ST-7565 Series: Easy Mount, Low Cost DC Tachometer Generators

The ST-7565 series DC Tachometer Generator uses a #10-32 threaded shaft that quickly attaches to a tapped #10-32 motor shaft. No shaft coupling or tachometer mounting kit is required. Two mounting holes, on 1.5" mounting centers, are used to mount the tachometer body. Other mounting configurations are available, including a PY type adapter that can be mounted to tachometer ready TENV motors.

Like all of Servo-Tek's DC Tachometer Generators, the ST-7565 is self-generating and requires only two wires to sense he analog voltage output. Using an overhung design with no bearings, the driving torque is low.

When the new Tachometer Generator is used in reversing applications, the bi-directional output is a maximum of 0.5% of the nominal voltage in both CW and CCW directions. Linearity is 0.1% maximum up to 4000 RPM and ripple is a maximum of 5% RMS of the DC output voltage.

While the ST-7565A-2 offers a standard voltage output of 7 volts/1000 RPM, other voltage outputs up to 24 volts/1000 RPM are available. Even though the innovative design of the ST-7565 series tachometer is cost effective, the ST-7565 series still offers the same high quality silver commutator used on all of Servo-Tek's DC Tachometers Generators.

The ST-7565 series DC tachometer Generator offers a simple low cost solution for measuring and controlling speed. For more information on Servo-Tek's DC Tachometer Generators, request Catalog RC700 in print or CD.

Keithley's award-winning Model 2910 RF Vector Signal Generator has been recognized for a number of industry innovations, such as its Software-Defined Radio (SDR) Architecture, patent-pending synthesizer technology, and unique power leveling circuitry. The Model 2910 uses a highly versatile software architecture to adapt to the quickly changing test requirements of the dynamic wireless market. It provides a flexible RF test platform that reduces test times with fast frequency tuning, amplitude settling, and waveform switching for half the cost of instruments with similar, or less, performance capabilities. The Model 2910 can internally generate virtually any signal with up to 40MHz of modulation bandwidth and signals greater than 400MHz modulation bandwidth using external I-Q inputs. The Model 2910's continuous tuning capability from 400MHz to 2.5GHz covers the key ISM bands used for wireless communications.

In addition, the Model 2910 has the most intuitive user interface on the market, making it simple for even the novice user to quickly and easily generate RF signals. With an unrivaled combination of high accuracy and repeatability, speed, flexibility, ease of use, and compact size, the Model 2910 V2.0 employs new approaches to RF test and measurement that enables users to get accurate measurement results quickly, reduce test times, and decrease costs.

Powerful New Modulation Capabilities

The Model 2910 V2.0 features two new modulation capability options. The first of these, the Model 2910-DIG, is a flexible digital modulation option that allows users to create an extensive range of signal modulations used in modern RF communication products. The Model 2910-DIG lets users create multiple permutations of all digital modulation signals including ASK, FSK, PSK, and QAM, each with user-selectable symbol rates, filter types, and data types. The Model 2910-DIG option is especially useful in research and development labs and in education for its ability to easily create a wide range of digital modulation signals.

The other new option is the Model 2910-GPS, a low-cost and flexible solution for GPS testing that is especially well suited for production test environments. The Model 2910-GPS option simulates the coded L1 signal of a GPS satellite with a variety of data types, including using an external user-file with up to 37,504 bits (12.5 minutes) of actual satellite data. Comparable solutions cost at least twice as much as the Model 2910 V2.0 with GPS option. Together with other common wireless standards, such as GSM, EDGE, W-CDMA, cdmaOne, and cdma2000, the Model 2910-GPS option expands the scope of the Model 2910's RF test and measurement capabilities to test mobile devices with integrated GPS functionality.

Improved Power Calibration Increases Accuracy

Keithley's Model 2910 V2.0 also features a new power calibration table that improves measurement accuracy by compensating for RF power losses in test fixture cables. The table stores power vs. frequency values of the cables obtained via a separate RF power meter. The Model 2910 then automatically adjusts the power, correcting for cable losses to an accuracy of +0.3dB. This reduces operator error when making manual measurements and eliminates the need to develop power correction programming scripts in the test executive for automated systems.

Calibrating the test fixture is simplified with a new SCPI (Standard Commands for Programmable Instruments) command feature that allows an external PC connected to a Model 2910 V2.0 to control a separate RF power meter, such as a handheld Keithley Model 3500 RF Power Meter, via a USB cable; the power meter is used to measure power at the RF cable connected to the device under test. Compensating for cable power loss is critical for production test environments to reduce measurement uncertainty, which helps to increase product quality and yields.

Increased Memory Supports Large Waveforms

Another enhancement to the Model 2910 V2.0 is its Arbitrary Waveform Generator (ARB) memory expansion to 100 Mega-samples, allowing very large waveforms or many smaller waveforms to be loaded into memory. The 100 Mega-sample ARB of the Model 2910-ARB option supports multiple signal waveforms to be resident in memory and enables switching between these waveforms in less than three milliseconds using a remote-control SCPI command over the instrument's GPIB, USB or LAN interfaces.

A new ARB Sequencing feature further speeds up waveform switching times to support instant transition times. Here, the waveform sampler moves from the last point of an ARB waveform to the first point of the next waveform in one clock cycle. The ARB waveforms can be played in any sequence, providing added flexibility for speeding up measurements. Such fast and flexible testing is especially useful for production test applications.

Whether switching between frequencies, amplitude levels, or waveforms, the Model 2910 V2.0 delivers measurement speeds that are two to twenty times faster than traditional instruments – delivering the fastest execution times for testing wireless devices and products.

Preserving Capital Investment

Keithley's Model 2910 V2.0 RF Vector Signal Generator is an extremely accurate and versatile test instrument. It is readily adaptable to new wireless standards, increasing productivity, reducing time to market, and protecting test equipment capital investment. Users can easily upgrade to new and emerging standards as they become available without expensive hardware upgrades or new equipment purchases. The Model 2910 is a flexible RF test platform with the performance needed for today and the flexibility for the test needs of future RF wireless technologies.

Existing owners of the Model 2910 can download the Model 2910 V2.0 firmware with standard enhancements from Keithley's Web site at no additional cost. Units can also be upgraded with the optional Model 2910-DIG or Model 2910-GPS, or both. These can all be done in the field, do not need to be returned to a Keithley Service Center, and require no hardware upgrade.

Price and availability: Units are now available with four weeks delivery. The base price for the Model 2910 V2.0 RF Vector Signal Generator is $13,400 USD. The ARB option is $3,150 USD, the flexible digital modulation option is $3,500 USD, and the GPS option is $2,500 USD. Firmware upgrade is free for existing owners of Model 2910 units.

For More Information. For more information on Keithley's Model 2910 V2.0 RF Vector Signal Generator or any of its RF test solutions, visit www.keithley.com/products/rfmicrowave or contact the company at:

Telephone:

800-688-9951
440-248-0400

FAX:

440-248-6168

E-mail:

publisher@keithley.com

Internet:

www.keithley.com

Address:

Keithley Instruments, Inc.

28775 Aurora Road

Cleveland, OH 44139-1891

About Keithley Instruments, Inc.
With more than 60 years of measurement expertise, Keithley Instruments has become a world leader in advanced electrical test instruments and systems from DC to RF (radio frequency). Our products solve emerging measurement needs in production testing, process monitoring, product development, and research. Our customers are scientists and engineers in the worldwide electronics industry involved with advanced materials research, semiconductor device development and fabrication, and the production of end products such as portable wireless devices. The value we provide them is a combination of precision measurement technology and a rich understanding of their applications to improve the quality of their products and reduce their cost of test.

Products and company names listed are trademarks or trade names of their respective companies.

FEATURES:

• LOW RIPPLE Tach Generator 1.5% Peak to Peak (with 72 HKz filter)
• 3 Volts per 1000 RPM Standard - Other Voltages Available
• .250 Diameter Stainless Steal Shaft
• Two Shaft Extensions .650 inch (CS-7561F-51C) and .875 inch (CS-7514F-51C)
• Standard Servo and Face Mount with .500 inch Pilot
• Special One Piece Anodized Housing
• Lead Wires and Rear Cover Included
• High Quality Ball Bearings
• Varnish Impregnated Armature for High Speed Reversing Aplications
• Linearity 0.1%
• Silver Commutator
• Avilable from Stock

• LOW RIPPLE Tach Generator 1.5% Peak to Peak (with 72 HKz filter)
• 3 Volts per 1000 RPM Standard - Other Voltages Available
• .250 Diameter Stainless Steal Shaft
• Two Shaft Extensions .650 inch (CS-7561F-51C) and .875 inch (CS-7514F-51C)
• Standard Servo and Face Mount with .500 inch Pilot
• Special One Piece Anodized Housing
• Lead Wires and Rear Cover Included
• High Quality Ball Bearings
• Varnish Impregnated Armature for High
• Speed Reversing Aplications
• Linearity 0.1%
• Silver Commutator
• Available from Stock

Click Here to Learn More About Electromate's Products

Click Here to View Our Product Line Card

Click Here to Contact Us

Toll Free Phone: (877) 737-8698

Toll Free Fax: (877) 737-8699

E-Mail: sales@electromate.com

Keithley Instruments, Inc. (NYSE:KEI), a world leader in advanced electrical test instruments and systems, today introduced its Model 6221 AC and DC Current Source and Model 6220 DC Current Source.

AC Current Source and Current Source Waveform Generator.

The Model 6221 is the only AC current source on the market. Until now, researchers and engineers have been forced to build their own AC current sources. The Model 6221 provides better accuracy, consistency, reliability, robustness, and cost effectiveness than "home-made" solutions. It is also the only commercially available current source waveform generator, which greatly simplifies creating and outputting complex waveforms. Pulse widths as short as five microseconds can be programmed, and the instrument supports pulsed I-V measurements.

The Need for Precision, Low Current Sourcing.

The models 6220/6221 Current Sources combine ease of use with exceptionally low current noise. Low current sourcing is critical to applications in test environments ranging from R&D to production, especially in the semiconductor, nanotechnology, and superconductor sectors. High sourcing accuracy and built-in control functions make the models 6220 and 6221 ideal for applications such as Hall measurements, resistance measurements using delta mode, pulsed measurements, and differential conductance measurements (an increasingly common measurement for characterizing semiconductor and nanotechnology materials).

Simple Programming.

Both current sources are fully programmable via the front panel controls or from an external controller via RS-232 or GPIB interfaces; the Model 6221 also features an Ethernet interface for remote control from anywhere there's an Ethernet connection. Both instruments can source DC currents from 100fA to 100mA; the Model 6221 can also source AC currents from 1pA to 100mA.

Define and Execute Current Ramps Easily.

Both the models 6220 and 6221 offer tools for defining current ramps and stepping through predefined sequences of up to 64,000 output values using a trigger or a timer. Both sources support linear, logarithmic, and custom sweeps. The Model 6221's combination of high source resolution and megahertz update rates makes it capable of producing high fidelity current signals that are indistinguishable from analog current ramps.

A Powerful Combination with Model 2182A Nanovoltmeter for Resistance Measurements.

Device testing and characterization for today's very small and power-efficient electronics requires sourcing low current levels with great precision. Lower stimulus currents produce lower—and harder to measure—voltages across the device. Combining the Model 6220 or Model 6221 with a Keithley Model 2182A Nanovoltmeter makes it possible to address both of these challenges.

When used with the Keithley Model 2182A Nanovoltmeter, both the Model 6220 and Model 6221 measure resistances from 10nohm to 1Gohm. Used in this way, the Model 6221 acts as a high performance alternative to AC resistance bridges and lock-in amplifiers for measuring resistances and coordinates pulsing and measurement with pulse widths as short as 50 microseconds. The combination measures differential conductance up to 10X faster and with lower noise than earlier solutions allow and can be used in delta mode, which improves resistance measurements up to 1000 times. Included control software simplifies setup and operation.

Major Features and Benefits.

Both the models 6220 and 6221 source 100fA to 100mA with 100fA resolution on the lowest DC current range and feature current noise as low as 80fA RMS. A reconfigurable triax output simplifies matching the application's guarding requirements. Instrument control software is available for both Macintosh and PC computers.

The Model 6221 sources AC currents from 1pA to 100mA, with 10MHz output update rate. The unit features built-in standard and arbitrary waveform generators with 1mHz to 100kHz frequency range.

Drop-in Replacement for Model 220 Current Source.

The instruments also feature an emulation mode for Keithley's earlier Model 220, which makes it easy to use a Model 6220 or Model 6221 in an existing application without rewriting any control code.

About Keithley.

With more than 50 years of measurement expertise, Keithley Instruments has become a world leader in advanced electrical test instruments and systems from DC to RF (radio frequency) geared to the specialized needs of electronics manufacturers for high performance production testing, process monitoring, product development, and research. By building upon their strength in electrical measurement solutions for research, Keithley has become a production test technology leader for the semiconductor, wireless, optoelectronics, and other precision electronics segments of the worldwide electronics industry. The value they provide to their customers is a combination of precision measurement technology and a rich understanding of their applications to improve the quality, throughput, and yield of their products.

Performance: The high-quality design of Comdel's XDC 1000 assures ultra reliability, while the small size fits easily into your system. What's more, with the XDC's flexible options and controls, you don't need to purchase a new power supply every time you make a change in your system. Current and voltage control capabilities are standard with each supply.

Applications: Comdel's XDC is the ideal supply for reactive PVD sputtering, DC Bias and hard-coating applications.

Features:

• Compact, lightweight, 3 1/2" rack-mount DC generator
• Accurate output control by voltage or current
• Self-limiting circuitry that eliminates short-circuit failures
• Low stored energy that reduces arc damage
• Front Panel, continuously variable control of output voltage and current
• Calculated MTBF: 30,000 hrs. minimum