DSP TP104-plus Especificaciones descargar pdf (Pagina 135)

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Performance Tests

8. Sine Output Amplitude Accuracy and Flatness

This test measures the amplitude accuracy and frequency response of the internal oscillator Sine Out.

Setup

We will use the lock-in to measure the Sine Out. Connect the Sine Out to the A input of the lock-in.

Procedure

1) {PRESET} (Turn the lock-in off and on with the [Setup] key pressed)

2) Press the keys in the following sequence:

[Channel 1 Display]

Set the Channel 1 display to R.

3) Amplitude accuracy is verified at 1 kHz using various sensitivities. For each sine amplitude and sensi-

tivity setting in the table below, perform steps 3a through 3b.

Sensitivity Sine Output Amplitude

1 V 1.000 Vrms

200 mV 0.200 Vrms

50 mV 0.050 Vrms

10 mV 0.010 Vrms

a) Press

[Ampl]

Use the knob to set the sine amplitude to the value in the table.

[Sensitivity Up/Dn]

Set the sensitivity to the value in the table.

b) Wait for the R reading to stabilize. Record the value of R.

c) Repeat 3a and 3b for each amplitude in the table.

4) Frequency response is checked at frequencies above 1 kHz. The sine amplitude is set to 1 Vrms for

all frequencies. The test frequencies are listed below.

Test Frequencies

24 kHz

48 kHz

72 kHz

96 kHz

c) Press

[Sensitivity Up]

Set the sensitivity to 1 V.

[Ampl]

Use the knob to set the sine amplitude to 1.00 V.

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DSP TP104-plus Especificaciones Pagina 135