Studio Technologies 5150 V.1 - Manual (Page 8)

Issue 5, March 2014 Model 5150 User Guide
Page 8 Studio Technologies, Inc.
Model 5150
Video Generator Module
From then on whenever an SDI input sig-
nal is not present the internal generator will
output the stored image at “1080i/59.94.”
Changing the format and rate of the gen-
erator only requires connection of an SDI
signal with the desired characteristics.
(A minimum required connection time
helps to ensure that an accidental format/
rate change won’t occur.) However, there
may be situations where maintaining the
format and rate of the internally-generated
signal is important. To support this condi-
tion one configuration choice allows the
automatic format/rate selection function
to be disabled.
Video Generation with External
Reference
Some applications may benefit from the
Model 5150 serving as a full-time stand
alone video generator. A configuration
choice helps to support such applications
by using the selected SDI input only as
a timing reference. Unlike typical opera-
tion, when selecting this operating mode a
signal connected to the selected SDI input
would not pass through to the SDI. Its rate,
format, and specific timing characteristics
would be used as a reference for the in-
ternally-generated video output. Note that
bi-level or tri-level analog timing reference
signals are not supported. Only a HD-SDI
or 3G-SDI signal can serve as a reference
signal for the Model 5150.
GPI and GPO
Model 5150 modules with serial numbers
00251 and later offer a general-purpose
input (GPI) and a general-purpose out-
put (GPO) function. The GPI allows the
connection of a switch or relay contact to
control the on/off status of a Model 5150
function. As of the date of this User Guide,
no GPI operating function has been imple-
mented in the module’s firmware (em-
bedded software). Future versions of the
firmware may implement a GPI-controlled
action.
The GPO function provides an indication
of the status of the selected SDI input. It’s
intended that the GPO will be connected to
an LED indicator. A configuration choice se-
lects whether the GPO is active (+3.3 volts)
when the selected SDI input is valid or ac-
tive when the selected SDI input is invalid.
(This can also be described as active “high”
or active “low”). This allows, for example, a
green LED to light whenever a valid signal
is connected to the selected SDI input,
thus providing an “input good” indication.
Alternately, a red LED could light when the
selected SDI input is not active, providing
an “input fail” indication.
Installation
Integration of the Model 5150 into a select-
ed application should prove quite simple,
only connecting SDI input and output sig-
nals as well as DC power is required. Some
applications will also require connection
to the module’s data bus, GPI, and GPO
functions. The coaxial (BNC) input and out-
put connections are compatible with most
HD-SDI and 3G-SDI signals. If the specific
Model 5150 being installed also includes
optical support one or two single-mode fiber
interconnections will be made. The fiber
connections utilize miniature LC plugs.
The DC power source is nominal 12 volts
with an acceptable range of 10 to 18 volts.
It’s possible that the module will be part of
a local RS-485 data bus that’s associated
with a Studio Technologies’ Model 5190 Re-
mote Access Module. If so, two additional