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User Manual 

 

RPC-N 75 

 Calibration Kit

  

P5CK14A-170 and P5CK010-170

 

P5CK14A-170  

 

 

Rosenberger Hochfrequenztechnik GmbH & Co. KG  
P.O.Box 1260       D-84526 Tittmoning       Germany 
www.rosenberger.com

 

Tel.    : +49 8684 18-0  
 
Email : [email protected]

 

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4. VNA Calibration 

4.1 VNA Calibration 

 

A  VNA  is  only  as  useful  as  the  accuracy  of  the  measurements  it  makes,  and  this  requires  the 
instrument  to  be  calibrated.  The  calibration  process  employs  a  technique  called  vector  error 
correction,  in  which  error  terms  are  characterized  using  known  standards  so  that  errors  can  be 
removed from actual measurements. The process of removing these errors requires the errors and 
measured quantities to be measured vectorially (thus the need for a vector network analyzer). 
 
 

Main setting parameters

 
It is good practice to start your measurement by selecting the main setting parameters. 
 

  Sweep type (linear / logarithmic) 

  Sweep range (start frequency / stop frequency) 

  Number of points (frequency step size) 

  Source power 

  IF bandwidth (small IF bandwidth basically increases the dynamic range) 

  Sweep time 

 
Connect test port cables and adapters to your VNA as needed for your specific measurement task. 
 

Calibration techniques 

 
A  very  large  number  of  calibration  techniques  have  been  developed  to  calibrate  a  VNA.  The 
following list describes calibration techniques you can apply with this calibration kit along with their 
features and applicability for use in specific situations.  
 

One-port calibration 

 

OSL (OSM)

   

 

Open-Short-Load (Open-Short-Match) 

 
When  only  reflection  measurements  are  needed,  the  fastest  and  easiest  calibration 
technique is OSL. It requires 3 connections of calibration standards on the reference plane. 

 

Two-port calibrations 

 

OSLT (TOSM)

 

 

Open-Short-Load-Thru (Thru-Open-Short-Match) 

 
OSLT  is  the  most  commonly  used  two-port  calibration  method.  The  Thru  connections  are 
performed by using well-known, precision calibration adapters in male-male or female-female 
configuration or as a direct connection of the male and the female test ports.  
 
 
 
 

Содержание P5CK14A-170

Страница 1: ... GmbH Co KG P O Box 1260 D 84526 Tittmoning Germany www rosenberger com Tel 49 8684 18 0 Email info rosenberger com Page 1 18 Dieses Dokument ist urheberrechtlich geschützt This document is protected by copyright Rosenberger Hochfrequenztechnik GmbH Co KG P5CK010 170 Full Version P5CK14A 170 Industrial Version ...

Страница 2: ... 3 Kit Documentation 1 4 Calibration Certificate 1 5 2 Specifications Environmental Requirements 2 1 Electrical and mechanical Specifications 2 2 3 Standard Definitions Standard Definitions 3 1 Installation of Standard Definitions 3 2 Standard Definitions file nomenclature 3 3 4 VNA Calibration VNA Calibration 4 1 Calibration Check 4 2 5 Calibration Kit Service Calibration interval 5 1 Spare parts...

Страница 3: ...ustomer specific Calibration Kits all VNA calibration methods may not be available 1 1 Calibration Kit Normal Use Calibration Kits are used as an accessory for VNAs to perform vector error correction Vector error correction is the process of characterizing systematic errors of the measurement system by measuring known calibration standards and then mathematically removing the effects of these erro...

Страница 4: ... checked for gauge concentricity and integrity of the contact fingers Detailed procedures are described in Chapter 6 and 7 Tighten the connector coupling nuts to the recommended torque with the torque wrench Do not over torque Consider the power applied to the Load calibration standards Maximum power limits for the sum of RF and DC power are defined in the specific data sheets It is good lab pract...

Страница 5: ...bration load jack P5K170 C1AS3 1 Calibration adaptor plug plug P5S121 S2AS3 1 Calibration adaptor jack jack P5K121 K2AS3 1 Matching Attenuator RPC N 50 Ω plug 75 Ω jack 05S1P5 K2AS3 1 Matching Attenuator RPC N 50 Ω jack 75 Ω plug 05K1P5 S2AS3 1 Combi wrench 53W011 000 13 mm 14 mm 15 mm 16 mm 1 Torque wrench 53W009 000 20 mm wrench size 1 1 Nm torque 1 Table 1 1 Parts of the P5CK010 170 Calibration...

Страница 6: ... precautions and information for installing Standard Definitions on a Vector Network Analyzer Calibration Certificate See chapter Calibration Certificate User Manual This document 1 5 Calibration Certificate Each calibration kit comes with a calibration certificate Measurement results and uncertainties for all calibration standards the Gauges and the Torque Wrench are included Standard scope of de...

Страница 7: ...cations are defined for all calibration standards and the torque wrench in the specific data sheets 3 Standard Definitions 3 1 Standard Definitions Standard definitions provide the data needed to mathematically describe the electrical characteristics of each calibration standard Two types of standard definitions are available Model based standard delivery These are the traditional standard definit...

Страница 8: ...is a more complex process Please consult the VNA operating manual Some network analyzers allow a step by step input of the model based standard definitions during the VNA calibration without previously loading them Updating After a re calibration the standard definitions are optimized on the basis of the actual measurements Data files have to be imported like described before For a manual update o...

Страница 9: ...in setting parameters Sweep type linear logarithmic Sweep range start frequency stop frequency Number of points frequency step size Source power IF bandwidth small IF bandwidth basically increases the dynamic range Sweep time Connect test port cables and adapters to your VNA as needed for your specific measurement task Calibration techniques A very large number of calibration techniques have been ...

Страница 10: ...available In cases when the two VNA test ports have different connector systems installed e g RPC N 75 Ω and RPC N 50 Ω UOSM can handle this situation A second calibration kit is needed Calibration Procedure The procedures to perform a VNA calibration are very different between the VNA models Modern VNA often guide you thru the settings and actions For details please consult the manual of your spe...

Страница 11: ...sales office Please use the Service Form at the end of this manual if there are any known problems with your calibration kit 5 4 Extent of Rosenberger Re Calibration Services Every calibration kit sent for re calibration or repair the following services are performed Cleaning of connector interfaces Optical check of connector mating planes contact pins and contact fingers Check of connector gauge ...

Страница 12: ... good connector repeatability and its effect on the overall uncertainty of a measurement procedure should encourage careful inspection interface gauging and handling of coaxial connectors Prior to use a visual examination should be made of a connector or adaptor particularly for concentricity of the centre contacts and for dirt on the mating planes It is essential that the axial position of the ce...

Страница 13: ...of the utmost importance that connectors do not damage the test equipment interfaces to which they are connected Poor performance of many coaxial devices and cable assemblies can often be traced to poor construction and non compliance with the mechanical specifications The mechanical gauging of connectors is essential to ensure correct fit and to achieve the best performance This means that all co...

Страница 14: ...itical limits should be done in different orientations averaging up to 4 single measurements When a gauge block is used to initially adjust the gauge a torque spanner should be used to tighten up the connection to the correct torque 6 2 3 Connector gauge measurement resolution Because of connector gauge measurement resolution uncertainties one small division on the dial and variations in measureme...

Страница 15: ... Dieses Dokument ist urheberrechtlich geschützt This document is protected by copyright Rosenberger Hochfrequenztechnik GmbH Co KG Figure 6 1 Connector gauges and gauge blocks for the RPC N 75 Ω connector The Gauge Blocks are set to the reference gauge Pin Depth for the RPC N 75 Ω connector Please keep in mind that there might be different values for other N 75 Ω connector types NOTE For further I...

Страница 16: ...on in which the centre conductor extends beyond the outer conductor mating plane This may result in buckling of the socket contacts or damage to the internal structure of a device due to the axial forces generated NOTE At no time should the pin depth of the connector be protruding Recession is the condition in which the centre conductor is set back from the outer conductor mating plane The amount ...

Страница 17: ...all centre conductors are within the observed pin depth values in Table 2 2 Refer to 4 2 Interface Dimensions and Gaging 5 Carefully align the connectors The male connector centre pin must slip concentrically into the contact finger of the female connector 6 Push the connectors straight together and tighten the connector nut finger tight CAUTION Do not turn the device body Only turn the connector ...

Страница 18: ...When disconnecting a sliding load leave the centre conductor pullback handle in the locked position Use the combi wrench to prevent the device body from turning Use torque wrench to loosen the connecting nut Complete the separation by hand turning only the connecting nut Pull the connectors straight apart without twisting rocking or bending either of the connectors Draft Date Approved Date Rev Eng...

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