- 6 -
If switch 6 is left on for more than six seconds the unit will enter custom level
select mode – all group LEDs will flash red while the unit is in this mode. See
below for details.
Custom level select mode
To meet all international analogue audio full scale input levels the 4463A has a
custom analogue input level select mode. In this mode it is possible to select any
input level between 12dBu and 26dBu in 0.5dBu increments. The default value
of the custom level on delivery is 20dBu. Once the value of the custom level is
altered it will remain stored in memory until changed again.
To set the analogue input level:-
•
Activate switch 6, once this has been on for more than six seconds
the unit will enter custom level select mode. This can be verified by
all four group LEDs on the front of the box flashing red.
•
Switch 1-5 will now set the expected analogue input level as per the
table below.
•
To exit the custom level select mode deactivate switch 6, the value
on switches 1-5 will be stored in memory. It will be necessary to
reset switches 1-5 to the desired settings for normal use.
Switc
h 1
Switc
h2
Switc
h3
Switc
h 4
Switc
h 5
Lev
el
0 0 0 0 0 12dBu
0 0 0 0 1
12.5dBu
0 0 0 1 0 13dBu
0 0 0 1 1
13.5dBu
0 0 1 0 0 14dBu
0 0 1 0 1
14.5dBu
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
1 1 0 1 0
25.5dBu
1 1 0 1 1 26dBu
- 3 -
DTL MiniBlox™ - solutions in a box
General description
The 4463A is a broadcast quality unit that converts analogue composite video to
SDI then embeds two balanced stereo audio pairs into the ancillary data space of
the 270Mbps SDI signal.
The broadcast quality composite video to SDI conversion uses two 11 bit ADCs
with x4 oversampling and with five line adaptive comb filtering. A jitter filter
and digital time base corrector compensate for unstable input signals. Input
quality is automatically detected between VCR / CCTV and broadcast sources.
Audio is converted using a high quality 24 bit audio ADC and can be embedded
as 20 or 24 bit audio. Embedding conforms to SMPTE 272M and allows audio to
be inserted into any of the four groups.
It is housed in an extremely compact and rugged aluminium case ideally suited
to both studio and portable applications.
Main Features
•
•
•
Converts analogue composite video to SDI and inserts two balanced
analogue audio stereo pairs into any group
•
Auto select multi-standard input of PAL, NTSC & SECAM
•
Two 11 bit 4x oversampled video ADCs with 5 line adaptive comb
filtering
•
Automatic video gain control range from -3dB to 6dB
•
Jitter filter and digital TBC for unstable input signals
•
High quality 24 bit audio ADC
•
Selectable 20 or 24 bit embedding
•
Adjustable full scale input levels to meet all international standards
•
LEDs show group status and input signal presence
•
Extremely compact and rugged
