System Description
1-6
602-13729-01 Rev B
Expedio Digital Electronic News Gathering Radio
J2
P2
70 M H z
IF O U T
70 M H z
IF IN
T X O U T
1W
19 90 -211 0
M H z
24 50 -250 0
M H z
F R O N T
P AN E L
C O N TR O L S
E xpedio Tran sm itter
Starlink/NXE 1
Chassis
J2
P2
E XC IT E
O U T
E XC IT E
IN
B AC K P L AN E
P L U G -IN R F AM P
9M H Z
IF
O U T
11 0-2 20 V A C
12 -48 VD C
7 0 M H Z
C O N V E R TE R
C O N TR O L L E R
79 .14 28 6 M H Z
X TAL O S C
L IN E AR
P O W E R AM P
D C
C N V T R
+ 5V
+ 10 V
d c
p w r
cn tl
te lem
N M S
C N TR L
N M S
C AR D
P O W E R
S U P P L Y
+ 5V
+ 12V
P S
C AR D
M P E G 2
E N C O D E R
D VB
A S I
O U T
A U D IO
IN
A N A /
D IG
V ID E O
IN
A N A /
D IG
C O F D M
E N C O D E R
M P EG
V ID E O
D VB
A S I
IN
S P I-
TO -
AS I
E X P E D IO
E N C O D E R
S IG N AL
IN TR F C
4 8 0 M H Z
C O N V E R TE R
2 G H Z
C O N V E R TE R
S YN TH
55 0 M H Z
S YN TH
1.51- 1.63 G H Z
1.97- 2.02 G H Z
C O N TR O L L E R
R F D O U B L E
U P -C O N V E R T E R
Figure 4: Expedio Transmit System Block Diagram
All modules (excluding the Front Panel and Power Amplifier) are interconnected via the
backplane that traverses the entire width of the unit. The backplane contains the various
communication buses as well as the PA (Power Amplifier) control and redundant transfer
circuitry. See Figure 5 below for locations of the Backplane and the Power Amplifier. The power
supply levels and status are monitored on the backplane and the NMS/CPU card processes the
data.
Figure 5: Location of the EXPEDIO Backplane and Power Amplifier
The NMS/CPU card incorporates microprocessor and FPGA logic to configure and monitor the
overall operation of the system via front panel controls, LCD screen menus, status LEDs and the
bar graph display. Module settings are loaded into the installed cards and power-up default
settings are stored in non-volatile memory. LCD screen menu software is uploaded into memory,
Backplane
Digital Radio
