User's Manual Part 2

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CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
4--67
Table 4--11. Analog Input Impedance
Analog Input Type
Impedance relative
to ground
Impedance between
2pins(NOTE)
Analog 3W/2W multiplexed with A429
receivers
> 9k Ohms > 9k Ohms
Analog 3W/2W non--multiplexed > 95k Ohms (X, Y)
>
47k Ohms (Z)
> 500k Ohms
Analog 2W ac/dc > 95k Ohms > 500k Ohms
Analog 2W dc > 95k Ohms > 500k Ohms
Analog 2W dc/Ref > 95K Ohms > 500K Ohms
Analog 2W ac/dc/Ref > 95K Ohms > 500K Ohms
NOTE: For 3 Wire inputs, the differential impedance requirement applies to the
impedance between the XZ and YZ legs.
(b) 3W AC Synchro Signal Type Processing
The 3W ac synchro input signal consists of a 3 wire synchro which is excited by
a 400 Hz (nominal) AC reference input. The amplitude of the X, Y and Z inputs
and the phase relative to the AC reference determines the angle. The 3W ac
synchro inputs accept ARINC 407 syncro signals.
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CAS accepts the 400 Hz ac reference signals on the specified programmable
pins as defined in Table 4--12.
NOTE: The reference is used to synchronously detect 400 Hz ac signals.
Table 4--12. 3W Synchro AC References
400Hz AC Reference Signal Type Pin Assignment
a. Internal self--generated ac reference N/A
b. ac synchro Reference #1 RMP--4H (H), RMP--4J (C)
c. ac synchro Reference #2 RMP--5H (H), RMP--5J (C)
d. Analog 2W dc / ac Reference Input #13 RMP--11J (+), RMP--11K (--)
e. Analog 2W dc / ac Reference Input #14 RMP--15A (+), RMP--15B (--)
f. Analog 2W dc / ac Reference Input #15 RMP--15C (+), RMP--15D (--)
g. Analog 2W dc / ac Reference Input #16 RMP--15E (+), RMP--15F (--)
h. Analog 2W ac / dc / ac Reference Input #17 RBP--1A (+), RBP--1B (--)
j. Analog 2W ac / dc / ac Reference Input #18 RBP--1C (+), RBP--1D (--)