Static Adjustment Of An A.m. Receiver - Philips PM5324 Instruction Manual

2.3.3. 1 . Checking and adjusting the band·pass curve of a.m. receivers
Fig. 1 1. Static adjustmen t of an AM receiver
2.3.3. 1 . 1 . I.F. band-pass filters
- Connect the h.f. output of the P M 5324 to the connection point i ndicated in the trimming table of the
receiver via a 30 nF
- Adjust the freque ncy of generator P M 5324 to the intermediate frequency of the receiver.
- The output voltage should be as large as possible.
- Tune the receiver to the short wave end.
- Set the receiver to medium wave.
the receiver has a ferrocepter, short-circu it the medium·wave ferrocepter coil.
- If
- Screw out the cores or trimmers of the i.f. band filters (note the trimming table of the documentation).
- Adjust the adjusting e l ements of the i.f. band·pass filters so that the connected i ndicator shows maximum
deflection, in the sequence i ndicated in the trimming table.
2.3. 3. 1 .2. I. F. rejector and absorption circuits
- Con nect the h.f. output of the generator to the aerial input of the receiver via the dummy aerial of Fig. 8.
- Adjust the output voltage of the ge nerator to maximum.
- Switch the receiver to medium wave.
- If the receiver has a ferrocepter, short-circuit the medium wave ferrocepter coi l.
- Screw out the cores of the i.f. rejector· and absorptio n circuit.
- Adjust the cores so that the indication shows minimum deflection.
2.3. 3. 1 .3. R F and oscillator circuits
- Connect the h.f. output of the ge nerator to the aerial input of the receiver via the dummy aerial of Fig. 8.
- Set the receiver to the wave range to be adjusted.
- Tune the receiver and the generator to the frequency to be adjusted.
- Adjust the cores and/or trimmers of r.f. and oscillator circuits to maximum deflectio n of the i ndicator.
- If necessa ry, repeat the adjustin g procedu re for every wave range at the long- and short wave e
capacitor.
RF OUT
MA8211
nd.
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