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DVR-3901 Installation and Operation Manual
Chapter 5: Functions and Controls
Audio Outputs
One channel pair of audio is output to AES, embedded onto SDI video
output, and output to the audio monitoring port. Use the
EmbEn
parameter to enable Audio embedding or
EmbGrpSel
to enable group
selection. The channel-pair is embedded in the selected group on both
channel-pair 1 and channel-pair 2. The embedder will overwrite the
designated audio group if it exists.
Use the provided RCA jack to monitor mono audio. Select from the
mono output options of “Left”, “Right”, or “Mixed Left and Right,”
using the
AmonMode
parameter.
You can generate audio tone at any time using the
ToneEnable
parameter. Use the
ToneFreq
and
ToneGain
parameters to adjust the
tone frequency and gain. The tone will not be recorded when it is turned
on.
Audio Proc Amps
There are two separate built-in audio processing-and-amplifiers
(procamps), one for the recording path and the other for the playback
path. They can be enabled or disabled by the parameters
AP_Rec
and
AP_Play
. Once a parameter is set to Enabled, you can adjust the audio
level and invert the phase for the left and right channels.
Genlock and DARS
Use the
RefVid
parameter to lock the video to the selected video source
on the DVR-3901 using the Genlock circuit. This video source can be
reference video input, SDI video input, or free running.
Adjust video timing via the
Vphase
and
Hphase
parameters.
For reference video input, the
GlStdFb
parameter is used to show the
standard that has been detected, and
GlVPrsnt
indicates it is present. If
PAL-M is being used as reference video,
GlStdFb
will indicate NTSC
instead, but the SDI video output timing is still correct.
The DVR-3901 offers the capability of DARS (digital audio reference
signal) locking so that the AES output complies to AES-11 standard.
You can turn DARS locking on and off via the
DARS_Src
parameter.
When you set the parameter to AES IN, the DARS input is shared with
the AES IN port. The AES OUT timing will then lock to the DARS
input. Adjust the
DARS_Phase
parameter to achieve your desired
Note
DARS should always be 48 kHz
sample rate.
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