CableTronix CT-DLM870D User Manual Download Page 11

Press 

  to toggle the DIV setting among 1dB, 2dB, 5dB, 10dB, 20dB. 

 

Press the 

 

  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 

  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 
 
In the main menu, select the TILT measurements, press 

 to enter. 

Signal strengths of 8 channels display in the screen 

synchronously. Using 

  toggle the DIV among 1dB, 2dB, 

5dB, 10dB, 20dB. Press 

  to view the testing results in list 

instead of graphic bar. Press 

 again or press 

 to 

quit to previous menu. 
 

In TILT mode, press 

  to enter the setup menu. You can 

set up to 8 channels for TILT test here. Using 

 

 

highlight the desired channel and press 

  to select. Press 

 to confirm after selection. Press 

 to view the 

channel list and press 

  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 

, the 

meter will enter the voltage measurement mode. As shown in 

below figure. 
 
The meter will automatically identify “AC” or “DC” of the trunk 
voltage, and display on the screen. The battery voltage also 
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 

In the main menu, select the “C/N” item and press 

 to 

enter the signal noise ratio measurement mode. 

Summary of Contents for CT-DLM870D

Page 1: ...CT DLM870D TV SIGNAL LEVEL METER USER MANUAL...

Page 2: ...n menu Arrow keys is also used as backspace key when inputing a number is used as a dot when inputing a number 1 RF input 2 Speaker 3 LCD display 4 Charger indicator 5 RS232 communication port 6 DC IN...

Page 3: ...easurement 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 number in the icon Setup the meter Set the meter...

Page 4: ...automatically shut down when there is no operation Automatic shutdown time options 10minutes 20minutes 30minutes Always on Level unit The current unit of measurement shows in the bottom of the screen...

Page 5: ...ndwidth 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 signa...

Page 6: ...ty 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 If you want to set the unit to factory default select RESTORE and pre...

Page 7: ...eview the highlighted file Single Digital Channel Measurement In main menu select LEVEL icon and press or directly press to enter single channel measurement mode First set the current channel type Pre...

Page 8: ...measured and press Press to enter spectrum analysis of current channel mode for detailed operation please refer to 3 3 spectrum measurement Press to enter the QAM measurement as shown in Figure Enter...

Page 9: ...rrier 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 In...

Page 10: ...ad input center frequency and press or input channel number and press the unit will enter single channel spectrum analysis mode and the center frequency is the channel center frequency and the bandwid...

Page 11: ...s to quit to previous menu In TILT mode press to enter the setup menu You can set up to 8 channels for TILT test here Using highlight the desired channel and press to select Press to confirm after sel...

Page 12: ...urement 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 a...

Page 13: ...CT DLM870D TV SIGNAL LEVEL METER Quick Start Guide...

Page 14: ...ge 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 o...

Page 15: ...tal and show options of digital channel Enter correct parameters and press Or you can directly quit by pressing the settings will be saved automatically The channel number will become CHD instead of C...

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