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GNS 400W Series Maintenance Manual
Page 4-17
190-00356-05
Rev. A
must be interpreted as a null. The receivers can be configured to high speed mode for testing the
transmitter in high speed.
Requirements:
For:
GPS ARINC 429 OUT A
(J1-46)
GPS ARINC 429 OUT B
(J1-47)
GPS ARINC 429 IN 1A
(J1-48)
GPS ARINC 429 IN 1B
(J1-49)
GPS ARINC 429 IN 2A
(J1-50)
GPS ARINC 429 IN 2B
(J1-51)
429 RX 1 LOWSPEED and 429 RX 2 LOWSPEED
Test both 429 receivers and 429 transmitter in low speed.
Connect 429 transmitter A and B to both 429 receivers. Verify 429 RX 1 LOWSPEED OK and
429 RX 2 LOWSPEED OK via the ARINC 429 configuration page (Figure 4-9).
429 RX 1 HIGHSPEED and 429 RX 2 HIGHSPEED
Test both 429 receivers and 429 transmitter in high speed.
Connect 429 transmitter A and B to both 429 receivers. Verify: 429 RX 1 HIGHSPEED OK and
429 RX 2 HIGHSPEED OK via ARINC 429 Configuration Page (Figure 4-8).
RS232 Ports
Figure 4-9. Main RS232 Configuration Page
The RS232 TX Channels must conform to EIA Standard RS-232C with an output voltage swing
of at least ± 5 volts when driving a standard RS-232 load which is 3 to 7 kohm to ground.
The RS232 RX Channels must conform to EIA Standard RS-232C with the exception that an
input of less than 0.8 (instead of < -3.0) is interpreted as a logic 1 and input > 2.4 (instead of >3.0
V) is interpreted as a logic 0. The input resistance to ground is 3 - 7 K ohm over a voltage range
of 3 to 15 V dc with an input capacitance of < 2500 pF.
