Cisco Cisco Digital Service Access Node (DSAN) 8210 Guia De Resolução De Problemas
RF Level Setup
4032301 Rev A
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After power is applied, the DSAN takes about 4 minutes to boot completely. No
analog channels are present at this step until the unit has booted completely.
analog channels are present at this step until the unit has booted completely.
6 Monitor the output levels of all active channels between 585 MHz and the upper
frequency limit of the plant.
a Note the highest and lowest signal levels over that frequency range.
b Add together the highest and lowest signal levels noted above, and then
a Note the highest and lowest signal levels over that frequency range.
b Add together the highest and lowest signal levels noted above, and then
divide the result by 2.
c Use the resulting average value as the reference digital channel signal level.
7 Measure and note the output signal level of Channel 2 (55.25 MHz) at the Mixed
Services output port (Port 3) test point (FWD OUT -20 dB TP). Use this value as
the reference analog channel signal value for the next step.
Note: The Channel 2 output signal level should be approximately 20 dBmV. A
lower level could be evidence of an incomplete boot or unmodulated carriers
(+14 dBmV out).
the reference analog channel signal value for the next step.
Note: The Channel 2 output signal level should be approximately 20 dBmV. A
lower level could be evidence of an incomplete boot or unmodulated carriers
(+14 dBmV out).
8 Confirm that the reference analog channel signal level found above is 6 dB
greater than the reference digital channel signal level found above. If necessary,
adjust the FWD IN PAD value to achieve 6 dB difference between the reference
analog and digital signal levels.
adjust the FWD IN PAD value to achieve 6 dB difference between the reference
analog and digital signal levels.
Optional Forward Path Downstream Signal (Port 2)
For optional downstream use, this port replicates the input signal at Port 1. The
signal level is -9 dB relative to the signal level at the Input port. This signal level is
not internally adjustable.
signal level is -9 dB relative to the signal level at the Input port. This signal level is
not internally adjustable.