Wavecom W61PC V7.5.0 - Manual (Page 232)

222  Transmission Modes WAVECOM Decoder W61PC/LAN Manual V7.5
Mode Type Time [s] Resolution [Pixel x Line] Notes
SC-2 30 RGB 30 256 x 128
SC-2 60 RGB 60 256 x 256
SC-2 120 RGB 120 512 x 256
SC-2 180 RGB 180 512 x 256
Notes:
* Not implemented
a Top 16 lines gray scale
b Top 8 lines gray scale
c Similar to original SSTV
d No horizontal sync (start of a new line)
STANAG-4285
STANAG-4285 is specified by the NATO (North Atlantic Treaty Organization) Military Agency for Standardi-
zation in "Characteristics of 1200 / 2400 / 3600 Bits per Second Single Tone Modulators / Demodulators
for HF Radio Links" (16. February 1989).
Parameter Value
Frequency range HF
Operation modes Broadcast/Simplex FEC
Modulation 8-PSK
Center frequency 1800 Hz
Symbol rate 2400 Bd
Receiver settings DATA, CW, LSB or USB
Input format(s) AF, IF
The modulation technique used in this mode consists of phase shift keying (8-PSK) of a single tone sub-
carrier of 1800 Hz. The modulation speed (symbol rate) is always 2400 Bd.
Using different M-PSK modulations and FEC (Forward Error Correction) coding rates, serial binary user in-
formation (raw data) accepted at the line side input can be transmitted at different user data rates.
STANAG 4285 single tone waveform has the following characteristics which may be selected from Options
|Frame Format...:
Baud
Rate User da-
ta
rate
(bps)
User data
rate (bps) FEC coding
rate Interleaver No. of unknown
8-phase
sym-
bols (User Data)
No. of known 8-
phase symbols
(Channel Probe)
2400 2400 3 (8-PSK) 2 / 3 SHORT or LONG 32 16
2400 1200 2 (QPSK) 1 / 2 SHORT or LONG 32 16
2400 600 1 (BPSK) 1 / 2 SHORT or LONG 32 16
2400 300 1 (BPSK) 1 / 4 SHORT or LONG 32 16
2400 150 1 (BPSK) 1 / 8 SHORT or LONG 32 16
2400 75 1 (BPSK) 1 / 16 SHORT or LONG 32 16
2400 3600 3 (8-PSK) No coding ZERO 32 16
2400 2400 2 (QPSK) No coding ZERO 32 16