04-02-2021, 08:21 PM
Without modulation, the RF signal would give "dead air", a quieting of the receiver. That "seems" to be what Patrick is implying.. Nothing wrong with dead air but without a tone an output meter or even an AVC response would be nil... I would have thought that Patrick would have mentioned the modulation and the choice of tones.
I do not own an HP and had to find an image of it to see if it could modulate. One can also select external modulation or none. If the button is depressed for EXTernal and there is no modulation into the appropriate port, like the output from an iPhone, same dead air.
The RF alone is still useful at tuning frequencies to zero beat against a received signal to verify calibration...
Nice, stable instrument, unlike my old tube stuff I have to chase up/down the band when the line voltage changes.. chas
I do not own an HP and had to find an image of it to see if it could modulate. One can also select external modulation or none. If the button is depressed for EXTernal and there is no modulation into the appropriate port, like the output from an iPhone, same dead air.
The RF alone is still useful at tuning frequencies to zero beat against a received signal to verify calibration...
Nice, stable instrument, unlike my old tube stuff I have to chase up/down the band when the line voltage changes.. chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
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