Racal Instruments 3155 Spezifikationen PDF herunterladen (Seite 191)

3155 User Manual

Performance Verification 5-6

Remote Commands ::RES

:OUTP ON

:FUNC:MODE USER

:TRAC:DEF 4000

:TRAC:SEL 1

:FREQ:RAST 40e3

:VOLT 5

Using WaveCAD 6.x, change the axis (Setup | Axis) to have

4000 points (0 to 3999) for the first 4 steps below and 1000

points (0 to 999) for step 5 below. Download a 1k or 4k sine

waveform (Wave | Sine | OK) into segment 1.

FREQ:RAST # of Points Frequency Distortion Read-

ing

40e3 4000 10Hz < 0.05%

40e4 4000 100Hz < 0.05%

40e5 4000 1kHz < 0.05%

40e6 4000 10kHz < 0.05%

100e6 1000 100kHz < 0.05%

4. Tune the spectrum analyzer to the carrier frequency and

adjust the gain so the fundamental corresponds to 0 dB.

5. Connect the Model 3155 output to spectrum analyzer

input through a 20dB feedthrough attenuator.

6. Set the Model 3155 FREQ setting and verify the har-

monic distortions levels as follows:

FREQ SETTING HARMONICS LEVEL

1.000 MHz < -55 dBc

5.000 MHz < -40 dBc

50.00 MHz < -25 dBc

Sine Flatness

(Using Sine Out-

put)

Level Flatness: 3dB to 100MHz (1V nominal output level)

Equipment: Oscilloscope

1. Configure the Model 3155 as follows:

Function: Sine wave

Frequency: 1.000 kHz

Remote Commands: :RES

:OUTP ON

:FREQ 10e3

2. Connect the Model 3155 Sine Output to the oscillo-

scope, set the oscilloscope input impedance to 50O, and

set the oscilloscope to display the sinewave within ex-

actly 10 vertical divisions.

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