EMR User's Guide
High Density Modular Audio Router (AES, Analog, MADI, TimeCode, Data)
Page 138
Revision 1.8
TROUBLESHOOTING
Using the information from this, check that all expected signals are present and no errors have
accumulated. If errors have accumulated then this is an indication of a bad connection to the rear plate, a
bad wire, or excessive cable length. Also verify that the source indicated by the card matches the
connections defined in Magnum.
8.2.
REFERENCES
The EMR system requires that all sources are locked to a common reference. Not doing so can result in
undesired distortion or ‘pop’s in the resulting audio. The following sections describe how to validate the
reference for the system.
8.2.1. Verifying Reference to the EMR Modules
All of the EMR AES and analog input and output modules require a common reference. This reference is
supplied through the frame. Each card has an LED that provides an indication of whether a reference is
present. The behavior and location of the LEDs are described in section
If the reference LED does not behave as expected, check the frame to ensure that the correct reference is
being used. The EMR modules can be configured using VistaLINK Pro to use one of two references
supplied by the frame.
Also, using VistaLINK
®
, check the Frame Ref Error Count for each module to ensure that it is not
accumulating. After a system has been setup and is in steady state, this counter should be reset so that it
is zero. If the reference signal is clean then this count should not increase any further.
8.2.2. Verifying Reference to the EMR-OP16-MADI
The EMR-OP16-MADI is the only MADI module that requires a reference to function correctly. This
reference is supplied through the frame. A set of LEDs on the front provide an indication of whether a
reference is present or not. The behavior and location of the LEDs are described in section
8.2.3. Verifying Reference to the EQX De-Embedder and Embedder Modules
The EQX-IP16AD-H (-3G)-2TDM and EQX-OP16AE-H (-3G)-2TDM use the reference provided by the
EQX frame. Please consult the EQX manual to ensure that the router is configured correctly to use the
reference provided.
On each of the EQX-IP16AD-H (-3G)-2TDM and EQX-OP16AE-H (-3G)-2TDM modules, dip switch 4 must
be set to either 59.94Hz (CLOSED or down) or 50Hz (OPEN or up). This frequency corresponds to the
frequency of the reference. When this is set correctly, status LED C on the respective module should
flash green. If the reference is not present or if the dip switch is not configured correctly then the LED will
be solid red.
8.3.
SIGNALS
8.3.1. Verifying Input Signals to EMR Modules
The EMR AES and analog input modules provide various methods for verifying input signal presence.
AES or analog inputs to the EMR can be monitored using one of three available options: the video output,
the front card edge LEDs, and VistaLINK PRO. Using one of these methods will enable quick validation of
the hardware, rear plate connection, wiring, and patch panel (if applicable) of the input path.
