Sony ILME-FX3 Help Manual page 320

Even when the HANDLE AUDIO switch is set to ON, audio from the XLR adaptor cannot be recorded while an external
microphone is connected to the camera.
You cannot adjust the recording volume level for external audio devices connected to the XLR adaptor.
While recording is in progress, do not change the INPUT1 or INPUT2 switch settings.
Before connecting/disconnecting an external microphone or device to/from the INPUT1 or INPUT2 jack, be sure to set the
INPUT1 (LINE/MIC/MIC+48V) or INPUT2 (LINE/MIC/MIC+48V) switch to a position other than "MIC+48V." Plugging/unplugging
the cable into/from the external microphone or device while the switch is set to "MIC+48V" may cause loud noise or a malfunction
of the device.
Before attaching/removing a microphone (sold separately) to/from the adaptor, be sure to set the INPUT1 (LINE/MIC/MIC+48V)
switch to a position other than "MIC+48V." While the switch is set to "MIC+48V," plugging/unplugging the cable into/from the
microphone may cause a loud noise or a malfunction of the microphone.
If there is noticeable noise coming from the jacks with no device connected to them, set the INPUT1 (LINE/MIC/MIC+48V) or
INPUT2 (LINE/MIC/MIC+48V) switch to "LINE."
When the INPUT1 (LINE/MIC/MIC+48V) or INPUT2 (LINE/MIC/MIC+48V) switch is set to "LINE," the standard input level is
locked to +4 dBu. The standard input level will not change according to the ATT switch setting.
Related Topic
XLR handle unit
Attaching the supplied XLR handle unit
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