Model RM-1 HF Receive Matrix



Model RM-1 (4 Antenna by 16 Receiver) HF Receive Matrix

FEATURES

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


Introduction

     The Model RM-1 HF Receive Matrix is a full fan-out, nonblocking 50 Ohm RF switch matrix for connecting receiving antennas and communication receivers. The RM-1 provides highly reliable and flexible switching without receive signal degradation. The RM-1 is fully remote controllable with local control available. The matrix design provides low input/output VSWR and high channel to channel isolation.

Description

     The Model RM-1 HF Receive Matrix System is available in an eight antenna by eight receiver standard configuration or in a four antenna by sixteen receiver standard configuration. The RM-1 is an active, full fan-out, nonblocking switching matrix which distributes each antenna to multiple receivers without signal degradation. The design precludes the connection of multiple antennas to a single receiver.

     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, nonblocking 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 Vrms) 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 and Ethernet 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

     The RM-1 is available in the following standard sizes.

     8 Antenna by 8 Receiver: This configuration provides locally and remotely controlled RF 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 RF controlled switching between up to four antennas and up to sixteen receivers. Smaller antenna/receiver requirements can be accommodated by subequipping 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 (8 Antenna by 24 Receiver), the RM-1 (24 Antenna by 32 Receiver) and the RM-1 (24 Antenna by 64 Receiver). Consult the factory for specifications and capabilities.



Model RM-1 (8 Antenna X 24 Receiver) HF Receive Matrix System



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


Remote Control

     The RM-1 may be remotely controlled by either a Delta Model MCU-9 Matrix Control Unit or a customer supplied communication system computer/controller. The MCU-9 provides standard matrix control features such as receiver/antenna circuit display, and unavailable receiver/antenna circuit protection. The MCU-9 is available with an EIA RS-232 serial data interface to a customer's control system or computer. Optional RS-422 and Ethernet interfaces are available.

     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 two digit receiver numbers and two digit antenna numbers. 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.

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, odd or none
  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 Word Formats

     The control and status words received and transmitted by the RM-1 follow the format detailed below. All characters in the control and status words are ASCII characters. The format shown applies to the 4 Antenna by 16 Receiver configuration. Format for 8 Antenna by 8 Receiver configurationis similar except Complete Status Response reports 8 receivers. Although shown below with spaces between characters for clarity, all messages are transmitted without intervening spaces.

                  A.  Connect Command (Remote control system to RM-1):

                                    CR LF ADRS C R1 R2 A1 A2 X

                  B.   Disconnect Command (Remote control system to RM-1):

                                    CR LF ADRS D R1 R2 X

                  C.   Status Command (Remote control system to RM-1):

                                    CR LF ADRS S R1 R2 X

                  D.  Status Response (RM-1 to remote control system):

                                    CR LF ADRS S R1 R2 A1 A2 F M ETB

                  E.   Complete Status Command (Remote control system to RM-1):

                                    CR LF ADRS S A L L X

                  F.   Complete Status Response (RM-1 to remote control system):

                                    CR LF ADRS S R11 R12 A1 A2 R21 R22 A1 A2

                                                              R31 R32 A1 A2 R41 R42 A1 A2

                                                              R51 R52 A1 A2 R61 R62 A1 A2

                                                              R71 R72 A1 A2 R81 R82 A1 A2

                                                              R91 R92 A1 A2 R101 R102 A1 A2

                                                              R111 R112 A1 A2 R121 R122 A1 A2

                                                              R131 R132 A1 A2 R141 R142 A1 A2

                                                              R151 R152 A1 A2 R161 R162 A1 A2

                                                              RS AM PS F M ETB

The characters are defined as follows:

CR                         =          ASCII Carriage Return

LF                          =          ASCII Line Feed

ADRS                   =          RM-1 Address (Front Panel Selectable); Valid addresses are ASCII

                                          characters 0 through 9, A through F 

C                            =          Command Designator for Connect Message

D                           =           Command Designator for Disconnect Message

S                            =          Command Designator for Status Message

ALL                       =          ASCII Character String Meaning All Receivers

R1                          =          Most Significant Digit of Receiver Number

R2                          =          Least Significant Digit of Receiver Number

A1                          =          Most Significant Digit of Antenna Number

A2                          =          Least Significant Digit of Antenna Number

R11 thru R161         =          Most Significant Digit of Receivers 1 through 16, respectively

R12 thru R162         =          Least Significant Digit of Receivers 1 through 16, respectively

RS                         =          Receiver Selector Fault Digit 

AM                       =          Antenna Multicoupler Fault Digit 

PS                         =          Power Supply Control Fault Digit 

F                            =          Fault Digit

                                                            0 = No Fault

                                                            1 = Summary Fault

                                                            3 = Connection Fault

M                           =          Mode Digit

                                                            0 = Local Mode

                                                            1 = Remote Mode

X                            =          ASCII X to End Command Message

ETB                       =          ASCII End of Transmission Block to End Status Response


Matrix Control Software

     Remote control software which provides control, status display and diagnostic testing of the RM-1 is also available. In addition to providing all the basic control and status features of the MCU-9, the software enhances the control capabilities by using mouse-driven equipment selection routines and expands the display capabilities to include equipment labels. The program also provides diagnostic routines to automatically test remote matrix operation capabilities and to isolate faults to the line replaceable unit level. Preset switch configurations establishing multiple receiver/antenna connections may be defined, stored and automatically implemented. All switch configuration changes, status reports, and diagnostic test results may be logged on the system printer.

Installation Services and Logistic Data

      Installation services and logistic data are available for the Model RM-1 HF Receive Matrix. The installation services include site survey, system installation and site acceptance tests. The logistic data includes provisioning data, spare parts lists, factory training, reliability and maintainability analyses, safety studies, and technical manual documentation.

RM-1 SPECIFICATIONS

Standard Configurations: 8 Antennas by 8 Receivers or
4 Antennas by 16 Receivers

Switch Type:

Active Full Fan-Out Nonblocking

Characteristic Impedance:

50 Ohms

Frequency Range:

2 MHz to 32 MHz with standard bandpass filters
0.5 MHz to 32 MHz with optional  low pass filters

Insertion Gain:

1 dB 2 dB

Input/Output VSWR:

1.5:1 Maximum

Isolation:           

Input/Unselected Output:
Output/Unselected Input:
Output/Output (Common Input):
            Typical:
            Minimum:
Input/Input:

50 dB
60 dB

55 dB
45 dB
60 dB

Switching Speed:

50 ms Maximum

Noise Figure:

8 dB Maximum

Intermodulation Distortion:

Suppression of 2nd and 3rd order intermodulation products better than 50 dB below two 0 dBm signals

Maximum RF Input Signal:

1 Vrms (+13 dBm)

RF Contact Life:

>50 x 106 operations at +19 dBm signal levels

Filter Performance:

Standard Bandpass filter provides minimum of 60 dB rejection below 1.5 MHz and minimum of 40 dB rejection above 45 MHz. Optional Low Pass filter provides minimum of 40dB Rejection above 45 MHz 

RF Connectors:

Antennas:       Type N Receptacle
Receivers:      Type BNC Receptacle
Control:
Remote: Standard RS-232 Serial Data Interface
Optional RS-422 or Ethernet  Interface
Local Status Display:
40 characters by 4 line liquid crystal display (LCD) provides
tabular display of receiver and antenna status

Serial Data Interface:

RS-232 or RS-422, baud rate selectable in standard increments from 50 through 19200 baud.

Error Detection:

Parity, framing and overrun error detection prevents faulty operation of coaxial relay

Input Power:

120 VAC, 50/60 Hz @ 6.25 Amps
240 VAC, 50/60 Hz @ 3 Amps


Environmental:

Temperature, Operation: 0 to +50 C
Temperature, Storage: -30 to +71 C
Humidity: 0 to 95% noncondensing

Dimensions and Weight:

7" (178 mm) high x 19" (483 mm) wide x 24" (610 mm) deep, 37.25 pounds (16.9 kg)

For additional information on any of our products, please contact Sales to discuss your particular requirements:
Delta Electronics, Inc.
5730 General Washington Drive
P. O. Box 11268
Alexandria, VA 22312

Phone: (703) 354-3350
U.S. Toll Free: 1-800-8-DELTA-8 (1-800-833-5828)
Fax: (703) 354-0216
www.deltaelectronics.com
Email: sales@deltaelectronics.com

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