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3.2 AVIONICS EQUIPMENT CONFIGURATION.
Equipment con.guration is as shown in Table 3-1.
3.3 AVIONICS POWER SUPPLY.
Primary power to operate the avionics systems is pro-vided from the No. 1 and No. 2 dc primary buses and the dc essential bus, and No. 1 and No. 2 ac primary buses (Figure 2-17). When operating any of the avionics equipment, he-licopter generator output must be available or external ac power connected. Function selector switches should be at OFF before applying helicopter power.

Table 3-1. Communication/Navigation Equipment

FACILITY  NOMEN-CLATURE  USE  RANGE  CONTROL LOCATION  REMARKS 
Intercommuni-cation system  Interphone control C-11746  Intercommunication between crew-members and control of navigation and communication radio.  Stations within heli-copter  Cockpit lower console, crewchief and medic’s stations 
FM communi-cations  Radio Set AN/ARC-201 VHF-FM  Two-way voice communications, homing, frequency hopping in 30.0 -87.975 MHz range.  *Line of sight  Lower console via AMS CDU  COM 1 COM 4  and 
VHF/AM communica-tions  Radio Set AN/ARC-222  Two-way voice communications FM in frequency range of 30-87.975 MHz, AM in frequency range of 108-139.975MHz, police and marine band in frequency range of 136-174 MHz.  *Line of sight  Lower console via AMS CDU  COM 3 

Table 3-1. Communication/Navigation Equipment (Cont)

FACILITY  NOMEN-CLATURE  USE  RANGE  CONTROL LOCATION  REMARKS 
UHF commu- Radio- Two-way voice communications in  *Line of  Lower console  COM 2 
nications  Transmitter  the frequency range of 225.000 to  sight  via AMS CDU 
Radio,  399.975 MHz with HAVEQUICK. 
RT-1614/ 
ARC-
164(V) 
UHF-AM 
High fre- Radio Set  Two way voice communications in  *Over the  Lower console 
quency com- AN/ARC- the frequency range of 2 to 29.9999  horizon  via AMS CDU 
munications  220  MHz. 
Voice security  TSEC/  Secure communications.  Not appli- Lower console  Used with 
system  KY-58  cable  via AMS CDU  UHF-AM. 
Voice security  TSEC/KY- Secure communications.  Not appli- Lower console  Used with HF. 
system  100  cable  via AMS CDU 
Automatic  Direction  Radio range and broadcast recep- *50 to 100  Lower console 
direction .nd- Finder Set  tion; automatic direction .nding  miles range  via AMS CDU 
ing  AN/ARN- and homing in the frequency range  signals. 
149  of 100 to 2199.5 kHz. 
VOR/LOC/  Radio  VHF navigational aid, VHF audio  *Line of  Lower console 
GS/MB  Receiving  reception in the frequency range of  sight  via AMS CDU 
receiving set  Set  108 to 126.95 MHz and marker 
AN/ARN- beacon receiver operating at 75 
147(V)  MHz. 
Doppler/GPS  Doppler/  Provides present position or desti- Lower console 
navigation set  GPS Navi- nation navigation information to  via AMS CDU 
gation Set  AMS. 
AN/ASN-
128B 
Tactical Navi- AN/ASN- Navigational Aid.  Lower console 
gation, dis- 153(V)  via AMS CDU 
tance measur-
ing 
Pilot locating  Personnel  Navigational Aid.  Line of  Lower Console 
Locator  sight (60 
System  miles) 
AN/ARS-
6(V) 

Table 3-1. Communication/Navigation Equipment (Cont)
FACILITY  NOMEN-CLATURE  USE  RANGE  CONTROL LOCATION  REMARKS 
　
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