Manual

Model 5401A User Guide Issue 2, July 2021
Studio Technologies, Inc. Page 21
be connected to the Model 5401A by way of
a BNC jack that is located on the unit’s back
panel. Refer to Appendix E for a view of the
Sync Input menu.
Lock Status: This is a display-only field
that can show Unlocked, Locked followed
by one of the word clock rates, Locked fol-
lowed by one of the video rates, or Locked
(10 MHz). It’s also possible that it could
display Error which would indicate a Model
5401A hardware problem. This would be a
rare occurrence and, in this case, contact-
ing the factory would be recommended.
This field reflects the operation of the Model
5401A’s sync input circuitry. Unlocked will
display if no signal source is connected
or if the connected source doesn’t match
the selected sync input type. For example,
Unlocked will display if Word Clock has
been selected as the sync input type but
a video sync signal has been connected.
The detected rate will be displayed follow-
ing the term Locked whenever the sync
input is locked to the connected signal. If
this is a word clock signal then one of the
six compatible rates will be displayed: 44.1,
48, 88.2, 96, 176.4, or 192 kHz. If Locked
displays due to a video source being con-
nected then the actual rate/format charac-
teristics will also be displayed. If the sync
input is locked due to a 10 MHz signal being
recognized then Locked (10 MHz) will dis-
play. The compatible sync input sources are
listed in Appendix A of this guide.
Unlocked will be displayed, in the text color
red, if the sync input has been selected on
the Main menu as the Model 5401A’s clock
source but either no signal is connected to
the sync input or a non-compatible signal is
connected. A non-compatible signal would
include a sync input type being selected for
Word Clock and then a word clock signal
at a different rate than the current Dante
sample rate is connected. For example, an
incompatible situation would be where the
current Dante sample rate is 48 kHz but
the connected word clock signal is 96 kHz.
Probably the most common non-compatible
signal would be a situation where a video
reference signal is connected to the sync
input but the sync input type was left at the
default (Word Clock) rather than being se-
lected for Video.
Current Dante Sample Rate: This is a
display-only field that can show 44.1 kHz,
48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, or
192 kHz. It can also display Error in the
unlikely event that there is an issue with the
Brooklyn II module that provides the Model
5401A’s Dante interface.
This field displays the Model 5401A’s cur
-
rently selected sample rate as used by the
Model 5401A’s Dante transmitter (output)
channels. The Dante transmitter (output)
channels provide eight sine wave tone
labeled Tone 1 through Tone 8. Changes to
the Dante sample rate are made using the
Dante Controller software application.
Type: This is a configurable field with three
choices: Word Clock, Video, or 10 MHz.
If the Model 5401A’s clock source has been
selected to Sync Input on the Main menu
the type of connected source must be de-
fined to match the application. If Word Clock
is selected then a square wave source with
a rate of 44.1, 48, 88.2, 96, 176.4, or 192
kHz needs to be connected. For proper
operation the nominal unloaded level of the
word clock source must be 5 volts DC peak-
to-peak. Also, the connected word clock
source must match the displayed current
Dante sample rate. This is a bit of a “chick-
en or the egg” situation since it can be con-
fusing as to who is supposed to control the
sample rate and who is supposed to follow
the sample rate! The Dante Controller soft-
ware application should be used to select
the desired Model 5401A sample rate. This