Furuno FAR-2107 Series Service Manual page 154

Pulse
Width
(u-sec) 0.125 0.25
B.W: 40 MHz
PRF: 3000 Hz
S1: 0.07
*ARPA 32 NM: 2200 Hz
*2nd: 3000 Hz
S2: 0.15
M1: 0.3
M2: 0.5
M3: 0.7
L : 1.2
Note:
- B.W (Band Width):
IF frequency: Receiving bandwidth of 60 MHz.
- PRF (Pulse Repetition Frequency):
The Repetition Frequency is not constant to avoid Radar interface from other radars.
The Jamming range is approximately ± 10 % of the Repetition Frequency. When the
Antenna is stopped, the Repetition Frequency is constant.
- ARPA 32NM:
The Repetition Frequency is changed when the ARPA tracking distance is set to
32 NM on [Menu] -> 0 -> 6 -> 9: MAX RENGE.
- 2nd: Repetition Frequency of the 2
The Repetition Frequency is changed when the setting on [Menu] -> 1 -> 1: 2ND
ECHO REJ is ON.
- There is no 120NM range in IMO and A type.
Range (NM)
0.5 0.75 1.5
B.W: 40 MHz
PRF: 3000 Hz
*ARPA 32 NM: 2200 Hz
*2nd: 3000 Hz
B.W: 10 MHz
PRF: 1500 Hz
*2nd: 500 Hz
nd
trace mode
1-17
Table 1.3.3 Transmitted Pulse Width and PRF
3 6 12
B.W: 10 MHz
PRF: 1000 Hz
*2nd: 500 Hz
B.W: 10 MHz
PRF: 1000 Hz
*2nd: 500 Hz
B.W: 3 MHz
PRF: 500 Hz
*2nd: 500 Hz
1.3 Specifications
24 48 96 120