Figure 4-1. modulator block diagram – Comtech EF Data SNM-1001 User Manual
Page 33
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Theory of Operation
SNM-1001 Network Control Modem
4–2
Rev. 1
Table 4-1. M&C Jumper Settings (AS/4973)
Configuration
Jumper
Position
Redundant
Non-Redundant
JP10
1 to 2
Closed
Open
3 to 4
Closed
Open
5 to 6
Open
Closed
7 to 8
Open
Closed
JP 22
5 to 6
Open
Closed
JP 2
1 to 2
Closed
Open
2 to 3
Open
Closed
JP 3
1 to 2
Closed
Open
2 to 3
Open
Closed
JP 11
1 to 2
CTS shorted to TX FPGA
CTS shorted to TX FPGA
JP 6, JP7
2 to 3
Closed
Closed
JP 18
1 to 2
Closed
Closed
JP 21
2 to 3
Off
Off
IF FILTER
VARIABLE
ATTENUATOR
50 to 180 MHz
IF
OUTPUT SWITCH
OUTPUT
-5 to -30 dBm
IF LOOPBACK
MPC
ATTENUATOR
RF SWITCH
RF
SYNTH
REF
OSC
IMPC
MPC
DDS
0
90
VCO
SCT
EXT.
RX SAT CLK
CLOCK
TX_DATA
MPC
MPC
I
DIGITAL
NYQUIST
DAC
ALIAS
FILTER
ALIAS
FILTER
DIGITAL
NYQUIST
DAC
VECTOR
ROTATION
I
Q
Q
CONVOLUTIONAL
ENCODERS
SCRAMBLERS
PREAMBLE
GENERATOR
POSTAMBLE
TX_CLOCK
M&C
COMMAND
BUS
MICRO-
PROCESSOR
MPC
Figure 4-1. Modulator Block Diagram