All sensors are provided by Kongsberg Maritime with predefined communication channels.
NoteIt may be required to change one or more communication channels, and there may be many reasons for this.
|
• |
You have more than one of each sensor. For example, if you have three temperature sensors, they MUST communicate on three different channels. |
|
• |
Other vessels near yours use the same catch monitoring system (or similar) and they have one or more of their sensors set
up to the same communication channels as you have. This will create interference as you will “read” other sensors. |
|
• |
If your sensors are set up to use communication channels too close to each other (for example, if you have chosen channels
4, 5 and 6), this will limit the speed of the vessel. The reason for this is the Doppler effect. |
|
• |
If you operate at the maximum range of the sensors, you may be able to increase this range slightly if you use lower communication
channels. This is because the lower communication channels use lower transmission frequencies. |
Our catch monitoring sensors communicate on a frequency range from 40 to 50 kHz. The following table shows the equivalence of communication channels to frequencies of different catch monitoring sensors
Frequencies (kHz) |
PX TrawlEye Channel |
PX MultiSensor Mk2 Channel |
PX MultiCatch Channel |
PX Universal Channel |
PX Flow Channel |
PI Sensors Channel |
39.4 - 40.7 |
1 |
1L |
1L |
1L |
1L |
Not used |
1H |
1H |
1H |
1H |
40.8 - 42.1 |
2 |
2L |
2L |
2L |
2L |
Not used |
2H |
2H |
2H |
2H |
42.2 - 43.5 |
3 |
3L |
3L |
3L |
3L |
Not used |
3H |
3H |
3H |
3H |
43.6 - 44.9 |
4 |
4L |
4L |
4L |
4L |
1 – 30 |
4H |
4H |
4H |
4H |
45.0 - 46.3 |
5 |
5L |
5L |
5L |
5L |
5H |
5H |
5H |
5H |
46.4 - 47.7 |
6 |
6L |
6L |
6L |
6L |
6H |
6H |
6H |
6H |
47.8 - 49.1 |
7 |
7L |
7L |
7L |
7L |
7H |
7H |
7H |
7H |
49.2 - 50.5 |
8 |
8L |
8L |
8L |
8L |
8H |
8H |
8H |
8H |
Not used |
Make sure you do not have any interfering channel if you have a PI Receiver working simultaneously with an SR15 or SR70 Receiver.
Simrad PxPos and ITI sensors frequencies
Sensor type
|
Interrogation frequency [Hz] |
Reply frequency 1 [Hz] |
Reply frequency 2 [Hz] |
Reply frequency 3 [Hz] |
Depth |
27489 |
27306 |
27675 |
— |
Depth / Temperature / Remote 1 & 2 |
27489 |
27306 |
27675 |
27306 |
Catch 1 |
28845 |
28444 |
29045 |
— |
Catch 2 |
28845 |
28643 |
29257 |
— |
Catch 3 |
28845 |
29467 |
29897 |
— |
Height 1 |
30340 |
30117 |
30567 |
30117 |
Height 2 |
31030 |
30796 |
31267 |
30796 |
Spread 1 |
31751 |
31507 |
32000 |
— |
Spread 2 |
32251 |
31507 |
32000 |
— |
SR15 and SR70 Receiver Units
|
• |
Frequency range: 39.4 to 50.5 kHz. |
|
• |
An SR type receiver has 8 communication channels when interfacing the following sensor/sensors: |
|
• |
An SR type receiver has 16 communication channels (1 Low to 8 High) when interfacing the following sensor/sensors: |
PI50 and PI60 Receiver Units
|
• |
The PI50/PI60 Receiver Units frequency range is from 43.6 to 49.4 kHz. It works in the same operational frequency band as PX TrawlEye sensor channels 4 to 8 and the rest of PX sensors channels
4L to 8H. |
|
• |
The PI50/PI60 Receiver Units channels are 1 to 30. |
Lower frequencies are better for long range communications. If you need long-range communication, you should use low channels.