introduction to 85108a pulsed network analyzers l.
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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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Presentation Transcript
  • 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
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
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

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
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
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
Pulse Meas.-Time Domain
  • Display Time Domain Pulse Profile
  • Choose Pulse Profile in Domain menu
  • Measure only at a single frequency
high power meas
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
Connectors for NA

PSC: Precision Slotless Connector

cables for na
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
  • 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
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
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
Swap Equal Adaptors

Swap Equal Between-Series Adaptors

Swap Equal In-Family Adaptors

adaptor removal
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
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
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
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
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
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
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