Micom 3T Operations Instructions download pdf (Page 60)

MICOM-3F/3T/3R HF-SSB Owner’s Guide

During operation, the MICOM radio scans all the frequencies included in the defined nets:

• When the radio receives a call, it responds with the self-address that is programmed in the radio

for that net.

• When initiating a call, you select the net you want to transmit to, and then select an address (a

specific station, or any other type of address you wish to use). The radio then looks up the

frequencies that are associated with the station you call and uses only those frequencies to call

that station.

• LQA exchanges and sounding use only frequencies associated with the currently selected net.

Note that the time needed to scan multiple nets may be rather long, even when using the rather fast

5 channels/second scan rate. Moreover, the duration of a call set up request must also be long

enough to ensure that your call reaches all the relevant nets. You can use the MaxScanCh parameter

(an ALE programming option) to change the duration: the default, when AUTO is selected, is about 7

seconds; however you can select a different value, in the range of 1 to 59 seconds. Make sure to use

the minimum value that ensures all the nets will hear your call set up request, because long durations

are very disruptive.

Messages

The ALE enables you to create, send or receive alphanumeric messages (“paging” messages) in

accordance with the AMD (Automatic Display Message) definition in Federal Standard FS-1045.

The messages are displayed on the receiving station LCD display, and can be up to 90 characters

long. Messages can be added to any type of call, whether individual, group, net, AllCall, AnyCall,

bidirectional handshake, etc. You can create up to 12 messages, and can edit or erase any of the

messages at any time.

Using the Caller Stack

The caller stack is an internal memory that stores a list of unanswered calls. Each stack entry contains

the self address of the calling station and a message (AMD) if any was sent. You can view the list,

return a call and view any message sent with any call.

The stack can contain up to 10 calls. The radio records an address in the stack only once even if the

same caller makes repeated unanswered calls. However, if the same caller sent calls with different

messages, all such calls will be saved in the stack. Each stack entry is referred to as a Page.

The appearance of the word STAK next to one of the function buttons of the LCD display indicates

that there is at least one call in the stack. The STAK indicator is automatically turned off when all

pages in the stack have been erased.

The stack is arranged in FIFO order, that is, the first address that enters the stack is also the first that

you see on the display. If the stack is full and a new call is received, the oldest call in the stack is

automatically erased.

For convenience, addresses appearing in the stack can be easily added to the ALE address directory.

Quick Call

During a call, the radio saves the latest destination information as the quick call information. When

the user presses the PTT of the microphone or handset twice in rapid sequence, the radio

automatically directs the call to that address.

In the ALE mode, channel information is also retained and used for quick calls.

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Micom 3T Operations Instructions Page 60