R.V.R. Electronica RX1-NV LCD, Руководство пользователя

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RX1-NV LCD
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USER MANUAL Rev. 1.2 - 13/12/01
f) A 50 W coaxial cable terminated with a couple of "N" connectors, to link the output
of the RF signal generator with the inpu of the receiver.
g) A 50 W coaxial cable terminated with a "BNC" connector on one side, and a
connector suitable for the signal input of the audio analyser on the other side.
h) Coaxial cables adapted for the signal connection between RF signal generator
and the audio signal generator/analyser.
The tuning procedure for the front-end is the following:
• Unscrew and remove both the receiver's covers
• Identify the RF fron-end with the help of figure 9-1
Figure 9-3
•
Identify the five variable capacitances that will be used (Figure 9-3): the
regulators 1,2,3 and 4 are on the bottom side of the receiver and have a screw-
like look; the regulator 5 is a SMD capacitance trimmer mounted on the internal
PCB and it is possible to operate on it with the proper screwdriver, without
opening the box, through a hole.
• Set the spectrum analyser center frequency to the receiver's new working
frequency, and the span shall be at least +/-10MHz.
•
Set the tracking signal generator of the spectrum analyser to have a RF output
power between -50dBm and -60dBm
•
• Connect the signal generator to the receiver's antenna connector.
•
In the receiver, disconnect the link between the RF front-end and the IF circuit.
Use the SMB connector of the front-end that is now free (6, Figure 9-3) to
connect it to the spectrum analyser. Switch on the receiver.
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