CLEAR-COM ENCORE TW-47 TWO-WAY RADIO INTERFACE INSTRUCTION MANUAL
TW-47 Two-Way Radio Interface Instruction Manual © 2007 Vitec Group Communications Ltd. All rights reserved. Part Number 810502Z Rev. 2 Vitec Group Communications, LLC. 850 Marina Village Parkway Alameda, CA 94501 U.S.A Vitec Group Communications 7400 Beach Drive Cambridge Research Park Cambridgeshire United Kingdom CB25 9TP Vitec Group Communications Room 1806, Hua Bin Building No. 8 Yong An Dong Li Jian Guo Men Wai Ave Chao Yang District Beijing, P.R.
CONTENTS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Before you Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Features of the TW-47 System . . . . . . . . . . . . . . . . . . 1-1 Description of the TW-47 . . . . . . . . . . . . . . . . . . . . . 1-2 RF Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Connecting the TW-47 to the Base Station Radio . . .
TW-47 Technical Specifications. . . . . . . . . . . . . . . . . 3-1 Radio to Party Line . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Party Line to Radio . . . . . . . . . . . . . . . . . . . . . . . . 3-1 LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . 4-I Warranty Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-i Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-ii Warranty Repairs and Returns . . . . . . . . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
Please familiarize yourself with the safety symbols in Figure 1. When you see these symbols on this product, they warn you of the potential danger of electric shock if the station is used improperly. They also refer you to important operating and maintenance instructions in the manual. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol alerts you to the presence of uninsulated dangerous voltage within the product's enclosure that might be of sufficient magnitude to constitute a risk of electric shock.
EMC AND SAFETY The TW-47 Two-Way Radio Interface meets all relevant CE and FCC specifications set out below: EN55103-1 Electromagnetic compatibility. Product family standard for audio, video, audio-visual, and entertainment lighting control apparatus for professional use. Part 1: Emissions. EN55103-2 Electromagnetic compatibility. Product family standard for audio, video, audio-visual, and entertainment lighting control apparatus for professional use. Part 2: Immunity.
iv TW-47 TWO-WAY RADIO INTERFACE
1 OPERATION INTRODUCTION Congratulations on choosing this Clear-Com product. Clear-Com was established in 1968 and remains the market leader in providing intercoms for entertainment, educational, broadcast and industrial applications. The ruggedness and high build-quality of Clear-Com products defines the industry standard. In fact, many of our original beltpacks and main stations are still in daily use around the world.
• Separate transmit and receive level control adjustment. DESCRIPTION OF THE TW-47 The TW-47 two-way radio interface is a one-channel unit that is used to connect a two-way radio (commonly known as a walkietalkie) to any channel in a party-line intercom system. When used with remote radios, the radio connected to the TW-47 acts as if it were the base station for a wireless remote system. The illustration in Figure 1-1 shows a typical intercom setup.
The TW-47 should be connected to the intercom station nearest to the person who will be operating the base-station radio. If the unit is being connected directly to the main intercom station, it should, if possible, be connected directly to a separate main station output. RF INTERFERENCE To avoid RFI interference, make sure the base-station radio and the TW-47 interface is well removed from the intercom station to which it is connected (2 to 5 feet / .6 to 1.52 m).
Figure 1-2: Connecting the TW-47 to a Base Station Radio BUILDING YOUR CUSTOM CABLE To connect the base-station radio to the TW-47, you must build your own custom connector cable. This involves several steps. 1. Obtain or make a cable using mini or micro plugs that fit your radio. Use single conductor shielded wire for each cable. Miniature type stereo cable is a good choice. Solder these cables to the DB9 connector as shown in example 1. This cable length should be kept under 5 feet (1.52 m).
3. The most difficult setting is getting your particular radio to key properly. Every radio has a different method of externally keying its transmitter. To determine how to set the jumpers and wire the connector, you need to know what type of external microphone is used in your radio, or you need to experiment. Below are three examples of how to key the transmitter. If you are unsure of which wiring to use, try all three one at a time. Pins 2, 3, 4 and 7 are the relay contacts in the TW-47.
Example 2: Relay in series with the microphone Shield 1 6 2 Tip From walkie-talkie earphone 7 3 8 4 9 Tip 5 To walkie-talkie microphone input Shield Jumper settings J6 On (DC path for mic) J7 Off J8 On (Medium gain mic input) Figure 1-4: Relay in series with the microphone Example 1: Relay across the sleeves of the microphone and earphone connectors Shield 1 6 2 Tip From walkie-talkie earphone 7 3 8 4 9 Tip 5 To walkie-talkie microphone input Shield Jumper settings J6 On (DC path for mic) J7
OPTION SETTINGS Internal switches select the intercom line interface of the TW-47. To access the switches, remove the four screws retaining the top cover and remove it. The switches are located on the PCB on the right hand side of the unit. The switch handles are easily accessible. The settings are as follows: • When the Intercom Compatibility Switch is set to Clear-Com (C-C), intercom audio is on pin 3 of the XLR connector. The DC level call signal is sensed on this pin.
20 KHz Call Signal Adjustment Jumper J8 Jumper J7 Jumper J6 Intercom TW Intercom Compatibility Switch (S1) Channel Switch (S2) TP1 Figure 1-6: Location of Switches and Jumpers on Printed Circuit Board A jumper is set to ON when the left hand two pins are joined (the default position for J6). A jumper is set to OFF when the right hand two pins are joined (the default position for J7 and J8).
TRANSMIT KEY JUMPER For some walkie-talkies or two-way radios, a dedicated power path may be needed to activate their transmit function. If so, set jumper J6 to ON. CALL SIGNAL FREQUENCY ADJUST The 20 KHz call signal detector is calibrated at the factory and should not require further adjustment. If it becomes necessary to correct the frequency adjustment for any reason, this can be done by adjusting the internal potentiometer. Refer to Figure 1-6 for location of the potentiometer.
into the intercom system. Observe the audio level indicators on the TW-47. While speaking on the remote walkie-talkie the green LED should be flashing with some occasional flashes of the red LED. If this is not the case adjust the volume control on the base walkie-talkie to get the desired indication. 3. CHECKING OUT THE BASE STATION TRANSMITTER: From the main station or remote station, turn on the talk button for the channel that the TW-47 is connected to. Press and hold the call button while speaking.
TW-47 FRONT PANEL CONTROLS AND LIGHTS 3 4 2 1 Level Adjust Receive Transmit On Audio Level Over Norm Transmit TW-47 2-Way Radio Interface Figure 1-7: Front View of TW-47 1. RECEIVE LEVEL ADJUST. Use to adjust the receive level of the base station two-way radio when there is no external volume control on the base station radio. CAUTION: The receive level is set at the factory and should be adjusted only if the remote radio does not have its own volume adjustment.
REAR PANEL OF TW-47 5 6 Intercom Two-Way Radio Figure 1-8: Rear View of TW-47 5. INTERCOM LINE CONNECTOR. Use the three-pin female XLR connector on the TW-47’s back panel to connect the unit to the intercom channel. As with other Clear-Com remote stations, power is provided through the cable. 6. TWO-WAY RADIO CONNECTOR. Use the DB-9F connector to connect the TW-47 to the base-station radio.
2 INSTALLATION WIRING CABLES FOR SPECIFIC RADIO TYPES Use the following information to wire cables and set jumpers for specific radios. FOR MOTOROLA: RADIUS, GP300, SP-50, AND SPORT 7X Set jumpers to the following positions: J6, off; J7, on; J8, on. Use the example in Figure 2-1 on page 2-1. To get a molded connector, order Motorola Part#HMN 9787DR headset with swivel boom mic with clamp.
Set jumpers to the following positions: J6, on; J7. off; J8, on. To get a molded connector, order YAESU Part# MH-32 A2B speaker microphone. Shield 1 6 Earphone Tip 2 7 3 8 4 Microphone 9 5 Tip Shield Note: Set J7 and J8 according to transmit gain requirements. Figure 2-2: Yaesu Radios FOR UNIDEN: MODEL SPH; MOTOROLA: RADIUS P50 Set jumpers to the following positions: J6, on; J7, on; J8, on.
3 SPECIFICATIONS TW-47 TECHNICAL SPECIFICATIONS dBu is an absolute measurement. 0 dBu is referenced to 0.775 volts RMS RADIO TO PARTY LINE LINE CHARACTERISTICS Frequency Response Max Gain Distortion Noise Max Level Before Clipping Green LED Threshold Red LED Threshold Input Impedance: 200-20KHz ± 3dB >=-5dBu <=0.
Power Requirements Input Voltage Range Quiescent Current Current with Audio Current with Call 20-30VDC <=40mA <=50mA <=60mA Rear Panel Connectors Rear panel: (1) XLR3F (1) DB-9F Front Panel Controls and Indicators Transmit Audio Level Hi Audio Level Norm Receive Level Adjust Transmit Level Adjust Dimensions (1) Red LED (1) Red LED (1) Green LED (1) Control (1) Control 1.8"H x 3.95"W x 6.4"D (46 mm x 100 mm x 163 mm) Weight 1 lb. 4 oz. (0.
LIMITED WARRANTY Vitec Group Communications (VGC) warrants that at the time of purchase, the equipment supplied complies with any specification in the order confirmation when used under normal conditions, and is free from defects in workmanship and materials during the warranty period.
• UHF wireless intercom systems have a limited warranty of three years. • All other Clear-Com and Drake brand systems and products, including beltpacks, have a limited warranty of two years. The warranty starts at the time of the product’s original purchase. The warranty start date for contracts which include installation and commissioning will commence from the earlier of date of the Site Acceptance Test or three months from purchase.
WARRANTY REPAIRS AND RETURNS Before returning equipment for repair, contact a User Support Center to obtain a Return Material Authorization (RMA). VGC representatives will give you instructions and addresses for returning your equipment. You must ship the equipment at your expense, and the support center will return the equipment at VGC’s expense. For out-of-box failures, use the following contact information: Europe, Middle East and Africa Tel: +44 1223 815000 Email: customerservicesEMEA@vitecgroup.
NON-WARRANTY REPAIRS AND RETURNS For items not under warranty, you must obtain an RMA by contacting the User Support Center. VGC representatives will give you instructions and addresses for returning your equipment. You must pay all charges to have the equipment shipped to the support center and returned to you, in addition to the costs of the repair. EXTENDED WARRANTY You can purchase an extended warranty at the time of purchase or at any time during the first two years of ownership of the product.
LIABILITY THE FOREGOING WARRANTY IS VGC'S SOLE AND EXCLUSIVE WARRANTY. THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY OTHER REQUIRED IMPLIED WARRANTY SHALL EXPIRE AT THE END OF THE WARRANTY PERIOD.
This warranty does not cover any damage to a product resulting from cause other than part defect and malfunction. The VGC warranty does not cover any defect, malfunction, or failure caused beyond the control of VGC, including unreasonable or negligent operation, abuse, accident, failure to follow instructions in the manual, defective or improperly associated equipment, attempts at modification and repair not approved by VGC, and shipping damage.
