Promax PROMAX-4, Руководство пользователя

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USER’S MANUAL. PROMAX-4
Novembre 1999 Page 13
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[15] Measurement of the video-to-audio ratio. Press this key to measure the video-to-
audio ratio of the signal, once the video carrier level is stabilized.
[16] Tuning mode: frequency, channel, program. Press this key to select among tuning
by frequency, channel or program.
4.2 Operation instructions
4.2.1 Tuning mode selection
The PROMAX-4 has theree different tuning modes:
By frequences: From 45 to 862 MHz in steps of 62.5 kHz, using the rotary switch.
The values displayed are given in MHz, with a two-decimal
resolution.
By channels: The channel plan in the CCIR standard or may be established under
request (OPT-004-61), or be configured by the user (RM-004), with a
maximum of 239 channels.
By programs: The program plan may be configured either from the instrument itself
or by using the customized configuration software (RM-004), with a
maximum of 64 programs.
To select one of the three tuning modes, press the F-C-P key [16]. Turn the
rotary switch to select among the program, channel or frequency modes. When the
desired tuning mode is displayed, press the F-C-P key [16] again.
Example 1: Changing from channel mode to frequency mode.
This procedure can be useful in discovering the real frequency in MHz of the
selected channel. The example illustrates finding the frequency which corresponds to
channel 44.
+ FREQ +
Example 2: To change the frequency value from 62.25 MHz up to 850 MHz.
Due to the high resolution of the instrument (62.5 kHz) it is not very efficient to
move through all the bands in frequency mode. A satisfactory solution is to use the
channel mode to make substantial changes in frequency, as is shown in the example
below.