MODEL NO.
DSWX9078
F E AT U R E S
DC - 400 MHz
40 dB Isolation
Auto Mode Cycle Between Upper
for Two Radio
Failsafe Mode
Bit Port for Functionality Testing in Aircraft
HDI
D A I C O
I n d u s t r i e s
Rev. N/D / Iss. 1
Test Point (TPI) Chart
Power On
Mode
Com 1
Com 2
Test Point
to
to
Voltage
A
Lower
VHF
1V
B
Lower
Upper
3V
C
Upper
VHF
5V
D
Upper
Lower
7V
Power Off
0V
Antenna Selector 4-Port
Parameter
Min Typ
Max Units
Conditions
Operating Frequency
DC
500
MHz
DC Current
210
350
mA
At +28 VDC Supply
Isolation
40
72
dB
Insertion Loss
0.5
dB
30 - 400 MHz
0.6
dB
400 - 500 MHz
0.25
dB
J5 - J6 @ 30 MHz
VSWR
1.2/1 1.25/1
30 - 400 MHz
1.35/1
400 - 500 MHz
Impedance
50
OHMS
Switching Speed
2.6
5
mSec
RF Power
Operate
100
W
Average
No Damage
500
W
Peak
Operating Temperature
-54
+25
+71
C
Intermittent @ +95
C
G U A R A N T E E D P E R F O R M A N C E
J4 CONNECTOR
PIN
FUNCTION
1
Primary Power Return
2
Spare
3
Primary Power (+28V)
4
Spare
5
Upper/Lower Indicator
6
Com 2 Transmit Key
7
Mode Select
8
Com 1 Transmit Key
9
Com 2 Band Indicator
(UHF/VHF Select)
10
Com 2 Squelch Input
11
Com 1 Squelch Input
12
Com 1 Secure Indicator
13
Com 2 Secure Indicator
Upper/Lower Indicator
CONTROL LOGIC
5
COM 1 SECURE IND.
COM 2 SECURE IND.
SQUELCH 1
SQUELCH 2
KEY 1
KEY 2
INDICATOR OUTPUT
FROM R/T2
(COM 2 BAND)
12
13
11
10
8
6
7
9
J4
OFF=OPEN=NORM
ON=SATURATED
OFF=OPEN=NORM
ON=SATURATED
OPEN=RCV
GND=XMIT
OPEN=RCV
GND=XMIT
+28=UPPER
GND=UPPER
OPEN=AUTO
OPEN=VHF SELECT
GND=UHF SELECT
J3
J5
J6
J1
J2
UHF
UPPER
UHF/VHF
COM 2
VHF
UHF
COM 1
VHF
LOWER
UHF/VHF
Select
J4 - J9
3
Primary PWR (+28V)
1
Primary Return
NORM
NORM
SECURE
SECURE
.190-32 UNF-2A THREAD
SOCKET HEAD CAPTIVE SCREW
(.156 HEX DRIVE)
4 PLACES
1.10
0.09
.02
.43
1.23
WITH M527473T10B35S
M527478Y10D13P MATES
1.25 MAX
OVER HDW
3.95
.59
REF
J4 KEYWAY
SURFACE
MOUNTING
.59
.74
5 PLACES
4.50
1.500
J5
J2
0.25
TNC FEMALE
5 PLACES
J4
J1
J3
1.75
5.000
0.12
IDENTIFICATION
PART
J6
2.00
5.50
0.50
.250
TPI
3.88
.43
1.70
1.23
TEST POINT (TPI)
WILL ACCEPT PROBE
OF 0.40 DIA. (SEE CHART)
.94
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