Other graphs are available:

An image of the very inexpensive USB tuner that is in use. This is based on a Silicon Labs front end and USB interface.

The tuner shows up like this in Linux

		[3661068.170532] usb 4-1: new full-speed USB device number 3 using ohci-pci
		[3661068.337640] usb 4-1: New USB device found, idVendor=06e1, idProduct=a155
		[3661068.337653] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
		[3661068.337660] usb 4-1: Product: ADS InstantFM Music
		[3661068.337666] usb 4-1: Manufacturer: ADS TECH
		[3661068.349624] radio-si470x 4-1:1.2: DeviceID=0x1242 ChipID=0x0a0f
		[3661068.351639] radio-si470x 4-1:1.2: software version 1, hardware version 7