-6-
1.4 Parallel Altitude Data Port Specifications:
Code Format:
In accordance with U.S. National Standard for Common System
Component Characteristics for the IFF Mark X (SIF) Air Traffic
Control Radar Beacon System, SIF/ATCRBS.
Driver Description:
The parallel altitude data output is provided by the
A
uncommitted
@
collectors of a transistor array and must be
A
pulled-up
@
through a resistive load by the transponder.
Pull-Up Voltage: +3 to 50VDC.
Maximum Sink Current: 50 milliamperes.
Maximum Cable Length: 50 feet.(15.24 meters).
Input Signal Requirement: Pin 6 (strobe or signal common) must be either
grounded or connected to the transponder.
1.5 Serial Port Specifications RS232 (TxD1 and TxD2):
Electrical Format: Conforming to the TIA/EIA RS-232E standard.
Logic Levels:
A
0
@
, +9 volts. Logic
A
1
@
, -9 volts.
Driver Output Maximum Voltage:
"
25 VDC.
Driver Load Impedance: 3K
Ω
typ.
The TIA/EIA RS232E standard recommends one receiver per serial port.
Maximum Cable Length: 50 Feet.(15.24 meters)
Code Format: ASCII.
Communication System: Simplex (Talk Only).
Transmission Method: Asynchronous.
Transmission Rate: Selectable, 1200 bps to 9600 bps.
Update Rate: 10/sec.
