Controlled Impedance Test System
New
CITS900s4
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Controlled Impedance Test System
New
CITS900s4
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| CITS900s4 Brochure (Screen resolution) |
| CITS900s4 Brochure (Print resolution) |
| Accessories and spare parts |
| Purchasing a used CITS? Check here for relicensing information |
| As
a PCB manufacturer, you are almost certainly now
producing controlled impedance PCBs for your customers -
it is estimated that within a few years these types of
boards may account for some 70% of the market. But how do
you verify the PCBs' characteristics, control your
production process and demonstrate quality conformance to
your customers?
CITS900s4 - 4 Channels Polar produces a comprehensive
range of special test probes,
including the IPD-100 differential model shown here. An
innovative variable pitch model, known as the IP-50V, is
also available for laboratory use. |
Impedance measurement made easy
Controlled impedance PCBs are used across a broad range of applications to help ensure high frequency signal integrity. Designers invariably specify these types of PCBs whenever the edge speeds of digital signals are faster than 1ns, or analog signals climb above 300MHz. The characteristic impedance of a PCB trace is determined by the dimensions of the trace and the properties of the PCB material - which can vary from batch to batch. To control trace impedance, PCB manufacturers usually vary trace width to compensate for different batches of PCB material. Historically, they were then forced to use specialist laboratory equipment, such as a time domain reflectometer (TDR), to measure the characteristics of a representative trace etched on the board or a test coupon. This approach was complex, expensive, and far from ideal in a production environment. Many electronics designers - especially those pushing performance boundaries in the defense/aerospace, communications and IT industries - are now taking controlled impedance PCBs a stage further, by using differential signals and balanced traces to improve noise immunity and reduce timing errors on very high speed interconnects. For PCB manufacturers serving these rapidly-growing electronics sectors, verifying the differential impedance of these balanced traces is now a simple task. |
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Easy to use CITS impedance test systems are exceptionally easy to use. Powerful Windows-based software automates every aspect of testing, enabling the entire process to be controlled by a single click of a mouse or footswitch. You simply position the microstrip probes, select a test file containing the normal PCB test impedance and tolerance, and press the footswitch. There is no requirement to perform any of the adjustments that are conventionally associated with complex TDR measurements, such as setting-up vertical gains, pulse time delays and timebase values. For maximum throughput, the CITS can execute a series of impedance tests automatically, prompting you to reposition the probes as appropriate. Test results are simple to understand - the CITS automatically processes the data to produce an unambiguous display of characteristic impedance vs distance, and provides clear visual indication of pass/fail status. Automatic datalogging enables test results - together with system set-up data and measurement criteria - to be easily exported to a wide variety of third-party database or spreadsheet packages for real-time statistical process control. The pass/fail status of each test is also made available via opto-isolated signals on the instrument's rear panel, facilitating integration with other factory automation equipment. Traceable measurement activity Traceable measurement accuracy complements the CITS simplicity of operation.. Furthermore, QA specialists still have the freedom to specify complex measurement parameters such as velocity of propagation and loss compensation, as well as standard test functions like pass/fail limits, result handling and data logging. Multi point calibration with reference air lines ensures traceable impedance measurements from under 28 Ohms single ended to over 150 Ohms differential. You can print test results to provide conformance reports for your customers, store the data on disk for archive purposes or future analysis, or export it for real-time SPC purposes. An optional datalog report generator (DRG) accommodates a wide variety of standard forms, for simplicity of reporting. A barcode reader is also available as an option, which enables PCB identification labels to be scanned-in during the test process, reducing handling time and eliminating error. New DC resistance coupon measurement option
Some OEMs require the additional logging of DC resistance in addition to measuring the high frequency impedance of the transmission line. The CITS900s software now has an option to add DC resistance test, and datalog results alongside impedance test measurements. Accurate DC resistance measurements are taken with an Agilent 34410a DMM with custom Polar Kelvin style probes. Order: DC resistance test option for CITS900s |
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Design and process control When considering starting
impedance controlled production you will also find the Polar Si8000m
controlled impedance design system helps you tailor your customers
designs to your production process. It is also ideal in helping your
front end team to optimise the incoming data for maximum controlled
impedance yield. Working with both CITS and Si8000m
will give you a
complete solution for impedance test and process control. Speedstack layer stackup software can now directly export CITS900s4 test programs from a controlled impedance stackup. Professional reports with CITS DRG - Datalog report generator option The CITS900s DRG Datalog report generator option allows you to deliver finished measurement result reports in a professional format. PolarCare maintenance and technical support - now extended to CITS software: Technical help and CITS900s software maintenance is now offered through the PolarCare maintenance and support program. |
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Designed for PCB production environments
Ideal for CEM inwards inspection
Measures PCBs and test coupons
Automatic data logging