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

G0HZU_JMR · 27th Nov 2022, 12:46 am

Here's a demo using my HP8566B. I've warmed it up and performed the internal automated cal routine on it.

See below for a spreadsheet showing the settings and the predicted performance and also a screenshot.

The RBW is 10kHz, the attenuation is 10dB. The TOI appears to be about 11dBm. The noise floor appears to be about -100dBm in a 10kHz BW as expected. I've used the sample detector. This analyser has 1000 data bins across the span so it's OK to use the sample detector on this span and RBW setting.

You can see that the spreadsheet prediction and the analyser plot agree very well in terms of the IMD levels and the noise floor.

27th Nov 2022, 12:46 am	#283
G0HZU_JMR Dekatron Join Date: Sep 2010 Location: Cheltenham, Gloucestershire, UK. Posts: 3,077	Re: 6-gang FM stereo tuner heads Here's a demo using my HP8566B. I've warmed it up and performed the internal automated cal routine on it. See below for a spreadsheet showing the settings and the predicted performance and also a screenshot. The RBW is 10kHz, the attenuation is 10dB. The TOI appears to be about 11dBm. The noise floor appears to be about -100dBm in a 10kHz BW as expected. I've used the sample detector. This analyser has 1000 data bins across the span so it's OK to use the sample detector on this span and RBW setting. You can see that the spreadsheet prediction and the analyser plot agree very well in terms of the IMD levels and the noise floor. Attached Thumbnails __________________ Regards, Jeremy G0HZU