User`s manual

100-M0070X2 17 of 26
www.cobham.com/gms
5.3 DDPC Top side
Located near the front of the DDPC are the POWER PLUG and the MSR MOTHER BOARD
INTERFACE, these two connectors supply power and I2C control from the MSR Mother Board
(future). See Figure 5 Top View.
5.3.1 POWER PLUG
The POWER PLUG connector is a JST B2B-PH-SMT-TBT 2MM pitch. It can receive 12 volts
from a different source than the MSR for stand-alone cases. Table 4 shows the POWER PLUG
Connections.
Pin Signal Description
1 12V Power Connection
2 Gnd Ground Connection
Table 4 Power Connector
5.3.2 MSR Mother Board Interface
The MSR MOTHER BOARD INTERFACE edge connector connects the DDPC to the MSR 80 pin
SAMTEC MEC1-140-02-F-D-A. This gives the DDPC power and I2C control. The connector also
passes through diversity tuner data from one tuner to the next. Table 5 shows the MSR
MOTHER BOARD INTERFACE Connections.
NOTE: The DDPC should not be placed in slot 1 if turners are used in the same
MSR.
PIN SIGNAL PIN
1 through 16 Pass tuner diversity data to 29 through 46
17 through 26 No Connect
27 and 28 Pass tuner diversity data to 47 and 48
31 and 32 Edge Connector Key Pins, No Connect
49 I2C Data (SDA)
50 Reset
51 I2C Clock (SCL)
52 through 56
61 through 66
71 through 76
Ground
57 through 60 Isolated 1.8V
57 through 70 Isolated 5V
57 through 80 MSR Source 12V
Table 5 MSR Mother Board Interface