Acoustic Modem, lowpower message
What happens if it is on is that when the Modem sees no activity for its defined stay awake period it will go to sleep and it will Tell You That. It looks like the following:
| Quote |
| 14:18:07>Lowpower > CONNECT 00800 bits/sec WAKEUP 14:21:11> 14:21:11>E,10.07.07 14:21:11,4E22,Invalid command. 14:21:11>Lowpower > CONNECT 00800 bits/sec WAKEUP 14:24:15> 14:24:15>E,10.07.07 14:24:15,4E22,Invalid command. |
Here it is connected to an AWAC with a NIP (Nortek Internal Processor). When the Lowpower message is sent out, it wakes up the sleeping NIP which responds with the Time-stamp command prompt and an error message since it does not recognize the message as a command. The time stamp command prompt and error message in turn wakes up the Acoustic Modem. Then after the allotted time passes again the cycle repeats itself. This will happen over and over again.... slowly drainging your batteries
So again, the solution is to turn off the Verbose mode. This is register S13 for the modem. To set this, you simply have to do the following steps:
1) Connect to the modem directly to your PC and in a terminal emulator send a '+++' in rapid succession. This will place the modem in Command Mode.
2) Send 'ATS13=0', this will set the verbose mode to OFF.
3) Send 'AT&W', this will save the register settings so they are used the next time power is cycled
4) Send 'ATO', this will set the modem back into Online Mode
Kind regards,
Torstein
I have a copy of the document "NORTEK ONLINE SOLUTIONS - THE NORTEK INTERNAL PROCESSOR" (Jan 2005) and it mentions that there may be issues with using a Benthos Modem with an AWAC
Quote:
Some limited testing has been performed with Benthos systems, but a full integration
has not yet been performed fully. Benthos has agreed to work together to overcome
any compatibility issues.
Have all other the compatibility issues been resolved?
If the Verbose mode is switched off can a NIP be used successfully with a Benthos modem?
regards
Gareth Cook
Hi Gareth,
Yes the Benthos modems may be used with an AWAC-NIP. I would encourage you to reduce the power output setting on the modem by 3 or 6 dB, I think believe that power from the AWAC-NIP had trouble delivering enough current for th full power setting for an earlier (and perhaps persent?) generation modem. This should not really be a problem since power level seems to have less influence on successful comms than one would think.
I should caution you for communications between modems over large horizontal distances, where it is hard to get a dependable channel. Large distances being greater than 400-500 meters in shallow waters - vertical comms for deep waters is reported to be fine.
-Torstein
Forgot your password?
New user?
