jotron RA-7203C, Руководство оператора

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Jotron AS| TR7750C: Operators Manual

Operating Instructions Page 5-9
P/N: 84748 (G)
Menu path:
TX config ► Parameter Range Default Details
Audio Input source Auto | Line | Mic
| modgen | VoIP Auto The input source determines where the audio
is applied to the transmitter.

Auto : Uses line input for when a
key signal is detected on one of
the remote connectors and mic
input if the key signal is detected
on the front panel connector.

Line : Uses the 600 ohm line
interface as the audio source

Mic : Uses the microphone input as
the audio source

Modgen : Uses the internal
modgen as audio input source
– se
also Modgen frequency

VoIP : Uses the IP interface as the
audio source (availability depends
on radio specifications).
Audio Mic sensitivity -40
– 0 dBm
1 dB steps
-25 dBm Set the gain (sensitivity) for the microphone
connected to the front panel connector.
Use this setting to increase or decrease the
gain if needed. Setting depends on
microphone used.
Audio Line sensitivity -40
– 0 dBm
1 dB steps
-17 dBm Set the sensitivity of the 600 ohm line input.
This setting determines where the VOGAD
(automatic gain control) start to operate.
Thus if it is set to -17 dBm, levels above -17
dBm will be modulated with 85% (default
setting).
For levels below -17 dBm the modulation will
decrease linearly.
Audio Line termination
OFF | 600 ohm 600 ohm Set the termination of the input line to either
OFF or 600 ohm . Normally this is set to 600
ohm, but can be set to OFF on one of the
radios, if two transmitters are connected in
parallel. This is to maintain the 600 ohm
impedance on the lines.
Audio Line mute level OFF or
-40 to -10dBm
1 dB steps OFF Below this level, the line input will be muted.
Used where noisy lines are connected to the
transmitter to avoid unnecessary noise on
the produced RF signal during periods of
silence (Automatic transmissions; VOLMET,
ATIS)
Audio Monitor output Headset |
Monitor output Monitor
output Set where the monitor output signal and the
received audio (if a receiver is connected) is
routed.
Can be set to the headset connector, the 600
ohm monitor line output or both.
The monitor signal is the demodulated signal
detected on the output of the transmitter.
Audio Monitor level -80
– 10 dBm
-50 dBm Set the relative output level of the monitor
signal.
Audio VOGAD Off, x-fast, fast,
norm, slow, x-
slow Norm Set the attack and decrease time of the
automatic gain control (VOGAD).

Off is used only for maintenance
purposes.
Audio Modgen frequency 100
– 5000 Hz
1 Hz steps
1003 Hz Set the frequency of the internal modulation
generator. Used in conjunction with the
Audio input source
Audio Line=>Head gain -10 to +20 dB 0 dB Defines the scaling factor of the Rx Audio on
the headset output when the transmitter is
connected to a receiver.
The level is a relative value -10 to +20 dB