Novus NS2310D-R User manual

USERS MANUAL
ND2310D
REVISION
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DATE
1/12/20
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ND2310D
10 Channel Distribution Amplifier w/SNMP
All information provide 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
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DATE
1/12/20
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Contents
1.0 Summary ........................................................................................................3
2.0 Controls and Indicators –Front Panel.............................................................5
2.1 Channel Status............................................................................................6
2.2 Status LEDs ................................................................................................7
2.3 Input Status.................................................................................................7
2.4 Power Supply Status...................................................................................8
2.6 Alert Threshold............................................................................................9
2.7 Input Threshold .........................................................................................13
2.8 Input Select ...............................................................................................14
2.9 Latch Channel Values...............................................................................15
2.9 Save Configuration....................................................................................15
2.10 Fault Status.............................................................................................16
2.11 Power Switch...........................................................................................17
2.12 RS232 DB9 Port......................................................................................18
3.0 Rear Panel....................................................................................................19
3.1 Channel Outputs - BNC.............................................................................19
3.2 Status LEDs ..............................................................................................19
3.3 Signal Input A/B.........................................................................................20
3.4 24VDC Input..............................................................................................20
3.5 AC Input ....................................................................................................21
3.6 RS232 DB9 ...............................................................................................21
4.0 Functional Description ..................................................................................22
4.1 Bandwidth..................................................................................................23
4.2 Phase Noise..............................................................................................23
4.3 Outputs......................................................................................................24
4.4 Built in Test................................................................................................24
4.5 Power Supplies .........................................................................................24
5.0 Programming Guide (RS232 Port: Front and Rear)......................................25
5.1 RS232 Commands....................................................................................27
5.2 Status String ($GPNVS,1) Channel Measurements..................................30
5.3 Status String ($GPNVS,2) Power Supply Measurements .........................31
5.4 Status String ($GPNVS,3) Status Bytes....................................................32
5.5 Status Byte Key.........................................................................................33
5.6 Calibration Factors....................................................................................36
6.0 Technical Specification.................................................................................37
6.1 Technical specifications ............................................................................37
6.2 Environmental and Mechanical .................................................................37
7.0 LIMITED HARDWARE WARRANTY ............................................................38

USERS MANUAL
ND2310D
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DATE
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1.0 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
10MHz signal.
The amplifier is a 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.

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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 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.

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2.0 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 1 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.

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2.1 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%.
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.

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2.2 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.
Oven LED (OCXO option only): The oven LED will illuminate red to
indicate an oven failure.
Fault LED: The fault LED will illuminate flashing red to indicate a channel
fault, when any single channel is outside the user-defined threshold.
2.3 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 details on the status strings, see section 5.0 Programmer’s Guide.

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2.4 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.

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Redundant power supplies operate on either the AC input or DC input,
and function independently. All functionality and reporting for an individual
power supply and amplifier is independent of its redundant copy.
2.6 Alert Threshold
The alert threshold screen allows the user to adjust the tolerance from the
reference voltage which, if exceeded in either direction, the output
channels will report a fault status. The default threshold value is set at
±25% percent from the current state of the amplifier, and is user-
programmable in 5% increments, from ±10% to ±60%.

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DATE
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Each channel has a reference voltage which can be set, all at once, by
latching the channel’s current value in the latch channel average screen.
Each channel’s reference voltage can be set individually by writing the
value serially with the $SET command. After saving the current
configuration on a channel, any subsequent deviation on that channel
which exceeds the alert threshold percentage will trigger an alert.
Steps to ensure correct alert configuration:
1. Connect source input(s) to channel A and/or B.
2. Connect distribution cabling to channels 1 through 16.
3. Set alert threshold to desired range.
4. Save current channel voltages with the latch channel values
screen.
5. Save current settings on the save configuration screen.
Note: Alert threshold can be different for Input A and Input B, allowing for
variation in the input source. To accommodate both inputs, set alert
threshold for Input A and Input B.