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Comtest Store RFQ

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Microchip MHM 2020

sku Product SKU:  MIC-MHM-2020

Extreme Low Phase Noise and Frequency Stability for precise timekeeping and metrology applications.

Expanding upon the heritage of the world’s most widely installed active Hydrogen maser, the Microchip MHM-2020 has enhanced the unique Auto-Tune design of the MHM-2010 by re-engineering the electronics and software to attain even better stability.
Capable of achieving <3 × 10-16 daily drift rates along with improved environmental stability, the MHM-2020 has been designed for applications requiring extreme frequency stability and low phase noise.
Designed, manufactured and tested in the USA with an eye toward long service deployments, 95% of Masers built at Microchip’s dedicated Maser facility since 1999 are still in operation. Each MHM-2020 is manufactured to meet stringent quality standards and undergoes extensive performance verification testing, prior to deployment.

Auto-Tune with Drift Compensation

The MHM-2020 incorporates an automatic frequency control system to maintain the resonant cavity at a constant frequency relative to the hydrogen emission line. This technique enables the Maser to deliver long-term stability that is only attributed to the most stable cesium atomic standards.
Now, by pairing this technology with the new integrated Drift Compensation software, daily ageing rates of <3 × 10-16 can be consistently achieved with the MHM-2020.

Improved Environmental Sensitivity

The Maser is designed to withstand variable voltage, temperature and magnetic field environments. By carefully selecting electronics and controlling the manufacturing process, each MHM-2020 is designed to achieve a Temperature and Magnetic Field sensitivity of <8 × 10-15/ºC and <2 × 10-14/Gauss, respectively.

Outputs

The MHM-2020 provides multiple 5, 10, and 100 MHz outputs and 1PPS. Multiple configurations can be ordered to optimize for varied applications.

  • Low Phase Noise Output Option
    • The MHM-2020 can be factory configured with low phase noise outputs that enable higher resolution measurements in VLBI applications.

The low lifetime cost of ownership, maintenance-free operation

The lifetime cost of ownership for active masers is a critical consideration. The MHM-2020 is designed for long life and low maintenance. The hydrogen supply is adequate for over 20 years of operation. An efficient hydrogen state selector minimizes the load on ion pumps (< 0.01 mole per year), and the pumps themselves are designed for greater than 20 years of life at nominal hydrogen flux. The TeflonTM bulb coating virtually eliminates any re-coating requirement and has a demonstrated life of over 20 years. Should it be required, the MHM-2020 is designed for on-site module replacement.

Upgrade your existing Maser

We have ensured that the current industry-leading MHM-2010 Maser deployed in the field can be upgraded to the new MHM-2020 depending on the age of the unit. Contact your local Microsemi representative for details.

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AME-DC-ASA

Ametek Asterion DC ASA Series

sku Product SKU:  AME-ASTERION-DC-ASA-SERIES

The Sorensen™ Asterion® DC ASA Series is the newest addition to the Asterion platform of power testing solutions. The new ASA Series features three independent, isolated 600W channels for a combined 1800W total output power. The autoranging supplies feature expanded current and voltage range at the full output power level, enabling the ability to satisfy a wider testing need without requiring the purchase of additional models.

Control via Front Panel Touchscreen & Encoder Knob or available digital control interfaces

The Asterion DC ASA Series is Digital Signal Processor (DSP) controlled and can be operated from the intuitive, easy-to-use front panel touchscreen or the Ethernet LXI, USB and RS232 standard control interfaces, as well as through the optional GPIB control interface. The touchscreen function group icons include a Dashboard, Output Programming Parameters, Measurements, Sequencing, Configuration, Control Interfaces, Applications, and System Settings. Function selection and parameter entry can be achieved either by direct selection from the touchscreen or by using the encoder selector button. The control resolution is adjusted by a dynamic rate change algorithm that combine the benefits of precise control over small parameter changes with quick sweeps through the entire range.

Applications

The Asterion DC ASA Series is designed for testing today’s complex electronics, including telecommunications and commercial electronics requiring low profile, light weight power supplies with high power density. Other applications include:

  • Military and aerospace electronics test
  • DC power simulation
  • Commercial manufacturing and process control
  • Research and development
  • Automotive component and battery testing
  • ATE applications

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IMG-PSTE

Ametek Power Special Test Equipment (PSTE)

sku Product SKU:  AME-PSTE

The Elgar Power Special Test Equipment (PSTE) provides programmable DC power, and programmable loading, to the electrical systems of satellites for system functional testing.

There are several key benefits of the PSTE. First, it is a complete turnkey system that is capable of operating locally through a simple GUI interface or remotely via a host computer as a single Ethernet address. The spacecraft engineer who defines the spacecraft power bus limits, cabling scheme, mode simultaneity matrix, and system behavior based upon limit conditions implements the real intelligence of the system. From this definition, operating procedures can be generated to allow spacecraft technicians to operate the system, system protections are implemented that perform cable detection and mode verification, automated spacecraft fixture identification and related mode capability, and more.

Second, the PSTE is intended to negate the need for purchasing new power test equipment with each new spacecraft. With a review of current and future needs and industry trends, power resources can be sized to provide the optimal blend of flexibility and price.

The system also monitors and provides protection for the satellite electrical power systems against any damage by programming error or by system failure.

The following resources are available in the system pictured on the cover. In most cases, the hardware resources can be scaled to meet the customer's individual requirements.

AC Isolation transformers

  • 75KVA power rating; Transform 480VAC 3phase Delta to 208VAC 3 phase Wye


Main Power Rack

  • Five 10KW power channels; 150VDC at 67A each
  • One 5KW load channel; 3-450V, 0-150A constant current
  • Eight programmable strip chart recorder outputs


Solar Array Simulator

  • 64 Channels with 110V Voc and 450W each


Electronic Load Rack

  • Three 5KW load channel; 3-450V, 0-150A constant current


Remote User Interface

  • Ruggedized Portable PC with operator interface software


System Verification test Fixture

  • Customized for individual spacecraft I/O to allow convenient, manual verification of power setup.


Hardware Overview

In this section, the overall system is first represented by a simplified block diagram along with a general discussion of the function of each equipment rack. After which, each rack of equipment is represented by its own block diagram. Each rack block diagram is supported by a discussion of the equipment in the rack.

Either the Remote User Interface (RUI) or the Remote Operating System (ROS) is the source of control, or Computer in Charge (CIC), at any given time, at the operator's discretion. The ROS is supplied by the user. The CIC communicates directly with the system controller in the MPR (MPR controller), and the entire system is controlled via the MPR Controller.

Diagnostics and Troubleshooting can be accomplished directly from the MPR controller. The Main Power Rack (MPR) provides main bus power for tests from up to five internal power sources. The Solar Array Simulator (SAS) provides solar panel simulation power. The Spacecraft Protection Unit (SPU) further protects the spacecraft from damage in case of failure of the built-in OVP/OIP protection of the rest of the PSTE system. For electrical system loading tests, the Electronic Load Rack (ELR) provides three programmable Electronic Load Units (ELU). The MPR contains an ELU that can be used when only one ELU is required.

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