Calibration (Verification) of RF cables

R

Ruebenn

#1
Dear Distinguished guests of the forum,

We are planning to go into RF Cable Calibration.
Can any of you suggest what are we supposed to get to calibrate these RF cables?
I know we have to have a Network analyzer and also some software to aid us,true?
If possible, kindly suggest and we would be obliged if you can also suggest me some models and makers out there or even people who can undertake this project as a part time basis?
Appreciate the help and looking forward to get a prompt reply.

Rgds
Ruben
 
Elsmar Forum Sponsor

Jerry Eldred

Forum Moderator
Super Moderator
#2
Re: Calibration of RF cables

Are you speaking of cable "calibration" or cable "testing". Also, will this be accredited or not? The reason for the second question is there are many further implications if the answer is yes.

Also, are you going to calibrate (test/verify) "RF Cables" or "RF Cable Assemblies?" What I mean by this is, are you going to test pieces or rolls of coax (i.e.: RG-58/U, etc.), or are you going to calibrate (test/verify) cable assemblies with connectors pre-installed on the ends? If testing RF, this will make potentially very big difference in results, and must be accounted for.

To really legitimately do this, you need someone professionally skilled in RF/microwave measurements or you need to have such a person design proper testing methods. Things such as the amount of torquing force used to connect a cable to the Network Analyzer, EMI/RFI issues, the quality/grade of adapters used in the setup, the highly complex settings of many network analyzers (just about have to be an RF engineer to properly operate one), and other things will validate/invalidate measurements.

What parameters will be measured? Will you be plotting dB/100 ft, SWR, Bandwidth, with/without connectors? To call it a calibration, there will need to be documented competence in RF/microwave measurements by the person doing them.

To "calibrate" RF cables (that is, to "verify" cables) you definitely need a network analyzer. Depending on what properties you want to verify, you may need a TDR (Time Domain Reflectometer). I would recommend contacting (via telephone) one or more cable OEMs and find out what they test.

There's my two-and-a-half cents. Hope this is some food for thought.
 
R

Ruebenn

#3
Re: Calibration of RF cables

Mr.Jerry,

Thanks for the useful tip.
I have called some cable makers and inititiated contact but to my dismay, they seem reluctant to share the infos that i require.
They tell me that they test for the cable loss and VSWR mainly.
I am on the lookout for an expert who is sound in the cable testing/calibration method validation and if he has knowledge in writing out a simple test program, ti would be much better.
Anyways, i will continue my search and i would bemuch obliged if you could recommend or introduce someone who is an expert in this field.

Rgds
Ruben
 
Thread starter Similar threads Forum Replies Date
M Calibration or Verification? What terminology to use ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
V Calibration certificate verification Qualification and Validation (including 21 CFR Part 11) 3
G Assigning a calibration tolerance - An x-y coordinate machine - Uncertainty as my verification tolerance General Measurement Device and Calibration Topics 4
J Calibration/Verification Records (IATF 16949 7.1.5.2.1) IATF 16949 - Automotive Quality Systems Standard 5
D How to set equipment calibration/verification criteria General Measurement Device and Calibration Topics 1
E IATF 16949 Cl. 7.1.5.2.1 - Calibration and Verification Records Requirements IATF 16949 - Automotive Quality Systems Standard 1
S Calibration and Verification requirement for foreign EASA Part 145 EASA and JAA Aviation Standards and Requirements 7
J IATF 16949 Cl. 7.1.5.2.1 - Gauges (Measuring Jigs) Calibration/Verification Records IATF 16949 - Automotive Quality Systems Standard 6
M Clarification on Calibration/Verification Records 7.1.5.2.1d (IATF 16949) General Measurement Device and Calibration Topics 11
B Calibration/Verification Records - IATF 16949 section 7.1.5.2.1 f) IATF 16949 - Automotive Quality Systems Standard 6
P IATF 16949 Cl. 7.1.5.2.1 "Calibration/Verification Records" Interpretation IATF 16949 - Automotive Quality Systems Standard 12
J Pneumatic & Electrical Torque Tool - Calibration/Verification of 'Power Tools' General Measurement Device and Calibration Topics 2
Q Using Caliper A to verify Caliper B - Verification of Calibration ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 5
K Verification instead of calibration?(ISO 9001:2008) Calibration Frequency (Interval) 10
K "Verification of Calibration" - CMM arm General Measurement Device and Calibration Topics 6
I Verification or calibration Fluke 8508a with 5720a? TUR not 4:1? Measurement Uncertainty (MU) 1
Q Number of Calibration Verification Points - Calipers, height gages, etc General Measurement Device and Calibration Topics 6
A Calibration/Verification of thermo-hygrometer in storage areas ISO 13485:2016 - Medical Device Quality Management Systems 9
G Is this Calibration or Verification ? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 23
D How Working Standard Calibration result use in Verification of Equipment General Measurement Device and Calibration Topics 7
M Calibration Certification Qualification vs. Verification by Uncertified Staff General Measurement Device and Calibration Topics 6
AshleyE Torque Wrench Calibration/Verification General Measurement Device and Calibration Topics 24
G BRC (British Retail Consortium) - Calibration vs. Verification Food Safety - ISO 22000, HACCP (21 CFR 120) 4
G TS-16949 7.6.2 ? Calibration/Verification Records - Assessment of the Impact IATF 16949 - Automotive Quality Systems Standard 5
JodiB Balance Calibration Verification question General Measurement Device and Calibration Topics 9
JodiB Log Book for Analytical Balance Calibration Verification General Measurement Device and Calibration Topics 4
Uriel Alejandro How to Record Evidence for Verification/Calibration of Equipment AS9100, IAQG 9100, Nadcap and related Aerospace Standards and Requirements 6
M Establishing Ranges for Weights for Calibration Verification of a Micro-Balance Calibration Frequency (Interval) 1
H Analytical Balance Calibration and Verification General Measurement Device and Calibration Topics 9
D Precision Balance Verification and Calibration Process General Measurement Device and Calibration Topics 3
D Equipment Verification and Calibration Report Standard General Measurement Device and Calibration Topics 9
P Record Retention requirements of Calibration and Verification Service Providers ISO 13485:2016 - Medical Device Quality Management Systems 11
K Calibration and Verification Records - TS 16949 Clause 7.6.2 General Measurement Device and Calibration Topics 8
P Is it compulsory to send new measuring equipment for calibration / verification? Calibration Frequency (Interval) 3
D Calibration vs. Verification and Measurement Device Labeling General Measurement Device and Calibration Topics 10
M Basis used for Calibration or Verification of Measuring Equipment ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 8
D For Reference Only or Calibration/Verification - Tape Measures for cutting bar stock ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 26
M Methods for Verification/Calibration of Video (Optical) Extensometer General Measurement Device and Calibration Topics 2
C Updating our Laboratory Calibration / Verification Procedures IATF 16949 - Automotive Quality Systems Standard 5
R Verification vs. Calibration and what to do with the results of each General Measurement Device and Calibration Topics 3
B Difference between Calibration & Verification and How to calibrate Go/No Go gauge? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 4
S Audit and Calibration question - does verification alone meet the requirements? General Auditing Discussions 5
D Calibration vs. Verification - Can we calibrate dial indicators in-house? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
P Internal Calibration or Verification - Personnel Requirements IATF 16949 - Automotive Quality Systems Standard 3
S Verification of calibration certificate Miscellaneous Environmental Standards and EMS Related Discussions 1
M Telescoping Gage - Calibration or Verification General Measurement Device and Calibration Topics 5
L Difference between Calibration, Verification and Adjust (Adjustment) General Measurement Device and Calibration Topics 6
C Verification vs. Calibration of Dial Weight Dynamometer General Measurement Device and Calibration Topics 4
A Definition Calibration vs. Verification of Calibration vs. Verification - Definitions Definitions, Acronyms, Abbreviations and Interpretations Listed Alphabetically 47
J Calibration/Verification of Overlay General Measurement Device and Calibration Topics 2
Similar threads


















































Top Bottom