Motorola Cdm Series Basic 6881091c62 D Manual

Radio Programming and Tuning Procedures4-9
4.4.7 VCO Attenuation
Table 4-6: Deviation Specifications for UHF/VHF/LowBand Radios*
*These values are up-to-date as of the print date. For the latest values and procedures, refer to the 
Tuner online help.
4.4.8 VCO Attenuation (25 kHz)
Perform the 25 kHz VCO attenuation procedure as follows:
1. Under the Tx Align menu, select VCO Attn. 25 kHz.   
2. Begin with the lowest frequency.   Select the thumb of the slider at the lowest frequency point, 
then press...

4-10Radio Programming and Tuning Procedures
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....

Radio Programming and Tuning Procedures4-11
4.4.11 DTMF Deviation Tuning
This tuning option controls the dual-tone, multi-frequency (DTMF) deviation. 
Perform the DTMF deviation tuning procedure as follows:
1. Under the Tx Align menu, select DTMF Deviation.
2. Press PTT Toggle to key the radio up. Monitor the deviation obtained.
3. Adjust the slider, spin, or edit control until a deviation of 3.1-3.4 kHz is obtained. Press ENTER to 
confirm the selection.
4. Press PTT Toggle again to dekey the radio.
5....

4-12Radio Programming and Tuning Procedures
4.5.1 Front End Filter Tuning
The following values in Table 4-7 through Table 4-12 are up-to-date as of the print date. For the latest 
values and procedures, refer to the Tuner online help.Note:
1.  Tuning is normally not required. It should only be performed if a radio has poor 
sensitivity or pre-selector parts have been replaced. Radios are only tuned at one 
softpot frequency (See Table 4-7 through Table 4-12). The values for the untuned 
frequencies are...

Radio Programming and Tuning Procedures4-13
Table 4-9: Default Softpot Values for UHF (403-470 MHz/ 40W)
Table 4-10: Default Softpot Values for UHF (450-512 MHz/ 40W)
Table 4-11: Default Softpot Values for UHF (450-512 MHz/ 25W - VMOS)
Frequency Point Softpot Value (Decimal)
F163
F2 67
F375
F4 77
F581
F6 91
F7101
Frequency Point Softpot Value (Decimal)
F161
F2 65
F371
F4 85
F595
F6 101
F7109
Frequency Point Softpot Value (Decimal)
F161
F2 65
F371
F4 83
F595
F6 101
F7107 

4-14Radio Programming and Tuning Procedures
Table 4-12: Default Softpot for UHF (450-512 MHz/ 25W - LDMOS)
Perform the front end filter tuning procedure as follows:
1. Under the Rx Align menu, select the Front End Filter option.
2. Select the thumb of the slider of the frequency point given under “Frequency Point” for the radio’s 
frequency band from one of the Table 4-7 through Table 4-12. 
3. Inject a -87dBm RF signal with the frequency selected in Step 2, modulated with 1kHz tone at 
60% rated...

Radio Programming and Tuning Procedures4-15
*These values are up-to-date as of the print date. For the latest values and procedures, refer to the 
Tuner online help.
4.5.2 Rated Volume Tuning
Perform the rated volume tuning procedure as follows:
1. Under the Rx Align menu, select Rated Volume.
2. Inject a -47dBm rf signal modulated with 1 kHz tone at the 60% rated deviation listed in Table 4-
15.
3. Adjust the softpot value by using the slider, keying in the edit box (press ENTER to confirm the...

4-16Radio Programming and Tuning Procedures
4.5.3 Squelch Tuning
Perform the squelch tuning procedure as follows:
1. Under the Rx Align menu, select Squelch Atten. Select either Squelch Atten 12.5 kHz, 
Squelch Atten 20 kHz or Squelch Atten 25 kHz channel spacing variations. 
2. Apply an RF signal modulated with a 1 kHz tone at 60% rated deviation listed in Table 4-16 for 
current frequency point (F1 being the first) of 10dB SINAD. That is, adjust the reference signal 
level until 10dB SINAD is obtained...

Radio Programming and Tuning Procedures4-17
Manual Squelch Tuning:
1. Under the Rx Align menu, select Squelch Atten. Select either Squelch Atten 12.5 kHz, 
Squelch Atten 20 kHz or Squelch Atten 25 kHz channel spacing variations. 
2. Apply an RF signal modulated with a 1 kHz tone at 60% rated deviation listed in Table 4-16 for 
current frequency point (F1 being the first) of 10dB SINAD. That is, adjust the reference signal 
level until 10dB SINAD is obtained at the SINAD meter. Squelch tuning can either...

4-18Radio Programming and Tuning Procedures
Notes