Antex electronic XM-100 - Manual (Page 16)

XM-100 Commercial Satellite Audio Receiver 16
Signal Quality
When Setup – Signal Quality is displayed, pressing the Mode
button brings up the following menu:
CN1 CN2 TBER
#.# #.# ###
This menu may also be displayed by holding the power button
for 4 seconds when at the main display. Pressing the Mode
button returns up one menu level. Pressing the power button
exits the setup menus to normal operation.
CN1 and CN2 indicate the carrier to noise ratio of the satellite
signal received from the two XM satellites positioned in the
southern sky over the equator. The higher the number the
better, and both numbers should be 10 or greater for good
margin, but not less than 7.0.
TBER is the percentage of bit errors received from a terrestrial
repeater, if there is one. Acceptable values for this number
may be anywhere from 0% if a repeater is nearby, to 100% if
only the satellite signals are available – lower is better.
Position and rotate the antenna for the optimum balance
(highest readings) for CN1 and CN2. Note that CN1 measures
signal received from the satellite in the Eastern sky, CN2 signal
received from the satellite in the Western sky. Obstructions
such as trees or tall buildings may interfere with reception of
one or more satellite signals and require the antenna to be
repositioned.
Line Level
When Setup – Line Level is displayed, pressing the Mode
button brings up the following menu:
Line Level
+9 2.00VRMS
This setting adjusts the level of the audio outputs from
0.25VRMS to 2.0VRMS for compatibility with a wide range of
commercial amplifiers. The maximum level is indicated on the
right side of the display in volts RMS, and a relative number