Related Manuals for Telecast Adder 882i
Summary of Contents for Telecast Adder 882i
- Page 1 Adder™ 882i Intercom/Data Multiplexer Instruction Manual Telecast Fiber Systems, Inc. 102 Grove Street Worcester, MA 01605 Tel: 508-754-4858 Fax: 508-752-1520 www.telecast-fiber.com...
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Page 3: Table Of Contents
Table of Contents Introduction Unpacking Installation Rack Mounted Installation Fiber Optic Installation Audio Setup Optical Connections Electrical Connections Intercom Modules 4-Wire Clear-Com RTS/Telex Intercom Replacement Digital Data Power Connections Input Power Fuse Operating Details Battery Charging Indicators Powering Up Theory of Operation Digital I/O Optical Preventive Maintenance... - Page 5 List of Figures Figure 1. Front Panel of the Adder 882i Figure 2. Single Fiber System Figure 3. Other Optical Options Figure 4. Installing the Rack Mount Adapters Figure 5. 4-Wire Setup Controls Figure 6. Main Circuit Board Figure 7.
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Page 7: Introduction
MADE IN USA Figure 1: Front Panel of the Adder 882i Within the Adder 882i unit, the intercom audio signals are first digitized and then multiplexed with the digital data and control signals. The combined electrical signal is converted to an optical signal, launched into the optical fiber and sent on to a second Adder 882i. -
Page 8: Figure 3. Other Optical Options
1550 nm on the same connector. The other unit transmits from the Tx ST connector at 1550 nm and similarly receives at 1300 nm on the same connector. Figure 3 illustrates available optical configurations of the ADDER 882i. Figure 2: Single Fiber operation Figure 3: Other optical options... -
Page 9: Unpacking
Unpacking The Adder 882i System consists of: • Two Adder 882i multiplexer/demultiplexer units • Intercom Modules • Two external power supplies (AC/DC adapters) • Rack mount hardware • Plastic or metal covers for optical connectors Installation Inspect the units for mechanical damage. Inspect all electrical connectors for bent or damaged pins. -
Page 10: Fiber Optic Installation
The setup switches for line or mic input levels are inside on the mother-board of the Adder 882i. Setup steps are not required if all inputs are at the factory default 600 W, 0 dB gain, line level. This would include Clear-Com and RTS intercoms. -
Page 11: Table 2. 4-Wire Inputs
4. With the rear of the unit facing you (connector end), move the slide switches shown in Figures 5 and 6 to match the settings in Table 2. The controls are arranged in pairs. 5. Replace the top cover and gently reinstall the screws. In Figure 5, A refers to the first numbered channel and B refers to the second numbered channel of the pair. -
Page 12: Optical Connections
These are printed On the PC Board Figure 6: Main PCB Optical Connections Refer to Figure 7 before beginning the optical connections. Figure 7: Optical Connectors on the Rear Panel... -
Page 13: Electrical Connections
On a two fiber system, connect the cables so that the Tx at one end connects to Rx at the other end. On a one-fiber system, connect the fiber optic cable to the Adder 882i Tx connector at each end. The Rx ST bulkhead may or may not be installed on one-fiber units. -
Page 14: 4-Wire
4-wire Auxiliary (balanced) 4-wire Auxiliary (balanced) intercoms use an individual 5-pin XLR on each of the two channels in each module. Refer to Figure 8. XLR pin functions are given in Table 3. Intercom Module Gain is 0 dB. NOTE: 50 dB of gain may be added to 4-wire module inputs for MIC level applications via a switch on the intercom Aux-piggyback board. -
Page 15: Rts/Telex
NOTE: When using a Clear-Com external power supply, pin 3 termination must be lifted on the power supply to prevent motor-boating. Clear-Com operations are optimized by the use of the front panel adjustments shown in Figure 9 and listed below: •... -
Page 16: Intercom Replacement
Table 5 lists the RTS/Telex pin numbers and intercom connections. Switches are also provided for: • Dry/unpowered (d), or Wet/powered (w) PORTS • 200 W ON or OFF terminations TERM Figure 10: RTS 2-Wire intercom Module The interface is compatible with powered and unpowered belt packs as well as fixed equipment. -
Page 17: Digital Data
MTA type connectors and they fit all three module types. Use care when inserting and removing these connectors. When using a 4-Wire module, the 3-pin power connector is not used since no power is required. Be careful to locate this jumper in a location where it will not cause an electrical short with other components. -
Page 18: Power Connections
Power Connection When using the standard Telecast power supply, connect the 4-pin XLR connector to the Adder 882i and plug the supply into a 120 VAC line. See Figure Figure 12: Power Connector and Fuse locations Any power supply used with the Adder 882 must supply 1.5 amperes continuous current. -
Page 19: Input Power Fuse
+8dBm MAX LEVEL GAIN OUT NULL 600 Ohm 600 Ohm NULL PORTS PORTS TERM INTERNAL TERM RESERVE POWER POWER ADDER 882i ™ INTERCOM/DATA SYSTEM RECEIVE POWER +8 dBm MAX Telecast STATUS AUXILIARY Fiber Systems, Inc. 4-WIRE DATA/CCU DATA/TALLY MADE IN USA... -
Page 20: Powering Up
The power switches at both units must be on for the system to achieve normal function. 3. Switch on the power to both Adder 882i units. Verify that the green external power LEDs are illuminated, and that the red link status LEDs do not light. -
Page 21: Theory Of Operation
Theory of Operation The Adder 882i circuit block diagram is shown in Figure 15. The unit has two basic functions: multiplexing signals onto an optical fiber, and demultiplexing signals from an optical fiber. The Adder 882i accepts up to ten intercom inputs, eight digital inputs and four remote relay closures and time division multiplexes them onto a single optical fiber. -
Page 22: Digital I/O
Digital I/O The digital input buffer circuits shown in Figures 15 and 16 accept and drive industry standard RS-422, RS-423, and RS-232 signal levels. These circuits may be used to convert from one signal format to another. The digital output circuit shown in Figure 16 can be configured by the user to provide SONY CCU compatible I/O;... -
Page 23: Optical
The optional single-fiber system uses a wavelength division multiplexer to combine and then to separate the two colors used. The main circuits in the Adder 882i are described in Table 8. The basic setup is illustrated in Figure 2 on page 8. -
Page 24: Preventive Maintenance
• Prefabricated cables built to custom lengths Troubleshooting If you are unable to resolve the problems with your Adder 882i System, call Telecast Fiber Systems, Inc. at 508-754-4858 and ask for our service department. To return a unit for repair, obtain a return material authorization (RMA) number from Telecast service. -
Page 25: Specifications
Specifications Audio Characteristics Input Signal Levels 600 W balanced (low Zin) Unity gain +8 dBm peak +40 dB -22 dBm peak Output Signal Level 30 W, balanced output into 600 Ws Unity gain +8 dBm peak Frequency response @ +8 dBm, from DC to 22 kHz ± 0.2 dB Total Harmonic Distortion From 20 Hz to 20 kHz (@ +8 dBm) <0.05%... - Page 26 Optical Characteristics System Margin Data (1-fiber/2-fiber) Operating Wavelength 1300 nm 1550 nm TX Output into cable -15/-13 dBm -15/-13 dBm RX Sensitivity -28/-30 dBm -28/-30 dBm Power Requirements Voltage 12 to 24 VDC Current 1.5 amperes, maximum @ 13.8 VDC NOTE: Although the units will operate at 12 VDC, 13.8 VDC is required to charge the internal reserve battery.
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Page 27: Warranty
A claim of defect in materials or workmanship in any Product shall be allowed only when it is submitted in writing to Telecast Fiber Systems, Inc. within seven days after discovery of the defect, and in any event within the Warranty Period. No claim shall be allowed in respect of any Product which has been altered, neglected, damaged or stored in any manner which adversely affects it.