User manual DRAKE DIGITAL 550TCP

[. . . ] TM 550TCP Commercial Terrestrial Channel Processor (For use in NTSC systems) Instruction Manual TM is a trademark of the R. L. P/N: 3852459E-09-2004 Printed in the U. S. A. ii Caution Statements WARNING: TO PREVENT FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE TO RAIN OR MOISTURE ¡WARNING! RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE POWER SUPPLY COVERS NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL An appliance and cart combination should be moved with care. Quick stops, excessive force and uneven surfaces may cause the appliance and cart combination to overturn. The lightning flash with arrow head symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. [. . . ] (3. 2 Kg). 2 Front Panel Controls/Rear Panel Connections F1 F2 F3 F4 F5 F6 F7 Front Panel Controls and Indicators 550TCP TERRESTRIAL CHANNEL PROCESSOR A / V RATIO OUTPUT LEVEL 4 POWER 4 SIGNAL 7 8 OUTPUT ENABLED INPUT CHANNEL OUTPUT CHANNEL Figure 1 F1 POWER Indicator - Lights when the unit is connected to a source of AC power. F2 INPUT CHANNEL Number Switch - Sets the input channel number for off air TV channels 02 through 69. F3 SIGNAL Indicator - Lights to indicate that an input signal is being received as set by the input channel switches and is of a signal strength greater than approximately -10 dBm. Note that if this indicator is off (no received signal), the RF output is switched off. Both input carriers must be at their nominally specified levels. R3 COMPOSITE IF OUT Connector - This is the composite IF output from the IF circuits. The composite IF provides a vestigial sideband filtered visual carrier at 45. 75 MHz (plus or minus any input signal offset) combined with a level controlled aural carrier at 41. 25 MHz (plus or minus any input signal offset). This connection is normally cabled directly to the "COMPOSITE IF IN" connector (see Item R2). R4 RF INPUT Connector - This is the input to the channel processor circuits for all signals with video carrier frequencies in the range of 54 through 806 MHz. R5 FUSE Holder - Always replace this fuse with one of the same type and rating: 1/2 Amp, 250 V, SLO-BLO, 5 x 20 mm type. R6 LINE CORD - This is a three-wire power cable. When the cable is connected to a properly wired AC power line outlet, this cable grounds the instrument cabinet. Connect to a nominal 115 VAC ±10%, 60 Hz source. Do not defeat the safety purpose of the attached line cord plug. Installation CONNECTIONS AND CONTROLS ­ All connections to and from the 550TCP are made through the rear panel. Figure 3 shows a typical two channel processing installation involving the converting of off-air signals. Additional channels can be processed by using additional channel processor units and either multi-port combiners or combinations of two-port combiners. INSTALLATION NOTES ­ Level adjustment provides optimum performance in multichannel installations. The channel processor outputs should be checked periodically with a spectrum analyzer to maintain a ±1 dB variation of adjacent channel carriers. Aural/Visual (A/V) ratios should be held to ­15 dB or less. The `Output Level' and `A/V Ratio' controls are used respectively to make these adjustments. If an output level of less than +50 dBmV is required, add an attenuator of the appropriate value to the modulator output. Example: For an output level of +45 dBmV, add a 12 dB attenuator pad to the modulator output and set the output level. 3 RACK MOUNTING ­ Adequate ventilation is very important in multichannel installations. [. . . ] DRAKE will make note of any shipping damage upon receipt. You will need to send proof of purchase to receive warranty service. Typically, a copy of the invoice from an R. L. The warranty is for the original owner only and is not transferable. Warranty One Year Limited Warranty 7 R. L. [. . . ]