Performance Verification
4-25 Pulse Modulation Tests with the Sampling Oscilloscope
MG362x1A MM
PN: 10370-10386 Rev. B
4-87
Overshoot
3.
Set up the oscilloscope as follows:
a.
Select the
Time/Delay
button on the bottom of the display.
b.
Set the sweep time to 120 ns/div and the delay to 4
s. Select
Close
to close the window.
c.
Press the
Clear Display
key. Allow the oscilloscope to sample the signal and wait for a clearly
defined waveform to appear on the display.
d.
Select the
Amplitude
button, then the
Overshoot
button (on the left hand side of the display).
4.
Read the measured result from the bottom of the display and enter the result in the test record.
5.
Repeat steps 1b through 7 for each frequency listed in the test record.
Pulse Power Accuracy
The following procedure lets you measure the pulse power accuracy of the MG362x1A’s pulse modulated RF
Output. The accuracy is tested with a 1
s and a 0.5
s pulse width.
1.
Disconnect the MG362x1A’s RF coaxial cable from the front of the unit. Set up the equipment as
described in
. Perform steps 1 to 6 in
2.
For models without internal pulse, set up the Function Generator as follows:
a.
Turn the Function Generator off, then back on to reset the instrument.
b.
Press the
key to select the square wave function.
c.
Press the
Freq
key, then the green
Enter Number
key and enter 250 kHz.
d.
Press the blue
Shift
key, then the
%Duty Cycle
key and use the rotary knob to adjust the duty
cycle to 25%.
e.
Press the
Ampl
key, then the green
Enter Number
key and enter 2.2 V
p-p
.
f.
Press the
Offset
key, then the green
Enter Number
key and enter 1.1 VDC.
3.
Set up the MG362x1A as follows:
a.
Reset the instrument by pressing
SYSTEM
, then
Reset
. After reset, the CW menu is displayed.
b.
Turn RF output OFF.
c.
Press
FREQUENCY
to open the current frequency parameter for editing.
d.
Set F1 to the first/next applicable frequency in the test record.
e.
Press
Level
to open the current power level parameter for editing.
f.
Set L1 to the maximum specified leveled output power level for the instrument being tested
(refer to Appendix B, Technical Data Sheet).
g.
Connect a fixed attenuator with the proper attenuation value (refer to
) to the
MG362x1A
RF Output
and then connect the RF coaxial cable from the
Channel 1 Input
of the
Oscilloscope to the fixed attenuator.
Table 4-27.
MG362x1A Attenuation
MG362x1A Rated Power
Required Attenuation
18 dBm
20 dB
13 dBm
10 dB
10 dBm
6 dB
8 dBm
3 dB
<8 dBm
0 dB
Summary of Contents for Rubidium MG362 1A Series
Page 12: ...Contents 10 PN 10370 10386 Rev B MG362x1A MM ...
Page 16: ...1 9 ESD Requirements General Information 1 4 PN 10370 10386 Rev B MG362x1A MM ...
Page 30: ...2 6 RF Deck Assemblies Functional Description 2 14 PN 10370 10386 Rev B MG362x1A MM ...
Page 66: ...3 11 FM and Phase Modulation Calibration Calibration 3 36 PN 10370 10386 Rev B MG362x1A MM ...
Page 292: ...B 5 Self Test Messages Instrument Messages B 8 PN 10370 10386 Rev B MG362x1A MM ...
Page 293: ......