Ensemble Designs 7160 Serial Digital Protection DA - Manual (Page 10)

www.ensembledesigns.com 7160-10
Model 7160 HD/SD/ASI/310 Protection DA
Redundant Auto-Switched Conversion with 7160 Module
Auto-Switched Upconversion Application
The diagram below shows a typical use for the 7160 module, where it is used in conjunction with the
7900 Up/Down/Cross Converter module to form a fully-redundant, auto-switched conversion chain.
The Primary input is backed up with a Secondary input from a video server.
The 7160 Protection Switch can accept different types of signals on its two inputs. The 7160 auto-
senses and reports what type of signal it is receiving: HD SDI, SD SDI, ASI or SMPTE 310M.
Here, an HD SDI signal is fed to the Primary input while an SD SDI signal is fed to the Secondary input.
If the HD SDI signal is bad, and the 7160 switches to the SD SDI signal, SD SDI will be output.
The 7900 Up/Down/Cross Converter shown above accepts an SD SDI or HD SDI signal. The user
sets the 7900 to the desired output type. In this example, the 7900 is set to output HD 720p. If the
incoming signal is 720p, the signal simply passes to the output. If the incoming signal is 1080i, the
7900 cross-converts the signal and outputs 720p. If the incoming signal is SD SDI, the 7900 upconverts
the signal and outputs HD 720p.
Relay circuits accessible from the 15-pin D Control connector on the rear backplane can be connected
to alarms for monitoring Primary status and switch position.
Master
Control
7160
Protect Switch
HD SDI
Control
Alarm Outputs
Video
Server
(Backup)
SD SDI
Primary
Secondary
7900
Up/Down/
Cross
Converter
HD SDI
or
SD SDI
HD SDI
or
SD SDI
720p
To Transmitter