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laforge, 01/23/2023 06:40 PM
- Table of contents
- Siemens GSM-R CAB Radio
Siemens GSM-R CAB Radio¶
Osmocom has been provided with two ancient Siemens GSM CAB Radio devices, i.e. the kind of MS installed fixed into a train engine.
Sub-Rack Hardware¶
Backplane¶
At the back of the sub-rack there's a custom back-plane to interconnect the various modules
High Voltage Power Supply Module¶
This is a fully encapsulated, passive cooled, DC/DC converter with- Input voltage 65..150V
- Two output voltage rails of 12V / 4A
12V -> 5V DC/DC converter Module¶
This is a circuit board that generates a 5V rail from 12V
GSM Modem Module¶
This is a module implementing the actual GSM-R modem. It consts of two circuit boards: One digital and one analog/RF.
Digital Board¶
RF Board¶
PC/104 embedded PC Module¶
This is a carrier board hosting a PC/104 embedded x86 Mainboard.
Carrier¶
PC/104 x86 SBC¶
I/O board¶
This is a board that brings signals from the backplane and frontplane and brings them to connectors towards the main connector panel.
Handset Hardware¶
Connector pinout¶
EXT RADIO (DB-15 female)¶
SER I/O (DB-25 male)¶
HMI 1 (DB-25 female)¶
HMI 2 (DB-25 female)¶
MVB OUT (DB-9 female)¶
MVB IN (DB-9 female)¶
ANT (N)¶
This a standdard 50-ohms N-type conector to connect to the GSM-R antenna.
PMU (DB-9 male)¶
This connector is forwarded internally to the DB-9 connector on the front of the embedded PC. Probably serial console.
TRAIN POWER AND I/O (circular connector)¶
Pin (ext) | Internal Connector | Internal Connector Pin | Wire color | Purpose |
---|---|---|---|---|
H | PL6 | 1 | rose | |
K | PL6 | 2 | white | |
M | PL6 | 3 | green | |
P | PL6 | 4 | purple | |
S | PL6 | 5 | blue | |
J | PL6 | 6 | black | |
L | PL6 | 7 | red | |
N | PL6 | 8 | yellow | |
R | PL6 | 9 | orange | |
B | PL6 | 10 | green | |
T | PL7 | 1 | white | |
d | PL7 | 2 | green | |
F | PL7 | 4 | blue | |
A | PL7 | 5 | red | |
U | PL7 | 6 | rose | |
e | PL7 | 7 | blue | |
G | PL7 | 9 | grey | |
C | PL7 | 10 | yellow | |
V | PL8 | 1 | white | |
D | PL8 | 3 | purple | |
W | PL8 | 4 | red | |
E | PL8 | 6 | orange | |
c | PL9 | 1 | orange | |
Z | PL9 | 2 | rose | |
X | PL9 | 3 | green | |
b | PL9 | 4 | grey | |
a | PL9 | 5 | red | |
Y | PL9 | 6 | yellow |
Updated by laforge over 1 year ago · 6 revisions