Tune up

FCC ID: NEOCCE-470N3

Parts List/Tune Up Info

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FCCID_304731

                     Tune Up or Gain Adjustment Procedure

This is the procedure to show how to adjust the gain for each channel from each
individual module. The frequency and filter has been set and tuned from the manufacturer
when it was built. Any frequency or bandwidth change will need to send back to the
manufacturer to adjust it.

There are two sets of 1 dB step of attenuator with total 30 dB range adjustment in the
back of each channel module. The attenuator can adjust the output level for each
individual channel module to choose a level to combine with other channels.

The two sets of attenuator and each set have four identical switches, the first switch is
indicated 1 dB, the second switch is indicated 2 dB, the third switch is indicated 4 dB and
the fourth switch is indicated 8 dB.

When the switch is toggled up, the attenuation will increase according to the indicated
value. For example, the 1 dB switch is up and the attenuation is 1 dB so the output level
will decrease 1 dB. When 1 dB and 2 dB switches both are up, the attenuation is 3 dB so
the output level will decrease 3 dB. These four switches can make the combination from
1 dB to 15 dB. When combines all 8 switches together, it will get 1 dB to 30 dB ranges.



Document Created: 2019-11-01 10:43:10
Document Modified: 2019-11-01 10:43:10

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