FP520 Service Manual
Page 16 of 64
Chapter 4 Function Description and Parameter Settings
4.1 Time-out Timer
This feature prevents the user from long occupation of the channel. If the transmitting period exceeds the
dealer’s preprogrammed time, the radio stops transmitting and the rings alert tone. To stop the alert tone, please
release the PTT button. For a second transmission, please press the PTT button after a certain period (set by
the dealer). If the dealer preprograms the pre-warning feature, a warning is given when the transmitting period
gets close to its time-out-timer limitation, indicating the transmission is forbidden soon.
4.2 Channel Scan
The channel scan is able to search for the channel where there is a signal, and the radio stays on the channel
where a signal is detected for making a conversation. The scanning mode is the carrier control scan.
4.2.1 Carrier Control Scan
The radio scan stays on a busy channel until it is no longer busy, and the scan is enabled automatically after a
certain period (the specific period time is set by the local dealer).
Press the Scan shortcut key, and the radio scans the scan list of the current channel. When the radio is scanning,
you can press the
“Scan” shortcut key to stop the scanning.
4.2.2 Scan Reply Channel
When the radio is scanning, press the PTT button to transmit and make a conversation on a preset channel, and
the channel is preprogrammed by the local dealer.
4.3 Kill and Activation
If the dealer preprograms this feature, the radio can receive and decode
other radio’s signals of kill and
activation before responding accordingly. After being killed, the radio can only receive the activated signal
without being able to transmit or receive other signals. The radio is back to normal after activation.
4.4 Emergency
In a state of emerge
ncy, press the “Emergency On” shortcut key for the alarm call. The alarm method is
composed of two parts: Alarm type, which mainly specifies the acoustooptic reaction in the state of alarm call;
Alarm mode, which specifies the sending content in the state of alarm call. You can set these parameters
through the dealer to meet your requirements. To disable the emergency feature, please press the “Emergency
O
ff” shortcut key.
Alarm Type
:
◆
None: No alarm feature (by default), and the alarm feature cannot be enabled by pressing the emergency
button.
◆
Siren Only: The radio only emits siren locally.
◆
Regular: The acoustooptic alert can be enabled, and the radio is able to receive.
◆
Secret: No acoustooptic alert and the radio is not able to receive.
◆
Secret but receivable: No acoustooptic alert but the radio is able to receive.
Alarm Mode:
Summary of Contents for FP520
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Page 44: ...FP520 Service Manual Page 43 of 64 Figure 1 FP520 01 Mainboard Schematic Diagram 136 174MHz ...
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Page 54: ...FP520 Service Manual Page 53 of 64 Figure 4 FP520 02 Mainboard Schematic Diagram 400 470MHz ...
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Page 64: ...FP520 Service Manual Page 63 of 64 Figure 7 KBC 51 7 4V Electrical Schematic Diagram ...