Robotron Pty Ltd G5E 사용자 설명서
WiNRADiO G3XX VHF/UHF Receiver
The higher the AGC reference level, the louder the maximum audio volume
(which can be then reduced by the volume control). However, with a high level
and strong signal levels there will be a distortion. Decreasing the AGC
reference level will result in lower audio levels.
(which can be then reduced by the volume control). However, with a high level
and strong signal levels there will be a distortion. Decreasing the AGC
reference level will result in lower audio levels.
The Audio gain setting is applicable only when SAGC is turned off, making it
possible to set a fixed gain level (i.e. the maximum volume) for each
demodulation mode separately.
possible to set a fixed gain level (i.e. the maximum volume) for each
demodulation mode separately.
Note:
1. SAGC is available only in AM, CW and SSB modes. (The FM demodulator
audio output is not dependent on the input signal level.)
audio output is not dependent on the input signal level.)
2. If the receiver volume appears too low (and yet the volume control is all the
way up), make sure that SAGC is enabled.
way up), make sure that SAGC is enabled.
3. If the sound is distorted despite the volume being turned down, make sure
that SAGC reference level is not set too high.
that SAGC reference level is not set too high.
4. If the sound is too weak when SAGC is disabled (and yet the volume control
is all the way up), use the Audio gain setting to increase the level.
is all the way up), use the Audio gain setting to increase the level.
AF Squelch (Audio Filter Squelch)
The AF Squelch is available only for the FM mode. In the absence of an input
signal any FM demodulator produces a strong noise, due to the random phase
variations of received atmospheric noise, and its own receiver noise.
signal any FM demodulator produces a strong noise, due to the random phase
variations of received atmospheric noise, and its own receiver noise.
The AF squelch implements a special filter to detect
such noise and compare its level to a preset
threshold. When the noise exceeds this threshold, the
receiver audio is muted.
such noise and compare its level to a preset
threshold. When the noise exceeds this threshold, the
receiver audio is muted.
The threshold level can be set in the AF Squelch edit box, either by direct
typing, using the up/down arrow buttons, or the little slider between the arrow
buttons.
typing, using the up/down arrow buttons, or the little slider between the arrow
buttons.
The Noise level indicator displays the actual noise level in a percentage of
white noise contents: zero represents pure signal without any noise, 100
represents pure white noise.
white noise contents: zero represents pure signal without any noise, 100
represents pure white noise.
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