ASTi Telestra User's Guide download pdf (Page 110)

ASTi Telestra User Guide (Ver. 2, Rev. L.1)

a. The radios scan list includes the call frequency

b. The radio is currently in ALE Scanning mode

c. The radio is on the same DIS exercise ID as the calling radio

4. For those radios that meet the above three criteria, the ALE Server makes requests to the

HF Server to compute an estimate of the Link Quality Assessment number. The LQA

number is based on signal-to-noise ratio at the receiving radio, and is a number between 0

and 255.

5. The ALE Server responds to the host by sending an ALE TX Response Message. This

message consists of a list of the DIS IDs of valid receivers, and the computed LQA num-

ber for those radios.

6. The host takes appropriate actions based on the LQA numbers received from the ALE

Server. This can include initiating HF communications between the Calling Radio and

valid receivers.

Using this simple ALL CALL type sequence, the host can build up more complex calling proce-

dures such as GROUP CALLs, NET CALLs, etc.

System Conﬁguration

Conﬁgure the HF Server, as detailed in Chapter 10. The IP address of the ALE server is identical

to that of the HF Server. The host should initialize the HF Server with appropriate environmental

data, as described in Chapter 10.

Note that since the ALE Server is not interacting directly with the DACS, no changes to the DACS

conﬁguration is required to use the ALE Server. However, if you want to use the HF Server for HF

propagation in conjunction with ALE functionality, the DACS must be conﬁgured as described in

Chapter 10.

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ASTi Telestra User's Guide Page 110