Cisco Cisco Digital Service Access Node (DSAN) 8211 Troubleshooting Guide

 

4032301 Rev A 

23 

 

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. 

 

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 

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). 

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. 

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.