S9407-AB-HBK-010 Datasheet, PDF (148/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
CATEGORY
S1, S2, S4
GROUP
NUMBER
1
2
3
4
5
6
7
8
GROUP VOLTAGE V2
-180 TO -160 dBV (1.0 to 10 nanovolts)
-160 TO -140 dBV (10 to 100 nanovolts)
-140 TO -120 dBV (0.1 to 1.0 microvolts)
-120 TO -100 dBV (1.0 to 10 microvolts)
-100 TO -80 dBV (10 to 100 microvolts)
-80 TO -60 dBV (0.1 to 1.0 millivolts)
-60 TO -40 dBV (1.0 to 10 millivolts)
-40 TO -20 dBV (0.01 to 0.1 volts)
NOTES:
1. EQUIPMENT DESIGN PERFORMANCE SENSITIVITY, V1 (dBV), WILL NORMALLY BE SUPPLIED BY THE
EQUIPMENT MANUFACTURER, OR IT CAN BE OBTAINED FROM GOVERNMENT OR CONTRACTOR
FURNISHED INFORMATION. A LIMITED LIST OF CATEGORIZED INPUT SIGNAL CABLING FOR
EXISTING GFE ABOARD SSN AND SSBN SHIPS MAY BE OBTAINED FROM (CONFIDENTIAL) NUSC
TECH. MEMO NO. 871161 DTD 2 SEPT 1988.
2. WHEN THE EQUIPMENT DESIGN PERFORMANCE SENSITIVITY, V1 (dBV), IS GREATER THAN -20 dBV
(0.1 VOLTS), FOR EXAMPLE: -10 dBV, THE ASSOCIATED CABLE MUST BE ASSIGNED AN "R"
CATEGORY.
3. CABLE SPACING WITHOUT SHIELDING.
TO ESTABLISH THE GROUP NUMBER FOR CATEGORIES S1, S2, OR S4, LOCATE THE GROUP
VOLTAGE V2 (dBV) THAT INCLUDES V1 (dBV). THE GROUP NUMBER ASSOCIATED WITH THIS GROUP
VOLTAGE WILL BE THE GROUP NUMBER FOR THE SUSCEPTOR CATEGORY.
4. CABLE SPACING WITH SHIELDING.
TO ESTABLISH THE GROUP NUMBER FOR CATEGORIES S1, S2, OR S4, LOCATE THE GROUP
VOLTAGE V2 (dBV) THAT INCLUDES V3 (dBV). THE GROUP NUMBER ASSOCIATED WITH THIS GROUP
VOLTAGE WILL BE THE GROUP NUMBER FOR THE SUSCEPTOR CATEGORY.
5. IN A SITUATION WHERE THE EQUIPMENT DESIGN PERFORMANCE SENSITIVITY, V1 (dBV), CANNOT
BE OBTAINED, WITH NAVSEA APPROVAL THE FOLLOWING GUIDE MAY BE EMPLOYED AS A LAST
RESORT. IT MUST BE UNDERSTOOD THAT THIS MAY LEAD TO AN EXCESSIVE SPACING AND
SHIELDING REQUIREMENT, HENCE SHOULD BE USED SPARINGLY.
a. LOW-LEVEL RECEIVING SIGNALS (NON-AMPLIFIED), SUCH AS SONAR, RADIO, NAVIGATION: V1
= -170 dBV
b. LOW-LEVEL RECEIVING SIGNALS (AMPLIFIED), SUCH AS SONAR, RADIO, NAVIGATION:
V1 = -150 dBV
c. LOW-LEVEL SENSOR SIGNALS (NON-AMPLIFIED), SUCH AS STRAIN GAGES, RTD'S,
ACCELEROMETERS, MICROPHONES, THERMOCOUPLES, ETC.: V1 = -110 dBV
d. LOW-LEVEL SENSOR SIGNALS (AMPLIFIED), SUCH AS STRAIN GAGES, RTD'S,
ACCELEROMETERS, MICROPHONES, THERMOCOUPLES, ETC.: V1 = -90 dBV
BECAUSE OF THE APPROXIMATION, THE RESULTING CABLE DESIGNATOR IS CONSIDERED A
SPECIAL CASE AND SHOULD BE MARKED ACCORDINGLY.
Figure 6-5.
Categories S1, S2, and S4, Group Numbers
and Associated Group Voltages
Reprinted without change
6-35