HP 33120A User's Guide
HP 33120A User's Guide
HP 33120A User's Guide
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Chapter 7 Tutorial<br />
Modulation<br />
• Set the modulation frequency to 555.555 Hz.<br />
• Set the carrier frequency to (Max F + Min F) / 2 = 7.784750 MHz.<br />
• Set deviation (pk) frequency to (Max F – Min F) / 2 = 7.215250 MHz<br />
• Create and download a nine-segment arbitrary waveform with the<br />
values shown below. Each segment is 250 points long (2250/9) for a<br />
total of 2,250 points. Use the DATA VOLATILE command download to<br />
achieve 12-bit frequency resolution for each point.<br />
y = mX + b<br />
“y” is the new vertical value.<br />
“m” = 1 / Deviation<br />
“X” is the original frequency point.<br />
“b” = – carrier frequency / Deviation = 1.078930044<br />
Segment<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
9<br />
Value<br />
+1.0000<br />
-0.9402<br />
+0.2765<br />
+0.6362<br />
-1.0000<br />
-0.5829<br />
-0.9569<br />
-0.9897<br />
+0.3389<br />
To Check: Enable FM by sending the following commands:<br />
"FM:STATE ON"<br />
"FM:INT:FREQ 555.555"<br />
"DIAG:PEEK? 0,0,0"<br />
enter results < Prescale# (S) > , < Points (P) ><br />
296
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