User's Manual

Table Of Contents

ASTRO Digital XTS 5000 Model III 75

Special Radio Features

Secure Operations

Secure radio operation provides the highest commercially available

level of voice security on both trunked and conventional channels.

Unlike other forms of security, Motorola digital encryption provides

signalling that makes it virtually impossible for others to decode any

part of an encrypted message.

Select Secure Transmissions

Select Clear Transmissions

Turn the preprogrammed

Secure/Clear switch to the

secure position (D).

Note:

If the selected channel

is programmed for clear-

only operation

— when

you press the PTT

button, you see CC

, and you hear an

invalid mode tone.

• Invalid mode tone

The radio will not transmit until you set the Secure/

Clear switch to the clear position (E).

Turn the preprogrammed Secure/Clear switch to the clear

position (E).

Note:

If the selected channel

is programmed for

secure-only operation

—

when you press the PTT

button, you see SS

, and you hear an

invalid mode tone.

• Invalid mode tone

The radio will not transmit until you set the Secure/

Clear switch to the secure position (D).

95C08-O_XTS5k_800MHz_Mdl3.book Page 75 Monday, August 27, 2001 9:09 AM