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Chpater 6 161
Custom Arb Waveform Generator
Working with Modulation Types
Differential Wideband IQ (Option 016)
The signal generator with Option 016 can use an external I/Q modulation source such as a two
channel arbitrary waveform generator to generate up to 2 GHz modulation bandwidth at RF. To
enable the wideband I/Q inputs:
1. Press the front panel
I/Q hardkey.
2. Press
I/Q Off.
3. Press
I/Q Path Wide (Ext Rear Inputs).
4. Press
I/Q On.
Connect the external I/Q modulation source to the signal generator’s rear panel, differential
WIDEBAND I/Q INPUTS. The voltage level at the inputs is +/– 1 Vdc. Wideband IQ is available for RF
above 3.2 GHz. Refer to the Data Sheet for more information.
It is possible to use the signal generator’s internal arbitrary waveform generator (ARB) as a baseband
source while using the wideband inputs at RF. The internal ARB I and Q signals are available at the
I and Q OUT and the I-bar and Q-bar OUT rear panel connectors. Use the following steps to set up
the internal ARB as a baseband source and enable the wideband inputs.
1. Set up the internal baseband generator with the desired signal.
2. Press the
Mux hardkey.
3. Press
I/Q Out.
4. Press
BBG1
5. Press the front panel I/Q hardkey.
6. Press
I/Q Off.
7. Press
I/Q Path Wide (Ext Rear Inputs).
8. Press
I/Q On.
Single-Ended Wideband IQ (Option 015 - Discontinued)
The signal generator with Option 015 can use an external I/Q modulation source such as a two
channel arbitrary waveform generator to generate up to 2 GHz modulation bandwidth at RF. To
enable the wideband I/Q inputs:
1. Press the front panel
I/Q hardkey.
2. Press
I/Q Off.
3. Press
I/Q Path Wide (Ext Rear Inputs).
4. Press
I/Q On.
Connect the external I/Q modulation source to the signal generator’s rear panel WIDEBAND I INPUT
and WIDEBAND Q INPUT. The voltage level at the inputs is +/– 1 Vdc. Wideband IQ is available for
RF above 3.2 GHz. Refer to the Data Sheet for more information.
It is possible to use the signal generator’s internal arbitrary waveform generator (ARB) as a baseband
source while using the wideband inputs at RF. The internal ARB I and Q signals are available at the
I and Q OUT and the I-bar and Q-bar OUT rear panel connectors. Use the following steps to setup