Operation
12 025-9567E
seconds, the display will stop blinking and the ability to re-page the keyboard stack will be
lost. Even though the display is not cleared after a send, the encoder is still in the idle state
and new encoding information may be entered as described previously.
Sending Live Calls
The live formats (live DTMF or live ROTARY DIAL) allow the encoding tones to be sent as
each digit is pressed. To initiate a live call, first select the leading digit of a live format then
press a SEND key. Live format blocks may not be entered into the keyboard stack. After the
key-up sequence, the encoding may begin by manually pressing the desired keypad digits.
Transmission may be halted by pressing the
CLEAR ENTRY key or by allowing the five-
second keystroke time-out to expire. Sending live formats from remote control is not
possible.
Generating Alerts
Four separate alert tones may be generated from the tone output of the encoder by using the
ALERT key. Table 2 shows the available alert tone selections.
Table 2. Alert Tone Selections
Action Taken Alert Tone Produced
Display clear and ALERT pressed 1206 Hz tone
1 pressed then ALERT pressed Slow siren
2 pressed then ALERT pressed Fast siren
3 pressed then ALERT pressed Hi/Lo warble
The alert tones will be sent as long as the ALERT key is held down. While the alert is being
sent the PTT and audio relays close but none of the eight control relays will close because the
alert function is meant to key the channels already selected on the console. After the alert, the
display will clear. Unacceptable alert key sequences will cause an error beep.
An automatic customized alert is available that may be placed in a stack along with other
calls. The automatic alert is actually a format that is already resident in the encoder but it
must be enabled via programming before it may be used. The automatic alert format will
generate the same alert tones as the ALERT key with two exceptions; the tone ramp alert is
only available from the alert tone format, and instead of the steady 1206 Hz tone, the alert
format will generate a series of beeps. The number of beeps, the frequency of the beeps, the
beep duration, and the inter-beep gap are all programmable parameters of the auto-alert
format. The auto-alert format is accessed by keying-in the block number of the format
followed by a single digit that specifies the type of alert. The alert then may either be sent by
pressing a SEND key, or stacked with other calls by pressing the ENTER key. The alert-type
digit must be one of the following:
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