sunair RT-9000C, Руководство по эксплуатации и обслуживанию, Страница: 306 / 393

Document No. 8128000560
Software Revision – N1B (07 Oct 04)
7-74
RT-9000 B
Selecting or depressing any Feature Menu key while a Link is intact will cause a “Link Terminate” message to
be Transmitted and the “Break Link Process” to occur. A ‘LINK TERMINATE’ message will briefly appear in
the Operational Display and then automatically clear.
If the Initiating Station terminates the link, this station (the Called Station) will automatically revert to ALE
Receive (‘RX-ALE’) mode and resume scanning.
7.3.4.5 SOUNDING
Sounding is a calling method that transmits a one-way signal on each frequency in the currently selected
Channel Group to all Network stations. Sounding, of course, does not expect a response.
Sounding transmissions are used to update the signal propagation information stored in each Network
Station’s equipment. This information allows Network Stations to establish ALE links more quickly by
choosing frequencies with the best current conditions. The Sounding process is not required for contact with
other stations employing SUNAIR ALE Modems, since Link Quality Analysis (LQA) exchanges are always
performed as part of the Linking process and retained in memory for approximately 2 hours.
7.3.4.5.1 Manually Transmitting a SOUND
To manually transmit a Sound, depress the ‘*’/'ALE' key at
1 as shown in Figure 7.3.4.13. Depressing the
‘MORE’ key at 10 will cause the Feature Menu display shown in Figure 7.3.4.20 to appear.
Figure 7.3.4.20 ALE Calling Feature Menu
Depressing the ‘SOUND’ key at 2 will cause the Feature Menu shown in Figure 7.3.4.21 to appear.
Figure 7.3.4.21 ALE Sounding Feature Menu