Squelch Threshold Level; S-Meter Calibration - Yaesu FTM-400DR/DE Technical Supplement

Squelch Threshold Level

1. Set the RF signal generator to 440.050 MHz. Set
the generator for ±3.5 kHz deviation of a 1 kHz
modulation tone, and set the RF output level
from the signal generator to -12 dBμV.
2. Set the transceiver frequency to 440.050 MHz.
3. Press the [ D ( X )] key to select "FM".
4. Press the [ P1 ] key of the Microphone to set the
alignment menu Item to "Adj 09 SQL/A".
5. Press the [ P3 ] key to save the new setting.
6. Increase the output level of the signal genera-
torup to -4 dBμV.
7. Press the [ P4 ] key to save the new setting.
8. Set the transceiver and RF signal generator fre-
quency to 146.050 MHz.
9. Increase the output level of the signal genera-
torup to -12 dBμV.
10. Press the [ P3 ] key to save the new setting.
11. Increase the output level of the signal genera-
torup to -4 dBμV.
12. Press the [ P4 ] key to save the new setting.
13. Press the [ P2 ] key of the Microphone to set the
alignment menu Item to "Adj 09 SQL/B".
14. Set the RF signal generator to 440.050 MHz. Set
the generator for ±3.5 kHz deviation of a 1 kHz
modulation tone, and set the RF output level
from the signal generator to -12 dBμV.
15. Set the transceiver frequency to 440.050 MHz.
16. Press the [ D ( X )] key to select "FM".
17. Press the [ P3 ] key to save the new setting.
18. Increase the output level of the signal genera-
torup to -4 dBμV.
19. Press the [ P4 ] key to save the new setting.
20. Set the transceiver and RF signal generator fre-
quency to 146.050 MHz.
21. Increase the output level of the signal genera-
torup to -12 dBμV.
22. Press the [ P3 ] key to save the new setting.
23. Increase the output level of the signal genera-
torup to -4 dBμV.
24. Press the [ P4 ] key to save the new setting.

S-Meter Calibration

1. Set the RF signal generator to 440.050 MHz. Set
the generator for ±3.5 kHz deviation of a 1 kHz
modulation tone, and set the RF output level
from the signal generator to -5 dBμV.
2. Set the transceiver frequency to 440.050 MHz.
3. Press the [ D ( X )] key to select "FM".
4. Press the [ P1 ] key of the Microphone to set the
alignment menu Item to "Adj 08 SM/A".
5. Press the [ P3 ] key to save the new setting.
6. Increase the output level of the signal genera-
torup to +23 dBμV.
7. Press the [ P4 ] key to save the new setting.
8. Set the transceiver and RF signal generator fre-
quency to 146.050 MHz.
9. Increase the output level of the signal genera-
torup to -5 dBμV.
10. Press the [ P3 ] key to save the new setting.
11. Increase the output level of the signal genera-
torup to +23 dBμV.
12. Press the [ P4 ] key to save the new setting.
13. Press the [ P2 ] key of the Microphone to set the
alignment menu Item to "Adj 09 SM/B".
14. Set the RF signal generator to 440.050 MHz. Set
the generator for ±3.5 kHz deviation of a 1 kHz
modulation tone, and set the RF output level
from the signal generator to -5 dBμV.
15. Set the transceiver frequency to 440.050 MHz.
16. Press the [ D ( X )] key to select "FM".
17. Press the [ P3 ] key to save the new setting.
18. Increase the output level of the signal genera-
torup to +23 dBμV.
19. Press the [ P4 ] key to save the new setting.
20. Set the transceiver and RF signal generator fre-
quency to 146.050 MHz.
21. Increase the output level of the signal genera-
torup to -5 dBμV.
22. Press the [ P3 ] key to save the new setting.
23. Increase the output level of the signal genera-
torup to +23 dBμV.
24. Press the [ P4 ] key to save the new setting.
ALIGNMENT-6
Alignment
FTM-400DR/DE Technical Supplement