Benutzeranleitung / Produktwartung Cable Explorer TDR Module des Produzenten Sunrise Global
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CE4000 Cable Explorer TDR Module User Manual.
Contents iii CE4000 Cable Explorer TDR User Manual Version B00 March 2004 Pa rt number: MAN-13186-001.
CE4000 Cab le Explorer TDR User Manual iv DISCLAIMER Information in this document is subject to change without notice and does not represent a commitment on the part of Sunrise Telecom Broadband, Inc. The software and/or hardware described in this document are furnished under a license agreement or nondisclosure agreement.
Contents v Contents Chapter 1 General Information ............................................... 5 Introduction ..................................................................... 5 Instrument Overview ..............................................
CE4000 Cab le Explorer TDR User Manual vi Interfaces ................................................................................ 54 Power ...................................................................................... 54 Display ..........
Chapter 1 General Information 7 Chapter 1 General Inf ormation INTR ODUCTION The CE4000 TDR (Time Domain Reflectometer) module is for use with the CM1000 Cable Modem System Analyzer.
CE4000 Cab le Explorer TDR User Manual 8 CM1000 MAINFRAME AND CE4000 MODULE 1. Mainframe Input/Output The mainframe I/O section, located at the top of the unit, provides a female RS-232 9-pin connector (DB-9) for a serial computer interface.
Chapter 1 General Information 9 6 6 3 4 1 5 CM1000 MAINFRAME CE4000 Module LED Status Lights Color Display 8 7 F an Outlet RF "F" Connector Slot for Plug-in Module Memory Card Slot Battery A.
CE4000 Cab le Explorer TDR User Manual 10 CE4000 Ke yboar d Functions Figure 1-2 CM1000 keypad Function Keys F1 through F4 Soft keys to perform various tests and setups. Functions are described on the display. SETUP Takes the user to the Main Setup screen.
Chapter 1 General Information 11 HISTORY Not used. (Reserved for a future enhancements) CONTRAST ( ) Activates the up/down arrows to raise or lower the screen contrast level. BACKLIGHT ( ) Turns the screen backlight on or off. VOLUME ( ) Activates the up/down arrows to raise or lower the volume.
CE4000 Cab le Explorer TDR User Manual 12 Figure 1-3 Status Display PREP ARA TION FOR USE Follow the instructions for unpacking and inspecting the CE4000. Compare the received items to the packing list. Read all warnings and information on power requirements.
Chapter 1 General Information 13 Shipment Contents The CE4000 TDR module comes with: • CE4000-01 module • CompactFlash memory card • User manual Charging Instructions Charge the CM1000 before its first use for approximately 8 hours.
CE4000 Cab le Explorer TDR User Manual 14 Safety Precautions Read and follow these safety precautions before connecting the CM1000 with CE4000 module to the cable plant. CAUTION: Do not remove the module from the base unit while it is connected to the cable plant or other equipment.
Chapter 1 General Information 15 First Time Module Installation When installing the CE4000 into your existing CM1000 chassis, please follow these instructions carefully. The CE4000 module is shipped with a replacement CompactFlash memory card. To install the module: Memory Card Memory Card Cover Thumbscrew Figure 1-4 1.
CE4000 Cab le Explorer TDR User Manual 16 7. After turning the power on, a message will be displayed that the CE4000 is loading. This process takes approximately 10 minutes. Once the process is completed, follow the on-screen instructions to cycle power (turn off and back on).
Chapter 2 Setup 17 Chapter 2 Setup GETTING ST ARTED Power Up To Self Test Screen Press the Power button. The green power LED will light as the unit boots up and performs its self-test.
CE4000 Cab le Explorer TDR User Manual 18 The blue bar at the top of the screen provides current status information for the module. The current screen name is shown on the left side of the banner. In the center of the bar, the battery status is displayed.
Chapter 2 Setup 19 SETUP OVER VIEW All Setup menus for the CE4000 can be accessed by pressing the Setup key located just below the F1 key on the keyboard or by selecting the System Setup icon on the Main menu. The Main Setup screen is shown in Figure 2-2.
CE4000 Cab le Explorer TDR User Manual 20 Figure 2-3 System Setup Detail SYSTEM The System Setup screen (Figure 2-3) can be accessed at any time by pushing the Setup button on your CE4000 keypad, highlighting the System icon and pushing Enter (F4). The Next Field (F1) key allows the user to move forward through the screen menu.
Chapter 2 Setup 21 TIME & DATE The time and date on the CE4000 is set from the System Setup screen (Figure 2-3). The time and date are in the formats hh:mm:ss and mm, dd, yy.
CE4000 Cab le Explorer TDR User Manual 22 Cable Select Detail To access the Cable Select selection screen (Figure 2-4), press the Setup button on the keypad, highlight the Cable Select icon using the arrow keys and press ENTER (F4).
Chapter 2 Setup 23 Additional functions, as shown in Figure 2-5, are available by pressing the More (F4) key. Cable data may be edited or changed using the Insert (F1), Delete (F2) or Edit (F3) key. Pressing More again returns you to the original Cable Select screen.
CE4000 Cab le Explorer TDR User Manual 24 Figure 2-6 DELETE Press the Delete (F2) key to delete the currently highlighted cable. Note: No warning or confirmation is provided. Data for the highlighted cable is deleted and can only be recovered by re-entering the data.
Chapter 2 Setup 25 Figure 2-7 EXIT Press Exit to return to the Select Cable main screen. Cable Test Cable Test determines the VOP of a cable if the length of the cable is known.
CE4000 Cab le Explorer TDR User Manual 26 Figure 2-8 SET CABLE LENGTH Use the Left/Right arrow keys to adjust the Cable Length displayed to the length of the cable under test. The arrow keys will increment or decrement the numbers displayed slowly when first pressed.
Chapter 2 Setup 27 F IGURE 2-9 CABLE TYPE Use the alphanumeric keypad to enter up to 10 characters to describe the cable type and press Enter. If you press Next Field or Prev Field before Enter, the entry will be lost. Use the ESC key to back up and delete the previous character input.
CE4000 Cable Explorer TDR User Manual 28.
Chapter 3 Measurements 29 Chapter 3 Measurements TDR BASICS Locating Cable Faults The CE4000 TDR has two cable test modes, Auto and Manual. Select the desired icon on the Main menu for the preferred mode of operation. Press the MENU key at any time during operation and the unit will return to the Main Menu screen (Figure 3-1).
CE4000 Cab le Explorer TDR User Manual 30 VOP The velocity of propagation is the speed at which the signal travels on the cable under test. The time required for the television signals to reach the customers is normally not a concern, however some delay is present in the system, due primarily to the delay of the cable and filters in the network.
Chapter 3 Measurements 31 Figure 3-2 Short pulse widths are advantageous for two reasons. First, the time period of the pulse prevents seeing reflections that occur in the time period between the rise and fall of the incidence pulse.
CE4000 Cab le Explorer TDR User Manual 32 energy and a lower frequency and thus more energy is transmitted and less loss is present in the cable. This allows a longer range. The range is dependent on the VOP and pulse width used for the test. A table providing maximum ranges for each pulse width is provided in the Appendix.
Chapter 3 Measurements 33 The amplitude of the reflected pulse is proportional to the return loss of the cable at the fault location plus two times the cable loss between the TDR and the fault. Measuring the reflected pulse from an open or shorted cable and dividing the resultant by two can measure the loss of a cable.
CE4000 Cab le Explorer TDR User Manual 34 Loss (RTL). RTL is the ratio of the reflected signal to the transmitted signal in dB. A 20 dB return loss means that the reflected signal is 20 dB down from the transmitted signal. Manufacturers provide Return Loss specifications for most RF components.
Chapter 3 Measurements 35 farther the reflection is from the TDR, the higher the cable loss. Be sure to increase the TDR’s vertical gain to display any impairments that could be hidden by the cable loss. TDR TESTS WITH THE CE4000 The CE4000 has two basic TDR modes, Auto and Manual.
CE4000 Cab le Explorer TDR User Manual 36 Auto Test Mode When the Auto test mode is selected, the CE4000 TDR will use the last selected cable data (see Setup section) and initiate a series of TDR tests. The initial screen will take several seconds to appear, as the Auto test is being performed.
Chapter 3 Measurements 37 Figure 3-7 DISPLAY The CE4000 color display provides comprehensive information and measurement details. Top Bar - The top bar provides basic unit information, including the current test mode “Auto”.
CE4000 Cab le Explorer TDR User Manual 38 The TDR displays the distance measurement both on the horizontal scale and digitally based on the placement of the M2 marker. M1 is automatically placed at the beginning of the cable under test and M2 is placed at the point of the reflection (fault).
Chapter 3 Measurements 39 The marker is automatically set to the next reflection fault, the vertical and horizontal scales are adjusted and the measurements are displayed. If no faults are found, the CE4000 will display a message over the TDR screen indicating “No Faults“ and the range of the TDR test.
CE4000 Cab le Explorer TDR User Manual 40 PEAK HOLD The Peak Hold (F3) function key will cause the CE4000 display to hold the worst-case peak measurements—both positive (near open) and negative (near short), as shown in Figure 3-10.
Chapter 3 Measurements 41 SAVE The Save (F4) function key freezes the current screen to allow entering a Site Name for the screen to be stored (Figure 3-11). Up to 10 characters may be entered to describe the screen data. Use the alphanumeric keys to enter the information.
CE4000 Cab le Explorer TDR User Manual 42 Manual TDR Measurements The Manual measurement mode allows you to set manually all of the TDR controls for maximum test flexibility, but requires more than the one-button operation of the Auto test mode.
Chapter 3 Measurements 43 Figure 3-13 Although multiple faults may be present and found on the cable under test, the CE4000 will automatically go to the first cable fault, place the marker at that location and display the distance to the fault. The best practice is always to repair the first fault and retest.
CE4000 Cab le Explorer TDR User Manual 44 Axes - The horizontal and vertical axes depict the distance to the fault and the severity of the fault in dB of Return Loss. The scale of the axes is dependent on automatic or manual settings with the numeric values shown with calibrated tic mark locations.
Chapter 3 Measurements 45 Distance measurements are made at the beginning of the reflection pulse. Position the marker at the point on the TDR trace where the pulse rises quickly. The measured distance will be displayed in the DIST box on the screen. Loss is measured in the same fashion.
CE4000 Cab le Explorer TDR User Manual 46 Figure 3-15 GAIN / POS The Gain/Pos (F3) function key toggles the Left and Right arrow keys to control the horizontal position and range on the CE4000 display.
Chapter 3 Measurements 47 Figure 3-16 Figure 3-17 Using a combination of Gain and Pos, the user can expand the horizontal resolution and view any distance on the horizontal scale.
CE4000 Cab le Explorer TDR User Manual 48 SAVE - The Save (F4) function key freezes the current screen and permits the entry of a Site Name for the screen to be stored (Figure 3-18). Up to 10 characters may be entered to describe the screen data. Use the alphanumeric keys to enter the information.
Chapter 3 Measurements 49 S T ORED F ILES Screens that have been saved may be recalled to the display through the Stored Data icon on the Main Menu. Figure 3-19 Highlight the Stored Files icon from the Main Menu using the arrow keys and press Enter (F4).
CE4000 Cab le Explorer TDR User Manual 50 Figure 3-20 Prev Set - Previous Set (F2) allows the user to scroll backward a page at a time—Page Up. Display - Recalls the stored screen to the display. More - Provides the user with additional functions: Erase, Erase All and More (Figure 3-20).
Chapter 3 Measurements 51 views of the data are available by pressing the Nest (F1) function key to display the next fault or the Adjust (F2) function key to adjust the vertical gain or horizontal gain (range). Two stored files may be compared by pressing the Compare (F3) function key and selecting a second saved file.
CE4000 Cab le Explorer TDR User Manual 52 Figure 3-22 ADJUST The Adjust (F2) function allows adjustment of the Pulse Width using the Up/Down arrow keys, as shown in Figure 3-23. Typically two pulse widths will be stored automatically, depending on the mode and length of cable under test.
Chapter 3 Measurements 53 Figure 3-23 COMPARE The Compare (F3) function key displays a Stored Data screen, (Figure 3-19), prompting the user to select a second saved screen to display.
CE4000 Cab le Explorer TDR User Manual 54 LOAD Load returns the user to the Stored Data screen (Figure 3-19), to select another saved screen to display.
Chapter 4 Specifications 53 Chapter 4 Specifications PERFORMANCE SPECIFICA TIONS AND KEY FEA TURES Horizontal Resolution <2000 ft: at .99 VOP 0.25 ft >2000 ft: at any VOP 1.00 ft Vertical Resolution Bits 14 Pixels 140 Vertical Sensitivity: 62 dB Range Maximum All VOPs 4000 ft Dead Zone 0 ft Distance Accuracy: ± .
CE4000 Cab le Explorer TDR User Manual 54 Environment Min. Operating temperature: 0˚C Max. Operating temperature: 50˚C Humidity: (non-condensing.) 95% Storage temperature: -4 deg F (-20 C) to +140 d.
Chapter 5 Maintenance and Service 55 Chapter 5 Maintenance And Service INTR ODUCTION This section contains information on maintenance and service for the CM1000 Cable Modem Analyzer. Battery Replacement The CM1000 uses a user-replaceable nickel metal hydride battery.
CE4000 Cab le Explorer TDR User Manual 56 GENERAL MAINTENANCE Internal Rechargeable Battery To avoid damaging the internal battery, optimize its life and guarantee a full charge in 6-8 hours, the following steps should be followed: • Let the CM1000 cool to room temperature before recharging.
Chapter 5 Maintenance and Service 57 TR OUBLESHOO TING If the CM1000 fails to operate and no front panel indicators are illuminated, the internal nickel metal hydride battery may be discharged. Use the supplied AC adapter to power the unit and recharge the battery.
CE4000 Cab le Explorer TDR User Manual 58 Insert the new memory card and press it firmly but gently into the slot. Replace the protective cover. Powering the unit on will automatically load the new software into the CM1000. This process may take several minutes depending on the software being loaded.
Chapter 5 Maintenance and Service 59 TECHNICAL SUPPOR T Sunrise is located in the Eastern Time zone with regular office hours from 8:00AM to 8:00PM. A toll free number service covering all of North America is provided at no charge.
CE4000 Cab le Explorer TDR User Manual 60 RETURNING EQUIPMENT TO SUNRISE Sunrise manufactures equipment to very high standards. Products are warranted against defects in materials and workmanship, as specified in our published product warranty. When properly used and operated, your equipment will provide many years of service.
Chapter 5 Maintenance and Service 61 All precautions are taken by Sunrise to ensure that every unit meets all electrical and mechanical specifications prior to returning the equipment to the client.
CE4000 Cable Explorer TDR User Manual 62.
Chapter 6 Appendix: Cable Data 63 Chapter 6 Appendix Additional Cable data Cable T ype Cable Manufacturer VO P Cable Loss.
CE4000 Cab le Explorer TDR User Manual 64 Attenuation Mfg. VOP 750 MHz P3-412 Comscope 87.0% 2.65 dB P3-500 Comscope 87.0% 2.04 dB P3-565 Comscope 89.0% 1.78 dB P3-625 Comscope 87.0% 1.66 dB P3-700 Comscope 89.0% 1.44 dB P3-750 Comscope 87.0% 1.38 dB P3-840 Comscope 89.
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