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ENGLISH
TV & SAT Level Meter MTD 120
User Manual
4.9.2.4.2.- Selecting the Measurements to be Taken
Once the Data logger function has been configured, activate the measurement configuration(s) (columns) which you would like to use.
The headings of the measurement matrix columns of the Data logger function coincide with the number of memorised measurement
configurations, simply place the cursor over each column and you will see the more important parameters displayed at the bottom of the
screen (name assigned to the memory position, frequency/channel, measurement mode and units of measurement).
To activate the measurement configurations repeatedly press key SHIFT [31] until the cursor is placed on the columns field, next
pressing keys
[6] until it is positioned in the column (memory) that you wish to activate and press key ENTER [5]. The activated
columns are more brilliant than the non activated ones. To deactivate a column follow the same steps as in activating it.
To activate rows where you wish to store measurements use key SHIFT [31] to place the cursor on the rows field, then press keys
[6] until it is over the row you want to activate and press key ENTER [5]. The activated rows are more brilliant than the non activated
ones. To deactivate a row follow the same steps as in activating it. In the case of activating more than one row, the time interval between the
measurement of each row is determined by the Measure interval parameter defined in the configuration screen (1 minute by default).
4.9.2.4.3.- Taking Measurements
In addition to execution by alarm (see section '4.9.2.4.1 Configuring the Data Logger Function') there are three more ways to take
measurements:
a) Acquisition over a time period.
The measurement defined in a memory (column) will be taken as many times as there are activated rows, as specified by the time
interval between measurements defined in the configuration menu (Measure interval).
Process: place the cursor on the column you want and press key ENTER [5] until the first active cell blinks. If no measurement matrix
row has been previously activated, the bottom of the screen will show the error message "NOT CELLS SEL." (No cells selected).
b) Acquisition of different measurements at the same moment.
Multiple measurements in a row will be taken, as specified by the measurement configurations defined in all the activated columns.
Process: place the cursor on the row you want and press key ENTER [5] until the active cells blink. If no measurement matrix column
has been previously activated, the bottom of the screen will show the error message "NOT CELLS SEL.".
c) Multiple acquisitions.
All the measurements defined by all the activated rows and columns will be taken, in the case where more than one row has been
activated the time interval between measurements will be that defined in the Measure interval field of the configuration menu.
Process: select the Run function and press key ENTER [5]. If no measurement matrix element has been previously activated, the
bottom of the screen will show the message "NOT CELLS SEL.".
If any key is pressed during the acquisition process, the acquisition process will abort and the screen will display the message "DL
STOPPED" (Data Logger deactivated).
4.9.2.4.4.- Exiting the Data Logger Function
To exit the Data logger function select the Exit field using key SHIFT [31] then press key ENTER [5].
4.9.2.4.5.- Examples of Data Logger Function Applications
The Data logger function has many applications such as channel equalisation and measuring signal attenuation at each pickup.
Band Equalisation (frequency acquisition)
For this application you will need to use a noise generator as the signal source in the place of a receiver antenna. If, lets say, you wish to
verify equalisation on the VHF band, then:
1. Define the following tuning frequencies at 8 memory positions: from 50 to 450 MHz in 50 MHz steps. The measurement to be taken will
be the level measurement.
2. In the Data logger function, activate the columns related to the memories defined in the previous step.
3. Next place the cursor on the row where you want to store the measurements and press key ENTER [5] until the first of the cells blinks.
The measurements obtained will allow you to verify if the signal level is uniform across the entire band.
