Motorola PR400 - Manual (Page 42)

August, 2004 6881096C24-A
5-8 Radio Alignment Procedures: Transmitter Alignment Options
3. Adjust the power level to be as defined by country power level specifications by moving the
slider/spin control or keying in values in the edit control (press ENTER to confirm your selection
after typing in the softpot value).
4. Press PTT Toggle to dekey the radio, go to the next frequency point by selecting the slider, typing
in the edit control box (press ENTER to confirm your selection) or toggling the softpot value using
the spin control.
5. Press PTT Toggle again to key up the radio at the selected frequency point.
6. Repeat steps 3-5 for the remaining test frequencies (F2-F7).
7. Press Program to store the softpot values into the radio’s codeplug.
8. Exit the Transmit Low Power function.
5.4.4 VCO Attenuation
Note: Modulation Balance Tuning must be done first. The Transmit Deviation Limit softpot
sets the maximum deviation of the carrier. Tuning is performed for all (12.5 kHz, 20
kHz and 25 kHz) channel bandwidths. Tuning for 25 kHz channels must be done first
for all frequency points. Tuning for 12.5 and 20 kHz channels determines only the off-
set to the previously tuned deviation for 25 kHz tuning channel spacing. For 12.5, and
20kHz channels, only the last non-0 transmit frequency point (normally F7) is used
for tuning. The 30 kHz channel bandwidths that use 5.0 kHz maximum system devia-
tion are covered by the 25 kHz tuning.
When using test box RLN4460:
• Set the METER OUT toggle switch to the “MIC PORT” position
• Set the METER OUT selector switch to "MIC”.
• Inject a 1 kHz tone with the levels given below for each radio model to AUDIO IN.
• Measure the level at the radio input at the AC/DC meter.
Figure 5-6. VCO Attenuation Window (12.5 kHz)