6.1 ConfiguraƟon group
PTT from I/O: Line
PTT from RTP: VoIP
Line: Uses the 600 Ω line interface as the audio source.
Mic: Uses the microphone input as the audio source.
Modgen: Uses the internal modgen as audio input source – see also Modgen frequency.
VoIP: Uses the IP interface as the audio source.
• Mic sensivity
– Range: -40to0dBin1dBsteps
– Default: -21 dB
– Details: Set the VOGAD sensivity for the microphone connected to the front panel connector. Use
this seng to increase or decrease the gain if needed. Seng depends on microphone used.
• Mic Bias
– Range: On|Off
– Default: On
– Details: Enabled or disables microphone bias on the microphone connector (pin 1). When set to
On, there will bea8Vbias available on the microphone input pin. Used for electret microphones
that requires a bias voltage.
• Headset / Speaker Mic
– Range: Headset | Speaker Mic
– Default: Speaker Mic
– Details: This seng selects the use of an external speaker mic, like the Jotron 81339, or a headset.
Normally a headset has much higher sensivity than the speaker mic, and this seng adjusts the
output power level of the Mic/headset connector on the front panel. Always select Headset if a
headset is used. If le in Speaker Mic mode, the power output will be much higher and the audio
volume in the headset may be too loud. Listening at high volume levels for long periods may lead
to temporary or even permanent hearing impairment.
• Line sensivity
– Range: -40 to 10 dBm in 1 dB steps
– Default: -22 dBm
– Details: Set the VOGAD sensivity of the 600 Ω line input. This seng determines where the
VOGAD (automac gain control) start to operate. Thus, if it is set to -22 dBm, levels above -22
dBm will be modulated with 85% (default seng). For levels below -22 dBm the modulaon will
decrease linearly.
• Monitor output
– Range: Headphone, Monitor line, VoIP (Availability of certain choices depends on opons enabled)
– Default: Headphone, Monitor line
Doc. No.: 103614 TR-910 Operator Rev. AB jotron.com 47
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