Promax PROLINK-4 Manual De Instrucciones página 198

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 the rotary selector.
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 turn the rotary selector [4] to the Measure bandwidth function and press. The
screen will show a window displaying the values which can be selected. Turn the rotary
selector [4] to the chosen bandwidth and activate it by pressing the selector again.
The choice of bandwidth is:
Terrestrial channels:
Satellite channels:
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 4.9.4.7 section.
4.10.1.12 Batteries and External Units Power Supply (Battery & Lnb)
See 4.9.4.3 section.
4.10.1.13 Exit
Exits from the Spectrum Analyser function menu.
Page 80
230 kHz or 1 MHz
230 kHz or 4 MHz
USER'S MANUAL. PROLINK-4
02/2003