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Chapter 4

50

Greenlee / A Textron Company

Test/Difference/Saved Waveform (Manual TDR)

Display the current test waveform, a saved waveform, and a waveform that shows the
difference between the two the same way as in Auto TDR, described in “Test/Difference/Saved
Waveform – Auto TDR” in this chapter. Figure 4-17 shows the test, saved, and difference
waveforms in Manual TDR.

Save/

Load

Vertical

Position

Vp

Setup

Main

Display

Test/Difference/Saved (Manual TDR)

Smoothing is 3 (Go to Setup – More settings to change)

Vp:

0.820

GAIN:

12 dB

PW:

5 ns

RL:

18 dB

:

17.9 ft

DIST:

35.2 ft

Marker On

Marker Off

feet

0

10

20

30

40

50

Figure 4-17: Test/Difference/Saved (Manual TDR)

The current test waveform is displayed in the top half of the waveform display, and the saved
waveform is in the bottom. The difference waveform is displayed between the two source
waveforms, which are displayed in gray. In any operation that involves a saved waveform,
the settings used for the current test waveform are those of the saved waveform. Return-loss
values apply only to the current test waveform.

Note that if the difference waveform is a straight line, there are no differences between the
saved waveform and the current test waveform. You can change the vertical position of the
current test waveform. You can also change the Vp value using

ST

. Changing the Vp value

affects both the test and saved waveforms.

Span

and

Pulse

softkeys are not available from this display.

www.

.com

[email protected]

1.800.561.8187

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Содержание Greenlee CableScout TV220

Страница 1: ...eter for Cable TV 52040565 REV 1 2011 Greenlee Textron Inc 10 11 INSTRUCTION MANUAL Read and understand all of the instructions and safety information in this manual before operating or servicing this tool www com information itm com 1 800 561 8187 ...

Страница 2: ...rs 17 Power Up Settings 17 Chapter 3 Setting Up the Instrument 21 Connecting the Cable 21 Setup Menu 22 More Settings 28 Test Types 30 Chapter 4 Testing a Cable 33 TestWizard 33 Auto TDR 36 Manual TDR 45 Chapter 5 Save Load 55 Save 55 Save Load Preview 57 Transferring a File to a PC 58 Chapter 6 Maintenance 61 Error Messages 61 Inspection and Cleaning 61 Appendix A Speciﬁcations Options and Access...

Страница 3: ...edures for the TV220 CableScout Time Domain Reﬂectometer Keep this manual available to all personnel Replacement manuals are available upon request at no charge Warranty Greenlee Textron Inc warrants to the original purchaser of these goods for use that these products will be free from defects in workmanship and material for one year This warranty is subject to the same terms and conditions contai...

Страница 4: ...ury or death Hazards which if not avoided COULD result in severe injury or death Hazards or unsafe practices which if not avoided MAY result in injury or property damage Read and understand this material before operating or servicing this equipment Failure to understand how to safely operate this tool could result in an accident causing serious injury or death Electric shock hazard Contact with li...

Страница 5: ...for the TV220 t The power charger adapter is not hermetically sealed Do not expose it to moisture t Do not remove covers or panels except to access the battery Do not operate the instrument without covers and panels in place Failure to observe these precautions may result in injury and may damage the unit Battery The TV220 is powered by a rechargeable 10 8 V 2 4 Ah lithium ion battery Only the ent...

Страница 6: ... including TestWizard quickest and easiest way to test a cable Auto TDR most settings are controlled automatically by the TV220 and Manual TDR for the expert user who wants full control over instrument settings Chapter 5 Save Load Detailed instructions on saving and loading data and transferring data to or from a PC Chapter 6 Maintenance Information on maintenance inspection and cleaning of the TV...

Страница 7: ... to add the proper cable type or to create a custom cable type Refer to Choosing the Cable Type in Chapter 3 2 Press Next to display the TestWizard Choose Cable Span menu Use ST to select cable length To be sure that the TV220 locates the event pick the smallest span that is greater than the length of cable you are testing 3 Press Next to display the TestWizard Choose Event Type menu Use ST to sel...

Страница 8: ... t Zoom On expands the waveform around the cursor When zoom is on moving the cursor to a different event causes that event to be redrawn so that it ﬁts in the display without being clipped The event may be magniﬁed or reduced to ﬁt properly in the display t Zoom Off returns the waveform to normal view Press Exit Wizard from any menu or display to exit TestWizard and return to the menu or display y...

Страница 9: ...rrent menu or display of the instrument appears on the top status line of the display above the window This window includes data menu choices or a test waveform depending upon what selections you have made Any additional messages to the operator appear in the dialog text box which is the smaller framed window in the lower portion of the LCD Figure 2 3 A ﬁve level battery status indicator located i...

Страница 10: ...transferring data 3 TESTWIZARD Button TestWizard is one of three ways to test a cable TestWizard is a quick and easy way to run a test Press TESTWIZARD to start a test at any time no matter what menu you are in 4 Scroll Controls The arrow buttons serve the functions of moving the cursor left and right across the displayed waveform or changing values WX scrolling through a menu or changing values S...

Страница 11: ... the TV220 to a computer to download test data Power Up Settings When you press POWER to turn on the instrument the TV220 shows the Main Display The instrument powers up with the same settings in place as when it was powered off Main 1 Connect to cable under test 2 Press Setup to select the cable type or 3 Press Test to use a previous setup Use Up Down to adjust contrast TV220 Lesson Test Setup Re...

Страница 12: ...that to the cable under test t To test loose wires attach the jumper cable to the instrument and then the F type female to BNC male adapter to the free end of the jumper Next attach the BNC female to alligator to that adapter and then the alligator clips to the cable under test This type of connection causes an impedance mismatch and reduces the measurement effectiveness t The F type to KS test ad...

Страница 13: ...ment and reach the Main Display Figure 3 1 Main 1 Connect to cable under test 2 Press Setup to select the cable type or 3 Press Test to use a previous setup Use Up Down to adjust contrast TV220 Lesson Test Setup Reset to Defaults Figure 3 1 Main Display www com information itm com 1 800 561 8187 ...

Страница 14: ... TV220 Test Type Remove Cable Add Cable Cable Lesson More Settings Return to Test Main Display Setup Choose Cable Type User List Use Up Down to select cable type Loss dB 100m 500 MHz Vp Cable Name Current Settings Belden RG 6 U Comm Scope QR 540 Series Comm Scope QR 715 Series Comm Scope 6 Series Times Fiber T10 6 Series Times Fiber T10 500 Series Times Fiber T10 750 Series Trilogy MC2 500 Trilogy...

Страница 15: ... 100m 500 MHz Vp Cable Name Times Fiber T10 412 Series Times Fiber T10 500 Series Times Fiber T10 625 Series Times Fiber T10 750 Series Times Fiber T10 875 Series Times Fiber T10 1000 Series Times Fiber T10 59 Series Times Fiber T10 6 Series Times Fiber T10 611 Series Times Fiber T10 11 Series 7 05 5 68 4 69 3 87 3 38 3 15 17 80 14 50 11 80 9 35 0 870 0 870 0 870 0 870 0 870 0 870 0 850 0 850 0 85...

Страница 16: ...o display the Setup Create Custom Cable Type for User List menu Figure 3 4 Copy to User List Cable Name Delete Cable Loss Vp Done Return to Test Main Display Setup Create Custom Cable Type for User List Use Up Down to select cable to edit Press to create new cable Loss dB 100m 500 MHz Vp Cable Name Current Settings 15 48 0 820 Figure 3 4 Setup Create Custom Cable Type for User List www com informa...

Страница 17: ... Type for User List Cable Name display Figure 3 5 Caps Lock Ok Cancel Delete Cable Name NEW CABLE_ Use Up Down and Left Right to select character to enter 1 2 3 4 5 6 7 8 9 0 Q W E R T Y U I O P A S D F G H J K L _ Z X C V B N M SPACE Figure 3 5 Setup Create Custom Cable Type for User List Cable Name 3 Use WX and ST to move through the characters to the letter or number you want 4 Press 6 to add h...

Страница 18: ... 7 Press Done to return to the Setup Choose Cable Type User List menu where your completed cable type appears on the User List Figure 3 7 Test Type Add Cable Remove Cable Cable Lesson More Settings Return to Test Main Display Setup Choose Cable Type User List Use Up Down to select cable type Loss dB 100m 500 MHz Vp Cable Name Comm Scope QR 540 Series Comm Scope QR 715 Series Comm Scope 6 Series Ti...

Страница 19: ...More Settings menu you can change the following t Distance units choose metric or English distance units for all distance measurements t Velocity of propagation units choose metric or English units for the Vp setting Refer to Appendix B for a deﬁnition of Vp t Language choose the language option for the instrument s menus waveform displays and online help t Display contrast set the display contras...

Страница 20: ... to Feet and Vp Units is set to 0 xxx Press Reset to Metric to reset the current settings to standard metric defaults When Reset to Metric is selected Distance Units is set to Meters and Vp Units is set to m μs Distance and velocity of propagation units are the only selections that are affected by the Reset to U S and Reset to Metric softkeys Press Reset to Defaults to reset the current settings t...

Страница 21: ...istorical data t TEST DIFFERENCE SAVED WAVEFORM displays the current cable test waveform a saved waveform and a waveform that shows the difference between the test and saved waveforms This is another test that lets you compare current data to historical data t INTERMITTENT TEST displays the current waveform plus minimum and maximum waveforms The minimum and maximum waveforms consist of the minimum...

Страница 22: ...and the ﬁnal step is to select the appropriate level of analysis 1 Press the TESTWIZARD button to display the TestWizard Choose Cable Type User List menu Figure 4 1 Next Exit Wizard Main Display TestWizard Choose Cable Type User List Use Up Down to select cable type then press Next Loss dB 100m 500 MHz Vp Cable Name Current Settings Belden RG 6 U Comm Scope QR 540 Series Comm Scope QR 715 Series C...

Страница 23: ...gth To be sure that the TV220 locates the event pick the smallest span that is greater than the length of cable you are testing 5 After selecting the cable span press Next to display the TestWizard Choose Event Type menu Figure 4 3 Next Prev Exit Main Display TestWizard Choose Event Type Use Up Down to select the cable span you are testing then press Next Number of Events Marked Find largest event...

Страница 24: ...e Right Left to move cursor to events Vp 0 820 ERL 0 dB DIST 414 9 ft Zoom On Zoom Off 0 200 100 300 feet 1 2 3 event e possible echo Figure 4 4 TestWizard Measurement Display This display shows a waveform with events of the selected type marked and numbered Use the Zoom On Zoom Off softkey to magnify sections of the waveform for closer viewing t Zoom On expands the waveform around the cursor When...

Страница 25: ...se Cable Type User List Use Up Down to select cable type Loss dB 100m 500 MHz Vp Cable Name Current Settings Belden RG 6 U Comm Scope QR 540 Series Comm Scope QR 715 Series Comm Scope 6 Series Times Fiber T10 6 Series Times Fiber T10 500 Series Times Fiber T10 750 Series Trilogy MC2 500 Trilogy MC2 750 15 48 15 48 4 89 3 90 15 09 14 50 5 68 3 87 4 86 3 38 0 820 0 820 0 880 0 880 0 850 0 850 0 870 ...

Страница 26: ...n and Manual Lesson softkeys are available from this menu Press these softkeys for detailed instructions on Auto and Manual TDR 5 Next use ST to select the test type The TV220 can perform ﬁve types of tests in Auto TDR t TEST WAVEFORM the most common type of test displays a waveform for the current cable test Use this test to characterize document and troubleshoot cables t SAVED WAVEFORM displays ...

Страница 27: ...ble Save Load Setup Main Display Test Auto TDR Use Up Down to change Gain Vp 0 820 GAIN 12 dB PW 1 ns ERL 2 dB DIST 40 9 ft Marker On Marker Off Zoom On Zoom Off Events On Events Off 0 50 100 feet Figure 4 7 Test Auto TDR Use WX to position the cursor on the left edge of the event The distance to the event is displayed in the DIST box in the lower right corner of the display In Auto TDR the follow...

Страница 28: ...Use Up Down to change Gain Vp 0 820 GAIN 12 dB PW 1 ns ERL 24 dB DIST 174 2 ft Marker On Marker Off Zoom On Zoom Off Events On Events Off 0 50 100 150 200 feet 1 2e 3e Figure 4 8 Test Waveform Auto TDR with Event Marking The following functions are controlled automatically in Auto TDR t Vertical position of the waveform t High pass ﬁlter high pass ﬁlter reduces the front end bandwidth so the wavef...

Страница 29: ... 4 9 Test Auto TDR with Event Marking In the above example the RL for this event is 25 dB ERL equals RL 25 dB minus the cable loss Note that a smaller return loss value represents a bigger event To measure RL and ERL 1 Select the type of return loss measurement you want or turn off return loss in the Setup More Settings menu Figure 3 8 2 Use WX to position the cursor on the left edge of the event ...

Страница 30: ...he Save Load menu 4 Use ST to select the waveform 5 Press Return to Test to display the saved waveform Figure 4 10 Save Load Setup Main Display Saved Auto TDR Use Up Down to change Gain Vp 0 670 GAIN 12 dB PW 1 ns ERL 20 dB DIST 1 4 ft Marker On Marker Off 0 4 8 12 16 20 feet Figure 4 10 Saved Auto TDR When displaying a saved waveform any setup changes that would affect the waveform are disabled T...

Страница 31: ... 4 11 Save Load Setup Main Display Test Saved Auto TDR Vp 0 670 GAIN 12 dB PW 1 ns ERL 0 dB DIST 32 7 ft Marker On Marker Off 0 10 20 30 40 feet Figure 4 11 Test Saved Auto TDR The current test waveform is displayed in the top half of the waveform display and the saved waveform is in the bottom half The test waveform is scaled the same as the saved waveform and displayed with a common cursor Test ...

Страница 32: ...2 dB PW 1 ns ERL 0 dB DIST 32 7 ft Marker On Marker Off 0 10 20 30 40 feet Figure 4 12 Test Difference Saved Auto TDR The current test waveform is displayed in the top half of the waveform display and the saved waveform is in the bottom half The difference waveform is displayed between the two source waveforms which are displayed in gray In any operation that involves a saved waveform the settings...

Страница 33: ... On Zoom Off Events On Events Off feet 0 10 20 30 40 50 Figure 4 13 Intermittent Auto TDR This display is the same as in Auto TDR Test except that in addition to the current test waveform minimum and maximum waveforms are displayed in gray The minimum and maximum waveforms are made up of the minimum and maximum values for each data point on the current waveform The minimum and maximum waveforms pe...

Страница 34: ...of test displays a waveform for the current cable test Use this test to characterize document and troubleshoot cables t SAVED WAVEFORM displays a saved waveform t TEST SAVED WAVEFORM displays the current cable test waveform and a saved waveform Use this test to compare current data to historical data t TEST DIFFERENCE SAVED WAVEFORM displays the current cable test waveform a saved waveform and a w...

Страница 35: ...nce from zero DIST and distance from the marker Δ The marker is always set at the current cursor location t Vertical Position of the waveform can be changed using ST The 6 button toggles between auto and manual positioning when this softkey is highlighted t Span or test distance of the cable can be increased and decreased using ST t Vp can be increased and decreased using ST The TV220 uses Vp to c...

Страница 36: ...a method of reducing random noise by averaging test results over a period of time Higher smoothing provides a cleaner waveform but slows down the response time of the instrument You can set smoothing values in the Setup More Settings menu Figure 3 8 The TV220 can measure Return Loss RL and Event Return Loss ERL in Manual TDR just as in Auto TDR Refer to Return Loss and Event Return Loss in this ch...

Страница 37: ...p Main Display Saved Manual TDR Smoothing is 3 Go to Setup More settings to change Vp 0 820 GAIN 12 dB PW 5 ns RL 15 dB 17 9 ft DIST 35 2 ft Marker On Marker Off feet 0 10 20 30 40 50 Figure 4 15 Saved Manual TDR When displaying a saved waveform in Manual TDR Vertical Position Span and Pulse are not available and the softkey labels for these functions are blank All test settings are from the saved...

Страница 38: ... 40 50 Figure 4 16 Test Saved Manual TDR The current test waveform is displayed in the top half of the waveform display and the saved waveform is in the bottom half The test waveform is scaled the same as the saved waveform and displayed with a common cursor Test settings are those of the saved waveform Return loss values apply only to the current test waveform All test settings are from the saved...

Страница 39: ... Manual TDR The current test waveform is displayed in the top half of the waveform display and the saved waveform is in the bottom The difference waveform is displayed between the two source waveforms which are displayed in gray In any operation that involves a saved waveform the settings used for the current test waveform are those of the saved waveform Return loss values apply only to the curren...

Страница 40: ...ng is 3 Go to Setup More settings to change feet 0 50 100 150 200 Figure 4 18 Intermittent Manual TDR This display is the same as in Manual TDR Test except that in addition to the current test waveform minimum and maximum waveforms are displayed in gray The minimum and maximum waveforms are made up of the minimum and maximum values for each data point on the current waveform The minimum and maximu...

Страница 41: ...ta for later use press the Save Load softkey to display the Save Load menu Figure 5 1 Preview Save Delete Return to Test Main Display Save Load Use Up Down to select waveform ID Waveform Name No Saved Traces 000 001 002 003 Figure 5 1 Save Load This menu contains previously saved waveforms that can be loaded The ﬁrst line after these waveforms is the CURRENT WAVEFORM which is the waveform of the l...

Страница 42: ... _ z x c v b n m SPACE Figure 5 2 Save Load Waveform Name 2 Use WX and ST to move through the characters to the desired letter or number 3 Press Insert Char or 6 to add highlighted characters to your waveform name 4 When ﬁnished press OK to return to the previous display which shows the new text on the highlighted line To delete a saved waveform use ST to highlight the waveform Press the Delete so...

Страница 43: ...gure 5 3 Save Load Preview To check that a waveform is the one you want to test or load use ST to highlight the waveform and then press the Preview softkey You cannot preview the current waveform Preview displays a waveform in limited measurement style display without manipulations available To return to the Save Load menu press Previous Menu www com information itm com 1 800 561 8187 ...

Страница 44: ... next to the power battery status indicator symbol in the top right hand corner of the screen Vp Pulse Vertical Position Save Load Setup Main Display Test Manual TDR Use Up Down to change Span Smoothing is 3 Go to Setup More Settings to change Vp 0 820 GAIN 52 dB PW 1 ns ERL 25 dB DIST 260 7 ft Marker On Marker Off 250 200 feet Span Figure 5 4 Transferring a File to the Trace Viewer Program on a C...

Страница 45: ...ed and cleaned after no more than 500 hours of use Inspection t Inspect the exterior of the TV220 for wear missing parts or cracks in the enclosure Replace any defective parts t Inspect connectors for cracked insulation broken shells deformed contacts or dirt in the connectors Clean or replace as necessary t Inspect test cables for bent or broken plugs clips or frayed cut insulation Replace as nec...

Страница 46: ...strated to the following speciﬁcations as listed in the Ofﬁcial Journal of the European Communities EN 61000 6 3 Emissions EN 55011 Radiated Class A EN 55011 Conducted Class A EN 61000 3 2 3 Current Harmonics and Voltage Fluctuations EN 61000 6 1 Immunity EN 61000 4 2 Electrostatic Discharge EN 61000 4 3 Radiated Immunity EN 61000 4 4 Electrical Fast Transients EN 61000 4 5 Surge withstand EN 6100...

Страница 47: ...ft 3 ft uncertainty of Vp 1829 to 3657 m 1 2 m 6001 to 12 000 ft 4 ft uncertainty of Vp Display Resolution 0 17 ft minimum on 640 x 480 pixel high resolution LCD Display Ranges 8 ranges plus single key expand window Gain 0 to 90 dB in 3 dB steps Input Protection 400 VDC peak AC to maximum of 440 Hz 30 second duration Waveform Storage Up to 20 waveforms Battery Saver Power off 5 to 30 minutes or al...

Страница 48: ...able USB A male to B male 52034786 Coaxial jumper cable F type male to F type male 52034557 Adapter connector F type female to F type female 52034533 Adapter connector F type female to BNC male 52034620 F type to KS test adapter 52040329 Soft carrying case 52038462 Shoulder strap for carrying case 52040565 TV220 Instruction Manual 52040566 Quick Reference Card Optional Part Number Accessory 520593...

Страница 49: ...o the system divided by the energy delivered or in some cases lost by the system This instrument measures return loss The formula for decibels is dB 20 log Vi Vl where Vi is the voltage of the incident pulse Vl is the voltage reﬂected back by the load and log is the decimal based logarithmic function DC Direct Current a method of delivering electrical energy by maintaining a constant ﬂow of electr...

Страница 50: ...which appears on the display like very high impedance PW Pulse Width the horizontal size of the transmitted pulse usually measured in nanoseconds RL Return Loss measures the severity of an event RL does not account for cable loss in the measurement TDR Time Domain Reﬂectometer an instrument that sends out pulses of energy and times the interval to reﬂections also called cable radar If the velocity...

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