Introduction to 85108a pulsed network analyzers
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Introduction to 85108A Pulsed Network Analyzers. Pengcheng Jia Dec 13, 2001. Outline. What is measurement? What is 85108 Pulsed Network Analyzer? What are the Connectors & Cables? What are the Calibration Kits? What is Non-Insertable Calibration? How to do Pulsed Measurement?

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Introduction to 85108a pulsed network analyzers l.jpg

Introduction to 85108A Pulsed Network Analyzers

Pengcheng Jia

Dec 13, 2001

Outline l.jpg

  • What is measurement?

  • What is 85108 Pulsed Network Analyzer?

  • What are the Connectors & Cables?

  • What are the Calibration Kits?

  • What is Non-Insertable Calibration?

  • How to do Pulsed Measurement?

  • How to Control by Computer?

What is measurement l.jpg
What is measurement

  • Define Measurement:

    f, P, T, expected values and tolerance.

  • Define System Configuration

  • Configure Hardware:

    User setting, Gauging, Always use ESD Protection

  • Check Hardware: DUT, Cables, Connectors

  • Calibrate

  • Verify

  • Measure

  • Analyze and Archive

System cabling diagram l.jpg
System Cabling Diagram

LO source: 10M-20 G

RF source: 10M-50 G

Test Set: 1-50 GHz

Test Set works from 1-50 GHz in 2 Bands:

1-20 GHz Use directly LO source.

6-50 GHz Use third harmonic of LO source.

Simplified na 8722d l.jpg

  • 50 MHz to 40 GHz

  • 100 dB of dynamic range

  • Excellent measurement accuracy

  • Two measurement channels

  • Four display channels

Simplified NA - 8722D

Avoid large time delay of dut l.jpg
Avoid Large Time Delay of DUT

Frequency Sweep


Step Mode: 85108A

200 ms



Ramp Mode: 8722D




=10 ns



8722D with 3K IF BW



Pulse meas freq domain l.jpg
Pulse Meas.- Freq Domain

  • Point-in-Pulse

  • Freq Domain Meas.

  • Use 1.5M Broadband IF filter (Normal meas. use 10K IF filter)

  • Adjustable Duty Cycle

  • Default: 10%

  • Adjustable Pulse Width

  • Default: 10 ms, min 1us

  • Trigger time: 5ms from 0

Pulse meas time domain l.jpg
Pulse Meas.-Time Domain

  • Display Time Domain Pulse Profile

  • Choose Pulse Profile in Domain menu

  • Measure only at a single frequency

High power meas l.jpg
High Power Meas.

+43 dBm

+43 dBm

+17 dBm

+17 dBm

Never Exceed the Power Limitation on the Test Port

Port1 & Port2: +43 dBm

RF Input Port: +17 dBm

Connectors for na l.jpg
Connectors for NA

PSC: Precision Slotless Connector

Cables for na l.jpg
Cables for NA

  • Cables (only following cables can be used for NA):

  • Semi-Rigid with K connectors

  • Flexible—Thin Jacket with K connectors (Blue, from Gore)

  • Flexible—Thick Jacket with 2.4 mm connectors (Black, from Agilent)

  • Connectors on Port 1 & 2 is 2.4 mm

  • 2.4 to 2.9 (K) adaptors are put to mate with K connector cables, Never Remove Them

  • Always Keep Connects & Adaptors Clean

  • Treat Them Gentle and Put Back to Box

Cautions l.jpg

  • Select Correct Cal Kit and Load Calibration Constants before Calibration

  • Never Remove a Calibration Standard from the Box or Use for Any Purpose Other Than Calibration

  • Never Drop the Standards to Ground

  • Always Use Special Wrench Correctly

  • Put the Cal Kits Back to Cabinet after Use

  • Report Any Discrepancy

Load configuration disk l.jpg
Load Configuration Disk

  • Load the Test Set Configuration Disk for 85110A with H60/61 option

    (Disks are stored in Drawers, never remove them)

  • Disk->Storage is Internal

  • Load->More->Machine Dump

  • MD_1_20_NP, 1-20 GHz, Non-Pulsed

    MD_1_20_PL, 1-20 GHz, Pulsed

    MD_6_50_NP, 6-50 GHz, Non-Pulsed

    MD_6_50_NP, 6-50 GHz, Pulsed

Calibration procedure l.jpg
Calibration Procedure

  • Press Cal menu

  • Choose Calibration Kit, if not installed in equipment, load the cal constant from disk

  • Choose in the Calibration Menu

  • LRM for on-wafer Calibration, Full 2-port for cable calibration

  • Follow instruction, connect standards and measure

  • Save calibration data

  • You will see “Correction On”

Swap equal adaptors l.jpg
Swap Equal Adaptors

Swap Equal Between-Series Adaptors

Swap Equal In-Family Adaptors

Adaptor removal l.jpg
Adaptor Removal

  • Calibration with adaptor on Port 2, save as Cal Set 1

  • Calibration with adaptor on Port 1, save as Cal Set 1

  • Modify Cal Set->Adaptor Removal

  • Refer the additional document for more details

  • More calibration methods are included in that file

Calibration with on wafer kit l.jpg
Calibration with On-Wafer Kit

  • Use WinCal on Controller-Dizzy

  • Calibration Constant is set in program

  • Choose LRM, since short is not good

  • LRRM is recommended for more accuracy

How to do pulsed meas 1 l.jpg
How to do Pulsed Meas.(1)

  • Frequency Domain (Point-in-Pulse)

  • Domain->Frequency

  • System->More->Pulse Config->Detector:

  • Wide BW

  • Select Maximum Points

  • Calibration

  • System->More-> Pulse Config-> High or Low

  • Set Pulse Width, Duty Cycle

  • Stimulus->More->Trigger Mode->Trigger Delay

  • Measure

How to do pulsed meas 2 l.jpg
How to do Pulsed Meas.(2)

  • Pulse Profile Domain - Single Frequency

  • Domain->Frequency

  • Stimulus->Step mode & Start->Set desired frequency

  • Domain->Pulse Profile

  • Select Maximum Points

  • Calibration

  • Measure

  • Repeat for Next Frequency

How to do pulsed meas 3 l.jpg
How to do Pulsed Meas.(3)

  • Pulse Profile Domain – Frequency List

  • Cal->Correction off

  • Domain->Frequency

  • System->More->Pulse Config->Detector: Wide BW

  • Stimulus->More->Edit List

  • Add->Start->3 G/n, Number of Points->51x1->Done

  • Add->Start->4 G/n x1->Done

  • Add->Start->5 G/n x1->Done

  • Done Frequency List, and Proceed with Calibration

How to do pulsed meas 4 l.jpg
How to do Pulsed Meas.(4)

  • Using Frequency List – Continue:

  • When begin to Measure:

  • Domain-> Pulse Profile

  • Stimulus->Frequency List->Single Segement

  • The last selected segment will be active and ready for measurement

  • Calibration will be effective for each frequency point

  • Set Pulse Polarity, Pulse Width and Duty cycle if needed

Computer control l.jpg
Computer Control

  • 2 GPIB Connectors are on the back of 8510C

  • 1 for 85108 System bus (don’t touch)

  • 1 for computer controller (already connected)

  • Dizzy is the controller

  • Use WinCal for On-Wafer Calibration and S-Parameter Measurement

  • Choose the correct VNA first

  • Config->Option->VNA->8510 or 8722

  • Use Labview Program for 85108 configuration