Install Manual Part 2

SKY497
Installation Manual
2-12
Rev. C
After fabricating the cables and before installing the equipment, use the interconnect diagram to verify
continuity between each pin and its opposite end termination. Check resistance to ground between each
connector pin. When a path to ground is detected, verify its validity.
2.6.1 Antenna Cables
NOTES
1. Use of any cable not meeting BFG Avionics Systems specifications voids all
system warranties.
2. If you fabricate your own cables, you must verify that the attenuation and
VSWR does not exceed the specified values.
3. To add strain relief and alleviate stress caused by aircraft vibration, place 4-
6 inches of heat shrink tubing over each antenna connector and cable.
The directional antenna requires three cable assemblies; sum (Sigma Port), bit probe (Probe Port) and
difference (Delta Port). Cable attenuation for the sum and difference ports must not exceed 2.5 dB. Table
2-1 identifies U. S. vendors who sell approved cables by the foot. Table 2-2 provides a cable to connector
cross reference. RG142B or equivalent may be used for the bit probe cable. Attenuation for the bit probe
cable must not exceed 6 dB. VSWR, on cables attached to the sum, bit probe, and difference ports, must not
exceed 1.5:1.
Table 2-1. Directional Antenna SIGMA and DELTA Port Cable Vendors
Electrical & Mechanical Technologies (EMTEQ)
1-888-879-6170
262-679-6170
FAX [phone]
Part Number
Attenuation
(dB/100 ft 1.0 gHz)
Weight (lb)
(per 100 ft)
Maximum Length
(ft)
Minimum Bend
Radius (in)
PFLX195-100 10.81 2.7 21.8 0.50
PFLX240-100 9.76 4.5 25.0 0.75
PFLX340-100 6.3 7.2 38.2 0.88
Electronic Cable Specialists
1-800-327-9473
414-421-5300
FAX [phone]
Part Number
Attenuation
(dB/100 ft 1.0 gHz)
Weight (lb)
(per 100 ft)
Maximum Length
(ft)
Minimum Bend
Radius (in)
352001 12.2 2.7 15 0.81
311601 8.7 5.5 26 1.15
311201 5.56 8.5 41 1.59
310801 3.63 16.1 63 2.26
PIC Wire and Cable
1-800-742-3191
262-246-0500
FAX [phone]
Part Number
Attenuation
(dB/100 ft 1.0 gHz)
Weight (lb)
(per 100 ft)
Maximum Length
(ft)
Minimum Bend
Radius (in)
S33141 7.2 6.5 32 1.5
S55122 5.7 8.2 40 1.6
S22089 3.8 18 61 2.5
If cable weight is not a consideration, select lowest loss cable. Contact cable vendors before installation.
New low-loss light-weight cables may be available.