Table 1-Shield Resistance @ 68 °F (20 °C) Cable Diameters Versus Shield Types
[English Units]
Outside diameter inches (in.) | Nominal resistance ohm/1000 ft. | |||||
A | B | C | D | E | F | |
0.40-0.49 | 0.77 | 1.54 | 1.65 | 1.96 | 2.30 | 5.51 |
0.50-0.59 | 0.64 | 1.28 | 1.37 | 1.63 | 1.91 | 4.58 |
0.60-0.69 | 0.51 | 1.03 | 1.10 | 1.31 | 1.53 | 3.67 |
0.70-0.79 | 0.44 | 0.88 | 0.94 | 1.31 | 3.14 | |
0.80-0.89 | 0.38 | 0.77 | 0.82 | 1.14 | 2.74 | |
0.90-0.99 | 0.35 | 0.69 | 0.74 | 1.03 | 2.47 | |
1.00-1.09 | 0.31 | 0.62 | 0.66 | 0.92 | 2.20 | |
1.10-1.19 | 0.28 | 0.56 | 0.60 | 0.84 | 2.00 | |
1.20-1.29 | 0.26 | 0.51 | 0.55 | 0.77 | 1.84 | |
1.30-1.39 | 0.24 | 0.48 | 0.51 | 0.71 | 1.70 | |
1.40-1.49 | 0.22 | 0.44 | 0.47 | 0.65 | 1.57 | |
1.50-1.59 | 0.21 | 0.41 | 0.44 | 0.61 | 1.47 | |
1.60-1.69 | 0.19 | 0.38 | 0.41 | 0.57 | 1.37 | |
1.70-1.79 | 0.18 | 0.37 | 0.39 | 0.54 | 1.30 | |
1.80-1.89 | 0.17 | 0.35 | 0.37 | 0.51 | 1.24 | |
1.90-1.99 | 0.16 | 0.33 | 0.35 | 0.49 | 1.17 | |
2.00-2.09 | 0.15 | 0.31 | 0.33 | 0.46 | 1.10 | |
2.10-2.19 | 0.15 | 0.29 | 0.31 | 0.43 | 1.03 | |
2.20-2.29 | 0.14 | 0.28 | 0.30 | 0.42 | 1.00 | |
2.30-2.39 | 0.14 | 0.27 | 0.29 | 0.40 | 0.97 | |
2.40-2.49 | 0.13 | 0.25 | 0.27 | 0.38 | 0.90 | |
2.50-2.59 | 0.12 | 0.24 | 0.26 | 0.36 | 0.87 | |
2.60-2.69 | 0.12 | 0.23 | 0.25 | 0.35 | 0.83 | |
2.70-2.79 | 0.11 | 0.22 | 0.24 | 0.33 | 0.80 | |
2.80-2.89 | 0.11 | 0.22 | 0.24 | 0.33 | 0.80 | |
2.90-2.99 | 0.11 | 0.22 | 0.23 | 0.32 | 0.77 | |
3.00-3.09 | 0.10 | 0.21 | 0.22 | 0.31 | 0.73 | |
3.10-3.19 | 0.10 | 0.20 | 0.21 | 0.29 | 0.70 | |
3.20-3.29 | 0.10 | 0.20 | 0.21 | 0.29 | 0.70 | |
3.30-3.39 | 0.09 | 0.19 | 0.20 | 0.28 | 0.67 | |
3.40-3.49 | 0.09 | 0.18 | 0.19 | 0.26 | 0.63 | |
3.50-3.59 | 0.09 | 0.18 | 0.19 | 0.26 | 0.63 | |
3.60-3.69 | 0.08 | 0.17 | 0.18 | 0.25 | 0.60 | |
3.70-3.79 | 0.08 | 0.17 | 0.18 | 0.25 | 0.60 | |
3.80-3.89 | 0.08 | 0.16 | 0.17 | 0.24 | 0.57 | |
3.90-3.99 | 0.08 | 0.16 | 0.17 | 0.24 | 0.57 | |
4.00-4.99 | 0.07 | 0.15 | 0.16 | 0.22 | 0.53 |
Where: Column A-10 mil Copper shield.
Column B-5 mil Copper shield.
Column C-8 mil Coated Aluminum and 8 mil Coated Aluminum/6 mil Coated Steel shields.
Column D-7 mil Alloy 194 shield.
Column E-6 mil Alloy 194 and 6 mil Copper Clad Stainless Steel shields.
Column F-5 mil Copper Clad Stainless Steel and 5 mil Copper Clad Alloy Steel shields.
Table 2-Shield Resistance @ 68 °F (20 °C) Cable Diameters Versus Shield Types
[Metric Units]
Outside diameter millimeters (mm) | Nominal Resistance ohm/km | |||||
A | B | C | D | E | F | |
10.2-12.5 | 2.53 | 5.05 | 5.41 | 6.43 | 7.55 | 18.08 |
12.7-15.0 | 2.10 | 4.20 | 4.49 | 5.35 | 6.27 | 15.03 |
15.2-17.5 | 1.67 | 3.38 | 3.61 | 4.30 | 5.02 | 12.04 |
17.8-20.1 | 1.44 | 2.89 | 3.08 | 4.30 | 10.30 | |
20.3-22.6 | 1.25 | 2.53 | 2.69 | 3.74 | 8.99 | |
22.9-25.1 | 1.15 | 2.26 | 2.43 | 3.38 | 8.10 | |
25.4-27.7 | 1.02 | 2.03 | 2.16 | 3.02 | 7.22 | |
27.9-30.2 | 0.92 | 1.84 | 1.97 | 2.76 | 6.56 | |
30.5-32.8 | 0.85 | 1.67 | 1.80 | 2.53 | 6.04 | |
33.0-35.3 | 0.79 | 1.57 | 1.67 | 2.33 | 5.58 | |
35.6-37.8 | 0.72 | 1.44 | 1.54 | 2.13 | 5.15 | |
38.1-40.4 | 0.69 | 1.34 | 1.44 | 2.00 | 4.82 | |
40.6-42.9 | 0.62 | 1.25 | 1.34 | 1.87 | 4.49 | |
43.2-45.5 | 0.59 | 1.21 | 1.28 | 1.77 | 4.26 | |
45.7-48.0 | 0.56 | 1.15 | 1.21 | 1.67 | 4.07 | |
48.3-50.5 | 0.52 | 1.08 | 1.15 | 1.61 | 3.84 | |
50.8-53.1 | 0.49 | 1.02 | 1.08 | 1.51 | 3.61 | |
53.3-55.6 | 0.49 | 0.95 | 1.02 | 1.41 | 3.38 | |
55.9-58.2 | 0.46 | 0.92 | 0.98 | 1.38 | 3.28 | |
58.4-60.7 | 0.46 | 0.89 | 0.95 | 1.31 | 3.18 | |
61.0-63.2 | 0.43 | 0.82 | 0.89 | 1.25 | 2.95 | |
63.5-65.8 | 0.39 | 0.79 | 0.85 | 1.18 | 2.85 | |
66.0-68.3 | 0.39 | 0.75 | 0.82 | 1.15 | 2.72 | |
68.6-70.9 | 0.36 | 0.72 | 0.79 | 1.08 | 2.62 | |
71.1-73.4 | 0.36 | 0.72 | 0.79 | 1.08 | 2.62 | |
73.7-75.9 | 0.36 | 0.72 | 0.75 | 1.05 | 2.53 | |
76.2-78.5 | 0.33 | 0.69 | 0.72 | 1.02 | 2.39 | |
78.7-81.0 | 0.33 | 0.66 | 0.69 | 0.95 | 2.30 | |
81.3-83.6 | 0.33 | 0.66 | 0.69 | 0.95 | 2.30 | |
83.6-86.1 | 0.29 | 0.62 | 0.66 | 0.92 | 2.20 | |
86.4-88.6 | 0.29 | 0.59 | 0.62 | 0.85 | 2.07 | |
88.9-91.2 | 0.29 | 0.59 | 0.62 | 0.85 | 2.07 | |
91.4-93.7 | 0.26 | 0.56 | 0.59 | 0.82 | 1.97 | |
94.0-96.3 | 0.26 | 0.56 | 0.59 | 0.82 | 1.97 | |
96.5-98.8 | 0.26 | 0.52 | 0.56 | 0.79 | 1.87 | |
99.1-101.3 | 0.26 | 0.52 | 0.56 | 0.79 | 1.87 | |
101.6-103.9 | 0.23 | 0.49 | 0.52 | 0.72 | 1.74 |
Where: Column A-10 mil Copper shield.
Column B-5 mil Copper shield.
Column C-8 mil Coated Aluminum and 8 mil Coated Aluminum/6 mil Coated Steel shields.
Column D-7 mil Alloy 194 shield.
Column E-6 mil Alloy 194 and 6 mil Copper Clad Stainless Steel shields.
Column F-5 mil Copper Clad Stainless Steel and 5 mil Copper Clad Alloy Steel shields.
R68 = Rt/[1 + A(t - 68)] for English Units
R20 = Rt/[1 + A(t - 20)] for Metric Units
Where:
R68 = Shield resistance corrected to 68 °F in ohms.
R20 = Shield resistance corrected to 20 °C in ohms.
Rt = Shield resistance at measurement temperature in ohms.
A = Temperature coefficient of the shield tape.
t = Measurement temperature in °F or (°C).
Note: Only the megohm-mile (megohm-km) requirement shall be cause for rejection, not individual measurement differences.
Table 3-DC Loop Resistance @ 68 °F (20 °C)
American wire gauge (AWG) | Loop resistance | |
ohms/1000 ft | ohms/km | |
19 | 16.1 | 52.8 |
22 | 32.4 | 106.3 |
24 | 51.9 | 170.3 |
26 | 83.3 | 273.3 |
Rt = R68 * [1 + 0.0022 * t - 68)] for English Units
Rt = R20 * [1 + 0.0040 * (t - 20)] for Metric Units
Where:
Rt = Loop resistance at the measurement temperature in ohms.
R68 = Loop resistance at a temperature of 68 °F in ohms.
R20 = Loop resistance at a temperature of 20 °C in ohms.
t = Measurement temperature in °F or (°C).
Table 4-Frequency Attenuation @ 68 °F (20 °C) D66 Loaded Exchange Cables 83 nanofarad (nF)/mile (52 nF/km) (See Note)
Frequency (Hz) | Attenuation dB/mile (dB/km) AWG | |||
19 | 22 | 24 | 26 | |
200 | 0.41 (0.26) | 0.67 (0.42) | 0.90 (0.56) | 1.21 (0.75) |
400 | 0.43 (0.26) | 0.77 (0.48) | 1.09 (0.68) | 1.53 (0.95) |
600 | 0.44 (0.27) | 0.80 (0.49) | 1.17 (0.73) | 1.70 (1.06) |
800 | 0.44 (0.27) | 0.81 (0.50) | 1.21 (0.75) | 1.80 (1.12) |
1000 | 0.44 (0.27) | 0.82 (0.51) | 1.23 (0.76) | 1.86 (1.15) |
1200 | 0.45 (0.28) | 0.83 (0.52) | 1.24 (0.77) | 1.91 (1.19) |
1400 | 0.45 (0.28) | 0.83 (0.52) | 1.26 (0.78) | 1.94 (1.20) |
1600 | 0.45 (0.28) | 0.84 (0.52) | 1.26 (0.78) | 1.96 (1.22) |
1800 | 0.45 (0.28) | 0.84 (0.52) | 1.27 (0.78) | 1.98 (1.23) |
2000 | 0.46 (0.29) | 0.85 (0.53) | 1.28 (0.79) | 1.99 (1.24) |
2200 | 0.46 (0.29) | 0.85 (0.53) | 1.29 (0.80) | 2.01 (1.25) |
2400 | 0.47 (0.29) | 0.86 (0.53) | 1.30 (0.81) | 2.02 (1.26) |
2600 | 0.47 (0.29) | 0.87 (0.54) | 1.31 (0.81) | 2.04 (1.27) |
2800 | 0.48 (0.30) | 0.88 (0.55) | 1.32 (0.82) | 2.07 (1.29) |
3000 | 0.49 (0.30) | 0.89 (0.55) | 1.34 (0.83) | 2.10 (1.30) |
3200 | 0.50 (0.31) | 0.91 (0.57) | 1.36 (0.84) | 2.13 (1.32) |
3400 | 0.52 (0.32) | 0.93 (0.58) | 1.40 (0.87) | 2.19 (1.36) |
3600 | 0.54 (0.34) | 0.97 (0.60) | 1.45 (0.90) | 2.26 (1.40) |
3800 | 0.57 (0.35) | 1.02 (0.63) | 1.52 (0.94) | 2.36 (1.47) |
4000 | 0.62 (0.38) | 1.10 (0.68) | 1.63 (1.01) | 2.53 (1.57) |
NOTE: Between end-section lengths of 2,250 ft (686 m) for D66 loading.
Table 5-Frequency Attenuation @ 68 °F (20 °C) H88 Loaded Exchange Cables 83 nF/ mile (52 nF/km) (See Note)
Frequency (Hz) | Attenuation dB/mile (dB/km) AWG | |||
19 | 22 | 24 | 26 | |
200 | 0.40 (0.25) | 0.66 (0.41) | 0.90 (0.56) | 1.20 (0.75) |
400 | 0.42 (0.26) | 0.76 (0.47) | 1.08 (0.67) | 1.53 (0.95) |
600 | 0.43 (0.27) | 0.79 (0.49) | 1.16 (0.72) | 1.70 (1.06) |
800 | 0.43 (0.27) | 0.80 (0.50) | 1.20 (0.75) | 1.80 (1.12) |
1000 | 0.43 (0.27) | 0.81 (0.50) | 1.23 (0.76) | 1.86 (1.15) |
1200 | 0.44 (0.27) | 0.82 (0.51) | 1.24 (0.77) | 1.91 (1.19) |
1400 | 0.44 (0.28) | 0.82 (0.51) | 1.25 (0.78) | 1.94 (1.20) |
1600 | 0.44 (0.27) | 0.83 (0.52) | 1.26 (0.78) | 1.97 (1.22) |
1800 | 0.45 (0.28) | 0.84 (0.52) | 1.28 (0.79) | 1.99 (1.24) |
2000 | 0.46 (0.29) | 0.85 (0.53) | 1.29 (0.80) | 2.02 (1.26) |
2200 | 0.47 (0.29) | 0.86 (0.53) | 1.31 (0.81) | 2.06 (1.28) |
2400 | 0.48 (0.30) | 0.89 (0.55) | 1.34 (0.83) | 2.10 (1.30) |
2600 | 0.50 (0.31) | 0.92 (0.57) | 1.39 (0.86) | 2.18 (1.35) |
2800 | 0.53 (0.33) | 0.97 (0.60) | 1.47 (0.91) | 2.29 (1.42) |
3000 | 0.59 (0.37) | 1.07 (0.66) | 1.60 (0.99) | 2.48 (1.54) |
3200 | 0.71 (0.44) | 1.26 (0.78) | 1.87 (1.16) | 2.86 (1.78) |
3400 | 1.14 (0.71) | 1.91 (1.19) | 2.64 (1.64) | 3.71 (2.30) |
3600 | 4.07 (2.53) | 4.31 (2.68) | 4.65 (2.90) | 5.30 (3.29) |
3800 | 6.49 (4.03) | 6.57 (4.08) | 6.72 (4.18) | 7.06 (4.39) |
4000 | 8.22 (5.11) | 8.27 (5.14) | 8.36 (5.19) | 8.58 (5.33) |
NOTE: Between end-section lengths of 3,000 ft (914 m) for H88 loading.
Table 6-Frequency Attenuation @ 68 °F (20 °C) Nonloaded Exchange Cables 83 nF/ mile (52 nF/km) AWG
Frequency (Hz) | Attenuation dB/mile (dB/km) AWG | |||
19 | 22 | 24 | 26 | |
200 | 0.58 (0.36) | 0.82 (0.51) | 1.03 (0.64) | 1.30 (0.81) |
400 | 0.81 (0.51) | 1.15 (0.71) | 1.45 (0.90) | 1.84 (1.14) |
600 | 0.98 (0.61) | 1.41 (0.87) | 1.77 (1.10) | 2.26 (1.40) |
800 | 1.13 (0.70) | 1.62 (1.01) | 2.04 (1.27) | 2.60 (1.61) |
1000 | 1.25 (0.78) | 1.80 (1.12) | 2.28 (1.42) | 2.90 (1.80) |
1200 | 1.36 (0.84) | 1.97 (1.22) | 2.50 (1.55) | 3.17 (1.97) |
1400 | 1.46 (0.91) | 2.12 (1.32) | 2.69 (1.67) | 3.42 (2.12) |
1600 | 1.55 (0.96) | 2.26 (1.40) | 2.87 (1.78) | 3.65 (2.27) |
1800 | 1.63 (1.01) | 2.39 (1.48) | 3.04 (1.89) | 3.87 (2.40) |
2000 | 1.71 (1.06) | 2.51 (1.56) | 3.20 (1.99) | 4.08 (2.53) |
2200 | 1.78 (1.11) | 2.62 (1.63) | 3.35 (2.08) | 4.27 (2.65) |
2400 | 1.85 (1.15) | 2.73 (1.70) | 3.49 (2.17) | 4.45 (2.76) |
2600 | 1.91 (1.19) | 2.83 (1.76) | 3.62 (2.25) | 4.63 (2.88) |
2800 | 1.97 (1.22) | 2.93 (1.82) | 3.75 (2.33) | 4.80 (2.98) |
3000 | 2.03 (1.26) | 3.02 (1.88) | 3.88 (2.41) | 4.96 (3.08) |
3200 | 2.08 (1.29) | 3.11 (1.93) | 4.00 (2.48) | 5.12 (3.18) |
3400 | 2.13 (1.32) | 3.19 (1.98) | 4.11 (2.55) | 5.27 (3.27) |
3600 | 2.18 (1.35) | 3.28 (2.04) | 4.22 (2.62) | 5.41 (3.36) |
3800 | 2.22 (1.38) | 3.36 (2.09) | 4.33 (2.69) | 5.55 (3.45) |
4000 | 2.27 (1.41) | 3.43 (2.13) | 4.43 (2.75) | 5.69 (3.53) |
Table 7-Cable Attenuation @ 68 °F (20 °C) Filled Cables-Solid Insulation
Frequency (kHz) | Attenuation dB/mile (dB/km) Gauge (AWG) | |||
19 | 22 | 24 | 26 | |
10 | 2.8 (1.7) | 4.8 (2.9) | 6.4 (3.9) | 8.5 (5.3) |
20 | 3.2 (2.0) | 5.8 (3.6) | 8.2 (5.1) | 11.2 (6.9) |
40 | 3.6 (2.2) | 6.5 (4.0) | 9.6 (6.0) | 13.9 (8.6) |
60 | 4.0 (2.5) | 6.9 (4.2) | 10.3 (6.4) | 15.2 (9.4) |
80 | 4.5 (2.8) | 7.3 (4.5) | 10.7 (6.6) | 16.0 (9.9) |
100 | 4.9 (3.0) | 7.7 (4.7) | 11.1 (6.8) | 16.5 (10.2) |
112 | 5.2 (3.2) | 8.0 (4.9) | 11.3 (7.0) | 16.8 (10.5) |
120 | 5.4 (3.3) | 8.1 (5.0) | 11.5 (7.1) | 17.0 (10.6) |
140 | 5.8 (3.6) | 8.6 (5.3) | 11.9 (7.4) | 17.4 (10.8) |
160 | 6.2 (3.8) | 9.0 (5.6) | 12.3 (7.6) | 17.8 (11.1) |
180 | 6.6 (4.1) | 9.5 (5.9) | 12.7 (7.9) | 18.2 (11.3) |
200 | 7.0 (4.3) | 10.0 (6.2) | 13.2 (8.2) | 18.6 (11.5) |
300 | 8.7 (5.4) | 12.2 (7.5) | 15.4 (9.6) | 20.6 (12.8) |
400 | 10.0 (6.2) | 14.1 (8.8) | 17.7 (11.0) | 22.9 (14.2) |
500 | 11.2 (6.9) | 15.9 (9.8) | 19.8 (12.3) | 25.2 (15.6) |
600 | 12.2 (7.5) | 17.5 (10.9) | 21.8 (13.6) | 27.4 (17.0) |
700 | 13.2 (8.2) | 19.0 (11.8) | 23.6 (14.7) | 29.6 (18.4) |
772 | 13.8 (8.5) | 19.9 (12.4) | 24.8 (15.4) | 31.4 (19.5) |
800 | 14.2 (8.8) | 20.1 (12.5) | 27.4 (17.1) | 31.7 (19.7) |
900 | 14.8 (9.2) | 21.6 (13.4) | 29.0 (18.0) | 33.8 (21.0) |
1000 | 15.8 (9.8) | 22.7 (14.1) | 31.1 (19.3) | 35.9 (22.3) |
1100 | 16.4 (10.2) | 23.8 (14.8) | 32.7 (20.3) | 38.0 (23.6) |
1200 | 17.4 (10.8) | 24.8 (15.4) | 34.3 (21.3) | 40.0 (24.9) |
1300 | 17.9 (11.1) | 25.9 (16.1) | 35.4 (22.0) | 41.7 (25.9) |
1400 | 19.0 (11.8) | 26.9 (16.7) | 37.0 (23.0) | 43.3 (26.9) |
1500 | 19.5 (12.1) | 28.0 (17.4) | 38.0 (23.6) | 44.3 (27.6) |
1576 | 20.1 (12.4) | 29.0 (18.0) | 39.0 (24.3) | 44.4 (28.2) |
Table 8-Cable Attenuation @ 68 °F (20 °C) Filled Cables-Expanded Insulation
Frequency (kHz) | Attenuation dB/mile (dB/km) Gauge (AWG) | |||
19 | 22 | 24 | 26 | |
10 | 3.0 (1.8) | 4.9 (3.0) | 6.5 (4.0) | 8.6 (5.3) |
20 | 3.5 (2.1) | 6.0 (4.1) | 8.5 (5.2) | 11.5 (7.1) |
40 | 4.0 (2.5) | 7.0 (4.3) | 10.2 (6.3) | 14.4 (8.9) |
60 | 4.5 (2.8) | 7.5 (4.6) | 11.1 (6.8) | 16.0 (9.9) |
80 | 5.2 (3.3) | 7.9 (4.9) | 11.3 (6.9) | 16.2 (10.1) |
100 | 5.8 (3.6) | 8.4 (5.2) | 11.6 (7.2) | 16.4 (10.2) |
112 | 6.0 (3.8) | 8.8 (5.4) | 11.9 (7.4) | 16.6 (10.3) |
120 | 6.2 (3.9) | 9.0 (5.6) | 12.1 (7.5) | 16.9 (10.5) |
140 | 6.6 (4.1) | 9.5 (5.9) | 12.7 (7.9) | 17.2 (10.7) |
160 | 6.9 (4.3) | 10.0 (6.2) | 13.2 (8.2) | 17.4 (10.8) |
180 | 7.4 (4.6) | 10.6 (6.6) | 13.7 (8.5) | 17.9 (11.1) |
200 | 7.9 (4.9) | 11.1 (6.9) | 14.2 (8.8) | 18.5 (11.5) |
300 | 9.5 (5.9) | 13.2 (8.2) | 16.8 (10.5) | 21.6 (13.4) |
400 | 11.1 (6.9) | 15.3 (9.5) | 19.5 (12.1) | 24.3 (15.1) |
500 | 12.1 (7.5) | 17.9 (11.1) | 22.2 (13.8) | 27.4 (17.1) |
600 | 13.7 (8.5) | 19.5 (12.1) | 24.3 (15.1) | 29.6 (18.4) |
700 | 14.8 (9.2) | 21.1 (13.1) | 26.4 (16.4) | 32.2 (20.0) |
772 | 15.3 (9.5) | 21.6 (13.4) | 27.4 (17.1) | 33.8 (21.90) |
800 | 15.8 (9.8) | 22.2 (13.8) | 28.0 (17.4) | 34.4 (21.3) |
900 | 17.0 (10.5) | 23.8 (14.8) | 29.6 (18.4) | 36.4 (22.6) |
1000 | 17.4 (10.8) | 24.8 (15.4) | 31.1 (19.3) | 38.5 (23.9) |
1100 | 17.9 (11.1) | 26.4 (16.4) | 33.3 (20.7) | 40.6 (25.3) |
1200 | 19.0 (11.8) | 27.4 (17.1 | 34.3 (21.3) | 42.2 (26.2) |
1300 | 19.5 (12.1) | 28.5 (17.7) | 35.9 (22.3) | 43.8 (27.2) |
1400 | 20.1 (12.5 | 29.6 (18.4) | 37.0 (23.0) | 45.9 (28.5) |
1500 | 20.6 (12.8) | 30.6 (19.0) | 38.5 (23.9) | 47.5 (29.5) |
1576 | 21.6 (13.4) | 31.1 (19.3) | 39.1 (24.3) | 48.6 (30.2) |
At = A68 * [1 + 0.0012 * (t - 68)] for English Units
At = A20 * [1 + 0.0022 * (t - 20)] for Metric Units
Where:
At = Insertion loss at the measurement temperature in dB.
A68 = Insertion loss at a temperature of 68 °F in dB.
A20 = Insertion loss at a temperature of 20 °C in dB.
t = Measurement temperature in °F or (°C); and
7 C.F.R. §1755.403