Page 19 of 23
INSTRUCTION MANUAL
AL-130R
ACTIVE LOOP ANTENNA
1912 1 E l T o ro R d
●
Si l vera do, Ca lifo rni a 9 26 76
●
(9 49) 459 -96 00
●
co m-p o wer. com
REV112216
5.2 Antenna
Positioning
As per most regulatory test procedures, the loop antenna is positioned at a fixed,
1-meter height above the ground, with a separation distance of three and thirty
meters from the Equipment Under Test (EUT).
The reference point, at which the height above the ground is measured, varies
from standard to standard. Typically, it is either at the center-point of the loop
(ANSI C63.4), or at the bottom of the loop (CISPR 11).
Rotating of the loop about its vertical axis (as shown in Figure 10), in an
exploratory manner in order to obtain the highest amplitude, is typically required.
And, in some cases, rotating of the loop about its horizontal axis (as shown in
Figure 11), may also be required, depending on the test standard.
FIGURE 10 -
Rotation of Loop about its Vertical Axis
FIGURE 11 -
Rotation of Loop about its Horizontal Axis
