NXU-2B Operations Manual
3-16
3.4.20
Input Level Boost +20db
The receive input level may optionally be boosted by +20db in order to accommodate low level
signal sources. Provisioning via the web interface allows selecting either “No Boost” or, “Boost
+20db” in the ‘RX Boost Mode’ field.
3.4.21
TX Delay
Additional delay may be provided to the transmit audio path. Via the web interface ‘TX Delay
(mS)’ field, the user may introduce up to5 seconds of delay, in specified in 1 mS increments.
Upon editing the field with numeric data, the NXU-2B will round to the nearest 100mS interval.
When additional delay is used, the PTT\ signal will be asserted prior to the delayed audio being
presented, allowing LMR trunking systems to be accessed without audio loss.
3.4.22
RX Delay
Additional delay may be provided to the receive audio path. Via the web interface ‘RX Delay
(mS)’ field, the user may introduce from 0 to 5 seconds of delay, specified in 1 mS increments.
Upon editing the field with numeric data, the NXU-2B will round to the nearest 100mS interval.
When additional delay is used, the received audio will be delayed before being sent to the
network.
3.4.23
VMR
Voice Modulation Recognition has been added to allow interfacing with radios which do not
provide a separate COR signal. VMR provides a more robust method of ‘COR Sensing’ than
VOX alone. VMR mode may be selected via the web interface ‘COR Sense’ field pulldown
menu. When VMR mode is chosen, the hardware COR signal is ignored, and audio content with
the appropriate speech characteristics is allowed to simulate the COR signal.
3.4.24
VOX and VMR Sensitivity Adjustments
When either VOX or VMR COR sensing is selected, three levels of sensitivity adjustments are
provided to allow greater flexibility. Via the web interface, “Low” sensitivity requires more
signal content to recognize and simulate COR activity. “High” sensitivity requires less signal
content to recognize and simulate COR activity. The default sensitivity is “Medium”.
3.4.25
Restoring Factory Defaults
The NXU-2B allows the user to restore the original factory default operating conditions. This
may be useful if the unit has been incorrectly configured, and it is necessary to return to a well-
defined state. To restore the factory default conditions, the power to the unit needs to be removed
and restored while rear panel switch “RESET TO DEFAULTS” is depressed. When the front
panel LEDs begin blinking, the switch may be released, and the unit will be operational using
the JPS factory default parameters. The IP address will return to “
192.168.1.200
”, which will
allow web configuration. All other previously assigned user parameters will be lost during this
process.
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