Manual - North American Cable Equipment
Contents
1. performance rechargeable battery The voltage of batter can be monitored automatically the meter shall alarm when power is low Press the voltage measurement key the instrument shall show the battery voltage The meter powers off automatically if there is no operation for set power off time Please use only the charger provided with the meter using any other battery charger may overheat or distort the meter or cause fire injury or harm to the environment and will void the warranty The indicator on the front panel will turn red when the instrument is being charged The charging can be done when both the meter is power on and power off CT DLM870D TV SIGNAL LEVEL METER Quick Start Guide Make certain that the battery is fully charged Turn the unit ON by pressing Lo The unit will buzz and enter the main menu after displaying the logo and model number Using arrow keys highlight the SETUP menu and press key or directly press on keypad the meter will enter SETUP menu and display setting items Using arrow keys highlight SHUTDOWN TIME and press e select a SHUTDOWN TIME mode of your choice and then press to confirm Next to SHUTDOWN TIME select the LEVEL UNIT option The display shows three available units of measure dBuV dBmV and dBm It is common in the industry to refer to RF signal strength as dB In reality the unit of measure is dBuV or dBmV varying from differe2. CT DLMS870D TV SIGNAL LEVEL METER USER MANUAL 1 Overview 1 1 RF input 2 Speaker 3 LCD display a 4 Charger indicator 5 RS232 communication port 6 3 6 DC IN port A The battery icon shows the remaining power of battery The current channel plan The current test mode D The current channel number and video carrier frequency E The signal strength F Signal level bar G Soft keys of function menu corresponding ODAO 4 5 6 ED E E Functional keys corresponding to functions indicated on the bottom of the screen to Numeric keys used for input of number or short cut to test mode in the main menu In test mode is used for saving test result as a file is used to enter file management menu from the main menu Arrow keys is also used as backspace key when inputing a number amp is used as a dot when inputing a number e Channel input key and enter key Fr T Frequency input key and escape key Main menu key Power key 2 Power on and setup Power On To turn meter on press Lo the meter will buzz and enter the main menu Menu instruction Press poe the meter will display the main menu The main menu includes below items in according with the number in the icon Co 1 Level measurement 2 Auto measurement 3 Spectrum analysis 4 Scan 5 Tilt 6 Voltage 7 C N 8 Setup You can directly enter each measurement using short cut of the
3. Hz 49 0u press to enter single channel measurement mode First set the current channel type Press C3 to display channel setup window If the channel type is digital channel it will display 1 Channel NO 2 Type 3 Frequency 4 Bandwidth 5 Mode 6 Symbol rate 7 Save settings If the channel type is analog channel it will display Channel NO Type Frequency Bandwidth Audio IF Save settings HOU E YN E Using arrow key highlight an item and press Fa to enter using EN arrow key to toggle options or directly enter parameter using keypad and press or key to confirm In the single digital channel measurement mode the channel number is shown CHD instead of CHV that the analog channel number is shown In the middle of the screen it displays the digital average power Soft key function definition Enter the spectrum analysis of current channel QAM enter QAM analysis mode Channel setup Change the Channel under Test 1 Press O amp keys to change the channel number in the sequence of channel plan et 3 2 Using the keypad directly input the desired channel to be measured and press Press Fi to enter spectrum analysis of current channel fm LSA STD mode for detailed operation please refer to 3 3 spectrum CHOLLI Sie Arohi measurement 215 06 MHz MODE 6404 Press to enter the QAM measurement as shown in Figure Enter the symbol rate using key
4. engths of 8 channels display in the screen synchronously Using toggle the DIV among 1dB 2dB 5dB 10dB 20dB Press O to view the testing results in list E 2 ED 106 258 18 A 230 instead of graphic bar Press again or press to Mara aiian 25 0 quit to previous menu In TILT mode press EN to enter the setup menu You can set up to 8 channels for TILT test here Using cy highlight the desired channel and press La J to select Press Fa to confirm after selection Press E to view the channel list and press ED to quit to previous menu The max signal strength min signal strength and their difference display on the screen 3 6 Trunk Voltage Measurement In the main menu select the VOLTAGE item press EA the fm 1Sa STD meter will enter the voltage measurement mode As shown in e UTGAC 52 00 below figure The meter will automatically identify AC or DC of the trunk voltage and display on the screen The battery voltage also BAT TER 9 0 display on the bottom Typically at the cable demarcation point outside the structure there will be no trunk voltage 3 7 Carrier to Noise Ratio Measurement fm USA STE In the main menu select the C N item and press FA to LHE 377 dante enter the signal noise ratio measurement mode Please Watton Note The function affects when the signal input level is greater than 60 dBuV 4 Power supply Power Supply The meter is equipped with a high
5. er due to the complexity of the actual signal the user may also need to re edit it Users can edit the user channel plan in the menu of EDIT PLAN Restore fm L1S5A STD If you want to set the unit to factory default select RESTORE er CREATE PL Ale and press E or e to confirm Software version In the SETUP menu select the SOFTWARE VER The SOFTWARE WER En i Iu software version will be displayed like below figure Hardware version In the SETUP menu select the HARDWARE VER The As HARDWARE VER hardware version will be displayed like below figure 11 SERIAL NUMBER Serial number In the SETUP menu select SERIAL NUMBER The serial number will be displayed like below figure 3 Start to Use Save and manage files fm USA STD CHEL19 313 44 MHz In any test modes you can save test result as a file and review a Input Filename in future Press O there will be a pop up Input Filename input the file name here and press L to confirm The file will be saved Press moa to cancel and quit the pop up To manage the saved file press 9 in main menu and you will enter file management mode Using arrow button highlight the file and press ED to select one or more files press to delete the selected files press E to review the highlighted file Single Digital Channel Measurement In main menu select LEVEL icon and press or directly f USH SIL CHE113 419 48 M
6. ms using arrow keys select Save settings and press and select YES in the pop up then press to confirm Edit Plan The user can edit the channel plan items INCLUDING Channel number availability channel type video carrier frequency bandwidth and sound carrier frequency when the channel type is set to digital it can also be the digital channel center frequency bandwidth modulation mode and the symbol rate Channel Type digital signal analog signal Channel bandwidth 1MHz 9 9MHz Modulation 16 32 64 128 256QAM Symbol rate 1M 7M Create Plan The following steps can create a user channel table 1 Connecting cable 2 In the SETUP menu select CREAT PLAN and press to enter 3 The unit will show below content Using the F2 to select the channel plan of your TV system cH and then press the O or key to start The progress bar shows the degree of created m LUSH STD USA STO pct META Please press F oct F e lLonnect TU system Choice channel template Please press Fito start 0 dBm al F e When finished using arrow keys select YES to preserve and select NO to escape then press to confirm Note The unit needs to access a cable television system The unit will automatically select the channels with signal strength greater than 20dBmV 40dBuV or 67dBm and collect them into the user channel plan recognizing analog or digital channel Howev
7. nt countries Using the arrow keys select the desired unit and press the key to confirm Next in the LANGUAGE item select the desired language In the next item CHANNEL PLAN select the desired channel plan Next item is CONFIG PLAN Here you can set the default settings of all channels Next item is EDIT PLAN Here you can set the parameters of each single channel Next item is CREATE PLAN Here you can automatically enable all channels of selected channel plan those are higher than 20dBmV 40dBuV or 67dBm and disable others Press 3 to enter the menu connect the meter to CATV system using E select the channel plan of your TV system and then press E or EA to start The progress bar shows the degree of created when finished using arrow keys select YES to preserve and select NO to escape then press O to confirm Press the ED or tar to return to the main menu Using the arrow keys to select LEVEL and press 8 or directly press numeric key you will enter the signal level test mode The display will show the channel number video frequency and video carrier signal strength Using a supplied F coupler connect the CATV signal lead to the input located at the top of the instrument The unit should immediately display the video carrier signal strength of current channel Press the arrow keys to move to the next or previous channel Direct channels may be entered by pressing a
8. nt mode cH Using keypad input center frequency and press e or input EA cH channel number and press the unit will enter single channel spectrum analysis mode and the center frequency is the channel center frequency and the bandwidth turns to 9MHz Using toggle the cursor of center frequency then using tune the frequency Press E then using D adjust the reference level Press D key to move the marker Press O to enter next page of soft keys Press ED to toggle the DIV setting of the testing graphic among 1dB 2dB 5dB 10dB 200B Press O to toggle the bandwidth of spectrum analysis in steps of 4 5MHz 9MHz 27MHz 54MHz All 3 4 Scan In the main menu press the SO amp key until the unit shows SCAN in the bottom of screen press S the meter enters SCAN measurement mode Press D and using D adjust the reference level by step of 5dB Press O to toggle the DIV setting among 1dB 2dB 5dB 10dB 20dB Press the SO SO arrow keys you can move the marker the channel bar that the marker located will show on the screen as well as signal strength Press ED to zoom in or zoom out You can move the marker to view the channels out of the screen The number to display at a time depends on the screen It is about 100 channels when zooming out to the maximum 3 5 Tilt Measurement CHI seu In the main menu select the TILT measurements press to enter Signal str
9. number in the icon Setup the meter Set the meter before using instrument all settings will be stored in the memory devices In Menu mode press the ARROW buttons to select SETUP and press the screen will display items as shown in Figure 2 01 SHUTDOWN TIME 02 LEVEL UNIT 03 LANGUAGE 04 CHANNEL PLAN 05 CONFIG PLAN 06 EDIT PLAN 07 CREATE PLAN 08 RESTORE 09 SOFTWARE VER 10 HARDWARE VER 11 SERIAL NUMBER cH Using arrow keys or O select the desired item and then press or O to enter cH using arrow keys or toggle the option then press or Fa to confirm the setup Shutdown time In order to save energy this meter can be set to automatically shut down when there is no operation ae SHUT LEVE Automatic shutdown time options 10minutes 20minutes 30minutes Always on Level unit USA STD Bt SHUTDOWN TINE q BA LEVEL UNIT dBuV AB dnl dBm Lt META The current unit of measurement shows in the bottom of the screen and you can toggle among below units Language m5 115A STD H Chinese 62 LEVEL UNIT i Pnois 48 LANGUAGE English Channel Plan O A Using arrow keys select the item and press to enter the setup press to select the desired channel plan and then press the again to save Configure plan In this setup menu you can set the default settings of all channels 1 Bandwidth2 Audio IF 3 Digi mode 4 Mode 5 Symbol rate 6 Save settings After setting all ite
10. pad and press ED again to confirm and highlight next parameter MODE modulation type Using D arrow key toggle the modulation type until it shows the correct option and press again to confirm Press O to fresh the measurement Press C3 or FA to enter constellation analysis To zoom in the display using arrow keys to highlight the quadrant you want to zoom in and press O o E Single Analog Channel Measurement In the single analog channel measurement mode Soft keys definition Er PRE to H ED Enter spectrum analysis of current channel Enter A V measurement mode Channel NO Type Frequency Bandwidth Audio IF Save settings Press ED to enter the spectrum analysis of current channel For details please refer to 3 3 spectrum measurement Press to set the type of analog channel or digital channel Press E to enter A V measurement mode simultaneously CHUI display the channel audio and video carrier frequencies and signal strength as well as the relative difference between the two Single Frequency Measurement Mode In channel measurement modes using keypad manually input any desired frequency and press Ifan audio carrier exists on this frequency it will be heard through the speaker As this unit is equipped with an FM demodulator this will measure signal strength of any transmitted FM signal and play the audio m USA SID L CH BH 20 MHz In frequency measurement mode p
11. ppropriate number keys then pressing Direct single frequencies may be entered by pressing MHz button followed by the appropriate number keys To select a direct frequency press until the cursor highlights a value and use the gt Dd to change the value To test the digital channel using the arrow keys move to a digital channel and press E to show channel setting window Using the arrow keys highlight TYPE and press E Using arrow keys change the type to Digital and show options of digital channel Enter correct parameters and press e Or you can directly quit by pressing ED the settings will be saved automatically The channel number will become CHD instead of CHV The channel power will show on the screen Press E the display enter QAM analysis menu and show the results of MER BER as well as the graphics of constellations after pressing The instrument will now display the video carrier strength of the selected channel on the display It is this carrier signal that is critical Typical cable company requires this signal be within 5dB of 0 at the demarcation point outside the structure as well as all cable outlets within Note that signal strength of considerably lower than 55dBuV 5dBmV may still provide satisfactory reception depending upon the quality and size of the connected television receiver
12. ress 22 continuously the cursor blinks indicating the step of 100MHz 10MHz 1MHz 100KHz 10KHz you can increase or decrease the frequency 39 O dEn DE by pressing S keys in the step where the cursor is En located Channel Audio Carrier Signal Strength In the single analog channel measurement mode press 8 to shift the unit between video carrier frequency mode shows CHV in the channel number and Audio carrier Frequency mode shows CHA in the channel number Er PRE to H The unit will display the audio carrier frequency the signal strength and play the audio m CHIHA CATI Es 3 2 Auto test mode O ogi 20 4 47 9 25 8 In the main menu press gt SO keys until the unit 14 iG 26 1022 if 25 0 12 A 28 2147 A 25 8 1134 250 22 A 25 8 gt H H cH shows AUTO in the bottom of screen press e the meter enters auto test mode Press O to enter setup of auto test channels you can select up to 8 channels for auto test Using keys cH highlight the desired channel and press or E to Mo q q12 113 select Press to get back to auto test menu press mo fee Air Bee I E i z ED and the selected channels will be tested and the signal level of analog channel or power of digital channel will be shown in the list 3 3 Spectrum measurement In the main menu press the SO keys until the unit Shows SPECT in the bottom of screen press the meter enters spectrum measureme
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