Single Module Scanning - Handshaking

Refer to the trigger topic of the switch module in Devices for possible Trigger Input locations.

PXI Options

• Setup 3—Using Internal PXI Trigger Lines
• Setup 4—Using AUX Trigger Cable Connected to Front of PXI Switch

SCXI Options

• Setup 8—Using SH9MD-AUX Cable
• Setup 9—Using AUX Trigger Cable Connected to the Front of the SCXI Switch
• Setup 10—Using Internal PXI/SCXI Trigger lines

PXI

Setup 3—Using Internal PXI Trigger Lines

To handshake with a PXI switch, you can use the internal PXI trigger lines of a PXI chassis. In this setup, no cable is used between the DMM and the PXI switch for triggering.

1. Set Trigger Input to TTLn in niSwitch Configure Trigger.
2. Set Scan Advanced Output to TTLm in niSwitch Configure Trigger.
3. Set Measurement Complete Destination to TTLn in niDMM Configure Measurement Complete Destination.
4. Set Trigger Source to TTLm in niDMM Configure Trigger.
5. Set Sample Trigger Source to TTLm in niDMM Configure Multi Point.

Refer to the switch module in Devices for possible Trigger Input and Scan Advanced Output locations.

Setup 4—Using AUX Trigger Cable Connected to Front of PXI Switch

Some PXI switches can receive their input trigger and send their scan advanced at the front panel or terminal block. This setup uses the AUX trigger cable to trigger the switch.

1. Connect the MC signal from the DMM to the external trigger input terminal on the front panel or in the terminal block of a PXI switch.
2. Connect the Ext Trig In signal of the DMM to the Scanner Advanced terminal on the front panel or in the terminal block of the same PXI switch.
3. Set Trigger Input to External in niSwitch Configure Trigger.
4. Set Scan Advanced Output to External in niSwitch Configure Trigger.
5. Set Measurement Complete Destination to External in niDMM Configure Measurement Complete Destination.
6. Set Trigger Source to External in niDMM Configure Trigger.
7. Set Sample Trigger Source to External in niDMM Configure Multi Point.

Refer to the switch module in Devices for possible Trigger Input and Scan Advanced Output locations.

SCXI

Setup 8—Using SH9MD-AUX Cable

This setup uses an SH9MD-AUX cable between the NI 407x and the SCXI high-voltage analog bus connected to a switch in an SCXI-1000, SCXI-1001 or PXI-1010, or to the back of a PXI-1011. Refer to the SCXI Backplane Adapters in Controlling and Triggering Switches for more information.

Note  Only the NI 407x can be used in this setup. NI-DMM 2.2 or later is required.

Note  This setup cannot be used with the NI SCXI-1127/1128/1129. These modules cannot send their scan advanced signal to the rear connector.

1. Connect one end of the SH9MD-AUX cable to the 9-pin DIN connector on the front of the NI 407x.
2. Connect the other end of the SH9MD-AUX cable to the 9-pin DIN connector labeled AUX IN on the SCXI high-voltage analog bus.
3. Set Trigger Input to Rear Connector in niSwitch Configure Trigger.
4. Set Scan Advanced Output to Rear Connector in niSwitch Configure Trigger.
5. Set Measurement Complete Destination to External in niDMM Configure Measurement Complete Destination.
6. Set Trigger Source to AUX_TRIG_1 in niDMM Configure Trigger.
7. Set Sample Trigger Source to AUX_TRIG_1 in niDMM Configure Multi Point.

Setup 9—Using AUX Trigger Cable Connected to the Front of the SCXI Switch

SCXI switches can receive/send triggers from/to the front panel or terminal block. This setup uses an AUX trigger cable between the DMM and the front panel or in the terminal block of an SCXI switch. The switch is controlled by another device.

1. Connect AUX trigger cable to the 9-pin DIN connector on the front of the DMM.
2. Connect the MC cable of the AUX trigger cable to the external trigger input terminal (ext trig in) on the front panel or in the terminal block of the SCXI switch.
3. Connect the EXT TRIG IN cable of the AUX trigger cable to the scanner advanced terminal on the front panel or terminal of the same switch.
4. Set Trigger Input to Front Connector in niSwitch configure Trigger.
5. Set Scan Advanced Output to Front Connector in niSwitch configure Trigger for SCXI switches and to  External for PXI switches.
6. Set Measurement Complete Destination to External in niDMM Configure Measurement Complete Destination.
7. Set Trigger Source to External in niDMM Configure Trigger.
8. Set Sample Trigger Source to External in niDMM Configure Multi Point.

Refer to the switch module in Devices for possible Trigger Input and Scan Advanced Output locations.

Setup 10—Using Internal PXI/SCXI Trigger Lines

This setup uses the internal trigger lines of a PXI/SCXI combination chassis to trigger the SCXI switches. In this setup, no trigger cable is used between the NI PXI-407x and the SCXI switch.

Note  Only the NI PXI-407x can be used in this setup. NI-DMM 2.2 or later is required.

1. Install the NI PXI-407x in the rightmost PXI slot.
2. Set Trigger Input to TTL0 in niSwitch Configure Trigger.
3. Set Scan Advanced Output to TTL1 in niSwitch Configure Trigger.
4. Set Measurement Complete Destination to LBR_TRIG0 in niDMM Configure Measurement Complete Destination.
5. Set Trigger Source to LBR_TRIG1 in niDMM Configure Trigger.
6. Set Sample Trigger Source to LBR_TRIG1 in niDMM Configure Multi Point.