background image

The screen view of the channel parameter editing mode is shown in the figure 4.12:  

 

 

 

Figure 4.12 

 
The sets of channel parameters depend on the modulation type. 
For channels with analog modulation the following parameters are available for 

editing: 

1. 

Type

: analog. 

2.

 Channel number:

 channel number. 

3.

 Frequency:

 tuning frequency. 

4.

 Channel name:

 channel name. 

5.

 Audio carrier: 

frequency of the audio carrier. Can be selected from the 

following values: 

4.5/5.0/5.5/6.0/6.5 MHz

. If you select 

Off

 value, V/A 

parameter for the channel will not be measured. 

6.

 Noise frequency: 

frequency shift for C/N ratio measurement. The available 

range is from 

–8000

 up to 

+8000 kHz

 with 125 kHz step. The zero value is 

shown as 

Off

. In this case the C/N parameter for the channel will not be 

measured. 

 

For channels with digital modulation the following parameters are available for 

editing: 

1. 

Type

: digital. 

2.

 Channel number: 

channel number. 

3.

 Frequency:

 tuning frequency. 

4.

 Channel name:

 channel name. 

5.

 Bandwidth: 

channel frequency bandwidth. The available range is from 

5.00

 

up to 

8.00 MHz

 with 250 kHz step. 

6.

 Noise frequency: 

frequency shift for C/N ratio measurement. The available 

range is from 

–8000

 up to 

+8000 kHz

 with 125 kHz step. The zero value is 

shown as 

Off

. In this case the C/N parameter for the channel will not be 

measured. 

The initial values of the parameters are set during the automatic detection of the 

channel plan and can be manually edited by the user. 

To fine tune a parameter, select it by   and 

 

keys, and then scroll to the required 

values by 

 keys, or enter them using the keypad. 

Using 

F2

 and 

F3

 keys you can scroll through the channels without exiting the channel 

parameter editing mode.

 

4.4.2.3. Creating New Channel Plan  
To create a new channel plan in auto mode, supply the signal to the Meter input and 

press 

F2/Add

. Enter the plan name in the dialog and press 

ENTER

. After the Meter has 

completed scanning all the TV channels, it will switch to channel plan editing mode. After 
you have edited the channel parameters and exited this mode, save it into the memory. 
You can also edit the channel plan name, if necessary. 

 

18 

Содержание IT-081

Страница 1: ...I 081 TV LEVEL METER OPERATING MANUAL...

Страница 2: ...Revision 1 1 of April 4 2016 2...

Страница 3: ...can Measurement Mode 15 4 4 Data Logger Function 16 4 4 1 General Information 16 4 4 2 Channel Plans 17 4 4 3 Limit Plans 19 4 4 4 Channel Data Logger 20 4 4 5 Spectrum Data Logger 22 4 4 6 Memory Man...

Страница 4: ...Resolution 0 11 m IT 086 Optical Power Meter MC 086 module plugged in measuring at 50 dBm to 20 dBm range and wavelengths 1310 and 1550 nm IT 087 DVB C Signal Analyzer MC 087 module plugged in 45 to...

Страница 5: ...you start to operate the Meter WARNING Only trained service personnel aware of the hazards involved should perform repair on the Meter CAUTION Tuning the Meter and replacement of the components that...

Страница 6: ...tegory CAT II Rated operating conditions a ambient temperature from 10 to 40 b relative air humidity not greater than 90 at 25 temperature c atmospheric pressure 84 106 kPa 630 795 mm Hg 2 5 Package C...

Страница 7: ...0 1 dB Accuracy within 30 126 dB V level range 1 5 dB Accuracy at operating temperature 2 2 dB Measurement channel passband for 3 dB level 230 60 kHz Frequency indication 6 characters on LCD Channel...

Страница 8: ...level V A and C N ratios 2 7 2 Block Diagram The block diagram of IT 081 is shown in figure 2 3 Figure 2 3 After the Low Pass Filter LPF the input signal if necessary is reduced by the two Attenuators...

Страница 9: ...has a USB port and an external power source connector The Removable Module connector is located on the back panel The Removable Module has a 75 Ohm input F connector and the connector for connection...

Страница 10: ...able Module software version is other than the software installed the IT 081 will start the program installation process automatically once the Meter is switched on The loading process is indicated by...

Страница 11: ...nit dBuV Press MENU ENTER Then enter Ch plan mode Select the first row All channels using keys and press F4 Select Press MENU ENTER key again In the main menu select the tab with the icons of measurem...

Страница 12: ...channel plan name current time and the battery remaining indicator If the channel plan is not selected the line will show All channels title and in this case the channel modulation type is determined...

Страница 13: ...owing of the signal level value after averaging Off Averaging off x4 Averaging over last 4 measurement reports x8 Averaging over last 8 measurement reports 4 3 2 Level Measurement Mode In this mode th...

Страница 14: ...third one is the point 1 125 MHz shifted down from the first one The measured V A and C N ratio will be indicated on the screen While operating by channel plan the IT 081 offers the capability of sel...

Страница 15: ...t this sweep press AUX key to open the menu with additional set of functions and then press F2 Run key If additional trace showing option is turned on Min or Max values are selected for Hold level par...

Страница 16: ...ger The data logger memory is common for all the directories and is of a dynamic type The memory capacity allows to save up to 32 channel plans up to 8 limit plans up to 130 channel data logger pages...

Страница 17: ...t the channel plan Figure 4 10 Press F1 to open the pop up menu with the list of available commands 1 Edit Viewing and editing of the selected channel plan 2 Rename Editing of the channel plan name 3...

Страница 18: ...annel name 5 Bandwidth channel frequency bandwidth The available range is from 5 00 up to 8 00 MHz with 250 kHz step 6 Noise frequency frequency shift for C N ratio measurement The available range is...

Страница 19: ...it plan Also you can add a new limit plan by pressing F2 Add 4 4 3 2 Editing Limit Plan The screen view of the limit plan is shown in the figure 4 14 Figure 4 14 The table contains the TV channel para...

Страница 20: ...eof Channel Data Logger allows viewing the measurement results and errors in different parameters and uploading the data onto your PC for further processing and report preparation List of Channel Data...

Страница 21: ...ify the errors after the limit test open the table of the detailed channel data F1 key The test parameter table will appear on the screen figure 4 17 Figure 4 17 In this table you can see the paramete...

Страница 22: ...igure 4 19 The screens show the list of spectrum data logger pages For each page the following information is presented status page name date and time of updating and frequency scanning range Press F1...

Страница 23: ...ory can contain different types of files For IT 081 Meter these are channel plan list limit plan list channel data log and spectrum data log Different configurations of IT 08 may have other file types...

Страница 24: ...you to estimate the time remaining for the Meter to operate You should consider that with decrease of air temperature the battery capacity also decreases This should be taken into account when estima...

Страница 25: ...the status field If an error has been detected the indicator will be red and in this case the Meter should be sent to repair service to have the defects corrected 4 5 2 Setting Regional Parameters Re...

Страница 26: ...moment of the last pressing of any key Auto backlight off parameter is for setting of automatic decreasing of the LCD backlight brightness after the selected time interval from the moment of the last...

Страница 27: ...a CD for installation place the CD into the disk drive Press Install ViewIt08C when the disk menu appears If you received the software in some different way just run the Install ViewIt08C exe file c a...

Страница 28: ...mware build for IT 081 Analyzer dated February 28 2012 will have the following name it081_build_120228 bsk2 Also the file name may contain the reference of the firmware application to a certain device...

Страница 29: ...as been operating with the Module of another type or if the versions of the Removable Module applications are different The device will indicate the firmware loading process from the Removable Module...

Страница 30: ...ect the mains adapter If the Meter switches on then the battery voltage has to be tested by means of the self test function Section 4 5 1 2 Low voltage 6 V is evidence that a battery or a number of ba...

Страница 31: ...ordance with the regulations of operation detailed in this Manual The manufacturer will repair or replace without charge at its option any IT 081 TV Level Meter found defective in manufacture within t...

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