Quatech Audio/Video Capture USB 2.0 Specifikace stáhnout pdf (Strana 227)

z.one ultra and z.one ultra sp OPERATOR MANUAL 9-25

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NOTE: Pressing the Set button again toggles the active caliper selection between

the first and second velocity calipers, allowing positional corrections to be made to

both caliper instances within the strip image.

8. Press the Measure button to remove the S/D tools and exit Measure mode.

A/B Ratio The A/B Ratio is defined as V1/V2, where V1 and V2 velocities obtained by two

PW Velocity caliper measurements separated by an Unfreeze/Freeze cycle.

• Only a single instance of this tool can exist at any one time. The DDB displays

each Velocity result and continuously updates the result when the user

positions its caliper within the PW Doppler strip image.

•The DDB does not display all results together until the V2 measurement has

been activated and/or completed.

 To Measure A/B Ratio

1. Freeze the display with a PW Doppler strip image.

2. Press the Measure button.

3. Highlight and select A/B.

4. The Vel 1 velocity caliper will be displayed.

5. Use the Trackball to position the caliper to the desired location within the PW

Doppler strip display.

6. Press the Select button to fix the caliper and complete the Vel 1 velocity

measurement (activates the Vel 2 velocity caliper). At this time, the DDB

displays the Vel 1 and Vel 2 velocity results and the A/B calculation result.

7. Unfreeze the PW Doppler strip and acquire new data, and then press Freeze.

8. Press the Measure button.

NOTE: The A/B Ratio Measure menu is auto-selected and the Vel 2 caliper is

displayed when the user selects Measure.

9. Use the Trackball to position the caliper to the desired location within the PW

Doppler strip display. At this time, the DDB displays the Vel 1 and Vel 2

velocity results and the A/B calculation result.

10. Press the Enter button (Enter/Select button on SmartCart sp) to fix the caliper

and complete the Vel 2 velocity measurement. This also ends the A/B

measurement.

SmartCart/SmartCart sp

Only displays the Vel 1 result and updates the

result (in the DDB) as the user positions the

caliper within the strip image

SmartCart/SmartCart sp

Continuously updates the Vel 2 result as the user

positions the caliper within the strip image

SmartCart/SmartCart sp

Continuously updates the Vel 2 result as the user

positions the caliper within the strip image

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Quatech Audio/Video Capture USB 2.0 Specifikace Strana 227