Loss Indication; Select An Encryption Key (Conventional Only) - Motorola W4 User Manual

Secure Operation
transmission during a call, the radio generates a talk-prohibit tone,
and the display will show SEC ONLY or SECURE ONLY .
• Digital trunking systems: You are allowed to change from a
secure transmission to a clear transmission during a secure
trunked call.

Loss Indication

When you press the PTT button while in the coded mode and without
the encryption module containing a valid key, the speaker generates
bursts of alert tones, and the display shows KEY FAIL until you
release the PTT button.
When the radio is first turned on, six medium-pitched tones sound
and the display momentarily shows KEY FAIL to indicate that the
encryption module does not contain a valid key for the current mode.
If the periodic keyfail tone feature is enabled, six medium-pitched
tones are generated every five to ten seconds while the radio is not
transmitting or receiving to remind you that the radio does not have a
valid key for the current mode. The keyfail reminder will not sound
when the radio is in clear mode.

Select an Encryption Key (Conventional Only)

The Select Key feature allows you to manually select any one of the
16 encryption keys.
If the current mode is programmed with key selection being strapped
to force the current mode to use a predetermined key, the Select Key
menu will not appear as a Secure menu item.
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