ULTRIX-MODX-IO User Guide (v1.0) Configuration • 41
Gearbox Overview
A Gearbox is a group of four consecutive inputs or four consecutive outputs that are automatically
grouped together in the routing database. The first port of the Gearbox group is automatically used
for routing and Ultriscape, while the remaining three ports in the group are reserved but not used
(they are not listed in the routing system database).
Keep the following in mind when configuring a Gearbox group on the ULTRIX-MODX-IO blade:
• Signal Medic — a function that attempts to ‘repair’ the incoming Gearbox signal group if one of
the four input stream is temporarily interrupted. The Signal Medic will replace the missing stream
with an interpolated version derived from the other incoming signals.
• Gearbox Timing — the Gearbox requires all four of the input signals be within 350ns of each
other. Cable lengths to the Gearbox input should be as matched as practicable.
For More Information on...
• cabling a Gearbox group on the ULTRIX-MOD-SFP, refer to “ULTRIX-MOD-SFP”.
• configuring a Gearbox, refer to the user guide for your router.
Gain (dB) # Provides a +/- 20dB gain range in 0.50dB
increments. If you have added a gain to an input
channel, the gain value specified for the output
channel is an addition.
For example, if you set the gain for an input to 10dB,
then specify a gain of 2dB on the output, the total
gain will be 12dB on the final output
Invert Selected Inverts the polarity of the audio signal for the
selected channel
Cleared Disables this feature
Sum Selected Sum two adjacent audio channels. Each selected
channel will carry the average of the two input
channels ((A+B)/2).
Select the Sum box for the first channel. The Sum
box for the second channel is automatically
selected.
When the input is summed, the original signals are
no longer available for output.
Cleared Disables this feature
Audio Delay
(ms)
# Applies up to 500ms of delay per channel. Note that
an UltriSync license must be enabled to the port.
Tone Mode Enable Enable test tones for the specified channel
Disable Disables this feature
Tone Freq # Specifies the type of test tone to embed in the
output
Table 4 Port Configuration — Views > Channels
Item Parameters Description
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