Measuring System Performance: Hum Measurements
125
6
Fig. 6-8 The HUM Measurement Screen
A proprietary DSP technique enables hum measurements, in-service, on
modulated carriers (non-scrambled channels).
The SDA-5000 can measure the 1 Hz hum component. To activate this
feature, set the fundamental hum frequency in the MEASUREMENT screen
to 1 Hz. The filter options on the Hum display will then become 1 Hz, <50 Hz,
and <1 kHz.
See Also
½ "Measurements Configuration" in Chapter 2 explains how to
set the fundamental hum frequency (page 25).
NOTE: The <1 kHz setting does not include the 1 Hz
component, it only includes 50 to 1,000 Hz.
CAUTION ! Hum measurements taken while the desktop
charger is in use will affect the Hum reading. For the most
accurate reading disconnect the charger prior to taking
Hum measurements.
To Next Page
Loading...
Need help?
General
