Sine Flatness (Using Sine Output) - Racal Instruments 3155 User Manual

Sine Flatness
(Using Sine Out-
put)
Performance Verification 5-6
Remote Commands ::RES
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
ing
40e3
40e4
40e5
40e6
100e6
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
1.000 MHz
5.000 MHz
50.00 MHz
Level Flatness: 3dB to 100MHz (1V nominal output level)
Equipment: Oscilloscope
1. Configure the Model 3155 as follows:
Function:
Frequency:
Remote Commands: :RES
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.
:OUTP ON
:FUNC:MODE USER
:TRAC:DEF 4000
:TRAC:SEL 1
:FREQ:RAST 40e3
:VOLT 5
Frequency
4000 10Hz
4000 100Hz
4000 1kHz
4000 10kHz
1000 100kHz
HARMONICS LEVEL
< -55 dBc
< -40 dBc
< -25 dBc
Sine wave
1.000 kHz
:OUTP ON
:FREQ 10e3
3155 User Manual
Distortion Read-
< 0.05%
< 0.05%
< 0.05%
< 0.05%
< 0.05%