User Operations Guide—Mira Instant Replay Server
Revised: 5 September 2014
Copyright ©2014, Abekas Incorporated
21
(N)
RS422 Ports
These RS422 serial control ports are used to control the video/audio channels of the Mira server from external controllers
capable of RS422 serial control, and which support either “Sony BVW-75”, “Odetics” and/or “Louth VDCP” protocols.
Each video channel in Mira features an RS422 serial control port, located through a break-out cable on the rear panel of the Mira
Server. At the end of the breakout cable are “Ethernet” type RJ45 connectors. Mira includes adapters for each RS422 serial port
to convert the RJ45 cable to 9D, so you can just plug a standard male 9D serial cable into the adapter.
These RJ45 cables for the RS422 serial ports are each wired 1:1 from the eight pins of the RJ45 to the first eight of the nine pins
in standard “D9” serial RS422 cables. A given installation of the Mira server may require use of the RJ45-to-D9 adapter
connector if RS422 serial control is routed via D9 connection.
These RS422 serial ports are used to control the video/audio channels of the Mira server from external controllers capable of
RS422 serial control, and which support either “Sony BVW-75,” “Odetics,” or “Louth VDCP” protocols.
(O)
Analog Audio Output
This 3.5mm female jack provides an analog monitoring output for two tracks (one stereo pair) of audio from any of the four video
channels in the ChA through ChD group of channels in the Mira server. By default, the output is set to monitor the stereo audio
output from the ChD video channel.
From the Mira Engineering Setup user interface, the stereo audio pair can be switched to monitor the audio output from any of
the other three video channels in the group; refer to the section “
” on page 208 below.
(P)
HD-SDI / SD-SDI Digital Video In/Out
These eight BNC connectors provide the serial digital video (SDI) inputs and outputs for the second group of four video channels
labeled ChA-ChD. Each BNC pair provides the IN and OUT for one video channel.
When operating the Mira server in standard-definition (SD) video formats, these BNC connectors accept and provide serial digital
video signals operating at a data rate of 270Mb/s (SD-SDI).
When operating the Mira server in high-definition (HD) mode, these BNC connectors accept and provide serial digital video
signals operating at data rate of 1.5Gb/s (HD-SDI).
NOTE:
It is not possible to operate the Mira server is both SD and HD mode at the same time; so these BNC connectors operate either in the SD-SDI
or
in
the HD-SDI mode at any given time.
(Q)
AES/EBU Tracks 1-2 Digital Audio In/Out
These eight BNC connectors provide the “Tracks 1-2” serial digital audio inputs and outputs for the four video channels built into
the Mira server. Each BNC pair provides the audio IN and OUT for one video channel.
NOTE:
Two tracks of digital audio on each video channel are supported via
AES
BNC connection, with 8 track total. However, digital audio embedded in the
HD-SDI video stream supports eight tracks of audio per video channel (32 tracks total); and in the SD-SDI video stream, four tracks are supported per video
channel (16 tracks total). In Q3 of 2011, two options will be available to expand the number of audio tracks: (a) Hardware
1RU “break
-
out” panel
option to
provide 8-track AES digital audio per video channel with 32 tracks total; and (b) Software option to provide 16-track embedded digital audio per video
channel with 64 tracks total, as embedded in the HD-SDI video streams.
