for posi phase diversity recep-  
tion. Attach an antenna to each jack.  
XLR type jack connects to audio sound system  
Audio Output:  
(Amplifier/Mixer). Pin 1 ground, Pin 2 +, Pin 3 -.  
Audio Adjust: Screwdriver adjustable potentiometer, controls audio  
output. Use supplied screwdriver to adjust to desired level.  
Audio Level: Set switch to match the input characteristics of your  
audio sound system.  
For external AC wall supply adapter (supplied). Will  
Power Jack:  
accept 12-15 volts AC/DC at 600 mA. Plug size is 2.1mm x 5.5 mm.  
Power Cord Retainer: To prevent accidental pull out of the power  
plug.  
-8-  
 
Receiver Set-up  
Connect the supplied AC power adapter to an AC outlet supplying  
105 to 125 volts AC, 60 Hz. The 230 volt export model should  
connect to an AC outlet supplying 210-240 VAC, 50-60 Hz.  
Connect the USR-100 to your equipment:  
Insert a 3 pin female “XLR” audio connector and cable into the  
Audio Output receptacle on the rear of the USR-100.  
Insert the other end of the audio cable into the input of your  
Mixer/Amplifier.  
Set the Audio Level Switch on the USR-100 to match the input  
level of your audio system.  
If utilizing the two 1/4 wave antennas supplied, connect both of them  
to the back of the receiver at a 90 angle as shown in Figure 3. Tighten  
the connectors securely. (If using other types of antennas, refer to the  
placement instructions on page 14 of this manual.)  
Figure 3  
Antenna Mounting  
-9-  
 
Bottom View  
Figure 4  
SH-100  
-10-  
 
SH-100  
Power Switch: Located on the bottom of the handle.  
Battery Test Button: Press to check the remaining life of the  
batteries.  
Battery Meter: The number of segments that light when the Battery  
Test Button is pushed indicate the approximate time of battery life  
remaining.  
Battery Meter  
Number of Lights  
Time Remaining  
High Power  
(alkaline batteries,  
intermittent usage)  
Time Remaining  
Low Power  
(alkaline batteries,  
intermittent usage)  
4 - 3 grn 1 red  
3 - 2 grn 1 red  
2 - 1 grn 1 red  
1 - 1 red  
9 hours or less  
7 1/2 hours or less  
6 hours or less  
2 hours or less  
1/2 hour or less  
12 hours or less  
9 hours or less  
7 hours or less  
2 1/2 hours or less  
1/2 hour or less  
1 - red flashing  
batteries almost dead-  
will not transmit  
batteries almost dead-  
will not transmit  
4 lights flashing  
Channel Select Switches: Control the transmit channel. Must be set  
to match the channel of the receiver.  
Microphone Gain: Controls the gain of the audio circuit to prevent  
under or over modulation.  
Set to high for maximum range. Set to low  
Transmit Power Switch:  
to prolong battery life.  
Set-Up  
NOTE: Do not use carbon-zinc batteries. Ni-Cad batteries may be  
used but will yield shorter run times.  
Unscrew the handle and install 2 “AA” size alkaline batteries. Be  
sure the battery polarity matches the diagram printed inside the  
battery holder.  
Set the transmit power switch to high or low depending on the  
situation and requirements of the venue.  
Screw the handle back on.  
-11-  
 
Top View  
Back View  
Side View  
Figure 5  
LT-100  
LT-100  
Power Switch: Located on the top of the case.  
Battery Test Button: Press to check the remaining life of the  
batteries.  
Battery Meter: The number of segments that light when the Battery  
Test Button is pushed indicate the approximate time of battery life  
remaining.  
wired as follows:  
Microphone Connector:  
Pin 1 Ground  
Pin 2 Mic  
Pin 3  
+5 volt bias  
Pin 4 +5 volt bias fed through a 3K ohm  
resistor for 2 wire electrets.  
-12-  
 
Battery Meter  
Number of Lights  
Time Remaining  
High Power  
(alkaline batteries,  
intermittent usage)  
Time Remaining  
Low Power  
(alkaline batteries,  
intermittent usage)  
4 - 3 grn 1 red  
3 - 2 grn 1 red  
2 - 1 grn 1 red  
1 - 1 red  
9 hours or less  
7 1/2 hours or less  
6 hours or less  
2 hours or less  
1/2 hour or less  
12 hours or less  
9 hours or less  
7 hours or less  
2 1/2 hours or less  
1/2 hour or less  
1 - red flashing  
batteries almost dead-  
will not transmit  
batteries almost dead-  
will not transmit  
4 lights flashing  
Channel Select Switches: Control the transmit channel. Must be set  
to match the channel of the receiver.  
Controls the gain of the audio circuit to prevent  
Microphone Gain:  
under or over modulation.  
Transmit Power Switch: Set to high for maximum range. Set to low  
to prolong battery life.  
Set-Up  
NOTE: Do not use carbon-zinc batteries. Ni-Cad batteries may be  
used but will yield shorter run times.  
Remove the battery door and install 2 “AA” size alkaline batteries.  
Be sure the battery polarity matches the diagram printed inside the  
battery holder.  
Set the transmit power switch to high or low depending on the  
situation and requirements of the venue.  
Replace the battery door.  
Insert the microphone plug into the connector.  
-13-  
 
System Set-Up  
NOTE: Whe employing two or more wireless microphones, the  
transmitters should be a minimum of 10-15 feet away from the  
receiver(s) to prevent “front-end” overload.  
Turn on the receiver. Set the Channel to the number desired on both  
the transmitter and receiver. Check the RF lights. If any light except  
light #1 is on, this indicates interference and another channel should  
be selected. Turn on the transmitter. Speak into the microphone and  
adjust the gain so that the Audio Meter on the receiver just illuminates  
the 0 (or yellow) light on the loudest sounds.  
If necessary, vary the Audio Adjust on the back of the receiver to suit  
your equipment.  
Walk the transmitter through the expected use area to check for  
“drop-outs”. To minimize the chance for drop-outs, read the section  
on antenna placement.  
Antenna Placement  
The antennas and USR-100 should be placed in a location with a clear  
“signal path” to the transmitter. This “path” should be as short and  
free of obstructions as possible. Obstructions, such as walls, ceilings,  
and metal objects, will reduce range and performance.  
Do not rack mount the USR-100 with the antennas attached  
directly on the back of the unit. This will severely decrease the  
range and performance of the system.  
Antenna Placement for Optimum Range and Rack Mounting.  
For better range and when rack mounting, the antennas must be  
located on the front of the rack mounts or use optional ground  
independent antennas and remote mount them. See the accessories  
section of this manual for cable kits to front mount the antennas.  
-14-  
 
Remote mounting antennas will increase the effective reception range  
when appropriately positioned. The two 1/4 wave antennas supplied  
are not ground independent and therefore not appropriate for remote  
mounting. See the accessories section of this manual for remote-  
mountable antenna options.  
The diversity antenna system operates most efficiently when the two  
antennas are separated as much as possible  
The antennas should be mounted so that they are at least 6 feet (2  
meters) apart for best results. They should be at least 2 feet (60 cm)  
from nearby objects.  
Accessories for remote antenna mounting are listed in the back of this  
manual. See Figures 6 and 7 for suggested mounting options.  
Bracket Mounting  
The antenna brackets may be either mounted on mic stands or secured  
to some other object with the hardware provided.  
Figure 6  
Bracket Mounting  
-15-  
 
Figure 7  
Antenna Placement with Accessory Brackets and Cables  
If possible, do not mount the brackets on a wall. See Figure 7 for  
bracket and antenna placement.  
Antenna Connection  
Attach the two antenna cables to the back of the USR-100. Be sure  
the connectors are tightened securely. Route the cable to the antennas  
and attach in the same manner.  
-16-  
 
Installing Rack Mounts  
The USR-100 is supplied with rack mounts for both double and single  
mounting in a 19" equipment rack. For single mounting, the long and  
short rack “ears” are used. For dual mounting, use the short “ears  
and the mid brackets from two USR-100’s.  
Item  
No.  
1
Description  
Rack Ear, short  
2
Mid Bracket  
3
Rack Ear, long  
4
5
6
Screw, #6-32 x 3/8" Phillips, pan head  
Screw, #6-32 x 3/16" Phillips, flat head  
Screw, #10-32 x 3/8" Phillips, pan head  
Figure 8  
Assembly of Rack Mount  
Assembly  
To assemble the rack mount to the unit(s) and install it into a 19" rack,  
proceed as follows:  
Remove the front Phillips head screws from each side of each unit.  
Refer to Figure 1.  
Align the rack ear (Item No. 1 or 3) with the holes on the side of  
the unit. Install the previously removed screws. Insert an additional  
screw (Item No. 4 provided in the parts pack) into the remaining  
hole. Repeat this step for the opposite side of the unit. Tighten all  
screws securely.  
-17-  
 
Double Mounting:  
Align the mid brackets (Item No. 2) with the holes on the adjacent  
sides of each unit.  
Install the previously removed screws. Insert an additional screw  
(Item No. 4 provided in the parts pack) into the remaining holes.  
Tighten all screws securely.  
Place the two assemblies side by side with the mid brackets  
together. (The left bracket should fit above the right so that the  
countersinks are visible.) Install 4 flat head screws (Item No. 5)  
Tighten all screws securely.  
Place the assembly into the 19 inch rack enclosure and insert four  
#10-32 x 3/8" Phillips pan head screws (supplied) in each corner of  
the rack ears and secure to your enclosure.  
-18-  
 
ACCESSORIES AND REPLACEMENT PARTS  
Model CLA-X - 1/2 Wave Antenna  
- for remote mounting  
Model Part No. Band Color Frequency  
CLA-1 870658-1  
CLA-2 870658-2 Yellow  
Blue  
520-564.9 MHz  
565-614.9 MHz  
615-659.9 MHz  
660-689.9 MHz  
690-724.9 MHz  
725-760 MHz  
CLA-3 870658-3  
CLA-4 870658-4  
CLA-5 870658-5  
Red  
White  
Green  
CLA-6 870658-6 Orange  
Model AB-2 Combination Antenna Bracket  
with hardware and 10 foot (3 meter) coaxial cable  
TNC Connectors. Use with Model CAL-X Antennas.  
Order No. 71138000  
1/4 Wave Replacement Antenna  
Part No. 879010  
120 Volt, 60 Hz  
AC Power Supply  
Order No. 730131  
-19-  
 
Model ALP-450 450-900 MHz Directional Log Periodic Antenna  
includes mounting hardware and 10 foot (3 meter) coaxial cable with  
TNC Connectors. 9 1/2" long x 11" high. Unique forward coverage  
pattern increases signal gain up to 5 db. Covers all frequencies and  
increases range.  
Order No. 71147000  
Model UAD-2 Four Way Antenna Splitter  
Order No. 71253000  
Feeds four USR-100’s with just two antennas. Also supplies power.  
Eliminates 3-power supplies and 6 antennas  
Front Connector Mounting Kit  
Part No. 878978  
This kit consists of 4 cable and connector assemblies with “TNC” type  
connectors. They attach to the rack mounts by removing the filler  
plugs and installing a single nut.  
-20-  
 
FCC INFORMATION  
The TELEX Model USR-100 receiver is authorized under Part 15 of  
the Federal Communication Commission. Licensing of TELEX equip-  
ment is the user’s responsibility and licensability depends upon the  
user’s classification, and frequency selected. TELEX strongly urges the  
user to contact the appropriate telecommunications authority before  
ordering and choosing frequencies other than factory preset frequencies.  
The Telex Model SH-100 and LT-100 transmitters are Type Accepted  
under United States Federal Communications Commission Part 74.  
Licensing of Telex equipment is the user’s responsibility and licensabil-  
ity depends upon the user’s classification, user’s application, and fre-  
quency selected. Telex strongly urges the user to contact the appropriate  
telecommunications authority for any desired clarification.  
CAUTION: Any changes or modifications made to the above equip-  
ment could void the user’s authority to operate the equipment.  
-21-  
 
CUSTOMER SERVICE INFORMATION  
If your receiver or transmitter should need servicing under the warranty,  
please contact:  
Customer Service Department  
TELEX COMMUNICATIONS, INC.  
8601 East Cornhusker Highway,  
P.O. Box 5579,  
Lincoln, Nebraska 68505-5579 U.S.A.  
Phone: (402) 467-5321 or 465-7021  
FAX: (402) 467-3279  
All claims of defect or shortage should be sent to the above address. When  
returning items for service, you must provide date and proof of purchase,  
such as a copy of the sales receipt, to establish warranty. A letter should be  
included outlining all symptoms and claimed defects. Information on how  
the equipment was installed and used is very helpful. Please include your  
phone number and return address in case our service technicians need to  
contact you.  
Units that have been modified cannot be accepted for repair.  
Include all information requested by the Service Department. Then pack the  
unit as follows:  
Check the unit to see that all parts and screws are in place. Then wrap it in  
heavy paper or put it in a plastic bag. If the original carton is not available,  
place the unit in a strong carton that is at least six inches bigger in all three  
dimensions than the unit. Fill the carton equally around the unit with resilient  
packing material (shredded paper, excelsior, etc.). Seal it with gummed paper  
tape, tie it with a strong cord, and ship it by prepaid express, United Parcel  
Service or insured parcel post.  
It is very important that the shipment be well-packed and fully insured.  
Damage claims must be settled between you and the carrier and this can delay  
repair and return of the unit to you.  
Telex reserves the right to make changes in design and improvement on its  
product without assuming any obligation to install the same on any of its  
products previously manufactured. Further Telex reserves the right to ship  
new and/or improved products which are similar to the form, fit and function  
of products originally ordered.  
-22-  
 
TELEX COMMUNICATIONS, INC. 8601 East Cornhusker Highway w P.O. Box 5579 w Lincoln, Nebraska 68505-5579  
PN 801585-1  
JUNE 1998  
 

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