User's Manual

M7X and M7R Page 2-9 Specification
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Interfaces
Front Panel
Microphone/Headset/
Loudspeaker Connector A 10-way Lemo socket that provides the following functions:
 Active (powered) or passive microphone
 Headset connection. Receiver and sidetone levels
independently adjustable. 0 to 3 V from 33 ohm source
 Local loudspeaker
 USB port for software installation and maintenance using the
Data Loader Application (DLA).
Ref BNC socket for monitoring the internal reference frequency accuracy.
AC LED indicating presence of ac power.
DC LED indicating presence of dc power.
Rear Panel Facilities
The following facilities are available at the rear panel connectors. Each connector is fully described in the
Installation topic.
Antenna Three configurable N-type antenna ports enable TX, RX or TX/RX
combinations. Guard can be independent or combined with main RX
Audio 2 off 4-wire E&M narrow-band 600 ohm balanced interfaces
adjustable from -20 to +10 dBm in 1 dB steps
2 off 4-wire E&M wideband 600 ohm balanced interfaces adjustable
from -10 to +10 dBm in 1 dB steps
1 off 2-wire 600 ohm balanced TX/RX Tape recorder output, fixed level
of -13 dBm.
PTT Multiple PTT inputs accommodating contact closure, phantom
connection and keying from both positive and negative voltage are
available on the Narrow-band (A) connector.
E1 Balanced 120 ohm, 2.048 Mbps E1 (G703, G704, G711) digital
interface. Provides remote availability of all radio functions via M7C
controller or suitable VCCS.
Ethernet Balanced 100 ohm, 10/100Mbps for connection to 10/100Base-T
Ethernet network. Provides remote access for RCMS radio control &
monitoring.
Serial 1 and 2 Multi-purpose RS422/485 serial ports for connection to peripherals
(for example, auto-tune r.f. filters) and general purpose control
equipment. Can be configured with HDLC protocol stack for the
connection of a VDL-Mode 2 control computer.
T1 Balanced 100 ohm, 1.544Mbps T1 interface for connection of a
VDL Mode 3 control computer and split-site VDL Mode 2
interconnection.
Reference BNC socket used for connecting an external 10 MHz reference
frequency (400 mV rms ± 200 mV).