When I want to use reconstruction filters other than 250 kHz, 2.5 MHz, and 8 MHz, what should I do?
You can use external filters instead of those preset filters (250 kHz, 2.5 MHz, and 8 MHz) to prevent the unwanted image spurious.
- Set the internal baseband generator of the ESG to output the ARB waveform you want to use; set ARB to On.
- Set the Reconstruction Filter to Through so that the baseband signal's bandwidth is not limited.
- Insert external low-pass filters between the I and Q Output’s on the rear panel of ESG and the I and Q inputs on the front panel to limit the baseband bandwidth.
- Set the I/Q Source to Ext I/Q in [I/Q] key menu.
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