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User Manual

ManualsBrandsSimoco EMEA ManualsElectronics100W SB2025NT/ Atlas 4100 / Atlas 4200
61626364656667686970
SGD-SB2025NT-TUM, Part 1
Jan 12 Page 50 ALIGNMENT & TESTING
41.5.3. Select the ‘OK’ button to accept the changes made and close the Channel Edit
screen.
41.6. On the MxTools Channel screen, on the dynamic tool bar, select ‘Write Channel’ button
to save the changes made to the radio.
42. Repeat Para 41 to Para 41.6 for all the configured channels.
43. On the NI ET, on the NI Engineering window, carry out the following:
43.1. On the Facilities tab, set the ‘Test Tone’ to a frequency of 1011 Hz and to a level of
−4.4 dB. Set the Route to ‘External’.
43.2. Select the ‘Apply’ button.
44. On the MxTools Channel screen, select one of the configured channels and carry out the
following:
44.1. On the MxTools Channel screen, select the ‘Set Software Channel To’ tick button.
44.2. On the RTS, carry out the following:
44.2.1. Check that it is set to Auto tune or re-tune to the require frequency.
44.2.2. Check that the deviation of the 1011 Hz tone is 1.5 kHz.
45. Repeat Para 44 to Para 44.2.2 for all the configured channels.
Note.
After successful completion of the above procedure, the ‘Ref Osc Level (LF Audio)’
digital potentiometer slider should be at approximately the same level on all channels.
The ‘VCO Level (VF Audio)’ digital potentiometer slider will be set lower on higher
frequency channels as the SB2025 produces greater modulation on higher
frequencies. The deviation should be the same on all channels with a constant level in
from the NI.
6.1.10 Mute Threshold Setting
The Mute Threshold Setting RV6 is used to set the level at which the mute opens.
Procedure
1. On the MxTools main screen, on the tool bar, select the ‘Remote’ icon. The Remote screen
will be displayed.
2. On the Remote screen, select the Mute Control ‘Open’ button to force the mute open.
3. Inject the correct RF frequency into the Rx for the test channel.
4. Set the Rx modulation frequency to 1 kHz at nominal deviation.
5. Alter the amplitude of the RF signal until the Rx audio has an 8 dB Signal to Noise and
Distortion (SINAD).
6. On the MxTools Remote Screen, select the Mute Control ‘Normal’ button to set the mute
back to normal.