User's Manual

SETTINGS

SETTINGS > CALLING > ALE

NVOY™ TRANSCEIVER REFERENCE MANUAL 225

With ALE calling, the transceiver may cycle through several channels before a link is

established. If you select Leading, the AMD information is always positioned in the

leading part of the call. The data is transmitted prior to any response from the called

station. If the transceiver abandons this channel and moves to the next best channel, it

sends the AMD information again prior to any response being received.

NOTE: The leading position is required for interoperability with older Codan

HF transceivers, and may be required for interoperability with

transceivers from other vendors.

If you select Auto, the transceiver determines the best position for the AMD

information in the call. It may move the AMD information from the leading part of

the call, sending it after a response is received from the other station. Auto is the

recommended value.

NOTE: When the Auto value is selected, the HF networks used to make the

call must have the privacy mode set to Plain.

ALE BER

The ALE BER entry increases or decreases the value of the BER threshold used in

BER testing.

ALE control information is sent and received in blocks of data called ALE words.

Each word is sent three times to reduce the effects of fading, interference and noise.

When the words are decoded, the transceiver records the number of errors that

occurred in the transmission.

The number of errors indicates the quality of the channel used. A BER of 0 indicates

perfect reception. A BER of 48 indicates that all bits of the ALE word were bad.

The ALE BER entry enables you to specify the number of errors that will be tolerated

in this test, which indicates the quality of the channels on which you are prepared to

accept calls.

Range: 0 to 48

Default value: 12

CAUTION: It is recommended that this entry is not altered from the default value.