UDB-9000 Universal Deck Box - UDB-9000-M (Portable) and UDB-9000-MR (Rack Mount) Configurations 4-27
4 Operation using the Touch Screen Display Configuring and Checking a Remote Modem
"Selecting the Beep and Units Preferences" on page 4-14 to select
meters or feet for the range display. The same range information is also
displayed on the tab. If the range is not acquired, a no response
indication is displayed in the information window.
Testing the Acoustic Link with a Remote
Modem
The acoustic link between the UDB-9000 and a remote modem can be tested
by commanding the remote modem to transmit a preset test message at each
of several baud rates. The UDB-9000 measures and displays the received
data statistics which can be used to evaluate the acoustic link.
To test the acoustic link with a remote modem:
1. Touch the tab in the Modem Config screen for the modem to be tested.
2. On the tab, touch Test Acoustic
Link.
An information window temporarily
opens indicating that the acoustic
link for the remote modem is being
tested. When complete, the
window closes, and the Acoustic
Link Stats pop-up opens which
displays the received data statistics
as shown in Figure 4-36. If the test
message is not received, a no
response indication is displayed in
the information window.
3. Touch the X mark to close the Acoustic Link Stats pop-up.
The PSNR value is a measure of the processed SNR or signal quality. It is
affected by both signal strength and multipath. It can be used to determine
what the power level should be set to. Based on Table 4-1 on page 28 adjust
the power level and acoustic baud rate accordingly.
Figure 4-36 Acoustic Link Stats
Pop-Up
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