December, 2009
68009328001-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
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