Enabling the Altimeter Encoder Option
© 2017 General Electric Company – All Rights Reserved. ADTS 405 R/F Mk2 Instruction Manual-English | 47
4.15 Enabling the Altimeter Encoder Option
a. Press and hold down F1 and press SETUP to enter the configuration menu. Release
both keys.
b. Press [MORE], [DISPLAY/OPTIONS], [DISPLAY TYPE], [NEXT], [ENCODER].
c. Check the display shows “Encoder” is selected.
d. Press [SAVE], then repeatedly press CLEAR/QUIT until the display shows the
following:
Note: With an incorrect bit combination such as all zeros, the display shows “ENCODER
ERROR” in the place of the decoded value.
20 GND
b
21 GND
b
22 GND
b
23 GND
b
24 GND
b
a. Chassis connection.
b. 0V return for signals (not chassis).
1 Controlled or measured parameter. 2 Aim (set-point or target) in control
mode, or “Leak Measure” when the
pressure controller is off.
3 Measured value. 4 “<” Pointer for parameter, i.e. aim that
changes on data entry.
5 Units of measurement. 6 Altitude encoder bit code.
7 Special messages, e.g. warm-up
period.
8 Altitude encoder decoded value.
Table 4-4: IEEE 488 Connector Pin-out
Pin Number Function
Alt 5000 ft
Aim 5000<
D2 to C4>00001010010
CODE 5000 WARMUP
1
3
5
7
8
4
2
6
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