RTCA SC-135 and EUROCAE WG-14 Change Proposal Form

Proposal Page Number:

1

of
4

SC
-
135
/ED
-
14

Change Proposal Form Rev
G


RTCA SC
-
135 and EUROCAE WG
-
14

Change Proposal Form

(One major comment per form.
)


(
Shaded blocks for committee use only.)

SC
-
135
/WG
-
14

Paper Number:

Rev G

FRAC
#
235

Date:


DO
-
160
F
/ED
-
14
F

Section:

19 (FRAC)

Author’s Name, Affiliation, and E
-
mail:

Kennet
h R. Cechura, Rockwell Collins,
krcechur@rockwellcollins.com

Paragraph:

19.3

Page:

19
-
3

Summary of

Change

(25 words or less)
:

Expansion and clarification of new test text & figure

Reason for Change

(Justification)
:


New test as stated and drawn are ambig
uous and do not follow existing tests in section

Revise From:

Subject the equipment under test to an audio frequency electric field

generated by
170V
rms

in a straight wire radiator of 0.20 m length located within 0.01 m of the periphery of
the unit of eq
uipment under test.
The frequencies to be applied are the same as those of the
H
-
field test of paragraph 19.3.1.
DETERMINE COMPLIANCE WITH APPLICABLE
EQUIPMENT PERFORMANCE STANDARDS.


During this test, the radiator shall be oriented with respect to each e
xternal surface of each
unit to cause maximum interference. F
or setup see Fig. 19
-
2
. The leads applying voltage
to the radiator shall be routed at least 0.6 m away from any part of the unit under test and
from the radiator itself. All units of the equipmen
t under test shall be individually tested.
The electric field power source shall not be synchronized with the power source of the
equipment supply.


Note: The Low Frequency E
-
Field test should be applied only to equipment which is
intended for installatio
n without external metallic containment, or which is covered by an
enclosure made from non
-
conducting material.


(Table 19
-
1 omitted from “revise from”)


Proposal Page Number:

2

of
4

SC
-
135
/ED
-
14

Change Proposal Form Rev
G


Revise To:

Subject the equipment under test to an audio frequency electric field generated by

170V

rms in a straight wire radiator of 0.20 m length located within 0.01 m of the
periphery of the unit of equipment under test.
See Table 19
-
1 for applicable test
frequencies and levels
.


DETERMINE COMPLIANCE WITH APPLICABLE
EQUIPMENT PERFORMANCE STANDARDS.


During this test, the radiator shall be oriented with respect to each external surface of each
unit to cause maximum interference. For setup see Fig. 19
-
2. The leads applying voltage
to the radiator shall be routed at least 0.6 m away from any part of the

unit under test and
from the radiator itself. All units of the equipment under test shall be individually tested.
The electric field power source shall not be synchronized with the power source of the
equipment supply
.

During this test, place the wire h
orizontally and sweep up the front face of the EUT,
across the top and down the back face of the EUT. Turn the radiating wire or EUT 90
degrees and sweep up the left (or right) face of the EUT, across the top, and down the
right (or left) face of the EUT.

Additional radiating wire/EUT orientations are permissible.
The goal is to test all four sides and the top of the box. Sweep at a rate slower than the
system response time.

A resistor sized for personnel protection shall be installed in the radiator wir
e. For
170Vrms, a 100 kΩ resistor would limit current to 1.7 mA in the event that a person
comes in contact with the test wire.

Note: The Low Frequency E
-
Field test should be applied only to equipment which is
intended for installation without external me
tallic containment, or which is covered by an
enclosure made from non
-
conducting material.


(SEE END OF THIS CP DOCUMENT FOR A PROPOSED FIGURE TO REPLACE THE EXISTING
FIGURE IN THE FRAC

AS WELL AS PROPOSED ADDITIONS TO TABLE 19
-
1
)

Proposal Page Number:

3

of
4

SC
-
135
/ED
-
14

Change Proposal Form Rev
G


As Modified Text:

Subjec
t the equipment under test to an audio frequency electric field generated by

170V rms in a straight wire radiator of 0.20 m length located within 0.01 m of the
periphery of the unit of equipment under test.
See Table 19
-
1 for applicable test
frequencies a
nd levels.


DETERMINE COMPLIANCE WITH APPLICABLE
EQUIPMENT PERFORMANCE STANDARDS.


During this test, the radiator shall be oriented with respect to each external surface of each
unit to cause maximum interference. For setup see Fig. 19
-
2. The leads applyin
g voltage
to the radiator shall be routed at least 0.6 m away from any part of the unit under test and
from the radiator itself. All units of the equipment under test shall be individually tested.
The electric field power source shall not be synchronized w
ith the power source of the
equipment supply
.

During this test, place the wire horizontally and sweep up the front face of the EUT,
across the top and down the back face of the EUT. Turn the radiating wire or EUT 90
degrees and sweep up the left (or rig
ht) face of the EUT, across the top, and down the
right (or left) face of the EUT. The goal is to test all four sides and the top of the box.
Sweep at a rate slower than the system response time.

A resistor sized for personnel protection shall be installe
d in the radiator wire.

Note: The
Electric
Field test should be applied only to equipment which is intended for
installation without external metallic containment, or which is covered by an enclosure
made from non
-
conducting material.



Accepted As Writ
ten


Withdrawn

X

Accepted As Modified


Rejected


Deferred


Other

Rejection Reason

/

Comments
:


Proposal Deferred To:



RTCA SC
-
135 Concurrence


EUROCAE WG
-
14 Concurrence

Proposal Disposition By:


Date:














Proposal Page Number:

4

of
4

SC
-
135
/ED
-
14

Change Proposal Form Rev
G





Pa
ragraph

Test

Category ZC

Category AC

Category BC

Category CC


Magnetic Fields
induced into the
equipment

20

A rms at
400 Hz

20

A rms at
400 Hz

20

A rms at
400 Hz

20

A rms at 400
Hz


Electric

Fields induced
into the equipment

170 V

rms at
400 Hz

170 V rms

at
400 Hz

170 V rms at
400 Hz

170 V rms at
400 Hz


Paragraph

Test

Category Z
N

Category AN

Category BN

Category CN


Magnetic Fields
induced into the
equipment

20

A rms at
350 Hz and
650 Hz

20

A rms at
350 Hz and 650
Hz

20

A rms at
350 Hz and
650 Hz

20

A

rms at 350
Hz and 650 Hz


Electric

Fields induced
into the equipment

170 V

rms at
350 Hz and
650 Hz

170 V

rms at
350 Hz and 650
Hz

170 V

rms at
350 Hz and
650 Hz

170 V

rms at
350 Hz and 650
Hz


Paragraph

Test

Category ZW

Category AW

Category BW

Categor
y CW


Magnetic Fields
induced into the
equipment

20

A rms at
350 Hz and
800 Hz

20

A rms at
350 Hz and 800
Hz

20

A rms at
350 Hz and
800 Hz

20

A rms at 350
Hz and 800 Hz


Electric

Fields induced
into the equipment

170 V rms at
350 Hz and
80
0 Hz

170 V

rms at
350 Hz and

800

Hz

170 V rms at
350 Hz and
80
0 Hz

170 V

rms at
350 Hz and

80
0 Hz