Urban Canyon Flight Inc UC10X ユーザーズマニュアル
UC10x Installation Manual
URBAN CANYON FLIGHT INC
UC10X-001-IM REV02
CONFIDENTIAL & PROPRIETARY
PAGE 38 OF 69
Table 10. GPS products for TABS (TSO-C199) compliant system
TSO
Class
Manfr
Manfr PN
MOPS
Price Interface Rate
Class B
$800 ??
1 Hz or 4 Hz
8.4 Altitude Input
The unit does not support a Gillham (gray code) input.
Barometric altitude must be provided via one of the RS-232 serial ports.
8.5 RF Suppression Bi-Directional Bus
The mutual suppression input/output is used to provide suppression of L-band equipment on the aircraft.
The transponder uses the signal as an input to inhibit all transmission activities and decoding of receiver signals
when other equipment on the aircraft is transmitting. When the transponder transmits, it asserts the output to
provide the suppression to other systems on the airplane.
The duration of the asserted output is variable (20 µs min / 130 µs max), depending if the transmission is Mode
A/C (28 µs typical), Mode S short (67 µs typical), or Mode S long / 1090ES (123 µs typical). Per DO-181E § 2.2.11(b),
the suppression output signal shall precede the transponder RF transmission by no more than 10 µs, and return to
the inactive state no later than 10 µs after transmission. Furthermore, per DO-181E § 2.2.11(a), the UC10x will
regain sensitivity, within 3dB, not later than 15 µs after the end of the applied mutual suppression pulse.
The physical implementation (the “PHY” layer) of the RF suppression bus is proprietary (e.g. does not conform with
standards such as ARINC 735B Attachment 8).
The RF suppression output is open drain, driven by an N-channel MOSFET with an internal 1kΩ pullup to 3.3V.
When used as an input, the RF suppression bus is designed to operate directly with external devices capable of
driving 3.3V TTL and CMOS logic standards. Alternatively, the interface also works with devices capable of an open
collector output drive. In all cases, the external interface must be capable of sinking up to 5 mA.
Regardless of input/output state, the RF suppression connection is ESD and transient voltage protected, tolerant to
operate with voltages up to 5V max. The latency of the RF suppression bus, both input/output, is maximum 1 µs.
operate with voltages up to 5V max. The latency of the RF suppression bus, both input/output, is maximum 1 µs.
8.6 Automatic Air/Ground Determination
The unit is designed to interface with an automatic weight-on-wheels (WOW) sensor, also known as a squat
switch, which is a device that automatically provides On Ground / In Air status, through this single pin. Connection
of a WOW switch is optional, for aircraft that do not have a WOW sensor, squat switch detection can be disabled
via either serial port.
8.7 Antenna Port
UC10x has an SMA female antenna connector. UC10x system does not include an antenna or antenna cable. See
11.4 Antenna for antenna and antenna cable guidance.