
SKY899
Installation Manual
Page A-2 - Appendix A
009-11900-001
July 18, 2013
Revision F
SIGNAL
CHARACTERISTICS
Altitude (Gilham Code) /
CABLE
Minimum 22 AWG wire for lengths up to 30 ft.
Encoding Altimeter Input
VOLTAGE
+30 V input max.
(Continued)
CURRENT
<1 mA sourced per line.
FREQUENCY
<100 Hz
SOURCE Z
>10 k
Ω
per line.
MAX CAPACITANCE <20 pF per line.
Antenna
Top Directional SUM (SIGMA) Port (Blue)
J9
CONNECTION
Connector
Signal Name
J9 - TNC
SUM
CABLE
Cable and connector attenuation must not
exceed 2.5 dB, VSWR 1.5:1 (without antenna
connected). Refer to paragraph 2.6.1.
Impedance: 50
Ω
Antenna
Top Directional BIT PROBE Port (Black)
J10
CONNECTION
Connector
Signal Name
J10 - BNC
BIT
CABLE
Cable and connector attenuation must not
exceed 6 dB, VSWR 1.5:1 (without antenna
connected). Refer to paragraph 2.6.1.
Impedance: 50
Ω
Antenna
Top Directional DIFFERENCE (DELTA) Port (Red)
J11
CONNECTION
Connector
Signal Name
J11 - TNC
DIFFERENCE
CABLE
Cable and connector attenuation must not
exceed 2.5 dB, VSWR 1.5:1 (without antenna
connected). Refer to paragraph 2.6.1.
Impedance: 50
Ω
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