Changing downstream frequency

Hi.  I have a Zoom 5354 modem/router and I would like to change the downstream frequency in an attempt to get better performance and fewer disconnections.  I thought it was as easy as entering the frequency and clicking the TUNE button on the Status/Connection page, but that is not the case.  Is it because Channel 1 is "locked"?  How would I unlock it?  Thanks in advance!  J

Startup Procedure

Procedure Status Comment
Acquire Downstream Channel 729000000 Hz Locked

Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 177 729000000 Hz 0.5 dBmV 43.2 dB 0 0
2 Locked QAM256 178 735000000 Hz 2.7 dBmV 43.9 dB 0 0
3 Locked QAM256 179 741000000 Hz 1.9 dBmV 43.1 dB 0 0
4 Locked QAM256 180 747000000 Hz -0.3 dBmV 43.0 dB 0 0
5 Locked QAM256 181 753000000 Hz 3.3 dBmV 43.2 dB 0 0
6 Locked QAM256 182 759000000 Hz 4.2 dBmV 43.9 dB 0 0
7 Locked QAM256 183 765000000 Hz 2.3 dBmV 43.3 dB 0 0
8 Locked QAM256 184 771000000 Hz 4.2 dBmV 43.8 dB 0 0

Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 2 5120 Ksym/sec 32300000 Hz 57.0 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

Downstream Frequency Select                 TUNE
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