MODEL NO.
100D1788
FEATURES
Connects R/T to 4 Antennas (Upper, Lower, ADF
or Satcom.
ADF Overide with Key Interlock Prevents
Transmission into the ADF Port
Failsafe Mode Connects R/T to Lower Antenna in
the Event of a Power Loss
Auto Mode Cycles Between Upper and Lower Antenna
Using Solid State Relay Saver Circuitry for Reliability
Key Function with Memory Automatically Selects the
Antenna on which the Last Signal was Received
BIT Port for Functionality Test in Aircraft. Available on
Separate SMA Connector or J1 Control Connector
HDI
DAICO I ndustries Rev. E / Iss. 1
J3
K3
J2 J4 J5
SOLID STATE
SWITCH U/O
AUTO SEARCH
MODE
LOGIC/MEMORY
SWITCH DRIVER
J1
TO SOLID STATE
SWITCH U/O
AUTO SEARCH
RECEIVE MODE
TO ELECTRO-MECHANICAL
SWITCH U/O TRANSMIT MODE
OR MANUAL OVER-RIDE MODE
S1K1
K4
R/T
LOWER
ANT
UPPER
ANT
SATCOM
ANT
UHF/DF
ANT
SHOWN IN AUTO CYCLE MODE
J6
.xx = .02
.xxx = .010
1.71
PART IDENTIFICATION
& SER NO.
ON FARSIDE
M3470W14-15P
(MIL-C-26482)
(Series 2)
J2 THRU J6
TNC FEMALE PER
MIL-C-39012
.09
1.21
.53
.75
3.00
MAX
.196 DIA THRU
4 HOLES
4.00
TP1 CONNECTOR,SMA
FEMALE (WITH CHAIN-HELD
DUST COVER)
1.44
TP1
J1
J4
J5 J6
J3
J2
4.85
5.25
.56
2.85
3.85
.48 TYP
.38
1.63
.50
.28
.63
.19
.55
2.625 2.00
.50
MOUNTING
SURFACES
Parameter Min Typ Max Units Conditions
Operating Frequency 225 400 MHz
DC Current 150 mA At +28 VDC Supply
Insertion Loss 0.8 dB
Isolation 30 dB
VSWR 1.35/1
Impedance 50 OHMS
Switching Speed 5 mSec
RF Power Operate 100 W Average
500 W Peak
Operating Temperature -54 +25 +71 °C Intermittent @ +95°C
Weight 18.2 OZ
GUARANTEED PERFORMANCE
4 Port Antenna Selector