Summary of Contents for Cadco DC2000
- Page 1 B R O A D B A N D E Q U I P M E N T Operating Manual for the DC2000 Digital Agile Down Converter 2363 Merritt Drive Garland, Texas 75041 Phone 972-271-3651 FAX 972-271-3654 800-877-2288...
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Page 2: Table Of Contents
Table of Contents Important Notices Suggestions for Headend Racking and Maintenance Forward: Features and Options Setup & Operating Instructions: DC2000 Setup & Operating Instructions: Dual RS232 Option Panel Views, Front and Rear Questions, Problems, etc. Problem Troubleshooting Guide... -
Page 3: Important Notices
Data, drawings, designs represented and all other material contained herein are the proprietary property of CADCO Systems, Inc., and may not be reproduced or duplicated in any form without written authorization by CADCO Systems, Inc. All material is subject to change without notice or obligation. - Page 4 Reasons for using CADCO Factory Service: CADCO services exclusively CADCO equipment Designed and manufactured your CADCO equipment Knows CADCO equipment better than any other service provider Technicians are trained on all CURRENT and PAST technical product information Technicians use specialized testing and alignment tools designed for...
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Page 5: Suggestions For Headend Racking And Maintenance
Suggestions for Headend Racking and Maintenance CADCO For prolonged equipment life and operating stability, makes the following recommendations: All headends should be installed in an environmentally controlled dust-free room having a nominal temperature of 80 F (26 C) and 60% humidity. The room should be protected from rodents and insect pests. -
Page 6: Forward: Features And Options
FORWARD INTRODUCTION CADCO Systems thanks you for purchasing the Model DC2000 Digital Agile Low Noise down converter. The DC2000 contains the latest in CATV electronics, including synthesized crystal-referenced phase-locked-loop oscillators, microprocessor control, hybrid amplifiers and saw-filtered output. In addition to these features, the DC2000 has Frequency Input with 25 KHz frequency tuning allowing for more accurate tuning then channel-by-channel tuning. -
Page 7: Setup & Operating Instructions: Dc2000
Position the CADCO DC2000 Digital Agile Down Converter in its installation mount or rack Locate the antenna lead or cable drop that will provide the input signal for the DC2000 Agile Down Converter. Ensure that the input signal provides an adequate signal. The recommended input level for... -
Page 8: Input Channel Selection
Connect a Spectrum Analyzer (recommended) or a Field Strength Meter to the F-connector marked “IF OUTPUT” on the rear panel of the DC2000 Agile Down Converter. If the unit is already connected to another device, disconnect that device from the unit. - Page 9 To use the DC2000 for Manual Gain Control determine the signal input level from the input signal source to the DC2000. Keep in mind that the output level of the DC2000 will be reduced approximately by the difference from 0dBmV and the level of your input signal.
- Page 10 Figure 0.1 Connect a Spectrum Analyzer (recommended) or a Field Strength Meter to the F-connector marked “IF OUTPUT” on the rear panel of the DC2000 Agile Down Converter. This Output has a center frequency of 44 MHz. Using the front panel control marked “MGC LEVEL,” adjust the RF output of the unit until a carrier-to-noise level is achieved which is close to the carrier-to-noise level of the input signal.
- Page 11 NOTE: parameters of the modulating signal; setting the IF output level above the recommended level will adversely affect the quality of performance of the DC2000. NOTE: For 8VSB signals the pilot carrier level of the output signal should not exceed +31dBmV.
- Page 12 Figure 0.3 Setup is complete. Remove all test equipment. Reconnect all cables. Reposition the unit in its rack location and secure it. Connect all input and output sources to the unit. Instructions complete.
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Page 13: Setup & Operating Instructions: Dual Rs232 Option
GENERAL SETUP AND OPERATION - DUAL RS-232 REMOTE CONTROL OPTION INTRODUCTION If you have chosen the DUAL RS-232 Remote Control option for your agile unit, CADCO thanks you for your choice. We think you will agree that this option adds many useful capabilities to the product. - Page 14 255 units can be daisy-chained in this fashion. COMMUNICATION The RS-232 option communicates with the CADCO unit by “dumb” terminals, by computers running terminal emulation software or by high level computers with custom software. The CADCO unit automatically recognized the source type. Any leading ASCII character that lies between HEX 00 and HEX 7F will identify the source to be a ‘dumb’...
- Page 15 Figure 2-3 To identify the unit ID of a CADCO product, observe the front panel display at the time the unit is connected to a power source. The display will flash in the following sequence, providing the following information:...
- Page 16 “ENTER SELECTION” field until that field is clear. Each time <ENTER> is pressed, new information will appear in the appropriate field in the menu displayed. CADCO Remote Control Unit Menu v1.94 CADCO UNIT: P379 RS-232...
- Page 17 NOTE: Depending upon whether your CADCO unit is a processor or a modulator, the menu will have slight variations. For example, the menu for the modulator will not display “I” for “Enter New Input Frequency” because a modulator cannot tune an input frequency. Different versions of units with different features may result in similar variations, but all will be understandable from the menu.
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Page 18: Panel Views, Front And Rear
Panel Views Front Panel Rear Panel... -
Page 19: Questions, Problems, Etc
CADCO product. If you need to return the product for any reason, check with your distributor. They may have an exchange or loaner policy in order to minimize any down- time the loss of the unit may cause;... -
Page 20: Problem Troubleshooting Guide
PROBLEM TROUBLESHOOTING GUIDE The guide below covers some typical symptoms; possible associated causes and suggested actions to follow before returning the unit for repair. It is not meant to be all- inclusive. Symptom Possible Cause Suggested Action No Output Unit tuned to output channel different from desired Ensure selected output channel is Weak output (this occurs particularly on the units which have...