Model RM-1 Receive Matrix

Model RM-1 (8 Antenna by 8 Receiver) Receive Matrix

FEATURES

Active Full Fan-Out Nonblocking Design 50 Ohm Characteristic Impedance 8 Antenna by 8 Receiver or 4 Antenna by 16 Receiver Configurations Larger Configurations Available MCU-9 Control Interface Remote Control via RS-232, RS-422 or IEEE-488 Interface

Introduction

Description

Each antenna input is buffered and amplified by a multiple-output multicoupler to provide an isolated antenna signal for each receiver. Multiple-input selector switches, one for each receiver, select the specified antenna signal for connection to the associated receiver. This multicoupler/selector switch design provides a full fan-out switch matrix for connecting any combination of receivers to any antenna.

The multicoupler utilizes a low noise wideband amplifier to drive the RF distribution circuits. This design permits operation in the presence of high intensity RF signals with minimal intermodulation distortion, noise, sensitivity to undesired signals and excellent output-to-output and output-to-input isolation. The selector switches use reed relays to interconnect the RF circuits. Extensive life testing of the reed relays demonstrates RF contact life in excess of 50 million operations with +19 dBm (2 V_rms) signals.

The RM-1 may be remotely controlled via RS-232 serial data interface to either the Delta Model MCU-9 Matrix Control Unit or a customer supplied communication system computer/controller. Optional RS-422, IEEE-488 and fiber optic interfaces are available. The RM-1 provides a nonvolatile memory to retain existing switch connection information in the event of power interruption. All switch connections are automatically reestablished upon power restoration. Built-in test equipment monitors amplifier operating points and other important functions and identifies defective assemblies which are easily replaced. The RM-1 may be locally controlled via a front panel keypad and LCD display.

The RM-1 Receive Matrix is also available in a modular and expandable configuration for switching requirements up to 24 antennas by up to 64 receivers. Consult the factory for specifications and capabilities.

Configurations

8 Antenna by 8 Receiver: This configuration provides locally and remotely controlled switching between up to eight antennas and up to eight receivers. Smaller antenna/receiver requirements can be accommodated by subequipping the unit with the number of modular antenna multicoupler assemblies or the number of modular receiver selector assemblies required.

4 Antenna by 16 Receiver: This configuration provides locally and remotely controlled switching between up to four antennas and up to sixteen receivers. Smaller antenna/receiver requirements can be accommodated by equipping the unit with the required number of modular assemblies.

The RM-1 Receive Matrix modular design enables larger switching configurations up to 24 antennas by up to 64 receivers. Custom single chassis configurations developed include the RM-1 (10 Antenna by 8 Receiver) and the RM-1 (12 Antenna by 4 Receiver). Multiple unit systems developed include the RM-1 (24 Antenna by 32 Receiver) and the RM-1 (24 Antenna by 64 Receiver). Consult the factory for specifications and capabilities.

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Model RM-1 (24 Antenna X 64 Receiver) HF Receive Matrix System

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Remote Control

The standard RM-1 serial interface is a half duplex serial data bus per EIA-RS-232 using ASCII characters for control and status information. The standard serial data format employs single digit receiver and antenna numbers. An alternate serial data format employing two digit receiver numbers and two digit antenna numbers is used for the four antenna by sixteen receiver configuration. The receive matrix remote control and status format is similar to the transmit matrix control format used with the Model MCU-8C/MCU-9C Matrix Control Units. RS-422 and IEEE-488 interfaces are also available. Consult factory for optional serial data formats or interfaces.

Standard Serial Interface Characteristics

1. Data bits per character: seven
2. Start bit: one
3. Stop bits (front panel selectable): one or two
4. Parity (front panel selectable): even or odd
5. Baud rates (front panel selectable): 50, 75, 110, 150, 300, 600, 1200, 2400, 4800, 9600 and 19200
6. Serial input circuit impedance: 180K Ohm
7. Active/tristate serial output circuit (front panel selectable): Serial output circuit is programmable for operation with either a dedicated line or party line (multiple drop) serial communication circuit.
8. Control circuits (jumper selectable): RTS, CTS, DSR, DTR and DCD

Control and Status Commands:

1. Connect command (Remote control system to RM-1):
   CR LF ADRS C R A X

2. Disconnect command (Remote control system to RM-1):
   CR LF ADRS D R X

3. Status command (Remote control system to RM-1):
   CR LF ADRS S R X

4. Status response (RM-1 to remote control system):
   CR LF ADRS S R A F M PS ETB

5. Complete status command (Remote control system to RM-1):
   CR LF ADRS S A L L X

6. Complete status response (RM-1 to remote control system):
   CR LF ADRS S R1 A R2 A R3 A R4 A
   R5 A R6 A R7 A R8 A RS AM PS F M ETB

Matrix Control Software

Installation Services and Logistic Data