UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 6-gang FM stereo tuner heads

G0HZU_JMR · 26th Nov 2022, 11:05 pm

Here's some numbers to play with based on the Siglent datasheet. The spreadsheet below attempts to predict the SFDR at the settings shown in my previous post.

Based on the datasheet, this is what I'd expect to see from the Siglent analyser based on the datasheet info. You can see that I've deliberately set the input tone levels to -16.67dBm and this generates IMD tones (the green text) at the same level as the -90dBm DANL in a 10kHz RBW. The SFDR works out to be about 73dB.

26th Nov 2022, 11:05 pm	#281
G0HZU_JMR Dekatron Join Date: Sep 2010 Location: Cheltenham, Gloucestershire, UK. Posts: 3,077	Re: 6-gang FM stereo tuner heads Here's some numbers to play with based on the Siglent datasheet. The spreadsheet below attempts to predict the SFDR at the settings shown in my previous post. Based on the datasheet, this is what I'd expect to see from the Siglent analyser based on the datasheet info. You can see that I've deliberately set the input tone levels to -16.67dBm and this generates IMD tones (the green text) at the same level as the -90dBm DANL in a 10kHz RBW. The SFDR works out to be about 73dB. Attached Thumbnails __________________ Regards, Jeremy G0HZU