4.2.3 M easurements on analogue channels
4.2.3.1 C arrier level measurement (analogue channels)
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Select the analogue channels measuring mode as it is explained in point 4.2.2.
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Select the desired tuning mode and tune the signal to be measured in the
manner explained in point 4.2.1.
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Wait until the measured value is stabilized. Read the value shown on the
display. The units will be given in dBµ V (dBmV using the option OPT-006-61,
or by means of the customization program RM-006).
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The direct read range of the instrument is from 25 to 120 dBµ V, and within this
range the measurement is completely automatic. The microprocessor calculates
the attenuation value corresponding to the proper measurement range. When
the signal level being measured is lower/equal than the sensitivity or
higher/equal than the saturation level of the instrument, the symbols "<" or ">"
will appear, respectively.
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When the tuning is carried out by channels, it is possible that the broadcasting
station deviates a few kHz with respect to the channel frequency. If this
variation is higher than 40 kHz, tune again using this time the frequency mode,
to obtain a more correct level reading.
E xample 3.
Measuring the video carrier level in channel 21 (CCIR standard).
C21
