Vco Attenuation (20 Khz); Vco Attenuation (12.5 Khz) - Motorola CDM Series Basic Service Manual

4-10
4. Note the deviation obtained.
5. Adjust the slider, adjust the spin control or key in softpot values for the frequency point until the
deviation is within the range as defined in the Table 4-6 on page 4-9. Press ENTER to confirm the
selection.
6. Press the PTT Toggle button to dekey radio. Choose the next frequency, key up, then repeat
Steps 3-5 until all seven tuning points are completed.
7. Program the softpot value by pressing the Program button.
8. Exit the VCO attenuation 25 kHz function.

4.4.9 VCO Attenuation (20 kHz)

Note: Tuning of modulation balance attenuation and VCO attenuation for 25kHz channel
spacing must be accomplished first.
Perform the 20 kHz VCO attenuation procedure as follows:
1. Under the Tx Align menu, select VCO Attn. 20 kHz.
2. Press PTT Toggle to key up the radio at F7.
3. Inject 1 kHz at 800mVrms to the external microphone audio path.
4. Note the deviation obtained.
5. Adjust the slider, adjust the spin control or key in softpot values for the frequency point until the
deviation is within the range as defined in Table 4-6 on page 4-9. Press ENTER to confirm the
selection.
6. Press PTT Toggle to dekey the radio.
7. Program the softpot value by pressing the Program button.
8. Exit the VCO attenuation 20 kHz function.

4.4.10 VCO Attenuation (12.5 kHz)

Note: Tuning of modulation balance attenuation and VCO attenuation for 25kHz channel
spacing must be accomplished first.
Perform the 12.5 kHz VCO attenuation procedure as follows:
1. Under the Tx Align menu, select VCO Attn. 12.5 kHz.
2. Press PTT Toggle to key up the radio at F7.
3. Inject 1 kHz at 800mVrms to the external microphone audio path.
4. Note the deviation obtained.
5. Adjust the slider, adjust the spin control or key in softpot values for the frequency point until the
deviation is within the range as defined in the Table 4-6. Press ENTER to confirm the selection.
6. Press PTT Toggle to dekey the radio.
7. Enter the softpot value into the radio by pressing the Program button.
8. Exit the VCO attenuation 12.5 kHz function.
Radio Programming and Tuning Procedures