Cisco DNCS System Release 2.8 3.8 4.3 Installation Guide

 

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4031324 Rev B 

After installing the QPSK software on the DNCS, your next step is to upgrade the 
QPSK modulators.  

When you reset a QPSK modulator, the DNCS downloads the new QPSK software to 
the QPSK modulator and, if needed, to the QPSK demodulator(s). Follow the 
instructions in this section to download the QPSK software to the QPSK modulators.  

Important: We recommend that when you are downloading software to the QPSKs, 
begin with a test hub or a QPSK with the smallest DHCT population, so that you can 
confirm the system configuration without affecting subscribers. 

Perform the procedures in this section for each QPSK being upgraded. 

 

If your QPSK modulators are located nearby, complete the following steps to 
download the new software to the QPSK modulators. 

Important: The following procedure contains steps that are time-sensitive. Read all 
of the procedure before beginning so that you are prepared to leave the modulator 
powered off for the proper amount of time. Failure to do so may affect whether or 
not QPSK database information persists. 
1  Power off the QPSK modulator and any associated demodulators.  
2  Do you want the information in the database to persist? 

If yes, wait a few seconds, and power on the modulator only.   

If no, wait at least 5 minutes, and then power on the modulator only. 

If your system release does not support QPSK database persistence, or if 
QPSK database persistence is not turned on for this modulator, wait a few 
seconds, and power on the modulator only. 

3  Wait until the power-on self-test sequence is completed and the LCD shows the 

power-on self test information. This process may take up to 10 minutes.  

4  Press the Status button on the front panel of the QPSK modulator until the LCD 

displays STATUS: Software Version.