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TV & SAT Level Meter MTD 120
User Manual
4.10.1.6.- Reference Noise
(Only in C/N measurements). Permits to define the frequency where noise level will be measured.
To modify the frequency where you want to measure noise level, accede to the menu functions and select the Reference noise function
then, again in the Spectrum mode, press keys
[6] to place the marker on the frequency where you want to measure the noise level or
well, press key SHIFT [31], current reference noise frequency will be erased and using the keyboard introduce the new value. Finally accede
to the functions menu again and execute the Carrier function so that you can tune new carrier frequencies by pressing keys
[6] .
4.10.1.7.- Channel Bandwidth
(Only in Channel Power measurements). Permits to define channel bandwidth.
To modify the channel bandwidth, that is to say the power integration limits, accede to the menu functions and select the Channel
bandwidth function then, again in the Spectrum mode, press keys
[6] to modify it or well press key SHIFT [31], current channel
bandwidth will be erased and using the keyboard introduce the new value. Finally accede to the functions menu again and execute the
Marker function so that you can tune new carrier frequencies by pressing keys
[6] .
4.10.1.8.- Marker
(Only when measuring Channel power and after defining the Channel bandwidth). Permits to change the tuning frequency by means of
keys
[6].
4.10.1.9.- Carrier
(Only when measuring C/N Referenced and after defining the Reference noise). Permits to change the tuning frequency by means of
keys
[6].
4.10.1.10.- Bandwidth of the Spectrum Measuring Filter (Measure bandwidth)
The frequency resolution of the Spectrum Analyser mode is determined by the bandwidth of the measuring filter when displaying the
spectrum. This parameter is fundamental given the increasing density of channels present in all TV transmission systems.
To alter the bandwidth of measurement select the Spectrum Analyser functions menu, then press keys
[6] to select the Measure
bandwidth function and press key ENTER [5]. The screen will show a window displaying the values which can be selected. Pressing keys
[6] to select the chosen bandwidth and activate it by pressing key ENTER [5] again.
The choice of bandwidth is:
Terrestrial channels:
230 kHz or 1 MHz
Satellite channels:
230 kHz or 4 MHz
Filters with the greatest bandwidth (4 MHz y 1 MHz) allow you to take more stable measurements, as well as being able to distinguish
between analogue and digital carriers. The 4 MHz filter is ideal for level measurements on the satellite band. The 230 kHz filter is
recommended for measuring terrestrial television, cable television and MMDS signals. It also allows you to identify smaller bandwidth signals
such as NICAM sound carriers (terrestrial analogue channels), to detect the beacon signal on VSAT, the separation between the audio FM
carrier, and between the stereo sub-carriers in television.
4.10.1.11.- Selecting the Channels Table (Channel set)
See 4.9.2.7 section.
4.10.1.12.- Batteries and External Units Power Supply (Battery & Lnb)
See 4.9.2.3 section.
4.10.1.13.- Exit
Exits from the Spectrum Analyser function menu.
