Hi all,
I have a signal which I need to measure during fabrication. The signal is a 2.88 MHz crystal and I need to know the signal level and frequency.
A scope is a great device to do this but I really only need a display with frequency and signal level.
A frequency counter would do the trick for the frequency measurement but can not locate one of these with a signal level indication.
Any thoughts?
pdrunen
Signal strength < 15dBm ?
This would work fine assuming you can use the low-impedance input. Otherwise, use a scope.
snipped-for-privacy@aol.com wrote in news: snipped-for-privacy@g47g2000cwa.googlegroups.com:
Get a spectrum analyzer like a TEK 2712/2714 that incorporates an accurate freq. counter. It will also show the purity of your signal.
PDRUNEN You could use a shortwave receiver locked onto or near the frequency, use the BFO or SSB mode to beat against the signal. A PC soundcard could measure the frequency error. If you need to know what direction the error is, tune lower by 1.0 KHz and measure the difference frequency, if it goes below 1 KHz the crystal is drifting low, higher than 1 KHz, it is drifting high etc.
Some receivers have software signal strength meters that can be calibrated to give you a signal level indication.
Look at some of the ICOM receivers for PC CIV control.
Joe
snipped-for-privacy@aol.com wrote:
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