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SRP9170/80 P25 Portable Radio – User Manual

Note that if Autoscan is programmed for that channel, the Scan key will not function.

6.13 SCAN EDIT

This key is used to enter the Scan Edit menu, where the members of a scan group can be

added or deleted.

6.14 SCRAMBLER (P25 ANALOGUE)

This function enables transmitted voice to be scrambled, to prevent radios without a

scrambler from listening in on the conversation.

This low security form of encryption is sufficient to make speech unintelligible to other casual

listeners, however it does not offer high level security as other radios programmed with a

scrambler function will be able to unscramble it.

Supported in analogue mode only.

The speaker sounds a ‘bip-bip’ tone when PTT is pressed to indicate that scrambler is active.

Scrambler On/Off state is reset to Off at power-up and channel change.

First press of the function key enables scrambler mode.

The 2

press restores channel to normal (clear) mode.

6.15 SKIP

The Skip function key is used to temporarily remove members from a scan channel. The

removal is temporary only until the channel is changed.

6.16 SQUELCH

The squelch mode is used to selectively receive P25 signals. It has three modes, Monitor,

Normal and Selective. When set to Monitor, all P25 traffic on that channel will be heard,

subject to presence of encryption. Normal mode will hear all P25 traffic with the correct NAC

code. Selective mode will only receive calls to the channel default talkgroup and individual

calls.

6.17 TALKAROUND

On a repeater channel only, this function key allows the radio to transmit on the base

station’s output channel, so the user can talk directly to other mobiles on the channel, while

the repeater is out of service or out of range.

When the key is pressed again (or the Channel is changed) the mobile’s transmitter channel

reverts to its normal setting.

Talkaround mode is indicating to the user by a double beep at the start of each PTT.

6.18 ZONE

This function provides a shortcut to the detailed zone menu.

Simoco P25 User Manual

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