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Adapter Removal

Calibration Procedure

Create Cal Set for Port

Port

Cal

Srt

Create Cal Set for Port 2

Port

2 Cal

Adapter Removal Mathematics

Adapter and

the

First create the Port 1 calibration set by performing the TRL

calibration between Port 1 and the adapter. Keep

the adapter connected to Port 2 during the entire

procedure. Save the calibration in Cal Set

Next create the Port 2 calibration set by performing the

TRL 2-Port calibration between Port 2 and the adapter.

Keep the adapter connected to Port 1 during the entire

procedure. Save the calibration in Cal Set 2.

The Adapter Removal function mathematically combines

the Port 1 cal set with the Port 2 cal set to produce a third

cal set having the effects of the adapter removed. The

resulting cal set is as if Port 1 and Port 2 could be connected

together.

When the two calibrations have been saved, proceed with

the adapter removal sequence as follows:

Press:

CAL

MORE

MODIFY CAL SET

ADAPTER REMOVAL

Press

CAL SET for PORT 1,

then

CAL SET 1.

Press

CAL SET for PORT 2,

then

CAL SET 2.

Press

ADAPTER 3.5 mm C.l.

This specifies the

calibration kit that includes the length specification for the

precision adapter.

Press

MODIFY SAVE,

then

CAL SET 3.

The new calibration set is computed and stored. 2-Port

correction is turned on.

Now remove the third adapter and connect the device under

test.

The display should now show an accurate S-parameter

measurement of the device.

Summary of Contents for 85052c

Page 1: ...User s Guide HP 85052C Precision Calibration Kit HEWLETT PACKARD ...

Page 2: ...UCT NOTE PRODUCT NOTE CONNECTOR SERVICE GUIDE a510 5A 851 O 8A CARE CARD MANUAL Using the H P 85052C H P 85052c Operating and Precision Service Manual Calibration Kit HP 85052C Precision Calibration Kit Operating and Service Package ...

Page 3: ... Test Port Return Cables Install Precision Adapters Air Line Frequency Coverage Load Calibration Kit Definition Measure Standards When Stop Frequency is Greater than 7 GHz When Start Frequency is Less than 7 GHz When Start Frequency is Less than 2 GHz Check the Calibration 11 Chapter 3 Noninsertable Calibrations General Theory Noninsertable Device Configurations Adapter Removal Calibration Procedu...

Page 4: ...e Lowband Reflection option This guide is supplemented by a video presentation that shows how an experienced operator uses the calibration kit parts If you have access to this tape view it along with this manual first Another supplement Application Note 326 Microwave Connector Care gives general principles of microwave connector care With the exception of changing the recommended connector cleanin...

Page 5: ...tion process because the typical TRL calibration requires fewer parts that are simpler to connect and disconnect The 3 5 mm geometry connector is the most frequently used connector when frequency coverage up to 26 5 GHz reasonable commonality and durability is desired Well constructed connectors and transmission lines can work up to 34 GHz Metrology grade versions of this con nector are used for h...

Page 6: ... card in the box and the material list on the bottom of the box These are precision air lines Each one is always stored in its installation tool to help prevent damage and preserve cleanliness The shorter air line is used for measurement calibration over the 7 to 32 GHz frequency range The longer air line is used for measurement calibration over the 2 to 7 GHz range Each air line is fully specifie...

Page 7: ...ue on the connector parts will degrade performance In particular the inner conductors can be easily deformed by squeezing Do not use metallic tweezers or other devices to pick up or hold the parts installing the Air Lines in installation Tools 0 to 2 GHz Loads Th IS implementation of the TRL 2 Port calibration allows measurement of the loads to determine the error coeffi cients up to 2 GHz Technic...

Page 8: ...cuits are used in the procedure instead of the short circuits unless the calibration kit standard assignment definition is changed The fixed loads used for the isolation part of the calibration are the same broadband loads as used for the O 2 loads measurement Exact equivalent responses are not required for this step Three precision adapters are included in this kit Two are always recommended for ...

Page 9: ...cision slotless female con nector can be used for the female test port The 3 5 mm precision male connector used on the male end of these adapters is always required for measurements between 7 32 GHz in order to connect the 7 32 GHz air line in this kit Any 3 5 mm precision male connector can be used at frequencies less than 7 GHz hstdation Feature The precision adapter male connector has a special...

Page 10: ...orque Wrench not included When making a connection Hex Wrench for AdapterAnti Rotation Clamp 1 Carefully engage the male and female contacts and then tighten the nut by hand 2 If necessary use the spanner to hold one device stationary against the direction of torque 3 Hold the torque wrench with your thumb and index finger near the end of the handle 4 Tighten the connection until the ball in the h...

Page 11: ...ounding wrist strap connected to a conductive bench mat when working near sensitive equipment The human body almost always has some static charge You are not usually aware of this charge because the human threshold for the perception of a static discharge shock is about 30 kV ESD as low as 60 volts can damage sensitive microcircuits Clean and Inspect The accuracy of error corrected measurements us...

Page 12: ...n examine all parts carefully SPRING FORCES INNER INSERTED MALE PIN Detail of Precision Slotless Female Connector Cleaning The parts must be clean in order to achieve best results Use isopropyl alcohol dry air or nitrogen and lint free swabs to remove contaminants In general do not force cleaning materials into connector parts and do not immerse the part in cleaning fluids Just moisten the swab an...

Page 13: ...nectors must always be inspected and gaged before connecting them to the precision adapters This is not usually a problem for the DUT female connectors but may be a problem for DUT male connectors especially the economical SMA and SMA compatible types BLACK G R E C E S S I O N RED PLUS SIGN NOT USED LIMIT POINTER DIAL INDICATOR FEMALE 3 5 mm CONNECTOR GAGE BLACK P L U S SIGN P R O T R U S I O N RE...

Page 14: ...ge and must not be connected to the precision adapters The male pin of the DUT connector may fit into the gage and give a correct measurement but still be slightly too large for the precision adapter female receptacle Repair and Replacement In general bent or deformed parts cannot be repaired in the field It is necessary to return the part to an HP service center for repair or replacement The air ...

Page 15: ...ample hookup using the two cable set and two examples using a single cable The appropriate precision adapters are installed on the ends of the cables and become Port 1 and Port 2 TEST SET PORT 1 TEST PORT ANTI ROTATION TEST SET PORT 2 I 81 il ADAPTER ANTI ROTATION PORT 1 PORT 1 PORT PORT 1 2 Dual Cable Setup PORT 2 Single Cable Port 1 Female PORT 2 Single Cable Port 1 Male 15 ...

Page 16: ...t set connector Install Precision Adapters T o install the precision adapters and adapter anti rotation clamp Connect the adapter to the cable tighten finger tight and then use the spanner and the torque wrench to achieve the final torque l Loosen the adapter anti rotation clamp securing screws and slide the clamp over the adapter Align the clamp so that it can grip both the cable connector body a...

Page 17: ... Line would indicate that its data is valid only from 2 to 7 GHz However you may choose to use data from the 2 7 Line down to the 1 GHz by simply not measuring the O 2 Loads If the O 2 Loads are measured after the 2 7 Line the O 2 Loads data will replace data from the 2 7 Line 45 1 2 7 32 MHZ GHz GHz GHz GHz F1 l l i l l l Ir Jl Ll u u II aEl I 2 7 L I N E m m 7 3 2 LINE O 2 L O A D S Frequency Co...

Page 18: ...ndards just once Press CAL CAL 1 TRL 2 PORT l Connect the TRL male adapter Port 1 to the TRL female adapter Port 2 l Press THRU The HP 8510 makes six measurements they are S S S S and two specially redefined user parameters l Connect the Short circuit to Port 1 Press S REFLECT SHORT S is measured S Reflect Short Standard l Connect the Short circuit to Port 2 l Press S REFLECT SHORT S is measured l...

Page 19: ... installation tool closing the slot to release the center conductor Then pull the tool away from the connector leaving the outer and the center conductors in place Sqeeze Tool to Release then Pull GOOD BAD IL GAP l Examine the outer and center conductors to see that they are in place and concentric If the center conductor is not centered use the installation tool to align it Check Concentricity l ...

Page 20: ...of the current range are measured but only data from 7 to 32 GHz is used to compute error coefficients To remove the 7 32 GHz air line l Loosen the Port 1 nut and then carefully move the Port 2 adapter away Disconnect Port 2 l Move the adapter nut to its standard position Standard Position with Air Line Installed l Examine the outer and center conductors to see that they are in place l Carefully p...

Page 21: ... Then try to withdraw the tool and the air line parts again without closing the slot If the air line center conductor remains with the female port use the installation tool to remove it as follows Squeeze the tool and push it to engage the center conductor Hold the tool close to the connector squeeze the tool without closing the slot and pull the assembly away Use your fingers to remove the center...

Page 22: ...tool lightly to engage the center conductor Engage the Center Conductor l Squeeze the tool to close the slot then pull the tool away from the connector leaving the center conductor Remove the Tool l Examine the outer and center conductors to see that they are in place and concentric If the center conductor is not centered use the tip of the installation tool to align it GOOD BAD Check the Concentr...

Page 23: ...onnect Port 2 Engage the Tool TURN f HOLD l Insert the tool and lightly press it to engage the center conductor l Loosen the adapter nut and then disconnect the outer conductor from the adapter The center conductor will be removed with the outer conductor Remove 2 7 Line Note It is important to be very careful to move Port 2 away in a straight motion because the center conductor may stay in Port 2...

Page 24: ...ation part of the calibration as follows Connect a fixed load to Port 1 and a fixed load to Port 2 Increase the AVERAGING FACTOR for the isolation measurement to at least 128 Then press FWD ISOL N ISOL N STD S is measured Press REV ISOL N ISOL N STD S is measured Press ISOLATION DONE You may wish to reduce the averaging factor for measurement of the device under test Press SAVE TRL 2 PORT Fomard a...

Page 25: ...nitude and Phase For a second check connect the 2 7 Line to Port 1 then connect the Short circuit to the end of the air line and view the reflection response Select S D O M A I N TIME BAND PASS View the S response Use the marker to measure the responses at 0 seconds a rough measure of effective directivity and the mismatch at twice the length of the air line a rough measure of effective source mat...

Page 26: ...us calibration sequence assumed that the device under test is insertable it has a male connector on one port and a female connector on the other port Thus the measurement system can be calibrated and then the test device inserted without changing the system test port connectors However the majority of devices used in microwave systems are noninsertable Of interest here are devices having either bo...

Page 27: ...al function mathematically combines the Port 1 cal set with the Port 2 cal set to produce a third cal set having the effects of the adapter removed The resulting cal set is as if Port 1 and Port 2 could be connected together When the two calibrations have been saved proceed with the adapter removal sequence as follows Press CAL MORE MODIFY CAL SET ADAPTER REMOVAL Press CAL SET for PORT 1 then CAL ...

Page 28: ...performing the TRL 2 Port calibration procedure With correction on trace noise on the error corrected trace may increase at the points where the phase of the air line used for calibration approaches the phase of the thru often showing large discontinuities at the point where the phase of both standards is identical or separated by 180 degrees If this error is acceptable in your measurement change ...

Page 29: ...ne standards If the start frequency is lessthan 2 GHz press LOWBAND REFLECTION l Press LOWBAND REFLECT N l Connect the Short circuit to Port 1 and then press S SHORT Connect the Open circuit to Port 1 and then press S OPEN l Connect the Fixed Load to Port 1 and then press S LOAD l Connect the Short circuit to Port 2 and then press S SHORT l Connect the Open circuit to Port 2 and then press S OPEN ...

Page 30: ...u HEWLETT PACKARD Customer Order Number 85052 90059 Printed in USA April 1995 ...

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