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überarbeitet am 21.10.2010
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If You have followed the first few steps, connection of power supply, antenna
and a loudspeaker or some headphones, at least a noise should be audible from the set.
After tuning to 6 0 7 5 kHz respectively 6.075 MHz, the German External Service
"Deutsche Welle" should be audible (at least, if You live in central Europe).
With the rotary tuning knob, You can tune in to the desired frequency.
In semiprofessional receivers, You have usually the possibility to chose a
convenient tuning speed, some sets increase the tuning steps if You turn the
tuning knob faster (called electronic flywheel). In the NRD-535, You can switch
to the next 1 MHz - segment using the Up/down - pushbuttons, other receivers
have a rotary switch for the 1 MHz segments.
Some receivers allow jumping to the next amateur or broadcast band using a
MB (meter band) - pushbutton.
| 5 |
The signal-strength meter indicates the field-strenght
of the signal You have tuned in, it is a help for optimal tuning to it's frequency.
The best signal strength meters (S-Meters) display signal strength in S-units from
1 - 9 and above that in dB over S9, for example 9+20dB, 9+40dB, 9+60dB.
Many receivers provide only a rudimentary estimation indicator with 1-5 or 1-10 scales.
But a signal-strength meter with optimal step readings can indicate a field strength
lower or usually higher then reality, depending upon the indicator amplifier.
A minimal variant found in travel radios is a red light emitting diode glowing
during reception of a station with an acceptable signal strength (say, You just could
use Your ears for this task...) |
| 6 |
The frequency display can be implemented
as analog dial with a pointer and dial marks or - an absolute "must" for all
contemporary receivers - as a digital display. It's resolution is usually
between 1 kHz and 1 Hz. |
| 7 |
The tone control, in some set You might
find even separate treble and bass controls, let's You optimize the audio
response to improve the signal, so You can get out most intelligable
audio out of the loudspeaker. With most communications receivers, en external
loudspeakers or high-quality headphones are indispensable for optimal intelligibility.
In some sets, You find small monitor speakers, so You can test the basic functioning
of the receiver without an external speaker. |
Now You should hear the "Deutsche Welle" booming out of the speaker.
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