Low-cost, high-performance clock ADEV (Allan Deviation) stability analyzer
It features a cutting-edge 1ps resolution to compare and measure the phase and frequency stability of a clock, such as a Rubidium, against an external GPS/GNSS reference standard. It’s ideally designed for crystal, rubidium and cesium clock characterization, clock short term stability and ADEV measurements, and clock calibration applications.
- Clock ADEV stability measurement & analysis systems
- Clock calibration systems
The system is designed to make a direct frequency measurement in comparison with an external 10 MHz frequency reference. PicoTime-1U is based on a heterodyne system using direct digital synthesizer (DDS) technology to allow measurements in the range of up to 30 MHz. The external 10MHz reference divided by 2×107 is used to make time interval measurement each second.
Direct frequency measurement is used for programming DDS. The DDS divides the device frequency around 1KHz by using two mixers. As indicated in the block diagram, the whole system is based on a heterodyne architecture with a double frequency conversion.
Three outputs are available:
- 1KHz where a crystal filter based PLL is used to restrict the bandwidth to only 1Hz
- 1KHz with about several 100KHz bandwidth.
- 1PPS reference
The system is controlled with the PC COM interface. When connecting an external counter, other types of
measurements can be performed.
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- Easy to use
- Small volume
- High resolution
- COM standard interface
- Automatic operation
- Low noise performance
- External counter compatible
- User friendly software
- Clock DUT input 1-30 MHz
- Reference Input 10 MHz from GPS/GNSS
- Tempco (phase time) < 20ps⁄C
- Temp 15 to 30C
- Power (operating) < 10w after warm-up
- Voltage > 85-264 VAC
- Size (WxHxL) 445x300x44mm (1U) | 17.51×11.81×1.73″
- Weight 3.5 Kg | 123.4 lbs