Motorola EP450 service manual Dtmf Deviation Tuning, Under Tx Align, select Dtmf Deviation Figure

Radio Alignment Procedures: Transmitter Alignment Options 5-9

5.4.5DTMF Deviation Tuning

This tuning option controls the Dual Tone Multi-Frequencydeviation. Please note that Modulation Balancing and VCO Attenuation have to be performed prior to this tuning operation. Not doing so will result in the wrong deviation value being obtained while tuning the DTMF.

Figure 5-7. DTMF Deviation Tuning Window

1.Under Tx Align, select DTMF Deviation (Figure 5-7).

2.Press PTT Toggle to key the radio. Monitor the deviation obtained.

3.Adjust the slider, spin or edit control (press ENTER to confirm your selection/send a softpot value) until a deviation of 3.1-3.4 kHz is obtained.

4.Press PTT Toggle again to dekey the radio.

5.Program the softpot value into the radio by pressing Program.

6.Exit the DTMF Deviation function.

HKLN4215A December 3, 2003