SCS PTC-IIex, Руководство пользователя

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8 FAX
Sets the internal amplification factor for AM-FAX reception. The brilliance of the
received picture can thus be set, without having to change the receiver volume. Some
receivers offer an AF-output with a virtually constant amplitude. In this case,
AGain
offers almost the only possibility to adjust the brilliance of the received picture. With the
AGain
default value of 50 an input signal of 500 mV causes the maximum output value
of 255 at the RS-232 interface. The
AGain
-parameter is a linear amplification factor.
8.9.2 AResolut
Default setting: 2
Parameter: 0 1680 Pixel/sec.
1 2500 Pixel/sec.
2 3400 Pixel/sec.
Gives the maximum possible time resolution of the received signal in AM-FAX. Also the
AResolut
parameter adjusts the bandwidth of the input bandpass-filter appropriately.
With noisy signals, it is recommended that the
AResolut
parameter is set to 0, as the
effective signal to noise ratio is thereby increased. The maximum resolution is as follows:
0=1680 pixels/sec., 1=2500 pixels/sec, 2=3400 pixels/sec.
8.9.3 FResolut
Default setting: 2
Parameter: 0 1000 Pixel/sec.
1 1500 Pixel/sec.
2 2000 Pixel/sec.
3 2800 Pixel/sec.
Gives the maximum possible time resolution of the received signal in FM-FAX. Also the
FResolut
parameter adjusts the bandwidth of the input bandpass-filter appropriately.
With noisy signals, it is recommended that the
FResolut
parameter is set to 0, as the
effective signal to noise ratio is thereby increased. The maximum resolution is as follows:
0=1000 pixels/sec., 1=1500 pixels/sec, 2=2000 pixels/sec, 3=2800 pixels/sec.
8.9.4 SResolut
Default setting: 2
Parameter: 0 1000 Pixel/sec.
1 1500 Pixel/sec.
2 2000 Pixel/sec.
3 2800 Pixel/sec.
Gives the maximum possible time resolution of the received signal in SSTV. Also the
SResolut
parameter adjusts the bandwidth of the input bandpass-filter appropriately.
With noisy signals, it is recommended that the
SResolut
parameter is set to 0, as the
effective signal to noise ratio is thereby increased. The maximum resolution is as follows:
0=1000 pixels/sec., 1=1500 pixels/sec, 2=2000 pixels/sec, 3=2800 pixels/sec.
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