Link-11 (Clew) - Wavecom W74PC Manual

Designation Frequency (Hz)
RED "H" 645.7

LINK-11 (CLEW)

Link-11 (CLEW: Conventional Link Eleven Waveform), also known as TADIL-A, is a transmission mode
mostly in HF band, to run a tactical digital information network. This mode is specified by the US Depart-
ment of Defense (DoD) in MIL-STD-188-203-1A (8
Parameter
Frequency range
Operation modes
Symbol rate
Modulation
Receiver settings
Shift/Bandwidth
Center
Receiver settings
Input format(s)
This mode has 16 carriers: one Doppler tone at 605 Hz; 14 data carriers starting at 935 Hz with tone dis-
tance of 110 Hz and the 16
cept the Doppler tone, other carriers are DQPSK, modulated at the symbol rate of 75 or 45.45 Baud.
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
There are 5 frame formats:
 DNCS IM: Data Net Control Station Interrogation Message
WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V9.1.0
Designation
RED "S"
th
Value
HF
Multi-carrier, DQPSK
75 Bd or 45.45 Bd
16-tone, DQPSK
USB
2310 Hz
1650 Hz
DATA, CW, LSB or USB
AF, IF
th
carrier at 2915 Hz is used for data and synchronization, see table below. Ex-
Frequency (Hz)
605
935
1045
1155
1265
1375
1485
1595
1705
1815
1925
2035
2145
2255
2365
2915
January 1988).
Description
Doppler
Data
Data
Data
Data
Data
Data
Data
Data
Data
Data
Data
Data
Data
Data
Data / Sync
Frequency (Hz)
1479.1
Bit location
-
0 and 1
2 and 3
4 and 5
6 and 7
8 and 9
10 and 11
12 and 13
14 and 15
16 and 17
18 and 19
20 and 21
22 and 23
24 and 25
26 and 27
28 and 29
Transmission Modes  183