ASM-10/8 Short Range Modem Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications. No part of this publication may be reproduced in any form whatsoever without prior written approval by RAD Data Communications. No representation or warranties for fitness for any purpose other than what is specifically mentioned in this manual is made either by RAD Data Communications or its agents.
Warranty This RAD product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, RAD will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by RAD. Buyer shall prepay shipping charges to RAD and RAD shall pay shipping charges to return the product to Buyer.
Safety Warnings The exclamation point within a triangle is intended to warn the operator or service personnel of operation and maintenance factors relating to the product and its operating environment which could pose a safety hazard. Always observe standard safety precautions during installation, operation and maintenance of this product. Only a qualified and authorized service personnel should carry out adjustment, maintenance or repairs to this instrument.
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: Product Name: ASM-10/8 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. Perform the following steps for both the local and the remote units: QS.1 Installing ASM-10/8 Switch and Jumper Settings 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 Jumper Possible Settings Default Setting RPF ON ON OFF PIN 18 EN EN DIS PIN 21 EN EN DIS CHAS GND CONN CONN DIS RCV IMPD 150 150 300 600 HIGH CTS-DLY 0 msec 8 msec 8 msec 64 msec 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 – 1.2 XMT TIMING INT CK INT CK EXT CK RCV CK ASYNC V.
ASM-10/8 Installation and Operation Manual Connecting the Interfaces Quick Start Guide Connecting the Line ➤ To connect the line: 1. Connect the transmit pair to the terminals marked XMT. 2. Connect the receive pair to the terminals marked RCV. 3. Connect the ground wire to the terminal designated GND (optional). Connecting the DTE ➤ To connect the DTE: • Connect the DTE to the DTE connector on the rear panel of ASM-10/8. Connecting the Power ➤ To connect the power: 1.
Quick Start Guide 4 Operating ASM-10/8 ASM-10/8 Installation and Operation Manual
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Chapter 1 Introduction This chapter describes the basic physical and functional features of the ASM-10/8 short-range modem, as well as some typical applications. It discusses the following topics: • An overview of the modem • Physical description • Functional description • Technical specifications. 1.1 Overview General 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 Installation and Operation Manual Chapter 1. Introduction Applications The following diagrams illustrate the ASM-10/8 in a variety of configurations: • Point-to-point applications • Multipoint applications • Tail-end for DDS service applications • Star applications. 4-wire up to 55 km ASM-10/8 1.2 - 38.
ASM-10/8 Installation and Operation Manual ASM-10/8 EXT CLK V.54 DLY-ON Chapter 1. Introduction Digital Service Network ASM-10/8 EXT CLK V.54 DLY-ON ASM-10/8 ASM-10/8 RCV CLK V.54 DLY-OFF RCV CLK V.54 DLY-OFF Figure 1-3 ASM-10/8 Tail-End for DDS Service Application ASM-10/8 Slave ASM-10/8 Master ASM-10/8 Slave ASM-10/8 Slave Figure 1-4 ASM-10/8 Star Application Note Features In the star application, set the XMT and RCV impedance of all the modems to 150W.
ASM-10/8 Installation and Operation Manual Chapter 1. Introduction ASM-10/8 communicates over lines in synchronous mode only. When set to the asynchronous mode, ASM-10/8 performs an asynchronous to synchronous conversion in compliance with ITU V.14 bis standard. The unit has line protection circuits against lightning and power surges. ASM-10/8 V.
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 hub. Figure 1-5 shows the 3D view of the ASM-10/8 standalone unit. Figure 1-5 ASM-10/8 Standalone Unit 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 General 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). Encoder The encoder modulates the input data from the DTE using the conditional diphase modulation technique.
ASM-10/8 Installation and Operation Manual Receiver Chapter 1. Introduction The receiver comprises several circuits, as shown in the block diagram, Figure 1-6. • The receive filter removes all the out-of-band frequencies. • The automatic equalizer comprises several equalizers which are activated according to baud rate. • The digital AGC automatically compensates for the attenuation of the line.
ASM-10/8 Installation and Operation Manual Chapter 1. Introduction ASM-10/8 Block Diagram Figure 1-6 shows the ASM-10/8 internal circuitry. RTS CTS ENCODER CONTROL TXC EXT.
ASM-10/8 Installation and Operation Manual Chapter 1. Introduction 1.4 Technical Specifications Transmission Line Digital Interface V.
ASM-10/8 Installation and Operation Manual Chapter 1. Introduction Physical ASM-10/8/SA Modem Height 43 mm / 1.7 in Width 215 mm / 8.5 in Depth 243 mm / 9.5 in Weight 956g ASM-10/8/R Card Fits one slot of the ASM-MN-214 hub Power / 2.1 lb 110, 115 or 230 VAC (±10%); 47 to 63 Hz Power Consumption 3W Fuses • 0.25A/250V (115 VAC) • 0.125A/250V (230 VAC) Protection AC/DC overvoltage protection circuits are connected via transformers to transmit and receive lines.
Chapter 2 Installation and Setup This chapter provides the following information for the ASM-10/8 standalone model: • Site requirements and prerequisites • Package contents • Instructions for mechanical installation • Instructions for electrical installation. After installing the unit, refer to Chapter 3 to assure normal operation. In case a problem encountered, refer to Chapter 4 for test and diagnostic instructions. 2.
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. For installation of the unit in a 19" rack, refer to Appendix B. ➤ To complete the installation of ASM 10/8: Setting the Internal Jumpers 1.
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.
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 16 Values ON – 25% Configuration Considerations OFF OFF – 12.5% Selects character length in async mode S3 V.
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.
ASM-10/8 Installation and Operation Manual Chapter 2. Installation and Setup ➤ 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. Use only XMT pair for 2-wire operation. Note 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.
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