USER’S MANUAL. PROMAX-10
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Figure 23.- Level signal measurement.
Figure 22.- Configuration of digital
signal measurement.
The parameters which may be
changed and their margins are shown in the
following table. To change a given
parameter turn the rotary selector [9] until the field is
activated (it will appear shadowed) and then press.
The value of the parameter will be activated and may
be changed by turning the rotary selector. When the
value you want appears, press the rotary selector
[9] to validate it.
DESCRIPTION
PARAMETERS
VALUES
System (according to country)
ANNEX ITU-T
DVB, B, C
QAM Modulation
MODULATION
16, 32, 64, 128, 256
Symbol Rate
SYMBOL RATE
1.000 to 7.200
(*)
Attenuation
ATTN.
Auto or from 0 to 60 dB.
(Steps of 10 in 10)
Channel frequency Offset
∆
FCH
From - 2.00 to 2.00 MHz
(*) Remark: Including the OP-010-E option, otherwise the margin is from 1000 to 7000.
IMPORTANT
To leave the configuration menu, just press the key of the operating mode you
wish to access.
4.2.3.2
Frequency tuning and configuration
When in CHANNEL-FREQUENCY
operating mode, pressing again the CH-FR
[10] key switches tuning by channel to
tuning by frequency and vice versa. In the tuning
by frequency mode the instrument becomes a
receiver with a resolution of 10 kHz in the 5 to 862
MHz band. In this mode you may tune to any
signal within the band, including leakage pilots,
telephone and communications signals. To change tuning simply press the rotary
selector [9] until the digit you want to change is underlined and then turn the rotary
selector [9]. The channel number will appear to the left of the tuning frequency, as long
as it corresponds to an active channel.
a) Measurement functions
When the PROMAX-10
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works in frequency tuning, it allows to
measure the signal level being represented on a graphical bar. Simultaneously, this is
indicated by the loudspeaker which emits a tone that varies with the measured level.
The access to the measurement functions from the CHANNEL-FREQUENCY
operation mode when the instrument operates in channel tuning or frequency tuning
for the analogue or digital channels, is described in the following figure.
