Please call for pricing and
availability.
All price quotes and purchases should be directed to Belinda McDonald, Office
Manager
belinda@grove-ent.com,
or call (800) 438-8155, or fax (828) 837-2216.
| Parameter | Value |
| System | Half-duplex ARQ |
| Center frequency | In the range (−3000,+ 3000) Hz; automatic frequency control (AFC): +/−50 Hz |
| Speed | 62.5 Baud |
| Modulation | PSK2A, PSK4A, PSK8A, PSK16A, ASK2PSK8, ASK4PSK16, 2DPSK2A; 8 tones |
| Additional Info | ITA-5 |
CLOVER-2000 is an adaptive modulation system with ARQ that uses Reed-Solomon
(RS) coding to achieve a remarkable performance even under worst HF propagation
conditions. Data are modulated onto eight tones spaced 250 Hz. The modulation
rate of each tone is 62.5 Baud. The supported modulation techniques include
binary phase-shift keying (PSK2A), quaternary PSK (PSK4A), 8-PSK (PSK8A), 16-PSK
(PSK16A), binary amplitude-shift keying combined with 8-PSK (ASK2PSK8),
quaternary ASK combined with 16-PSK (ASK4PSK16), and two-channel diversity
binary PSK (2DPSK2A).
RS coding is utilized to correct transmission errors. Four coding levels (called
RS Efficiency) are specified, which allow for more or less error correction
within a block.
The level of RS Efficiency is automatically detected by the demodulator.
After successful synchronization, it may take several tens of seconds before any
text is output in the GUI. The percentages in the following list of coding
levels, relate the number of information symbols (user data) to the block
length, a block comprises user data and parity check symbols: