Rigol DM3058 Manual do Utilizador descarregar pdf (Página 182)

RIGOL

Programming Guide for DM3058/DM3058E

6-9

Example 4: dB Measurement

Purpose: Use commands to perform dB measurement.

dB is a common measurement unit, which is frequently used in electrician, wireless,

mechanics, oscillatory surge, mechanical power, acoustics and some other fields.

The programming implementations

——RIGOL Commands

0 *RST /* Reset the instrument */

1 cmdset rigol /* Select RIGOL commands */

2 *IDN? /* Query the equipment ID and confirm if the

multimeter works normally */

3 /* Connect the test leads under AC voltage measurement */

4 :function:voltage:AC /* Enable the AC voltage measurement */

5 :measure:voltage:AC <range> /* Set the measuring range */

6 :calculate:function DB /* Enable dB measurement */

7 :calculate:DB:reference <value> /* Set the “dB setting” value */

8 :calculate:DB? /* Query the measured value */

9 /* Return value */

The programming implementations

——Agilent Commands

0 *CLS /* Clear the instrument state */

1 cmdset agilent /* Select Agilent commands */

2 *IDN? /* Query the equipment ID and confirm if the

multimeter works normally */

3 /* Connect the test leads for AC voltage measuring */

4 conf:volt:ac <range> /* Enable the AC voltage measurement and set the

range */

5 calc:stat on /* Enable the math function */

6 calc:func db /* Enable the dB measurement*/

7 calc:db:ref <value> /* Set the “dB setting” value */

8 calc:db:ref? /* Query the measured value */

9 /* Return value */

Explanations:

1. When finish the setting of “dB reference value” in line 7, the measured result of

dB will be shown on the screen, but the result can not be returned since there is

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Rigol DM3058 Manual do Utilizador Página 182