GE SIGNA Voyager Pre-Installation page 162

3. The antennas must be separated by a distance of 2 m, minimum, unless physical spacing
limitations for either the reference level or SE readings preclude maintaining that spacing. In
that event, maximum available separation must be used, but must not be less than 1 m, and
that separation must be noted on the test report
4. The coaxial cable from the receive antenna must be kept perpendicular to the axis of the
antenna for a distance of at least 1 m
5. The cable from the receive antenna is preferably routed through the wall of the shield via a
bulkhead type of coaxial connector. If this is not possible, it may be routed through a shield
door that is opened only far enough to pass the cable. If the open-door method is used, a
check for direct coupling to the receiving equipment must be made by putting a dummy load
in place of the receive antenna and verifying that any signal present is at least 10 dB below
the reference reading
6. Reference Level measurement is taken at each test location with antenna at both
polarizations (horizontal and vertical)
a. Reference Level at Horizontal Polarization
i. The reference level measurement is taken over a plane area covered as described
below.
ii. With horizontal polarization for both antennas, the receive antenna must be moved
vertically up 1.0 m from the initial position, and then move it down from the initial
position to 0.3 m above the floor. Then starting 1 m to the right of the initial position,
move slowly vertically up 1 m and then down to 0.3 m above the floor. Repeat this at
1 m to the left of the original position
iii. Record the maximum measurement reading in this plane
b. Reference Level at Vertical Polarization
i. The reference level measurement is taken over a plane area covered as described
below.
162
Illustration 7-6: Reference Level Measurement
SIGNA Voyager Pre-Installation
Direction 5680008–1EN, Revision 2
3 RF Shielding Effectiveness and Ground Isolation
Testing