Dtmf Deviation Tuning; Figure 5-7. Dtmf Deviation Tuning Window; Table 5-4. Deviation Specifications - Motorola Commercial Series Basic Service Manual

5-10
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
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.
December, 2009

Table 5-4. Deviation Specifications

Band
UHF/VHF
UHF/VHF
UHF/VHF

Figure 5-7. DTMF Deviation Tuning Window

Radio Alignment Procedures: Transmitter Alignment Options
Channel Spacing
25 kHz
12.5 kHz
20 kHz
(Figure 5-7).
Deviation (kHz)
4.40 - 4.60
2.20 - 2.30
3.40 - 3.60
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