Motorola MTR3000 Basic Service Manual

5-10 MTR3000 Station Control Module: Functional Theory of Operation
5.2.11 Front Panel LEDs
For details on this section, refer to Table 1-8.
5.2.12 Supply Voltage Circuitry
The SCM contains on-board regulator and filtering circuitry to generate the various operating
voltages required by the SCM circuitry. The SCM routes +10 V and +8 V from two regulators on the
backplane interface board to the Receiver and Exciter modules. +14.2 V and +5.1 V from the power
supply (via the backplane interface board) are used as sources for the following supply voltage
circuits:
• +14.2 V Regulator Circuitry – input to generate 9.3 V for MAKO, and 5 V analog for the audio
circuit. This regulator also routes 14 VDC to the Receiver and Exciter modules.
• +5.1 V Regulator Circuitry – input to generate the following voltages: 3.3 V, 3.3 V analog,
2.775 V analog, 1.875 V, 1.4 V Core for Tx and Rx OMAP1710, 1.2 V Core for FPGA.
Table 5-8 Station Control Module (SCM) FP Ethernet Connector Pin-out
Pin Number Pin Name I/O
Voltage
Level (V)
Pin Description
1 ENET_TXN_FP Output 5 Ethernet Tx negative
2 ENET_TXN_FP Output 5 Ethernet Tx positive
3 ENET_RXN_FP Input 5 Ethernet Rx negative
4 GND GND GND Ground
5 GND GND GND Ground
6 ENET_RXP_FP Input 5 Ethernet Rx positive
7 GND GND GND Ground
8 GND GND GND Ground
G1 GND GND GND Ground
G2 GND GND GND Ground
Table 5-9 Station Control Module (SCM) FP External Reference Connector Pin-out
Pin Number Pin Name I/O
Voltage
Level (V)
Pin Description
C EXT_REFERENCE Input 5 5 MHz or 10 MHz external reference.
This can be either a sine or a square
wave.
G1 GND GND GND Ground
G2 GND GND GND Ground
G3 GND GND GND Ground
G4 GND GND GND Ground

Motorola MTR3000 Specifications

General

Brand	Motorola
Model	MTR3000
Category	Accessories
Language	English