Bk-precision 4078 - Manual Manuel d'utilisateur télécharger pdf (Page 95)

5.3 Performance Tests

The following tests verify that the waveform generator operates and meets specifications.

Perform the tests after a warm-up period of 30 minutes at an ambient temperature of 22°C ±

3°C.

You can use these tests for periodic inspection and for inspection after repair.

NOTE In the following procedures, all test conditions for the waveform generator are power-up

conditions with output ON, unless otherwise specified.

5.3.1 Frequency Accuracy

Specification: 0.002% (20ppm) for the DDS waveforms. 0.005% for the Arbitrary waveforms.

Procedure:

1. Connect the OUTPUT connector to the counter input using a 50 ohm coaxial cable and a 50

ohm feedthrough termination.

2. Select SQUARE to generate a square waveform with 1MHz frequency and 5Vp-p.

3. Set the counter to measure frequency with maximum digits resolution.

4. CHECK for a frequency reading between 999980 Hz and 1000020 Hz.

5. Select ARB waveform. Press F1 - RATE and enter 1 us.

4 Connect the unit REF OUT connector (on the rear panel of the unit) to the counter, using the

coax cable and 50 ohms termination.

5 CHECK for a frequency reading between 999950 Hz and 1000050 Hz.

5.3.2 Amplitude Accuracy

Specification: ±1.0% ±10mV of programmed value, into a 50 ohms termination, for a waveform

frequency of 1KHz.

Procedure:

1. Connect the OUTPUT connector to the input of the TRUE RMS DVM using a 50 ohm coaxial

cable and the 50 ohm 0.1% termination.

4 Set the DVM to measure ac volts.

5 Set the unit to generate a SINE wave signal with 1 KHz frequency and an amplitude of 10Vp-p

6 CHECK that the measured voltages on the DVM at 10Vp-p, 5Vp-p, 3Vp-p, 1Vp-p, 100 mVp-p

and 50mVp-p are in the accuracy range:

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 101 102 103

Pas de commentaire

Bk-precision 4078 - Manual Manuel d'utilisateur Page 95