Operator's Manual

ManualsBrandsElbit Systems Land and C4I - Tadiran ManualsElectronicsLicensed Non-Broadcast Station Transmitter - MICOM Z-Trunk

OM-E 2072-09689-00

2-28

2-12. USING AUTOMATIC LINK ESTABLISHMENT (ALE)

The Micom-Z unit supports the Automatic Link Establishment (ALE) function, a method that enables

automatically selecting the best working channel from a group of preprogrammed channels without

any user intervention, thereby facilitating communication among HF radio stations and improving the

communications quality and reliability. The ALE function incorporates all the advanced data

transmission techniques required by MIL-STD-188-141B and FED-STD-1045. For an overview of

Micom-Z ALE capabilities and services, refer to Appendix A.

The ALE function ensures the best possible link without requiring prior knowledge of radio

communication conditions, and thus enables reliable HF communication even under rapidly changing

propagation conditions. For this purpose, HF radio sets using the ALE function continuously monitor

and evaluate the transmission quality on each frequency assigned for communication, and

automatically select an optimal frequency for each transmission. After selecting the optimal frequency,

a link between the communicating stations is established via an automatic handshake process, which is

performed without requiring operator’s intervention.

ALE combines sounding, scanning, selective calling, channel selection and LQA (Link Quality

Analysis). These features, all automatic, ensure that communication takes place on the channel with

the best link quality, even with an unskilled operator. The ALE also includes many types of calls you

can use to rapidly and efficiently set up links with other ALE users, and features such as messages,

stack and quick call.

ALE supports many features, including:

• Various type of calls

• Up to 20 nets, each with its own set of members and associated frequencies (channels)

• Up to 100 ALE addresses in the directory

• Up to 100 scan channels

• Up to 12 AMD (paging) messages.

All the ALE features you can use on your radio can be programmed: to program or modify features,

you can use the front panel of the radio, as described in Chapter 4. The ALE features can also be

preprogrammed using the MRC.

The following sections provide instructions for communicating in the ALE mode for a radio that has

already been programmed with the necessary parameters in accordance with Chapter 4.

Note that when the ALE mode is enabled, your radio can receive and transmit ALE calls even when

you are using the Channel mode. For this purpose, the CALL key is displayed even in the Channel

mode (see Figure 2-2). The only restriction is that in the Channel mode, Micom-Z uses only the ALE

parameters of net 1. Therefore, if net 1 is not programmed, no ALE functionality is available in the

Channel mode, even when the ALE mode is enabled.

Note that the radio will prevent users from performing calls on Rx only (RXO) or Tx only (TXO)

channels. This is true even when operating in the Channel mode: when selecting a Rx Only or Tx Only

channel, the ALE option is disabled (the CALL key is not displayed when such a channel is selected).

2-12.1 Enabling the ALE Mode

To enter the ALE mode:

1. Press MENU to display the Menu screen.

NOTE

If you see CCIR or SCAN next to F3, first enable the ALE

mode. To enable ALE, select ALE on MENU > MORE >

PROG > RAD > OPTS > SLCL.

FREQCHAN ALE

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