E. Inherent features:
(1) Mode A - in this mode, the 4096 character code set on the control head
is sent as a reply to interrogation from a ground station.
(2) Mode C - in this mode, the encoded altitude is sent in addition to the
mode A reply. The altitude information must be delivered from an exter-
nal device (e.g. Becker Blind Encoder BE6400).
(3) A special identifier pulse (SPI) can be activated by pressing the IDT
button in Mode A/C and Mode S.
(4) Selftests (BITs). An Initiated Built-In Test (IBIT), a Continuous Built-
In Test (CBIT) and a Power-on Built-In Test (PBIT) are integrated in
the transponder.
3. Technical data
A. General data
Supply voltage 10.0 V to 33.0 V DC
Typical consumption 50 mode S replies/sec. + Squitter
0.37 A at 14 V (illumination off)
0.22 A at 28 V (illumination off)
0.43 A at 14 V (illumination max.)
0.25 A at 28 V (illumination max.)
in standby mode:
0.22 A at 14 V (illumination off)
0.14 A at 28 V (illumination off)
0.28 A at 14 V (illumination max.)
0.16 A at 28 V (illumination max.)
Panel illumination control input
Illumination control current max. 1 mA at 28 V
Illumination color (display and buttons) white
Serial interfaces RS-422
Data link capability 255 GICB registers
DME suppression:
- input voltage < 2 V (no suppression)
> 8 V (suppression)
- output voltage < 0.5 V (not active)
> 18 V (active)
External Ident input:
“0” (active) £ 3.5 V
“1” (passive) ³ 4.0 V
source (shorted to GND) £ 10 mA
Page 1-2
34-50-08 September 2011
INSTALLATION AND OPERATION BXP6401-X-(XX)
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