COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Rev. 15 Page 21
Apr. 14/16
Description and Operation
23–70–04
Use or disclosure of information on this sheet is subject
to the restrictions on the cover page of this document.
The Model S151/S161, Model S152/S162, and the Model S251/S261 Control Units
are for use in FA2100CVR System installations that comply with ARINC Characteris-
tic 757, TSO
−
C123a and EUROCAE ED–56A. The Model S151/S161, and Model
S251/S261 Control Units house the Microphone Preamplifier PWA, and the TEST
and Bulk ERASE switches. The S151/S251 Control Units are used with remote mi-
crophone Model S055, whereas the S161/S261 Control Units are used with the re-
mote microphone Model S056. The Model S152/S162 contains a built-in electret
condenser-type microphone, Microphone Preamplifier PWA, and TEST and Bulk
ERASE switches. All three of these Control Units also contain a TEST indicator
lamp and a 600-ohm HEADSET jack, with the exception of the Model S161 Control
Unit P/N: S161
−
1390
−
01, which does not have a test lamp.
The Model S150/S160 Preamplifiers are available for FA2100CVR System installa-
tions that do not require a Control Unit but that are required to comply with TSO
−
C123a and EUROCAE ED–56A. However, because ARINC Characteristic 757 does
not address microphone preamplifiers, the Model S150/S160 Preamplifiers are not
considered ARINC 557/757 compliant. The S150/S160 provides the same preampli-
fier circuit for the cockpit area microphone as the Model S151/S161, Model
S152/S162, and Model S251/S261 Control Units.
The FA2100CVR is compatible with installations using the Model A151B and A152B
Control Units; however, such installations do not comply with EUROCAE ED–56A.
The Model A151B houses the Microphone Preamplifier PWA, and the TEST and
Bulk ERASE switches. This Control Unit is used with an externally-mounted con-
denser microphone (Model A055B). The Model A152B contains a built-in condenser
microphone, Microphone Preamplifier PWA, and TEST and Bulk ERASE switches.
Both the A151B and A152B Control Units contain an analog TEST meter compatible
with the FA2100CVR.
N.
Remote Microphone Module
The Model S055/S056 Remote Microphone Modules are available to complete a
TSO
−
C123a and ED–56A-compatible installation. The Model S055 Microphone is
required with the S151 and S251 Control Units, and with the S150 Preamplifier Mod-
ule. The Model S056 Microphone is required with the S161 and S261, and with the
S160 Preamplifier Module.
The document reference is online, please check the correspondence between the online documentation and the printed version.