User's Manual

-50
-40
-30
-20
-10
0
10
20
30
40
435
440
445
450
455
460
465
470
475
480
485
Ref Level :
40.0 dBmV
dB / Div :
10.0 dB
Spectrum Analyzer
OVR DRVN
Model: MS2711B Serial #: 00215050
Date: 05/23/2002 Time: 11:52:40
RBW: 1 MHz VBW: 30 kHz Detection: Average
CF: 459.0 MHz SPAN: 50.0 MHz Attenuation: 0 dB
dBmV
Frequency (434.0 - 484.0 MHz)
Heavily overdriven
transmitter
Figure 5-15: Example of heavily overdriven transmitter, at input to cable modem.
The WCM definitely will not
run with a downstream signal as overdriven as shown in Figure 5-
15. Note that the top of the signal is approximately 10 dB higher than the desired signal shown
in Figure 5-13.
June 2003 Page 5-18