Analogue Tv: Measuring The Video / Audio Ratio (V/A); Analogue Tv: Measuring The Fm Deviation - Promax TV Explorer HD Manual De Usuario

USER'S MANUAL. TV EXPLORER HD / HD
So, if there are ten carriers with a level around 90 dBµV, their equivalent level will be:
90 dBµV + 10 log 10 = 100 dBµV
Observe that in this case, loss of tuning by overload of the RF input may occur besides
other effects such as tuner saturation and generation of intermodulation products that
may mask the spectrum visualization.

5.14.2 Analogue TV: Measuring the Video / Audio ratio (V/A)

In the Audio/Video measurement mode, on the screen appears the following
information:
In addition to the video carrier / audio carrier level ratio (16.2 dB in previous figure)
it also shows the frequency or channel, depending on the tuning mode selected, and the
Carrier/Noise ratio.

5.14.3 Analogue TV: Measuring the FM deviation

The TV EXPLORER
modulated analogue carrier in FM. This function allows visualising frequency peak
deviation for FM carrier signals.
Once this DESV FM measurement mode is activated will appear the following
information on screen:
05/2011
LE
Figure 23.- Measurement of the video/audio ratio.
HD / HD measure the deviation in frequency of any
LE
Page 49