6
2.2. Specification for ACC-514
Modulation type
: FFSK
Maximum RF Baud rate
: 2400 for 12.5KHz channel spacing and 4800 for
25KHz channel spacing
(Programmable, see below table)
Data Sensitivity
: below
–
110dBm for 1 in 100 error rate
Mark /Space tone freq.
(for each available RF Baud rate)
: 1200Hz (M) / 1800Hz (S) at 1200bps
1200Hz (M) / 2400Hz (S) at 2400bps
2400Hz (M) / 4800Hz (S) at 4800bps
Data input/output
: RS232
RS232 Baud input rate
: follow the RF Baud rate (see below table)
Number of Data Bit
: 8 bits
Parity
: None
Number of Stop Bit
: 1 bit
Data flow control
: None, Software(Xon/Xoff),
Hardware(RTS/CTS) (Programmable)
Tx forcing mode
: Configures the modem to transmit regardless of
squelch state
Data Block (Packet) size
: Programmable from 16bytes to 8192bytes by
multiple of 16bytes increments. To provide
maximum flexibility, packet doesn
’
t include
additional
bits
for
error
detection
and
correction.
We recommend that the User adds their own
methods for error detection/correction.
Channel Space
DTE Baud Rate
Modem Baud Rate
1200
1200
Narrow (12.5KHz)
2400
2400
1200
1200
2400
2400
Standard (25KHz)
4800
4800
Table 2.2. Available Baud rate for FFSK modem
