What is Slow
Scan TeleVision ??
Let's keep it simple ... SSTV is a transmission mode used only by RADIO
AMATEURS. This mode gives the possibillity to transmit full color pictures
over the radio. The colors of the picture are transformed to an audio signal.
Each color has his own tone between 1500Hz (BLACK) and 2300Hz (WHITE). A
SSTV picture has 256 lines, each one transmitted 3 times (the 3 RGB colors).
The time to send over a picture is about 2 minutes.
Where do I find SSTV on the bands ??
How do I make a SSTV QSO ??
A SSTV QSO is made in the same way as a PHONE QSO, the only difference is
you transmit in between your phone QSO some pictures. It's important to
use your mike between pictures to avoid doubles. Never break in with a picture,
always contact the station in phone!
What mode shall I use ??
European stations take MARTIN1 as the standard mode. USA and JAPAN mainly
use SCOTTIE1 as the standard. All other modes in your SSTV program are not
often used, only for short experiments !
What report shall I give ??
In the SSTV mode a report is given in the RSV form.
R = RADIO (from 1 to 5, 5 is the best)
S = SIGNAL STRENGTH (1 to 9)
V = VIDEO (from 1 to 5, 5 is the best)
So when a picture in good shape is received with signal strenght 9 a RSV
595 is given.
SOFTWARE AND INTERFACE
I use CROMAPIX software
and the soundcard of my PC as interface.
I also use PHOTOIMPACT software
for images.
Here are some images I use:
Here are some of sstv images I get on the HF bands:
