Alpha DOCSIS DM31 Bedienungsanleitung

1017-891-B12-001, Rev. A (02/2023)

DM31 DOCSIS®3.1 Transponder for XM3™Power Supply

Quick Start Guide

Introduction

This guide describes the DOCSIS Monitor 31 (DM31) transponder and provides procedures with regard to installation in

the XM3 series broadband uninterruptible power supply (UPS). This guide also provides steps to verify correct network

provisioning on the DOCSIS network. For detailed information, refer to the DM31 Technical Manual available at

www.alpha.com.

Audience

This guide is intended for experienced, qualified and licensed installation personnel familiar with the mechanical and

electrical requirements of enclosure and power supply systems. Review the support documentation on the website to

become familiar with the features and functions of the equipment in this system before proceeding. Failure to install

and/or use this equipment as instructed in the system documents can result in a hazard to personnel or damage to the

equipment. This system is only serviceable by qualified personnel.

Overview

The DM31 unit is a DOCSIS 3.1 transponder designed to provide status and alarms from the XM3 broadband UPS to a

network monitoring system. The DM31 transponder utilizes Simple Network Management Protocol (SNMP), standard

SCTE-HMS and Alpha Management Information Bases (MIBs) to provide network status monitoring and diagnostics. A

web interface enables authorized personnel direct access to advanced diagnostics using a common web browser. The

DM31 transponder is composed of the following:

Fig. 1, DM31 Transponder

LED Indicators

ALM/RDY DM31 ready, major/minor alarm DS Downstream RF carrier detection/lock

Rx/Tx PWR RF power level US Upstream RF carrier detection/lock

COM XM3 communications OL Registration lock

PWR DM31 power LNK Ethernet link

Ethernet Port

Thumbscrew

Environmental Port

Tamper Switch Connector

RF Connector

Required

Grounded Surge Protector

(Alpha p/n 162-028-10 or equivalent)

To HeadendRF Drop

COM

PWR

LNK

RX/TX

PWR

GRN = OK

BLU = WARN

RED = OUT

TPR

ALMRDY

TORQUE

10.0 IN-LB

11.5 kgf.cm

2017-891-B12-001, Rev. A (02/2023)

Installation / Replacement Procedure

Before removing the Inverter Module, verify the power supply device address is set to a valid number. Power supplies

must have 1, 2, 3, 4 or 5 as an address (not 0).

• To verify the power supply’s address, go to the LCD Smart Display on the inverter module and enter the

PWR CNFG menu.

• Scroll to the DEVICE ADDRESS menu item and verify the device address is set to something other than 0 (zero).

Removing the Inverter Module:

1. Turn off the battery breaker.

2. Disconnect the battery input and temperature sensor cables from the inverter module, followed by the tamper and RF

if a transponder is currently installed.

3. Loosen the thumbscrew on the XM3™ power supply inverter module and the thumbscrew on the transponder (if

applicable).

4. Grasp the handle on the bottom right side of the inverter module. Pull firmly to release the module from the inverter

connector. Gently slide the module assembly straight out until the inverter module is accessible.

5. If applicable, remove the

old transponder from the

inverter module.

6. The white stand-off on the

side of the inverter module

should be snipped off to

avoid interference with

the DM31 transponder

assembly (Fig. 2). Use wire

cutters to snip the stand-

off.

Fig. 2, Modifying Stand-off

For XM3™ power supplies in service, backup battery power will not be available during this

procedure.

NOTICE:

Service personnel must verify the inverter module battery breaker remains in the OFF position

until instructed to return the unit to service.

CAUTION!

Before clipped off

After clipped off

18-Pin Connector

Stand-off

Piece

To ease the installation

process, remove

the ribbon from the

transponder and

connect to the inverter.

Clip stand-off

Industry standard board replacement procedures should be followed. To reduce static, Alpha®

recommends the use of a static reducing wrist strap.

NOTICE:

3017-891-B12-001, Rev. A (02/2023)

7. Center and angle the latch

bracket tabs of the transponder

and insert them in the slots

as shown in Fig. 3. Lower the

transponder down so it's flush

with the bracket. Ensure the

PCBA slot is centered with the

18-pin connector (Fig. 4).

Fig. 3, Rear Bracket Connection

Fig. 5, Ribbon Cable Installation Fig. 6, RF Cable Installation

Fig. 4, Captive Screws

8. Fasten the transponder to the

Inverter Module by tightening

the two captive screws

(Fig. 4). It is recommended

that the screws be tightened

alternately, a few turns at a time,

so the transponder aligns in

parallel to the Inverter Module.

9. Install the 18-pin ribbon cable between the DM31 transponder and the inverter module (Fig. 5).

10. Reinstall the Inverter Module, tighten the two thumbscrews and reconnect the front panel connections (tamper,

temperature sensor, battery harness, etc.).

11. Verify the recording of the cable modem MAC address (RF MAC) by navigating to the XM3™ power supply Smart

Display’s COMM menu.

12. Connect the RF drop as shown in Fig. 6. The DOCSIS®specification for downstream power level is ±15 dBmV.

However, for optimal performance, set the level as close to 0 dBmV as possible. RF attenuators may be required to

obtain optimal downstream (receive) RF levels.

Required

Grounded Surge Protector

(Alpha p/n 162-028-10 or equivalent)

To HeadendRF Drop

COM

PWR

LNK

RX/TX

PWR

GRN = OK

BLU = WARN

RED = OUT

TPR

ALMRDY

TORQUE

10.0 IN-LB

11.5 kgf.cm RF Drop To Headend

Required

Ground Surge Protector

(Alpha p/n 162-028-10 or equivalent)

18-Pin

connector

Captive

screw

Captive

screw

4017-891-B12-001, Rev. A (02/2023)

Initial Power-Up and Test / Return Unit to Service

1. Plug the power supply into the AC outlet.

2. Switch battery breaker ON.

3. The transponder LED indicators will all blink in unison upon initial power up. The RDY indicator will then begin blinking

steadily indicating normal processor activity.

4. Verify the DS and OL indicators are on solid. This verifies the Communications Module has registered an IP address

on the network.

5. Verify the RF indicator is solid green, indicating Upstream and Downstream Power is within the default specified

range and the Upstream RF Power is below the recommended +50 dBmV (Table 1).

6. Verify no XM3™ power supply alarms are active.

Verify Communications

XM3 Power Supply Smart Display - COMM Menu

Verify the DM3.1 Series transponder communication parameters such as IP address, RF Power Levels and Signal/Noise

Ratio on the COMM menu of the XM3 power supply Smart Display. Press ENTR to open the COMM-GENERAL menu

enabling the operator to view values for communications parameters. Pressing the up or down arrow softkeys will show

two lines of information for each submenu item (Fig. 7).

Table 1, RF Power Default Values

RF Power Default Values

LED Color Rx Range (dBmV) Tx Range (dBmV)

Green +10 to -10 0 to +50

Blue +15 to +10 and -10 to -15 +50 to +55

Red >+15 and <-15 >+55

Fig. 7, COMM Status/Menu

COMMS STATUS/MENU

CM MAC ADDRESS

00:90:EA:A0:04:99

CM IP ADDRESS

192.168.1.121

CM IPV6 ADR PREFIX

2001:123:456:789

CM IPV6 ADR POSTFIX

111:222:333:3434

CPE MAC ADDRESS

00:90:EA:00:52:33

017-891-B12-001, Rev. A (02/2023)

Alpha Technologies Services, Inc. | 3767 Alpha Way, Bellingham, WA 98226, USA

Tel.: Toll Free North America: +1 800-322-5742 | Outside US: +1 360-647-2360 | Technical Support: +1 800-863-3364

For more information visit www.alpha.com

the property of EnerSys and its afliates except DOCSIS®, which is not the property of EnerSys.

Subject to revisions without prior notice. E.&O.E.

Local Web Server Access:

The connection may be tested by using a computer and a standard Ethernet cable. Connect the computer to the Ethernet

port on the transponder, launch a web browser (e.g. Chrome) and enter 192.168.100.1 in the address field. The "Overview"

page, as shown below, will appear and display connectivity, power levels and power supply status information such as

alarms, output voltage, output current and individual battery voltages. System Name, System Location, System Contact

and Common Logical ID may be edited on this page; when prompted for a User Name and Password, use “Alpha” and

“AlphaGet”.

Remote Web Server Access:

Connect the computer to the cable modem network, launch an web browser (e.g. Chrome) and enter the designated

transponder IP address in the address field. The "Overview" page will appear (Fig. 8).

Fig. 8, Remote Server Web Page - Overview

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