1GHz Ultra Low Noise Reference Oscillator -130dBc/Hz @ 10kHz RCLN1000 for AD9910 AD9912 Units

Units Sold: 10

 

Ultra Low Noise Reference Oscillator RCLN1000

Reference Oscillator for DDS AD9910 DDS AD9912 Units

PCB Design Schematics Case and Software made by GRA & AFCH

 

 

$199.95$299.95

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1GHz Ultra Low Noise Reference Oscillator -130dBc/Hz @ 10kHz RCLN1000 for DDS AD9910 DDS9912 Units

 

Ultra Low Noise Reference Oscillator RCLN1000

Reference Oscillator for DDS AD9910 DDS AD9912 Units

PCB Design Schematics Case and Software made by GRA & AFCH

 

 

Ultra Low Noise Reference Oscillator

 

 

Listing includes:

 

  • Ultra Low Noise Reference Oscillator
  • Aluminum Case (optional, choose in selector)

 

 

Dear customers!
If you have ANY questions, PLEASE ASK us.

 

 

Short description:

 

The output signal quality of a DSS (Direct Digital Synthesizer) dependent upon the Signal quality of the reference clock that is driving the DDS

This is why it is very important to select a low noise 1GHz clock source for the AD9910 and AD9912 DDS RF Units

It is essential to use the Ultra Low Noise Reference Oscillator get better performance than the PLL’s built-in frequency multiplier

Important quality aspects of the clock source, such as phase noise (in dBc/Hz) and frequency stability (in PPM) are reflected in the DDS Units output

 

 

Overview:

 

Model RCLN1000 v2.0 is an ultra-low phase noise 1 GHz clock oscillator, temperature compensated with true sinewave output.
Low cost, low phase noise, high temperature stability and excellent noise immunity performance due to the thick aluminum housing.
This makes this device an excellent choice over competing offerings.

 

Features:

  • 1 GHz Fixed Frequency
  • Ultra-Low Phase Noise: -130 dBc/Hz @10 kHz
  • Excellent Spurious suppression: < -85 dBc
  • Output Power: +4 dBm
  • Supply Voltage: 7.5 VDC
  • Supply Current: 200 mA
  • Operating Temperature: 0°C to +70°C
  • Frequency Stability (0-70°С): ±2 ppm (±2 kHz)
  • Stability per degree: 0.06 ppm/°C (57 Hz/°C)
  • Case Material: Aluminum
  • Dimensions: 95х50х40 mm
  • Weight: 300 g
  • Power Connector: 5.5×2.1 mm (+ in center)
  • RF Connector: SMA

 

Applications:

  • Frequency Synthesizers (DDS)
  • Local Oscillator
  • Receivers
  • Wireless Communications
  • SATCOM
  • Optical Communications

 

 

Description:

 

The basis of this oscillator is a custom 200MHz VCXO (Voltage Controlled Crystal Oscillator) with low phase noise of -150 dBc @ 10kHz offset.
To stabilize the VCXO frequency over the entire operating temperature range, a TCXO is used with the application of feedback using PLL (Phase Locked Loop) technology.
To convert the stabilized frequency from 200 MHz to 1 GHz, a frequency multiplier by 5 is used.
And to suppress unwanted harmonics and subharmonics, a set of filters used.
They consisting of 2 sections of Helical Band Pass Filter (BPF), ceramic High Pass Filter (HPF) and Low Pass Filter (LPF) is used.
To amplify the output signal to the level of +4 dBm, a low-noise RF Monolithic Amplifier is installed between the BPF filters.

 

To reduce the mutual influence of internal blocks on each other, besides inter-block aluminum partitions, 4 separate power lines are used.
Each of these lines are stabilized by a low-dropout regulator (LDO) with low phase noise.

 

The block diagram of this generator is as follows:

 

 

A thick-walled monolithic aluminum casing, made by milling, is used to shield the generator board.
Such a casing design is excellently shields the device from external sources of interference.
It is also significantly reduces electromagnetic emissions originating from the generator components.

 

 

Hardware Features:

 

  • 1 GHz Fixed Frequency
  • Ultra-Low Phase Noise: -130 dBc/Hz @10 kHz
  • Excellent Spurious suppression: < -85 dBc
  • Output Power: +4 dBm
  • Supply Voltage: 7.5 VDC
  • Supply Current: 200 mA
  • Operating Temperature: 0°C to +70°C
  • Frequency Stability (0-70°С): ±2 ppm (±2 kHz)
  • Stability per degree: 0.06 ppm/°C (57 Hz/°C)
  • Case Material: Aluminum
  • Dimensions: 95х50х40 mm
  • Weight: 300 g
  • Power Connector: 5.5×2.1 mm (+ in center)
  • RF Connector: SMA

 

 

Phase Noise:

 

To calculate the theoretical phase noise at the generator output (NFout), the following expression should be used:

NFout = NF_VCXO + 20log(Fout/Fin) + NF_amp + NF_other, where:

NF_VCXO – phase noise of the VCXO = -150 dBc/Hz @ 10 kHz offset
Fout – output frequency of the RCLN1000 = 1000 MHz
Fin  – input frequency (from VCXO) = 200 MHz
NF_amp – phase noise of the RF amplifier = 3 dBc/Hz
NF_other – phase noise of other components = 2 dBc/Hz

 

That is, NFout = -150 + 20log(1000/200) + 3 + 2 ≈ -150 + 14 + 3 + 2 ≈ -131 dBc/Hz @ 10 kHz offset

 

Actual phase noise measurements were performed with the Anritsu MS2781B instrument, and it showed that the phase noise value is significantly below -118 dBc/Hz, which is the measurement limit for the MS2781B device.

 

 

 

These types of generators are most often used with a Direct Digital Synthesizer (DDS, for instance, such as AD9910, AD9912, AD9914).
It’s worth saying a few words about the importance of using a low-noise clock source instead of the built-in frequency multiplier on a PLL specifically for such synthesizers.
The output signal quality of a DSS is dependent upon the signal quality of the reference clock that is driving the DDS.
Important quality aspects of the clock source, such as phase noise (in dBc/Hz) and frequency stability (in PPM) and will be reflected in the DDS output.

 

 

DDS Output dependency of the Clock Source:

 

Below is an illustration explaining the dependency of the DDS output signal quality on the quality of the clock source:

 

 

Spectrograms:

 

The spectrogram of the RCLN1000 at a 10 MHz Span:

 

 

The spectrogram of the RCLN1000 at a 4 GHz Span:

 

 

Applications:

 

Telecommunications:

Low phase noise generators are very important for modern telecommunication systems.
They provide signal stability and accuracy under the conditions of transmitting large volumes of data.
In mobile networks and fiberoptic communication systems frequency control accuracy is needed to prevent interference and ensure high data transmission speeds.
Low phase noise allows for improved communication quality, especially in the high-frequency range, where interference can be particularly noticeable.

 

Radio Astronomy:

In radio astronomy low phase noise generators are used in radio telescopes to enhance the quality of observations.
This allows for improved accuracy of measurements and the quality of the obtained data.
They are also used in complex systems, such as interferometers, where signals from different antennas need to be precisely synchronized.

 

Radar:

In radar systems low phase noise generators allow for improved accuracy in determining the distance to objects.
The accuracy of frequency, as well as stability and low noise level, are important when locating objects.
Lower phase noise can lead to more accurate location and identification of objects, especially at long distances.

 

 

Ultra Low Noise Reference Oscillator by GRA & AFCH

 

 

 

Ultra Low Noise Reference Oscillator by GRA & AFCH:

 

 

 

 

 

Dear customers!
If you have ANY questions, PLEASE ASK us.

 

 

 

Shipping and Return information

 

All Items are shipped from Ukraine
Via International registered Airmail
Shipments are made within 1 business day
After the payments are received and verified
It takes about 4-7 days via UPS Express delivery
It takes about 10-18 days via Standard shipping
It takes about 35-45 days via Economy shipping
We combine multiple Items to save on shipping

 

 

 

UPS Express Shipping time (recommended):

Europe: 3-5 days
Germany: 3-5 days
USA, Canada: 4-7 days
Asia, South America: 5-7 days
Australia, New Zealand: 5-7 days
Africa, Central America: 5-7 days

 

 

Standard Shipping time:

Europe: 10-12 days
Germany: 10-12 days
USA, Canada: 10-15 days
Asia, South America: 10-18 days
Australia, New Zealand: 12-18 days
Africa, Central America: 12-18 days

 

 

Economy Shipping time:

Europe: 25-30 days
Germany: 25-30 days
USA, Canada: 30-35 days
Asia, South America: 35-45 days
Australia, New Zealand: 45-55 days
Africa, Central America: 45-55 days

 

 

Return Policy

All Returns are accepted

  • For Return you should contact Us within 14 Days after receiving the Item
  • Refunds are made as Money back or Replacements (buyer’s choice)
  • Return Shipments are paid by the buyer
  • No restocking fees are charged

 

 

Customs Policy

We as a seller do not receive from the buyer any charges any sales taxes and handling fees.
In any case we are not responsible for Tax(VAT) or any other Import duties or any other equivalent fees that arises upon delivery.
Please consult with your local Customs legislation and visit your local Customs department or website before making any purchases.

 

 

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