SRG-1150DN / SRG-1250DN / SN-100
2.8 Narrow Band Direct Printing telegraphy (NBDP)
o PROTOCOL
Referring to CCIR recommendation 625, 476- 4,
490491, 491- 3 and CCIR recommendation F130.
o Calling MODE
Individual and group calling with 5- digit and 9- digit
SELECT CALL number.
o Operating MODE
ARQ (Auto Repetition Request)
CFEC (Collective Forward Error Correction) :
more than one receiving station
SFEC (Selective Forward Error Correction) :
one receiving station
o Status Display
POWER ON, STAND- BY, CALLED, CALLING, FREE.
SIGNAL, ARQ, CFEC, SFEC, SEND, RECEIVER,
PHASING, REPHASING, REPEAT, ERR etc.
o Coding
7- bit code 4B/3Y constant ratio mark signal
(B:1785Hz, Y:1615Hz)
o Memory Capacity
16M
o System Parameter
OPERATOR DATA is written on Flash Disk with Programming
and Back- up
o Center Frequency
1700Hz
o Frequency
Shift Range
± 85Hz
o Modulation Speed
100 baud (ARQ, FEC mode)
o Modulation
Phase- continuous AFSK
o Frequency deviation Within 0.5Hz
o Demodulation Input 0dBm, 600ohm unbalanced/balanced
o Modulation Output
0dBm, 600ohm unbalanced/balanced
