Installation Manual

Upstream Transmit Power Level
Channel
US Channel Type
Symbol Rate
Acceptable US Power Level
Single
TDMA
1280 Ksym/sec
+61 dBmV to 45 dBmV
ATDMA
2560 Ksym/sec
+58 dBmV to 45 dBmV
5120 Ksym/sec
+57 dBmV to 45 dBmV
Two
TDMA
1280 Ksym/sec
+58 dBmV to 45 dBmV
ATDMA
2560 Ksym/sec
+55 dBmV to 45 dBmV
5120 Ksym/sec
+54 dBmV to 45 dBmV
Three or more
TDMA
1280 Ksym/sec
+55 dBmV to 45 dBmV
ATDMA
2560 Ksym/sec
+52 dBmV to 45 dBmV
5120 Ksym/sec
+51 dBmV to 45 dBmV
5. Refresh the page at least twice to identify variations in SNR, Downstream Power,
and Upstream Power.
NOTE: If the either of the signal levels are outside of the acceptable range, power
cycle or factory reset the modem.
6. Contact the cable provider to adjust the signal level to the acceptable level range.
Acceptable Signal Levels
Recommended Max Downstream
Power Level (DPL)
Recommended Min Downstream
Power Level (DPL)
+15 dBmV
-15 dBmV
Downstream Signal to Noise Ratio (SNR)
Modulation
Downstream
Power Level
Acceptable DS SNR
64 QAM
n/a
23.5 dB or greater
256 QAM
-6 dBmV to +15 BmV
30 dB or greater
-6 dBmV to -15 dBmV
33 dB or greater