PXIe VNA Help
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I/O Adapter for PXI/USB VNA (M98xxA, P50xxA/B, P93xxB)

Overview

M98xxA, P50xxA/B and P93xxB can output/input the signals to communicate with external peripherals via control ports (master and sub) on the front panel. The Y1731A-001 I/O adapter allows you to access the signal via SMB connectors.

Connection

The cables should be connected like the following figures. The Y1731A-001 is a passive adaptor which does not require the power.  Installing it into the PXIe chassis is not necessary. You can use it outside of the PXIe chassis.

The angle and screws prevent the cable from coming off.

No.

Part Number

Description

Qty.

1

M9800-61601

Cable Assembly, Control 150mm-LG (This cable is not furnished with Y1731A-001)

1

P5000-61603

Cable Assembly, Control 175mm-LG

M9800-61605

Cable Assembly, Control 500mm-LG

2

M9800-01201

Angle, Control Cable Assembly

2

3

0515-4351

Screw-SKT-HD-Cap HEX-SKT M3X0.5 4mm-LG

2

Port Assignment

 

Sides A and B on the Y1731A-001 are identical. You can connect the Ctrl M or S with both sides.

Main Side (Connected with Ctrl M)

Port Number

Function (Factory Default)

Alternative Function

1

High level output

  • Pulse Output 1

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

2

High level output

  • Pulse Output 2

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

3

Arbitrary input

  • Pulse Output 3

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

4

Arbitrary input

  • Pulse Output 4

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

5

RF pulse modulation input

None

6

Arbitrary input

None

 

Sub Side (Connected with Ctrl S)

Port Number

Function  (Factory Default)

Alternative Function

1

Trigger input

None

2

Pulse synchronization input

Aux Trigger In

3

Arbitrary input

  • Ready for trigger output

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

4

Arbitrary input

  • AUX trigger output

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

5

High level output

  • Index output

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

6

High level output

  • Sweep End output

  • Low or High level outputs

  • Source port (#S) external switch control output for Noise Figure

  • Receiver port (#R) external switch control output for Noise Figure

  • LO signal of module (#M) external switch control output for Noise Figure

 

I/O signal description

Signal name

Input/Output

Description

/READY FOR TRIGGER

Output

Indicates that the instrument is ready for triggering. This signal is changed to the Low level when the instrument is ready for receiving a trigger signal.

With the point trigger function on, it goes to the Low level when the instrument is ready to accept the trigger signal for the first point and goes to the High level when the trigger signal for the first point is received. When measurement of all measurement points is completed and the instrument is ready to receive the trigger signal for the first point of the next sweep, this signal goes to the Low level again.

/EXTERNAL TRIGGER

Input

An external trigger signal. When the trigger source is set to the "External," this port generates a trigger in respond to the trailing edge of a negative pulse.

/INDEX

Output

Indicates that analog measurement is complete. The /INDEX signal changes to the Low level when analog measurement (all sweeps of all channels) is complete. When the handler receives the signal, it assumes that it is ready to connect the next DUT. However, no measurement data are available until data calculation is completed.

When the point trigger function is on, it goes to the High level before staring measurement of the first measurement point and returns to the Low level after completing measurement of all measurement points.

/SWEEP END

Output

A sweep completion signal. When measurement (all sweeps of all channels) and data calculation are completed, this signal provides a negative pulse.

PULSE SYNC IN

Input

Pulse generator synchronization trigger input

RF PULSE MOD IN

Input

RF source pulse modulation drive input

Pulse Output 1 (P1)

Output

Hardwired pulse train output #1

Pulse Output 2 (P2)

Output

Hardwired pulse train output #2

Pulse Output 3 (P3)

Output

Hardwired pulse train output #3

Pulse Output 4 (P4)

Output

Hardwired pulse train output #4

Source port (#S) external switch control output

Output

Indicates that the source signal is out. This signal is changed to the Low level when the source signal is out.

Receiver port (#R) external switch control output

Output

Indicates that noise sweep. This signal is changed to the high level when the target port is used in a sweep for noise measurement.

LO signal of module (#M) external switch control output

Output

Indicates that noise sweep for dual-band parallel mode (option). This signal is changed to the high level when the target port is used in in a sweep for dual-band parallel noise measurement.

Cntrl Connector Pin Assignment

SMB Port No.

1

2

3

4

5

6

Ctrl (Micro HDMI) Pin No.

12

14

17

18

2

15

 

Interface Control

The function for each pin can be assigned by Interface Control and SCPI Command.

How to access Interface Control settings

Using Hardkey/SoftTab/Softkey

Using a mouse

  1. Press Setup > Internal Hardware > Interface Control...

  1. Click Instrument

  2. Select Setup

  3. Select Internal Hardware

  4. Select Interface Control...

 

Interface Control Dialog box

Function  When a white cell is clicked, a drop down list appears to show functions assignable to the specified port.

OK / Apply Applies the settings and closes the dialog box.

Cancel  Does not apply changes that were made, and closes the dialog box.

SCPI Command

See CONTrol:SIGNal:KDMI SCPI commands to set or read the signals, assign the alternative functions for the test port. The assigned settings are preserved for each system configuration even after preset, firmware restart and power on/off.

Timing Diagrams

Trigger Timing

All signals are active low.

T1 = 1 ms  External Trigger pulse width

T2  > 10ms Sweep End pulse width (both High and Low)

Input / Output Electrical Characteristics

All I/O Input and Output lines are TTL compatible.

Input and Input/Output lines

Lines carrying information IN (or bidirectional) to the VNA from the material handler.

Maximum Input Voltages:

-0.5 V to 5.5 V

TTL High level:

2.0 V to 3.3 V

TTL Low level:

0 V to 0.5 V

VNA Input and Input/Output Circuit Diagram

Output Lines

Lines carrying information OUT of the VNA to the material handler.

Maximum Output Current:

-10 mA to 10 mA

Output Current

TTL High level:

-5 mA

TTL Low level:

3 mA

Output Voltage

TTL High level:

>= 2.0 V

TTL Low level:

0 V to 0.8 V

VNA Output Circuit Diagram