Tektronix FASTrack

    Tektronix T Carrier Trigger

Acterna and Anritsu DR-15 Batteries

used in

• Acterna 2310
• Anritsu S331A
• Anritsu S331B
• Anritsu S331C
• Anritsu S331D
• and many more

We have struck a special deal with the manufacturer. We have bought so many to keep our inventory running that we were offered a substantial discount. We are passing the savings along to our customers. These are brand new batteries. Restore your unit back to a longer battery life. Replaces DR-15, DR15 and DR-15S. Voltage is 10.8 volts. Nickel metal hydride construction. Current capacity is 2100 mAh. Why pay more? Other batteries may be available please email or call.

100 kHz to 3 Ghz for isotropic measurement of electrical fields

The Acterna/WG EMR-20  provides precise measurement of electrical field strength, making it ideal for safety monitoring in areas where high levels of radiation are likely and for EMC applications.

• true triaxial measurement
• optical interface for automated calibration and transfer of measured data
• high measurement accuracy due to automatic offset adjustment even during field exposure
• very easy to use
• shockproof, dust proof, and splash proof
• built-in stand and tripod bush

• Service work on transmitting equipment
• Working with plastic welding machines
• Operating diathermy equipment and other medical instruments producing short-wave radiation
• Drying equipment in the tanning and timber industries
• Field strength measurements in TEM cells and absorber chambers

Adtech/Spirent SX/13A Satellite Datalink Simulator

Rent me for $1500 a month

Reliable testing up to 51.84 megabits per second

   The Spirent SX Data Link Simulators create the same delay and error characteristics caused by long distance terrestrial and satellite data links. By providing very realistic simulations of actual network conditions, they allow engineers to stress test new equipment and network applications under repeatable and controllable conditions. Utilizing dual-channel, full-duplex operation, these simulators provide bi-directional testing with programmable delays, random bit errors and burst errors. Multiple delay and error events can be programmed into complex sequences to simulate a wide variety of chronic and periodic conditions or events such as peak traffic times and equipment overloads.

   Typical simulator applications include testing the operation, performance and reliability of multiplexers, bridges, encrypters, network applications and other communications hardware and software. When used for link simulation, these simulators physically connect directly between two pieces of equipment to replace conventional data links such as satellite connections, WANs or telephone networks. They can also be used in line with a real data link to add additional delays or errors or to simulate the effects of adding an additional link to the system.

Full-Duplex Operation

   Each simulator has two separate channels to simulate the bi-directional characteristics of a full-duplex data link. Each channel operates independently and has both transmit and receive functions. The SX/13a and models also permit different delay and error settings for each direction of the full-duplex data stream. Bypass and loopback modes can be selected whenever standard bi-directional flow is not required.

Delay Generator

   Each channel uses a variable length first-in-first-out delay buffer with user-selectable delay and data rate parameters. These parameters set the length of this buffer which in turn determines the amount of time it takes data to pass through each channel. The maximum delay length depends on the data rate (lower data rates permit longer maximum delays). At the lower rates, delays up to 9,999 ms (just under 10 seconds) are possible. Delays can be specified in milliseconds or bits depending on the measurement requirements of the test.

Error Generation

   Each channel has a and a The Random Error Generator simulates background errors caused by Gaussian noise and is active during gaps between error bursts. Random error rates can be from 1 x 10-12 to 1 error per bit for the SX/13A . The Random Error Generator normally injects logical errors. However, the SX/13A models can also be set to inject BPVs (Bipolar Violations) when bipolar interfaces such as DS1 are used.

Advantest/Anton Bauer Lifesaver Dual Propack Battery Charger

Rent me for $100 a month

 

The Q2 eliminates quick charging stresses by employing three independent charge termination systems. The Q2 Microprocessor initiates an evaluation procedure which identifies safety violations before beginning the quick charge cycle.

• Universal 115/230V unit (manual switch).
• Sequential Charging:
  ProPac/Magnum: 5-7 hours
  TrimPac/Compac: 3-5 hours
• Weight: 3lbs. 12 Oz.
• Charges one battery at a time.
   

Agilent 16195B 7MM Calibration Kit

  Rent me for $150 a month

A precision 7 mm calibration kit designed for the Agilent 4287A LCR Meter. Can work in other applications.

Consists of

• E4991-60021 Short
• E4491-60022 Open
• 04287-60021 6 Ghz 7 mm termination
• 04287-60022 Low Loss Capacitor

Agilent 44478B Dual 1x4 RF Multiplexer Module 1.3GHz 75 Ohm

The Agilent 44478B Multiplexer Module is an ideal choice for broadband switching of high frequency or fast pulse signals. Dual 1-to-4 multiplexers provide bi-directional switching of signals from DC to 1.3GHz. High channel isolation (>55 dB at 1 GHz) assures quality dynamic-range measurements using spectrum, network, or distortion analyzers. Each 1-to-4 multiplexer consists of seven relays in a "tree" structure, which provides high isolation and low VSWR (voltage standing wave ratio). All the connectors on the module's edge are female BNC for ease of wiring. Off-channels can be terminated in resistors to maintain proper operation of DUT circuitry. Simply plug a 50/75 Ohm SMB type resistive termination onto the on-board male SMB connector provided for each channel.

Features

Agilent 8496G 110 dB Programmable Attenuator

Rent me for $150 a month

with option 003

• APC-7 Input Connector

  The Agilent 8495G dc to 4 GHz programmable step attenuator offers exceptional repeatability and reliability. Attenuation is provided in 10 dB steps from 0 to 110 dB. Precision gold-plated leaf springs ensure long life (over 5 million cycles) and very high attenuator repeatability (typically 0.01 dB). To improve measurement accuracy, NIST traceable data (SWR and attenuation) is available as Option 890. A maximum switching time of 20 ms (including contact settling) speeds automatic testing. Custom step attenuator/switch combinations are possible. The Agilent 11716A/B/C interconnect kits provide quick connection of Agilent 8494/5/6/7 1 dB and 10 dB step attenuators in series for greater dynamic range with 1 dB steps.

Features

• Frequency range: dc to 4 GHz
• Attenuation range: 0 to 110 dB, 10 dB steps
• Insertion loss at 0 dB: 0.6 dB + 0.09 dB/GHz
• Maximum SWR: 1.5
• Repeatability life: 0.03 dB maximum, 5 million cycles per section
• Maximum RF input power: 1 W (average), 100 W (peak)
• Connector type: choice of type-N female, SMA female, APC-7
• Programming connector: 12-pin Viking, optional 14-pin DIP

Repeatability

   Fixed attenuators are often used as standards of reference in microwave measurements. Therefore, the accuracy of the measurement depends not only on the reference accuracy but on the repeatability of the insertion processes. Typical production test situations might require hundreds of connects/disconnects per day. So, measurement repeatability depends strongly on the connectors used. Agilent attenuators use precision type-N and APC-7 connectors, with repeatability that exceeds the International Electrotechnical Commission (IEC) standard for 7-mm connectors. For higher frequencies, Agilent uses 3.5-mm connectors that are fully SMA compatible, but are more rugged and repeatable than SMA. For applications to 50 GHz, Agilent uses 2.4-mm connectors that also have larger mating surfaces for rugged and repeatable connections. Design verification testing of 3.5-mm connectors showed virtually no test deterioration even after 1000 connections. For step attenuators, the repeatability of the internal RF connections is also of concern. Agilent uses an ?edgeline? transmission line structure in which the outer conductor is a continuous ground plane and only the center conductor is switched to insert or remove an attenuation step. Keys to achieving long-term repeatability include precision control of all dimensions that affect contact pressure, careful selection and control of plating processes, and careful monitoring and control of the assembly process. The result is a step attenuator with repeatability specified at 0.03 dB maximum over 5 million cycles per section.

Agilent 85097A RF Electronic Calibration (ECal) PC Interface Kit

Agilent 85097A PC Interface Kit provides the accessories that are needed to control the Agilent 8506xB and 8509xA/B ECal modules. The PC Interface Kit contains a PC Interface Unit, power supply, parallel cables and ECal software. The PC Interface Unit is connected to a PC running Windows?95 or NT? 4.0 (or higher) via a parallel cable. It is also connected to the ECal module(s) via another parallel cable.

The power supply connected to the PC Interface Unit provides the power needed for the RF or Microwave ECal modules.

The software is supplied on two 3.5 inch diskettes and will run on any PC (486 or higher) with Windows?95 or NT?4.0 operating system.

Features

• Electronic calibration made easy with Windows? based interface
• Small and light package
• Line Voltage: 100 to 240
• Voltage Line Frequency: 50 to 60 Hz
• Power Dissipation: 192 VA Maximum
• Windows®95 and Windows NT® are U.S. registered trademarks of Microsoft Corporation

Agilent/HP 11582A 18 GHz Attenuator Set

Rent me for $100 a month

Features

• Multiple dB attenuators included in one set
• Type-N connectors
• Walnut accessory case
• Maximum frequency: 18 GHz

 

Agilent/HP 11636B 26.5 GHz Power Divider

Rent me for $100 a month

Features

>

• Frequency range: dc to 26.5 GHz
• Maximum SWR: 1.29
• Insertion loss: 7.5 dB
• Maximum amplitude tracking: 0.25 dB at 18 GHz
• Maximum phase tracking: 2 deg typical

 

Agilent/HP 11904A 40 GHz 2.4 mm (m) to 2.92 mm (m) Test Port Adapter

Rent me for $100 a month

Type

• Connector Type: 2.4 mm male, 2.92 mm male

Superior RF Performance

• Return Loss: > 24 dB
• Repeatability: -40 dB

Features

• Electrical Length: 11.3 mm (0.45 in)
• Overall Length: 16.4 mm (0.64 in)
• Diameter: 9.0 mm (0.35 in)

Agilent/HP 11970A 26.5 to 40 Ghz Harmonic Mixer

The Agilent 11970A waveguide mixer is a general-purpose harmonic mixer employing a dual-diode design to achieve flat frequency response and low conversion loss. These are achieved without external dc bias or tuning stubs. Manual operation and computer-controlled hardware operation are simplified because mixer bias and tuning adjustment are not required.

The 11970A extends the frequency range of the Agilent E4440A/46A/48A PSA Series high-performance spectrum analyzers, the Agilent E4407B ESA-E Series portable spectrum analyzer, the Agilent 8560 E/EC-Series portable spectrum analyzers, the Agilent 8566B spectrum analyzer (used with the Agilent 11975A amplifier), and the Agilent 70000 modular measurement system (used with the Agilent 70907A/B external mixer interface modules).

Features

• Flat frequency response
• Low conversion loss
• No bias or tuning adjustments
• 100 mW safe input level

Agilent/HP 11970Q 33 to 50 Ghz Harmonic Mixer

The Agilent 11970Q wave guide mixer is a general-purpose harmonic mixer employing a dual-diode design to achieve flat frequency response and low conversion loss. These are achieved without external dc bias or tuning stubs. Manual operation and computer-controlled hardware operation are simplified because mixer bias and tuning adjustment are not required.

The 11970Q extends the frequency range of the Agilent E4407B ESA-E series portable spectrum analyzer, the Agilent 8560 E-series portable spectrum analyzers, the Agilent 8566B spectrum analyzer (used with the Agilent 11975A amplifier), and the Agilent 70000 modular measurement system (used with the Agilent 70907A/B external mixer interface modules).

Features

• Flat frequency response
• Low conversion loss
• No bias or tuning adjustments
• 100 mW safe input level

Agilent/HP 11975A 2-8 GHz Microwave Power Amplifier

Rent me for $500 a month

Agilent/HP 35650 Extension Mainframe

Mainframe for 3565S Multichannel Measurement System. Provides power and cooling for 8 slots. The 35650 mainframe cannot be connected to additional mainframes. Consists of a power supply, system bus interface and the card cage. No measurement modules on the mainframe. External measurement modules are required. Used primarily for multichannel vibration measurements.

Agilent/HP 35677A S-Parameter Test Set

Rent me for $100 a month

The 35677A S-Parameter Test Set contains the hardware required to make transmission and reflection measurements in both the forward and reverse directions. It is designed to operate with the Agilent/HP 3577x series Network Analyzers. The only setup required is to connect the device under test to the two measurements ports. The unit is used for 50 ohm systems. Frequency range is 100kHz to 200MHz.

Agilent/HP 415E SWR Meter

Rent me for $150 a month

   The 415E SWR Meter is a low noise, 1000Hz tuned amplifier and voltmeter, calibrated in dB and SWR. Designed for use with square law detectors, SWR attenuation and gain measurements are made easily and read directly from metered scales. Can also be used as a tuned amplifier for driving an X-Y recorder when making RF substitution measurements. The 415E has two outputs located on the rear-panel: a recorder output with 0 to 1 VDC into an open circuit and an AC amplifier output of 0 to 0.3 V rms (NORMAL mode), 0 to 0.8 V rms (EXPAND mode). The 415E has an internal precision 60 dB attenuator allowing it to operate over a 70 dB range in 2 or 10 dB steps. The sensitivity is 0.15 µV rms for full scale deflection at maximum bandwidth (1 µV rms on high impedance crystal input). The bandwidth is continuously adjustable from 15Hz for maximum sensitivity to 130Hz.

Agilent/HP 5006A Signature Analyzer

Rent me for $100 a month

   The 5006A employs patented signature analysis technique to generate a compressed, four-digit signature of a digital data stream at a logic node. Any fault associated with a device connected to the node will force a change in the data stream, and produce an erroneous signature. Simply probe the circuit, read the display, and compare to the known-good signature. Reference signatures can be generated by probing an operational circuit, or by external stimulation.

   Qualified signature Fault isolation in complex products can be done by windowing the signature collection to specific modules or devices. The setup can be done quickly with no major test changes. HP-IB All measurement and control functions are fully programmable.    Composite signature Composite signatures are computed for any grouping of digital signals. If the composite compares correctly to the reference signal, all of the signatures are correct, and do not have to be compared individually.

   Signature memory Signatures are stored in memory after the probe switch is pushed. The memory stores the last 32 readings. Signatures can be compared in groups, not after every probe, by reviewing memory in the RECALL mode.

Agilent/HP 82357B USB 2.0 USB/GPIB Interface High-Speed

Rent me for $100 a month

Features

• Easy connection - plug and play interface
• Upgraded - USB 2.0 interface (USB 1.1 compatible) and IEEE 488 interface (connect up to 14 GPIB instruments)
• Standard - industry libraries mean you don't rewrite software. IO Libraries Suite 14.2 now shipping
• High-speed - transfer over 1.15MB/sec
• Added feature - Parallel Polling (check response of up to 8 devices at one single poll)
• Fast and easy connection to GPIB instruments
• Use standard USB interface
• Interface with up to 14 GPIB instruments
• IEEE-488 compatible
• Transfer over 1.15 MB/s with large block transfers
• Use industry standard software
• Parallel polling capability

Agilent/HP 8447B .4-1.3 GHz Amplifier

Rent me for $100 a month

   The Agilent/HP 8447B is a small amplifier covering the frequency bands of .4 to 1.3GHz. It provides a minimum of 22dB gain. The inputs and outputs are BNC female. Switch selectable on the rear panel for 115/230 volt operation. Perfect for preamps or general laboratory usage.

Agilent/HP 85093C 2-port RF Electronic Calibration Module

          Rent me for $500 a month

The Agilent 85093C RF electronic calibration (ECal) module makes calibration of vector network analyzers fast, easy, and accurate. ECal is a precision, single-connection calibration technique for your vector network analyzer. Performing a full two-port calibration takes less than half the time and number of connections using ECal versus mechanical cal kits. Furthermore, the accuracy of the calibration is comparable between electronic and mechanical methods. Traditional mechanical calibrations require intensive operator interaction, which is prone to errors. With ECal, the operator simply connects the ECal module to the network analyzer and the software controls the rest.

ECal modules are transfer standards capable of transferring the factory calibration accuracy to your network analyzer. The new 85093C RF electronic calibration system is now easily controlled by one of two methods depending on the network analyzer. The Agilent PNA and ENA series of network analyzers controls the module directly through a USB interface. The Agilent 8753E/ES/ET network analyzers require an 85097B interface kit to control the module.

Features

• Fast full two-port calibration with a single connection
• Simple non-insertable device calibration
• NIST traceable accurate calibrations
• Reduced connector wear
• USB interface for direct control with PNA and ENA series of network analyzers
• Reliable solid-state switching
• Mixed connector options available (3.5 mm, Type-N 50 ohm, and 7-16)

  Electronic calibration (ECal) is a precision, single-connection, one-, two-, three-, or four-port calibration technique for your vector network analyzer. ECal modules use fully traceable and verifiable electronic impedance standards. The modules are state-of-the-art, solid-state devices with programmable and highly repeatable impedance states. ECal modules are transfer standards that provide consistent calibrations and eliminate operator errors while bringing convenience and simplicity to your calibration routine. Consistent calibrations provide consistent measurements. ECal replaces the traditional calibration technique, which uses mechanical standards. With mechanical standards you are required to make numerous connections to the test ports for a single calibration. These traditional calibrations require intensive operator interaction, which is prone to error. With ECal, a full one- to four-port calibration can be accomplished with a single connection to the ECal module and minimal operator interaction. This results in faster and more repeatable calibrations.

Agilent/HP 85700A 32 KB RAM Memory Card

   The Agilent/HP 85700A 32 kilobit RAM is used on many different Agilent/HP products as a removable storage media. Stock up while you can. Uses a small memory battery on the edge of the memory card to hold the data. Depending upon your instrument you can store settings, traces and setups and move them between instruments.

Agilent/HP 8970A Automatic Noise Figure Meter

Rent me for $250 a month

Requires a 346A/B/C noise source to operate

  The 8970A Noise Figure Meter takes the mystery out of noise figure measurements. A microprocessor is used to make the myriad calculations and corrections necessary for truly accurate, convenient and flexible noise figure measurements. RF and microwave (with external local oscillator, sold separately) measurements from 10MHz to at least 26.5GHz are equally simple; any IF between 10 and 1500MHz may be used. Displays both noise figure and gain, calibrated display on oscilloscope or recorder, and powerful special function enhancements. The ENR calibration table of the noise source may be stored in the 8970A, and a properly interpolated value is automatically used at each frequency.

Features

• Frequency range: 10 MHz - 1500 MHz direct/26.5 GHz with external local oscillator.
• Accurate and simple, swept or CW measurements.
• Automatic operation, 10 MHz - 26.5 GHz.
• Second stage correction.
• Display of both noise figure and gain.
• Calibrated display on oscilloscope or recorder.
• Powerful special function enhancements.

  In telecommunication, noise figure (NF) is the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature (usually 290 K).

The noise figure is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise. In heterodyne systems, output noise power includes spurious contributions from image-frequency transformation, but the portion attributable to thermal noise in the input termination at standard noise temperature includes only that which appears in the output via the principal frequency transformation of the system, and excludes that which appears via the image frequency transformation.

 Noise figure is a widely used figure of merit for the noise performance of devices, subassemblies, and complete systems. As performance requirements have increased, it has become increasingly important to be able to measure noise figure accurately and conveniently. A 0.34-db difference in the noise figure of low-noise amplifiers for satellite earth stations can translate into a fivefold difference in price. The new HP model 8970A Noise Figure Meter makes outstanding contributions to this field in accuracy, convenience, and flexibility. The use of a microprocessor enables it to correct several of the errors that have been accepted as part of the measurement uncertainty in the past.

Agilent/HP 8970B Noise Figure Meter

Rent me for $400 a month

Used with 346 or 347 family noise sources, the 8970B noise figure meter takes the mystery out of noise figure measurements, making them easy, accurate and repeatable. Low instrument uncertainty and automatic second-stage correction make it possible to make accurate noise figure readings, even for low-gain devices. The instrument has special measurement modes for mixer measurement and is capable of controlling external local oscillators and the 8971C noise figure test set

Features

• Simultaneous noise figure and gain measurements
• Easy characterization of amplifiers and frequency converting devices

The HP 8970B Brings Ease And Confidence To Noise Figure Measurements

   With the HP 8970B Noise Figure Meter, noise figure measurements from 10 to 1600 MHz (2047 MHz optional) are easy, accurate, and repeatable. You save precious time, money, and resources, since the measurements are done quickly, accurately, and with less chance of mistakes. Measurements are easy because the HP 8970B does all the work:

? Tunes its input frequency between 10 and 1600 MHz

? Controls an external LO for receiver or microwave measurements

? Controls the noise source to turn it ?ON? or ?OFF?

? Makes the noise power measurements

? Calculates the noise figure

? Removes the effects of the measurement system?s noise

? Compensates for losses before or after the DUT

? Displays the results in either noise figure, effective noise temperature (Te), or Y factor

In addition, the wide dynamic range of the HP 8970B allows simultaneous gain measurements up to 40 dB or loss measurements to 20 dB, with no external attenuation or amplification. The low instrumentation uncertainty (±0.1 dB) and measurement stability of the HP 8970B give you confidence in your noise figure results. Automatic second-stage correction makes accurate noise figure readings possible even for low gain devices.

Extend the HP 8970B To Microwave Frequencies

   Many components and receivers require noise figure measurement at frequencies greater than 1600 MHz. If you already own an HP 8970B Noise Figure Meter, you don?t need to worry about building a custom down-converter to measure noise figure at microwave frequencies. The HP 8971C combines, in one easy-to-use package, all of the components neccessary for microwave downconversion to the HP 8970B?s frequency range (10 to 1600 MHz). Accurate broad band measurements from 10 MHz to 26.5 GHz are possible with a single calibration and sweep. Custom solutions are available to 110 GHz.

Alcoa/Fujikura FSM-40S Fusion Splicer

Rent me for $1000 a month

 

   The FSM-40S is a field-friendly, high-portable mini-splicer. Automatic core to core low-loss splicing regardless of fiber quality or age. Fast 18-second splicing time. Multiple pre-programmed modes for specialized splicing. This splicer is designed for use in harsh conditions and features an innovative wind protector, which allows splicing in 30 mph cross winds. Excellent visibility in bright sunlight with 5-inch LCD monitor.

Features

• Core-to-core fiber alignment system (PAS)
• Fast "15sec." splicing & Full automatic operation
• Compact, lightweight and various power supply options
• 2 CCD cameras, No up-down mirror
• High resolution 5 inch color LCD monitor
• Simultaneous X & Y axes observation
• Automatic Arc calibration function for stable arc discharge
• Automatic fiber type identifier and self diagnostic test function

Specifications
 

• Fiber Splicing Capability: SM, MM, NZ-DS (non-zero dispersion-shifted), DS, CS (cutoff shifted), and Erbium-doped fiber
• Splice Loss: 0.02dB with SM fiber, 0.01dB with MM, and 0.03dB with NZ-DS fiber (typical), 0.04db with DS fiber
• Splice Sleeve Compatibility: both 60mm and 40mm sleeves, as well as micro sleeves
• Atmospheric Compensation Function: fully automatic up to 3,500 meters (11,500 feet)
• Automatic temperature and humidity compensation
• Operating Temperature: -10^oC to +50^oC
• Storage Temperature: -40^oC to +80^oC
• Dimensions (W x D x H): 172mm x 186mm x 180mm
• Weight: 4.9 kg (10.8 lbs)
• Attenuation Capability: Programmable from 0.1dB to 15dB
• Splice Data Storage : 2000 splice data records

 

Avo/Biddle 246006 C-BITE Compact Battery Condition Tester

Rent me for $400 a month

   The C-BITE Compact Battery Condition Tester is ideal for determining the condition of batteries in distributed power (outside plant), wireless, customer premise and other telecommunications installations, Railroad signal and communications, smaller UPSs and emergency lighting, as well as many other types of installations.

Features

• Instantaneously checks battery condition and compares to a baseline
• On-line measurements of lead-acid and NiCd batteries
• Stores, prints, downloads 210 data sets in up to eight tests
• Direct intercell connection resistance measurements

 

   The operational life of a battery varies greatly depending on the pattern of use (frequency of power failures, continuous operating time, etc.) and the environmental conditions of the site. With repeated cycling of a storage battery over a long interval, battery performance gradually deteriorates and the internal resistance increases until the battery will no longer take a charge or the battery falls below 80% of its rated capacity. Faults may also be caused by internal short-circuits, negative lug rot, sulphation, etc., making the battery incapable of supporting the load during an event. It is necessary, therefore, to measure the internal resistance, float voltage and intercell connection resistance, and the temperature of the battery or the environment in order to properly assess the condition of the battery. However, experience has shown that many battery failures occur simply due to loose intercell connections caused by the ?cold-flow? phenomenon at the negative battery terminal. The C-BITE finds loose connections by directly measuring intercell connection resistance.

   The C-BITE measures the internal AC resistance, intercell connection resistance, float voltage and temperature (with an optional probe) of secondary batteries. The internal AC resistance is measured by applying a constant alternating current (1000 Hz) to the cell being measured. The internal AC resistance is then calculated from the voltage drop that is measured (following Ohm?s Law). In order to obtain the voltage drop that is due only to the cell?s internal resistance, synchronous detection circuitry is used. By using synchronous detection, a more accurate measurement is possible. A four-wire measurement (Kelvin-type) is utilized to eliminate any errors due to lead wire resistance.

   Another advantage of AC resistance is that it is not affected by the DC voltage of the battery system. Figure 1 shows a typical schematic diagram of measuring procedure. The C-BITE Compact Battery Condition Tester takes measurements of secondary batteries on-line. The user may enter comparator values for the Warning and Fail resistance levels as well as a low voltage level. Then measure each battery and intercell connector sequentially. Each result is then displayed on the LCD. It is possible to review previous cell data at any time during the test. To print test data, simply connect the C-BITE Digital Printer to the C-BITE and press the print button. All test data are printed with statistical analysis and bar graph.

B&K 4152 Artificial Ear

USES

• Frequency response and sensitivity measurements on insert earphones and headphones
• Calibration of audiometers

FEATURES

• Conform to IEC and ANSI standards
• Complete reproducibility of results
• Well-defined measuring conditions
• 2 cm3 and 6 cm3 couplers
• Adjustable clamping force

The Artificial Ear Type 4152 have been designed for measurements in the audiometric and related fields. They enable electroacoustical measurements on either insert  earphones or headphones to be carried out under well defined acoustical conditions, which are of great importance for the comparability of different designs and the reproducibility of measurements. The Artificial Ear Types 4152 consist of an acoustic coupler, a main housing containing the sockets for the connection of a Brüel & Kjær condenser microphone and a base plate with a mechanism for clamping the object being tested.The clamping mechanism is spring loaded and provides a force which can be adjusted from 2 N (approx. 0.2 kg) to 10 N (approx. 1 kg) as recommended by the relevant ANSI Standards, the actual force value being set on a scale engraved on the clamp holder. To minimise the effect of vibration during the measurements, each Artificial Ear is isolated from shock and vibration by means of three soft rubber feet.

In Artificial Ear Type 4152 the socket for mounting the measuring microphone permits use of a Brüel & Kjær 1″ Condenser Microphone Cartridge Type 4144 with associated Preamplifier Type 2669 L (Adaptor DB 0962 required). The couplers (see Fig. 1) supplied with the Artificial Ear consist of a 2 cm3 Coupler DB 0138 in accordance with IEC 126 and ANSI S 3.7?1973 for measurements on hearing aid earphones, and a 6 cm3Coupler DB 0913 which fulfils the requirements of the NBS 9 A Coupler and the ANSI S3.6?1969 and IEC 303 Coupler for measurements on headphones.

Berkeley Varitronics Systems Gator 1850-2100 MHz Portable Stimulus Test Transmitter

Rent me for $1000 a month

Delivers up to 43 dB or 20 Watts for testing field applications or coverage

   All Gator transmitters feature Class A power amplification, rugged, weatherproof housing and built-in VSWR antenna protection. It?s light weight makes Gator a versatile transmitter suited for both field and laboratory work.

PERFECT FOR MEASURING SIGNAL PROPAGATION, POSITIONING ANTENNAS, SETTING POWER LEVELS OR VALIDATING RF COVERAGE.

   Gator features an agile frequency synthesizer, dynamically controlled power amplifier and a built-in modem and DTMF (touch tone) decoding for remote control of all transmitter parameters via a phone line or cellphone. Remote adjustments include the power level, channel or frequency assignment, and transmit On/Off. Included Windows® PC controller software and user adjustable knobs allow for pinpoint accurate adjustments in 0.1 dB increments, frequency adjustments and step size. Gator may be powered by standard 110-240 VAC power from any outlet, generator or battery-powered DC source. Dual cooling fans provide excellent heat dissipation and ensure the purest RF signal output. GSM modulated schemes and custom frequencies available upon request.

Features

• Pure spectrum Class A power amplifier
• Weighs only 23 pounds
• Power amplifier with continuous adjustable power output ± 0.1 dB over 32 dB range
• Water resistant, rugged 18? x 15? x 6? ABS plastic case
• Microprocessor-controlled with front panel soft-keys or remotely controlled with an internal modem allowing for user programmable modulation schemes, power levels, channels, and frequencies
• Calibration/Usage intergrated hours meter
• 240 x 64 LCD with vacuum fluorescent backlighting
• VSWR antenna protection and internal forward and reverse measurement
• Dual cooling fans
• Built-in thermal overheat protection for amplifier
• Battery backed-up SRAM stores all user selectable parameters in the event of a power loss
• Powered from 110-240 VAC 50/60 Hz, UL, CSA approved
• CW identifier for FCC CP identification
• All parameters can be adjusted remotely via RS-232 or the internal modem or DTMF signaling tones

   All Gator transmitters feature Class A power amplification, rugged, weatherproof housing and built-in VSWR antenna protection. It?s light weight makes Gator a versatile transmitter suited for both field and laboratory work. Gator? features an agile frequency synthesizer, dynamically controlled power amplifier and a built-in modem and DTMF (touch tone) decoding for remote control of all transmitter parameters via a phone line or cellphone. Remote adjustments include the power level, channel or frequency assignment, and transmit On/Off. Included Windows® PC controller software and user adjustable knobs allow for pinpoint accurate adjustments in 0.1 dB increments, frequency adjustments and step size. Gator? may be powered by standard 110-240 VAC power from any outlet, generator or battery-powered DC source. Dual cooling fans provide excellent heat dissipation and ensure the purest RF signal output. GSM modulated schemes and custom frequencies available upon request.

Biddle/Avo Model 246001 Bite Battery Impedance Test Set

Rent me for $500 a month

 

   Unlike load cycle testing that involves substantial downtime and repeated discharges, using the BITE requires no battery discharge, nor do they stress the battery in any way compared to other techniques. With a test time of less than 20 seconds for each cell and intercel