45
Installing the 7781CM in the Field
Deploying the 7781CM
Checking the Signal Level with an RF Power Meter
(Optional)
The 7781-CM cable modem is just like the standard DOCSIS 3.0 modem installed at home.
1.
Connect an RF power meter to the cable from the cable power tap.
2.
Select a CATV power passing tap that supplies a signal level between
-12 and +16
dBmV
at its output (prefer 0 to 6 dBmV).
lists the signal level specifications at Connector B of the 7781CM.
3.
When done checking the signal level, connect the tap's output cable to the 7781CM's
Connector B.
You have checked the cable power tap signal level to the 7781CM. Continue with
. Continue with
Connecting and Sealing the RJ-45 Cable (Optional)
or
, as required.
Table 10. Connector B signal level specifications
Downstream
Upstream
-12 to +16dBmV/64 QAM
TDMA: (1xUpstream)
• Pmin to +57dBmV (32 QAM, 64 QAM)
• Pmin to +58dBmV (8 QAM, 16 QAM)
• Pmin to +58dBmV (QPSK)
S-CDMA: (1xUpstream)
• Pmin to +56dBmV (all modulations), where:
– Pmin = +17dBmV, 1280kHz modulation rate
– Pmin = +20dBmV, 2560kHz modulation rate
– Pmin = +23dBmV, 5120kHz modulation rate
TDMA: (4xUpstream)
• Pmin to +51dBmV (32 QAM, 64 QAM)
• Pmin to +52dBmV (8 QAM, 16 QAM)
• Pmin to +55dBmV (QPSK)
S-CDMA: (4xUpstream)
• Pmin to +53dBmV (all modulations), where:
– Pmin = +17dBmV, 1280kHz modulation rate
– Pmin = +20dBmV, 2560kHz modulation rate
– Pmin = +23dBmV, 5120kHz modulation rate
-12 to +16dBmV/256 QAM
Содержание ZoneFlex series
Страница 2: ......
Страница 6: ...iv ...
Страница 62: ...56 What to Do Next Reading Related Documentation ...
Страница 67: ...61 Appendix B Rebooting and Resetting the 7781CM ...
Страница 68: ...Copyright 2006 2013 Ruckus Wireless Inc 350 West Java Dr Sunnyvale CA 94089 USA www ruckuswireless com ...