sunair RT-9000C, Руководство по эксплуатации и обслуживанию

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Document No. 8128000560
Software Revision – N1B (07 Oct 04)
7-75
RT-9000 B
Depressing the 'ST-SND' (Start Sound) key at 3 will initiate the Sounding process and transmit on every
frequency (Channel) in the currently selected Channel Group. The Operational Display shown in Figure
7.3.4.22 will appear and indicate the following information: 1) Transmitter operation ('XMT'), 2) Operating
frequency and Channel Number, and 3) 'SOUNDING' = Sounding transmission is being transmitted.
Figure 7.3.4.22 ALE Sounding – Initiating Station Display
After the Sounding process has finished, the Operational Display will continuously display a ‘TX-SCAN
TERMINATED’ message. The Feature Menu will remain unchanged from that shown in Figure 7.3.4.21.
At this point, the station Transmitting the Sounding call may do the following:
a) Repeat the Sounding transmission. Depressing the 'ST-SND' (Start Sound) key again will re-transmit
the Sounding transmission.
b) Leave the ‘Sounding’ Menu and return to the ALE Transmit (‘TX-ALE’) and Receive (‘RX-ALE’) menu.
Depressing the ‘END’ key at 4 will cause the Feature Menu shown in Figure 7.3.4.13 to reappear.
Normal ALE operation may continue.
c) Leave ALE Operating mode and return to the Main Menu. After returning to ALE Transmit (‘TX-ALE’)
and Receive (‘RX-ALE’) menu as described in step b) above, depressing the ‘END’ key once again
will cause the RT-9000 B to immediately leave ALE mode, return to the Main Menu, and resume
normal operation.
NOTE : From time to time, the sounding process may skip certain channels and
not sound on those frequencies. This is a normal occurrence; the system
monitors each channel before Sounding. Depending on the channel
activity, the RT-9000 B may or may not transmit if the Channel is busy.
7.3.4.5.2 Receiving a SOUND
To receive an ALE Sounding transmission, the RT-9000 B must currently be in ALE Receive (‘RX-ALE’) mode
and scanning. The Channel Group currently selected should include all or most of the same frequencies
being used by the Initiating Station. When the RT-9000 B receives a Sounding transmission, Receiver
scanning will stop on the frequency of the Sounding transmission.
The Operational Display shown in Figure 7.3.4.23 will indicate the following information: 1) Operating
frequency and Channel Number, 2) ‘SO’ = Sounding transmission is being received, 3) ‘SUN1’ = station
CALL ID of the station transmitting the Sound, and 4) ‘F’ = Link Quality Analysis (LQA) value of the received
Sounding frequency.
RCV MHZ
FUNCTION/
STATUS
CH 00 9.16717
SOUNDING
XMT
METER
S3 S6 S9 +20 +40 +60
20 60 100 150 FWD