Installation and Operation Manual ASM-10/8 Short Range Modem
ASM-10/8 Short Range Modem Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications Ltd. ("RAD"). No part of this publication may be reproduced in any form whatsoever without prior written approval by RAD Data Communications.
Limited Warranty RAD warrants to DISTRIBUTOR that the hardware in the ASM-10/8 to be delivered hereunder shall be free of defects in material and workmanship under normal use and service for a period of twelve (12) months following the date of shipment to DISTRIBUTOR.
General Safety Instructions The following instructions serve as a general guide for the safe installation and operation of telecommunications products. Additional instructions, if applicable, are included inside the manual. Safety Symbols Warning This symbol may appear on the equipment or in the text. It indicates potential safety hazards regarding product operation or maintenance to operator or service personnel.
Handling Energized Products General Safety Practices Do not touch or tamper with the power supply when the power cord is connected. Line voltages may be present inside certain products even when the power switch (if installed) is in the OFF position or a fuse is blown. For DC-powered products, although the voltages levels are usually not hazardous, energy hazards may still exist.
Connection of Data and Telecommunications Cables Data and telecommunication interfaces are classified according to their safety status. The following table lists the status of several standard interfaces. If the status of a given port differs from the standard one, a notice will be given in the manual. Ports Safety Status V.24 SELV Safety Extra Low Voltage: Ports which do not present a safety hazard. Usually up to 30 VAC or 60 VDC.
Caution Attention To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cords. Pour réduire les risques s’incendie, utiliser seulement des conducteurs de télécommunications 26 AWG ou de section supérieure. Some ports are suitable for connection to intra-building or non-exposed wiring or cabling only. In such cases, a notice will be given in the installation instructions. Do not attempt to tamper with any carrier-provided equipment or connection hardware.
Canadian Emission Requirements This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulation. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. Warning per EN 55022 (CISPR-22) Warning This is a class A product. In a domestic environment, this product may cause radio interference, in which case the user will be required to take adequate measures.
Declaration of Conformity Manufacturer's Name: RAD Data Communications Ltd. Manufacturer's Address: 24 Raoul Wallenberg St. Tel Aviv 69719 Israel declares that the product: ASM-10/8 Product Name: conforms to the following standard(s) or other normative document(s): EMC: Safety: EN 55022 (1994) Limits and methods of measurement of radio disturbance characteristics of information technology equipment.
Quick Start Guide Installation of ASM-10/8 should be carried out only by an experienced technician. If you are familiar with ASM-10/8, use this quick start guide to set it up for operation. This guide describes the standalone version of the modem. Perform the installation procedures for both the local and the remote units. 1. Installing ASM-10/8 Set the ASM-10/8 internal jumpers and switches correctly for the chosen operating mode. Refer to the table below for the possible settings.
ASM-10/8 Installation and Operation Manual Quick Start Guide Item Jumper Description 5 Selects the transmit output level to the 0 dbm line -3 dbm XMT LEVEL Values Default Setting 0 dbm -6 dbm -9 dbm 6 XMT IMPD Selects transmit line impedance 600 300 150 150 LOW Note: Set XMT IMPD to LOW when using ASM-10/8 in multipoint applications.
ASM-10/8 Installation and Operation Manual Quick Start Guide Item Jumper Description Values 12 Selects delay between RTS and CTS 0 msec CTS-DLY Default Setting 8 msec 8 msec 64 msec 13 Data Rate Selects the data rate 0 – 19.2 1 – 14.4 2 – 9.6 9.6 3 – 7.2 4 – 4.8 5 – 3.6 6 – 2.4 7 – 1.
ASM-10/8 Installation and Operation Manual Quick Start Guide Connecting the Power To connect AC power to ASM-10/8: 1. Connect the power cable to the power connector on the ASM-10/8 rear panel. 2. Connect the power cable to the mains outlet. The unit turns on automatically upon connection to the mains. To connect DC power to ASM-10/8: • 2. Refer to DC Power Supply Connection Supplement. Operating ASM-10/8 ASM-10/8 does not require operator attention once installed and configured.
Contents Chapter 1. Introduction 1.1 Overview..................................................................................................................... 1-1 Versions................................................................................................................................ 1-1 Applications.......................................................................................................................... 1-1 Features.........................................................
Table of Contents 5.3 ASM-10/8/R Front Panel .............................................................................................. 5-4 5.4 Installing the ASM-10/8/R Card .................................................................................... 5-6 Setting Internal Jumpers and Switches ................................................................................... 5-6 Installing ASM-10/8/R into the ASM-MN-214 Card Cage .......................................................
Chapter 1 Introduction 1.1 Overview ASM-10/8 is a short-range modem, which operates over unconditioned lines. It can function in full or half-duplex mode with synchronous or asynchronous transmission format. ASM-10/8 has an extended range of up to 28 km (17.4 miles) on 24 AWG wire, and more depending on wire gauge and data rate (see Table 1-1). It operates at eight selectable rates ranging from 1.2 kbps to 19.2 kbps.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction XMT Pair RCV Pair ASM-10/8 ASM-10/8 Slave 1 XMT Impedance – 150Ω RCV Impedance – High Master XMT Impedance – LOW RCV Impedance – 150Ω ASM-10/8 Slave 2 XMT Impedance – 150Ω RCV Impedance – High ASM-10/8 Slave 3 XMT Impedance – 150Ω RCV Impedance – High ASM-10/8 Slave N XMT Impedance – 150Ω RCV Impedance – High Figure 1-2.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction ASM-10/8 Slave ASM-10/8 Master ASM-10/8 Slave ASM-10/8 Slave Figure 1-4. Star Application Note In the star application, set the XMT and RCV impedance of all the modems to 150Ω. Features The ASM-10/8 modem uses conditioned differential diphase modulation (EUROCOM Std. D1) to provide protection from background noise, eliminate normal line distortion and permit efficient transmission and reception of serial data over twisted pair cable.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction Transmission Range Table 1-1 lists the ASM-10/8 approximate transmit ranges over 19 AWG, 24 AWG and 26 AWG wires. Table 1-1. ASM-10/8 Transmission Ranges Data Rate 19 AWG (0.9 mm) 24 AWG (0.5 mm) 26 AWG (0.4 mm) [kbps] km miles km miles km miles 19.2 22.5 14.0 10.0 6.2 7.5 4.7 14.4 24.5 15.3 11.0 6.9 8.2 5.1 9.6 29.0 18.1 13.0 8.1 9.5 5.9 7.2 33.0 20.5 15.0 9.4 11.0 6.9 4.8 36.0 22.5 16.0 10.0 12.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction 1.2 Physical Description ASM-10/8 is available as a standalone desktop unit or as a card for the ASM-MN-214 modem rack. Figure 1-5 shows the 3D view of the ASM-10/8 standalone unit. Figure 1-5. ASM-10/8, 3D View The front panel includes six LEDs, which display the status of power, data flow, control signals and diagnostics. Three front-panel switches control the three loopback modes.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction 1.3 Functional Description This section contains functional descriptions of the circuit blocks of ASM-10/8, primarily those circuits which are required for setting the desired modem configuration (see Figure 1-6). RTS CTS ENCODER CONTROL TXC EXT.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction Modulation Timing This circuit supplies the transmit clock signal to the encoder. The following clock sources are available: • INT.CK (internal clock) – from the modem's internal crystal oscillator) • EXT.CK (external clock) – from DTE, pin 24 • RCV.CK (receive clock) – recovered from the received signal • ASYNC – asynchronous timing for working with the async to sync converter in asynchronous applications.
Chapter 1 Introduction ASM-10/8 Installation and Operation Manual Remote Power Failure (RPF) Indication The Remote Power Failure feature notifies the user at a central location of a power failure in a remote modem. The remote power failure feature can be configured only when the ASM-10/8 standalone unit (remote) operates in conjunction with the rack-mounted card ASM-10/8/R (central).
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction 1.4 Technical Specifications Line Interface Type Connector 5-screw terminal block Range See Table 1-1 Level 0 dBm, -3 dBm, -6 dBm, -9 dBm Transmit Impedance User-selectable: 150, 300, 600Ω, LOW Receive Impedance User-selectable: 150, 300, 600Ω, HIGH Return Loss Greater than 15 dB Carrier Controlled by RTS or constantly ON Modulation Differential diphase (Eurocom Std.
ASM-10/8 Installation and Operation Manual Chapter 1 Introduction Physical Power ASM-10/8 Height 43 mm / 1.7 in Width 215 mm / 8.5 in Depth 243 mm / 9.5 in Weight 956g ASM-10/8/R Fits one slot of the ASM-MN-214 modem rack AC 115 or 230 VAC (±10%), 47 to 63 Hz DC 18 to 60 VDC Power Consumption 3W Fuses 0.25A/250V (115 VAC) / 2.1 lb 0.
Chapter 2 Installation and Setup This chapter describes installation and setup procedures for the standalone ASM-10/8 modem. ASM-10/8 is delivered completely assembled. It is designed for tabletop or 19-inch rack installation. For instructions on installation of a single unit or two units in a 19-inch rack, refer to the Rack Mounting Kit for 19-inch Racks guide that comes with the RM kit. After installing the unit, refer to Chapter 3 to assure normal operation.
Chapter 2 Installation and Setup ASM-10/8 Installation and Operation Manual 2.3 Installation and Setup ASM-10/8 is a standalone device intended for tabletop or bench installation. It is delivered completely assembled. No provisions are made for bolting the ASM-10/8 to the tabletop. To install ASM-10/8: 1. Determine the required configuration of the modem according to your application, and set the internal jumpers and switches accordingly (see Figure 2-1 and Table 2-1). 2.
ASM-10/8 Installation and Operation Manual Chapter 2 Installation and Setup Opening the ASM-10/8 Case To reach the internal jumpers and switches of ASM-10/8, it is necessary to open its case. To open the ASM-10/8 case: 1. Disconnect all the cables connected to ASM-10/8. 2. Turn the unit over (bottom facing up). 3. Unscrew the four cover screws. 4. Turn the unit over (bottom facing down). 5. After the four screws released, remove the ASM-10/8 top cover by pulling it straight up.
ASM-10/8 Installation and Operation Manual Chapter 2 Installation and Setup Table 2-1.
ASM-10/8 Installation and Operation Manual Chapter 2 Installation and Setup Table 2-1. ASM-10/8 Internal Jumpers and Switches (Cont.
ASM-10/8 Installation and Operation Manual Chapter 2 Installation and Setup Table 2-1. ASM-10/8 Internal Jumpers and Switches (Cont.) Item Jumper Description 15 DIP Switch The DIP switch consists of four sections. The S1 section is reserved for future use. S2 Selects the amount of stop bit shortening to be used in async mode. S3, S4 Values Default Setting ON – 25% OFF OFF – 12.
ASM-10/8 Installation and Operation Manual Chapter 2 Installation and Setup Table 2-3. AGC and CTS Delay Settings for Long-Range Applications Range Rate Long or uneven distances between master and slave modems AGC Setting CTS Delay Setting ON (master and slave) 0 msec (master) Above 9.6 kbps 8 msec (slave) Below 9.6 kbps 64 msec (slave) Setting the Async Character Length Table 2-4 lists the character length values in the asynchronous mode. Table 2-4.
Chapter 2 Installation and Setup ASM-10/8 Installation and Operation Manual To connect the line: 1. Connect the ground wire to the terminal designated GND (optional). 2. Connect the transmit pair to the terminals marked XMT. 3. Connect the receive pair to the terminals marked RCV. Note Use only XMT pair for 2-wire operation. Connecting the DTE The rear-panel DTE connector provides interface for data input/output, clock reference and control signal exchange between ASM-10/8 and the DTE.
Chapter 3 Operation This chapter provides the following information for the ASM-10/8 standalone modem: • ASM-10/8 front-panel indicators and controls • Operating procedures (turn-on, front-panel indications, performance monitoring and turn-off). Installation procedures given in Chapter 2 must be completed and checked before attempting to operate ASM-10/8. 3.1 Front Panel Controls and Indicators Figure 3-1 shows the ASM-10/8 front panel. Table 3-1 lists the ASM-10/8 controls and indicators.
ASM-10/8 Installation and Operation Manual Chapter 3 Operation Table 3-1. ASM-10/8 Front Panel Controls and Indicators (Cont.) Name Type Function DIG Pushbutton The digital loopback pushbutton causes the local ASM-10/8 to loop received data to its transmitter (see Figure 4-3). ANA Pushbutton The local loopback (V.54 loop 3) pushbutton causes the local ASM-10/8 to loop its transmitter output back to its receiver (see Figure 4-1).
ASM-10/8 Installation and Operation Manual Chapter 3 Operation Normal Indications Table 3-2 shows the correct status of the ASM-10/8 indicators after the local and remote modem are synchronized and data is being transferred. Table 3-2.
Chapter 3 Operation 3-4 Operating ASM-10/8 ASM-10/8 Installation and Operation Manual
Chapter 4 Diagnostics This chapter contains procedures for performing system diagnostic tests for ASM-10/8. Use the test procedures provided in this chapter to: • Verify normal system operation • Isolate faulty equipment • Identify other sources of system malfunction. The tests are activated by control pushbuttons on the ASM-10/8 front panel and monitored via LED indicators. For description of ASM-10/8 controls and indicators and their functionality, see Chapter 3. 4.1 V.
ASM-10/8 Installation and Operation Manual Chapter 4 Diagnostics Local Analog Loopback (LLB) The local analog loopback (LLB) test checks the performance of the local ASM-10/8 modem, the local DTE, and the connections between them (see Figure 4-1). The test is performed separately at the local and the remote site. ANA Depressed Data Clock Transmit Line Interface DTE Clock Data Receive ASM-10/8 Figure 4-1. Local Analog Loopback To perform the local analog loopback test: 1. Press the ANA pushbutton.
ASM-10/8 Installation and Operation Manual Chapter 4 Diagnostics Remote Digital Loopback (RLB) The remote digital loopback (RLB) test checks the performance of the local and the remote ASM-10/8 units and their connecting lines. The remote digital loopback sets a loop at the remote ASM-10/8 unit from the DTE coupled to the local unit (see Figure 4-2).
ASM-10/8 Installation and Operation Manual Chapter 4 Diagnostics Local Digital Loopback (DIG) The local digital loopback (DIG) test allows the operator at the remote end to check the performance of the local and remote ASM-10/8 units, and their connecting lines. The DIG test loops the received data back to the remote ASM-10/8 (see Figure 4-3). The local digital loopback test is equivalent to activating the remote loopback from the remote ASM-10/8.
Chapter 5 ASM-10/8/R Card Version This chapter describes the ASM-10/8/R card, designed for installation in the ASM-MN-214 card cage. The chapter contains the following sections: • The ASM-MN-214 card cage • ASM-MN-214 power supply • The ASM-10/8/R front panel • Installing the ASM-10/8/R card. 5.1 ASM-MN-214 Card Cage The ASM-MN-214 card cage contains one or two power supplies and up to 14 plug-in cards.
Chapter 5 ASM-10/8/R Card Version ASM-10/8 Installation and Operation Manual Terminal Block Figure 5-1.
ASM-10/8 Installation and Operation Manual Chapter 5 ASM-10/8/R Card Version 5.2 Power Supply Power is supplied to the ASM-10/8/R card from the ASM-MN-214 power supply via the chassis. Each ASM-10/8/R card has two fuses, which protect the entire system against power failure resulting from a short circuit in one card. The ASM-MN-214 card cage can accept both AC or DC power supplies.
ASM-10/8 Installation and Operation Manual Chapter 5 ASM-10/8/R Card Version 5.3 ASM-10/8/R Front Panel Figure 5-2 shows the ASM-10/8/R card front panel. The LEDs and pushbuttons of the card version are identical in their functionality to those of the standalone device. For this information, refer to Chapter 3. The ASM-10/8/R front panel features one additional LED indicator (RPF) and one additional pushbutton (RPF).
ASM-10/8 Installation and Operation Manual Chapter 5 ASM-10/8/R Card Version Figure 5-3.
Chapter 5 ASM-10/8/R Card Version ASM-10/8 Installation and Operation Manual 5.4 Installing the ASM-10/8/R Card Setting Internal Jumpers and Switches The ASM-10/8/R internal jumpers and switches are similar in their functionality to those of the standalone unit. For the details on the internal settings, refer to Figure 2-1 and Table 2-1. Installing ASM-10/8/R into the ASM-MN-214 Card Cage To install the ASM-10/8/R card in the ASM-MN-214 card cage: 1. Install the ASM-MN-214 card cage in the 19-inch rack.
Appendix A Connector Wiring A.1 DTE Interface Pin Assignment The V.24/RS-232 DTE interface of ASM-10/8 terminates in DB-25 female connector, wired in accordance with Table A-1. Table A-1. V.24/RS-232 Connector Pinout V.24 RS-232 DTE Pin Signal Identity Description 101 AA 1 Protective Ground Chassis ground. May be isolated from Signal Ground (refer to the CHAS GND jumper description in Table 2-1). 102 AB 7 Signal Ground Common signal and DC power supply ground.
ASM-10/8 Installation and Operation Manual Appendix A Connector Wiring Table A-1. V.24/RS-232 Connector Pinout (Cont.) V.24 RS-232 DTE Pin Signal Identity Description 115 DD 17 Receiver Signal A receive data rate clock output for use by external data sink. Positive clock transitions correspond to data transitions. 142 25 Test Indicator A positive control signal output from ASM-10/8 during any test mode.
DC Power Supply Connection – Terminal Block Connector Note: Ignore this supplement if the unit is AC-powered. Certain DC-powered units are equipped with a plastic 3-pin VDC-IN power input connector, located on the unit rear panel. Supplied with such a unit, is a mating Terminal Block (TB) type connector plug for attaching to your power supply cable. Connect the wires of your power supply cable to the TB plug, according to the voltage polarity and assembly instructions provided below.
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