Novus ND2310D User manual

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
Page #:
1 of 38
www.novuspower.com
ND2310D
10 Channel Distribution Amplifier
Available Options:
•Ethernet Monitoring
•DC Input
•Square Wave
•PPS
•SNMP
•CAN Bus (for use with Novus redundant systems)
All information provided herein is the property of Novus Power Products LLC.
The information included may be reproduced without the permission of Novus
Power Products LLC for the purpose of operating the equipment.

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
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2 of 38
www.novuspower.com
Contents
Safety................................................................................................................................... 3
Mounting.............................................................................................................................. 4
Summary.............................................................................................................................. 5
Controls and Indicators –Front Panel................................................................................. 7
Channel Status ................................................................................................................. 8
Status LEDs ..................................................................................................................... 9
Input Status...................................................................................................................... 9
Power Supply Status...................................................................................................... 10
Amplitude Alert Threshold............................................................................................ 11
Input Threshold.............................................................................................................. 15
Input Select (when used with Novus select references) ................................................ 16
Latch Channel Values.................................................................................................... 18
Save Configuration ........................................................................................................ 18
Fault Status .................................................................................................................... 19
Power Switch................................................................................................................. 20
Distribution Amplifier Cabling - Synchronizing NR2310D-O/G and ND2310D ............ 20
Distribution Amplifier Cabling - Synchronizing Two NR2110D-O/G and ND2310D:... 22
RS232 DB9 Port ............................................................................................................ 23
Rear Panel.......................................................................................................................... 24
Channel Outputs –BNC or SMA.................................................................................. 24
Signal Input A/B............................................................................................................ 24
DC Input ........................................................................................................................ 25
AC Input ........................................................................................................................ 25
RS232 DB-9................................................................................................................... 25
CAN Connector (optional) ............................................................................................ 26
Functional Description ...................................................................................................... 28
Bandwidth...................................................................................................................... 29
Phase Noise.................................................................................................................... 29
Outputs........................................................................................................................... 30
Built-in Test................................................................................................................... 30
Power Supplies .............................................................................................................. 30
Programming Guide (RS232 Port: Front and Rear).......................................................... 31
RS232 Commands ......................................................................................................... 32
Status String ($GPNVS) Channel Measurements ......................................................... 34
SNMP Reference ........................................................................................................... 34
Specifications..................................................................................................................... 35
Technical Specifications................................................................................................ 35
Environmental and Mechanical..................................................................................... 36
LIMITED HARDWARE WARRANTY .......................................................................... 37

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
Page #:
3 of 38
www.novuspower.com
Safety
This product has been designed and manufactured to recognized safety
standards and rules. The product is a sophisticated electronic instrument that
should be installed and operated by highly trained professionals.
Installation of this equipment should comply with all local electrical codes.
Utilization of this equipment in a manner inconsistent with the operating
instructions can be dangerous.
DANGER
There are no user serviceable parts within the unit. Removal of the cover to
access interior parts will expose the user to dangerous voltages.
DANGER
The unit may be powered from more than one power source. Care must be taken
to be certain all power sources are removed before installation or during removal
of the equipment.
DANGER
The unit must be operated with a secure earth ground to the chassis. The
electrical path for earth ground is through the power connector. The power
switching device that controls power to the equipment must never interrupt the
chassis ground connection.
The equipment contains complex electronic components that can be damaged by
electrostatic discharge. Observe all recognized standards for the handling of
complex electronic devices to avoid high voltage discharge to the equipment. Be
certain the equipment chassis and operator are at equipotential before handling
the equipment.

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
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4 of 38
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Mounting
The equipment is meant to operate in a horizontal - top up configuration.
The equipment is meant to mounted into a 19 inch standard NEMA cabinet. The
unit occupies a single “1RU”. Mounting spaces above and below the equipment
may be used as required.
Please observe the operating temperature range for the equipment. If mounted
into a closed rack, be certain that the total heat load in the cabinet does not result
in an interior operating temperature that exceeds the equipment maximum rated
temperature.
If cooling must be used, care should be given to prevent cooling mechanical
vibration from the coupling into the equipment. Mechanical shock and vibration
may introduce noise into the electronic signals inside the equipment that may
degrade the performance of the equipment.
For applications where there is significant shock and vibration, Novus offers
equipment with interior mechanical design features to minimize the effects of
vibration and shock on the equipment performance.

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
Page #:
5 of 38
www.novuspower.com
Summary
The ND2310D is a ten channel wide-bandwidth distribution amplifier. While
primarily used for 10 MHz reference distribution, it has a functional bandwidth
from DC to 12 MHz but is filtered for the lowest phase noise at 10MHz. For
applications other than 10 MHz the unit must be factory configured.
The platform is also available for pulse distribution. PPS or 10 MHz Square wave
at either 3.3 or 5 Vdc levels. It has an internal sine to square wave converter if
the square wave option is selected. The pulse and sine versions are not
interchangeable.
The sine linear amplifiers are low phase noise design to preserve the integrity of
the reference signal. All outputs are transient, and fault protected. The unit is set
up with ten outputs and dual inputs A and B. Gain is factory set for 0 dB.

USERS MANUAL
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REVISION
C
DATE
071221
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www.novuspower.com
The amplifier can also be optionally redundantly powered. The redundancy
feature adds a second power supply which may be AC or DC. The dual input
design monitors the input signals and selects the active signal or the prioritized
signal. Each output channel is monitored against a defined set of thresholds. If a
fault is detected, monitoring will report the fault serially,
The unit features extensive reporting via the rear panel RS232 port - equipment
status, output voltage on each channel and redundancy status. By being able to
monitor the output voltage, the user can detect cabling issues that cause an
impedance change and replace cabling before it completely fails. Reporting is
also easily accessible via the front panel display.
SNMP v02 is also available for remote monitoring and control. Appendix D
details the capability and features.
Nominal power is global AC power, but a DC power option can be ordered that
acts as the back-up power supply. Nominally 24 Vdc, this port is used for power
when AC power fails. Switching between power sources is automatic and there is
no transient power outage at the equipment level. The primary power supply is
followed by low noise linear converter assemblies. DC power in the range of -
60Vdc to +60 Vdc can be accommodated in three unique ranges.

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
Page #:
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www.novuspower.com
Controls and Indicators –Front Panel
This section describes the functionality of the front panel controls and indicators.
Two buttons above the status LEDs provide navigation through the menus.
In general, the NEXT button advances through the menus to the next screen,
while the SELECT button chooses between the available values on a menu.
Menus that allow selectable adjustments are the Input Threshold, Alert
Threshold, and the Attenuation setting. To adjust these values from the front
panel, hold down both buttons for two seconds, until the value begins to flash.
To leave the menu with the new value, hold down both buttons until the value is
solid.
Screen Saver: After one hour, the OLED display will turn off, unless activated by
a fault condition, or by a user input, such as pressing the NEXT or SELECT
buttons.

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
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Channel Status
The channel status can be determined by reading the actual RMS value on the
output of each stage. This is compared to a threshold limit that is set by the user
as a percentage variation from a saved value. The default variation value is set at
±25% percent from the current state of the amplifier and is user-programmable in
5% increments from ±10% to ±60%.
For pulsed applications, the reported amplitude is the logic level one amplitude.
The range of acceptable channel amplitude can be narrowed around a
connected balanced line, so that a channel status below the alert threshold
indicates a shorted line, while a channel status above the alert threshold window
indicates a potential disconnected cable.
The threshold value at which a channel alert is triggered can be programmed on
the alert threshold screen or programmed via the RS232 port. Once set, the unit
would continue to monitor each channel and a deviation beyond the set limits
would be reported as a failure on the front panel and via RS232.
The channel status feature can quickly detect a cabling failure. Any change in
the load impedance will change the output voltage with respect to the divider
formed by the output impedance of the amplifier and the load impedance. Failing
cables and connectors can be detected early.
The current threshold limits are displayed in addition to the actual measured
value. These values reflect the percentage threshold defined in the alert
threshold settings. If the output value is too low to give a valid reading, the
display will read “LOW.”
The status is displayed on the front panel and is accessible over the RS232
serial bus via DB9. Channel statuses can be cycled into view or can remain on a
single channel. This feature can be accessed via the NEXT button, by advancing
to the channel status screen. To cycle through channels in sequence, press the
SELECT button.

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
Page #:
9 of 38
www.novuspower.com
Status LEDs
There are three status LEDs which provide a quick indication of valid unit
operation.
Alert LED: The alert LED will illuminate flashing red to indicate an input
failure or a power supply failure. The alert LED will not flash red if any
valid input signal is present.
Fault LED: One of the output channels has been faulted.
Oven: Not used - set to steady Green
Input Status
The status of either input (A or B) can be monitored from the input status screen.
The input values a displayed in Vrms. When an input is selected, an arrow
appears next to the value indicating that the source on that input is relayed to the
output channels.
If no input is present, or the input selection priority does not have an input value
which is above the input threshold, the alert LED flashes red, and the screen
indicates “Connect Source.” The error is also noted in the fifth field of the
$GPNVS string, with the following values:
0 = At least one valid input is available and is relayed to the channel
outputs.
1 = Input A is selected and is below the input threshold.
2 = Input B is selected and is below the input threshold.
For pulsed applications, the input signal can be 3.3 or 5 Volt CMOS. The input
impedance is 1000 Ohms.
For details on the status strings, see section 5.0 Programmer’s Guide.
When using a Novus frequency reference, there is a separate (optional) CAN bus
between the unit and the references. The CAN bus communicates to the

USERS MANUAL
ND2310D
REVISION
C
DATE
071221
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www.novuspower.com
distribution amplifier and the references, a complete status of the reference.
Information regarding internal BIT, lock, frequency error are all communicated to
make an A/B selection while in the Auto mode. In the manual mode, the
distribution amplifier will remain connected to the manually selected A or B
regardless of the source status.
Power Supply Status
The power supply status screen provides DC voltage values of the two available
power supply sources. The 90-250V AC input is internally connected to an
internal 24V AC-DC convertor which powers the internal supplies with 24V. This
is diode-connected with the external 24V DC input, which can be used in addition
to, or in place of, the AC input.
The values of both DC supplies are measured internally to validate connections.
The measured values of the AC/DC convertor and the DC input are reported in
the third and fourth fields of the second $GPNVS status string.
For details on the status strings, see section 5.0 Programmer’s Guide.
In addition to direct value measurements, each redundant system has a power
supply status byte which is reported in the third $GPNVS status string, in the
seventh and eighth fields respectively.
Any measurement of the power supply which results in an alert condition will be
reported in the power supply status byte.
0x80 = External AC not connected.
0x40 = External DC not connected.