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4-28
PSNR
VALUE
20+
19–25
14–12
11–10
10>
Communicating with a Remote Modem
The UDB-9000 can be used to send commands to an instrument that is
connected to a remote modem and to receive messages from a remote
modem. The commands to be sent are entered and displayed in the touch
screen display using an on screen keyboard. Although only one command
can be created and sent at a time, the command settings can be prepared
prior to creating and sending the commands for up to three modems,
designated Remote A, Remote B and Remote C. However, before
communicating with a remote modem, its address must be selected. Before
sending commands, always ensure that the transducer is connected.
Selecting the Remote
Modem Address
To select the address of the remote
modem to be communicated with:
1. Touch the Modem Comms function
button.
The Modem Comms screen opens.
2. Touch the Remote A, Remote B or
Remote C tab to open the tab. The
tab label indicates the current
remote modem address setting.
User's Manual
Table 4-1 PSNR Value and Required Action
Signal quality is high. Can use a lower power level or higher acoustic baud
rate.
Signal quality is good.
Signal quality is acceptable. If multipath is a factor, a lower power level
may improve the signal quality, otherwise go to a higher power level.
Signal quality is low. If multipath is a factor, a lower power level may
improve the signal quality, otherwise go to a higher power level. Also try
lowering the acoustic bit rate.
Signal quality is poor. If multipath is a factor, a lower power level may
improve the signal quality, otherwise go to a higher power level, also try
lowering the acoustic bit rate.
ACTION REQUIRED
Figure 4-37 Modem Comms
TELEDYNE BENTHOS
Screen
P/N M-270-10, Rev. B
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