Motorola PR400 - Manual (Page 44)

August, 2004 6881096C24-A
5-10 Radio Alignment Procedures: Transmitter Alignment Options
Table 5-4. Deviation Specifications
5.4.5 DTMF Deviation Tuning
This tuning option controls the Dual Tone MultiFrequency deviation. 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.
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.
Band Channel Spacing Deviation (kHz)
UHF/VHF 25 kHz 4.40 - 4.60
UHF/VHF 12.5 kHz 2.20 - 2.30
UHF/VHF 20 kHz 3.40 - 3.60
Figure 5-7. DTMF Deviation Tuning Window