Becker GK615-X, Инструкция по установке и эксплуатации

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GK615-X
DV 16800.03 Issue 1 12/11 Page 3-5
Operating Frequency
(MHz)
Channel Spacing
(kHz)
Displayed Frequency
in 8.33+25 kHz mixed
Mode
Displayed Frequency
in 25 kHz Mode
136.9750 25 136.975 136.97
136.9750 8.33 136.980 N/A
136.9833 8.33 136.985 N/A
136.9916 8.33 136.990 N/A
3.2 Operating instructions
3.2.1 Receive and Transmit Operation
3.2.1.1 Receive Operation
If PTT key is not pressed, the transceiver stays in receive operation.
In receive operation the headset and (if enabled) the speaker output providing a mixed signal consi-
sting of: received signal from antenna on operating frequency and- signal from auxiliary input (if enab-
led)
In receive operation user actions are allowed (changing operation modes, channel spacing, menus,
storing, external intercom, …. ).
3.2.1.2 Transmit Operation
If PTT is pressed the transceiver switches into transmit operation. Microphone(s) signals are modula-
ting the transmitter.
Transmit operation is indicated by the “TX” symbol on the left upper corner of the display
In TX operation, the most user actions (changing operation mode, channel spacing …) normally allo-
wed in receive operation are blocked. As an exception, the preset frequency in standard mode may still
be changed even during transmission.
During TX operation, the sidetone (demodulated audio of the emitted signal) is available on the he-
adphone output. The speaker is switched off.
Note:
Transmit operation will automatically be terminated (return to receive operation) after 120 seconds of
continuous transmitting even if PTT is still pressed. In this case “STUCK PTT” will be indicated (refer
chapter ). For initiating a new transmission, PTT line needs first to become inactive.