Front Panel Operation
Publication 31231, Rev. J, October 2003
2-47
2.3.20
External Pulse Modulation
(Series 12500A/12700A Only)
Active High (Positive-going)/Active Low (Negative-going)
Press
[PM]
to select the modulation parameter. Refer to the modulation parameters and specifications
in Chapter 1 for detailed information.
Figure 2-28: Pulse Modulation Selection
Using Pulse Modulation
The Pulse Modulation function allows controlling the instrument RF output with a high speed high on/off ratio
level shift (on/off keying). During pulse operation, the RF output will be attenuated from the set level by at
least 80 dB when the pulse is ‘off’.
Polarity
This parameter determines which polarity of the input signal produces an RF output. Setting the parameter to
‘Active High’ means that the RF will be on when the input signal is a TTL high.
Enabling FM
There is a softkey to allow turning PM on and off. When PM is off, the key label will read “Turn PM On”.
When PM is on, the key will read “Turn PM Off”. The LED next to the front panel PM button will illuminate when
PM is on.
Summary of Contents for Series 12000A
Page 3: ...DECLARATION OF CONFORMITY ...
Page 4: ......
Page 11: ...Preface Publication 31231 Rev J October 2003 vii ...
Page 14: ...Series 12000A Microwave Synthesizers x Publication 31231 Rev J October 2003 ...
Page 18: ...Series 12000A Microwave Synthesizers xiv Publication 31231 Rev J October 2003 ...
Page 20: ...Series 12000A Microwave Synthesizers xvi Publication 31231 Rev J October 2003 ...
Page 22: ...Series 12000A Microwave Synthesizers xviii Publication 31231 Rev J October 2003 ...
Page 24: ...Series 12000A Microwave Synthesizers xx Publication 31231 Rev J October 2003 ...
Page 62: ...Series 12000A Microwave Synthesizers 1 38 Publication 31231 Rev J October 2003 ...
Page 234: ...Series 12000A Microwave Synthesizers B 2 Publication 31231 Rev J October 2003 ...
