User's Manual

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Jotron AS| TR7750C: Operators Manual  Installation

Page 4-10

P/N: 84748 (G)

Menu path:

TX config ►

Parameter

Range

Default

Details

Keying

(TX)

Source

Mic, line, txkey,

txgnd, inband

Mic, txkey

Determines what signal that will be used as

the source for keying the transmitter.

Any combinations can be set

 Mic: Local PTT input from a

microphone, where the PTT is

connected to pin 4 and 8(gnd) on

the Mic/headset connector.

 Line: Keying from a phantom

signal on the line input. Pin 3 and 6

on the Rem/TR connector.

 Txkey: The transmitter is keyed by

an external voltage on the

TXKEY_P and TXKEY_N input

pins. Signals located on Pin 7 and

8 on the | connector.

 Txgnd: The transmitter is keyed by

a signal on the TX_KEY_G input

pin Signals are located on Pin 4

and 8 (gnd) on the REM/TR

connector.

 Inband: The transmitter is keyed

using an inband tone (see also

inband frequency and inband

sensitivity)

Table 4.6-6, Key Source settings