Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Manuel d'utilisateur télécharger pdf (Page 41)

MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | MAINTENANCE GUIDE

Chapter 5: Codan Radio System Testing Page 33

On the IFR 2975, recall Codan setup 4 (Rx_PreTune) from your internal drive. Enter the correct RF

frequency and ensure the receiver is turned on. In the “Trace” box on the right hand side of the screen

click on the “Run” button. The ﬁ lter waveform should appear as shown in Figure 5-17. Click on Options

then Conﬁ gure Markers to add optional markers to the spectrum analyzer if desired.

Figure 5-17: Receiver RF Preselector on the Spectrum Analyzer

To tune the RF Preselector ﬁ lter, remove the dust caps on the variable capacitors and, starting from

the capacitor closest to the front panel of the receiver and moving back, tune the ﬁ lter to its new

frequency.

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Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Manuel d'utilisateur Page 41