NetWave DirectView Broadcast Console Operations & Technical Manual
Revision A
5 – NetWave Servicing
Harris Broadcast
5-9
PR&E
Along with the various system bus signals, 48 volts are fed to the DSP boards via 50-conductor flex cables.
These tie the Monitor & Output card and the DSP cards together in series. The last DSP card (the DSP card
farthest from the Monitor & Output card) has a 100 Ω resistor pack plugged into RN1 to terminate these bus
signals.
The +48 volts are routed to each control panel using pins 4 and 5 of various chassis and Monitor and Output
board RJ-45 jacks. Pin 7 is the 48 volt return. A balanced clock is on pins 1 and 2. Pins 3 and 6 are the
bidirectional data lines. Pin 8 is used to sense that the panel is present.
Each card and panel has DC-to-DC converters to convert the +48 VDC into other DC voltages required by
the panels and cards. These include ±17 VDC for analog circuits, +5 VDC for digital circuits and +3.3 VDC
for FPGA circuits.
The Monitor Control panel uses a 12" red flat cable, plugging into J28 on the Monitor & Output card, for
power and signals. Each Dual Fader panel position has a red flat cable plugged into a labeled jack on a DSP
card. Each position in the frame has a red flat cable supplied with the frame.
Each DSP card handles signals from sixteen inputs. Channel control is done using the eight control strips, on
the four Dual Fader panels plugged into that DSP card.
The Monitor & Output card also has DSP to sum the various system buses and then create the physical
outputs from the console. The Monitor & Output card also serves as the network interface for the VistaMax
system by controlling the VistaMax Link connector. This Link is not active until one of the Link Activation kits
is installed. The 99-1425 Link Activation kit activates the Link. The 99-1426 Link Plus Activation kit both
activates the Link and adds support for up to six Telco channels in the console.
Monitor & Output Card Status
Two LEDs near the right end of the card indicate operational status:
●
Fail is off when the system is operating normally. If it is on, it indicates abnormal operation.
●
DSP CLK blinks with a “heartbeat rhythm” to indicate the on-board DSP is active and communicating
with the other DSP cards.
You can press the Reset button to reset the console if unexpected operation occurs. This reset is equivalent
to power cycling the console. When you press this button, all audio through the console is cut off as the
console restarts, and all channels are turned off.
The Link connector has two LEDs (green and yellow) to indicate a good connection to a Hub card facet on a
VistaMax or Envoy card frame. In addition, the Monitor Control panel label VistaMax Linked lights when a
crossover CAT-6 cable is properly connected to a Hub card.
DSP Card Status
There are two LEDs near the right end of each DSP card that indicate operational status:
●
DSP Active blinks with a “heartbeat rhythm” to indicate the DSP is active. The left-most DSP card’s LED
will flash twice as fast as the LEDs on the other DSP cards to indicate it is the master DSP card.
●
Fault is off when the system is operating normally. If this LED is on, it indicates abnormal operation on
that DSP card.
Service Setup Test Modes
The DSP card setup controls have three service modes available to help with service and maintenance of the
NetWave console:
●
Data Path Test – This mode allows one set of parameters to be assigned to all eight channels on a DSP
card. It is entered by pressing Option + Channel Down in any setup mode. If the Changes Pending
LED was blinking, the changes are stored before this mode is entered.
