Comtech EF Data RCF6001 User Manual

RCF6001

C- or Ku-Band

Satellite Terminal

Installation and Operation Manual

TM082 Rev. 1.0

September, 1999

- NOTICE -

1999, Radyne ComStream Corporation. This manual may not in
whole or in part be copied, reproduced, translated or reduced to any
electronic or magnetic storage medium without the written consent
of a duly authorized officer of Radyne Corporation.

Radyne ComStream Corporation • 3138 E. Elwood St. • Phoenix, AZ 85034 • [phone] • Fax: [phone]

RCF6001 Satellite Terminal Warranty Policy

RADYNE COMSTREAM WARRANTY POLICY

Warranty and Service

Radyne ComStream (hereafter referred to as Radyne or Seller) warrants the items manufactured and
sold by Radyne to be free of defects in material and workmanship for a period of two (2) years from date
of shipment. Radyne's obligation under its warranty is limited in accordance with the periods of time and
all other conditions stated in all provisions of this warranty. This warranty applies only to defects in
material and workmanship in products manufactured by Radyne. Radyne makes no warranty
whatsoever concerning products or accessories not of its manufacture. Repair, or at Radyne's option,
replacement of the Radyne products or defective parts therein shall be the sole and exclusive remedy for
all valid warranty claims.

Warranty Period

The applicable warranty period shall commence on the date of shipment from Radyne's facility to the
original purchaser and extend for the stated period following the date of shipment. Upon beginning of
the applicable Radyne warranty period, all customer's remedies shall be governed by the terms stated or
referenced in this warranty. In-warranty repaired or replacement products or parts are warranted only for
the remaining unexpired portion of the original warranty period applicable to the repaired or replaced
products or parts. Repair or replacement of products or parts under warranty does not extend the
original warranty period.

Warranty Coverage Limitations

The following are expressly not covered under warranty:

1. Any loss, damage and/or malfunction relating in any way to shipping, storage, accident, abuse,
alteration, misuse, neglect, failure to use products under normal operating conditions, failure to use
products according to any operating instructions provided by Radyne, lack of routine care and
maintenance as indicated in any operating maintenance instructions, or failure to use or take any proper
precautions under the circumstances.

2. Products, items, parts, accessories, subassemblies, or components which are expendable in normal
use or are of limited life, such as but not limited to, bulbs, fuses, lamps, glassware, etc. Radyne reserves
the right to revise the foregoing list of what is covered under this warranty.

Warranty Replacement and Adjustment

Radyne will not make warranty adjustments for failures of products or parts which occur after the
specified maximum adjustment period. Unless otherwise agreed, failure shall be deemed to have
occurred no more than seven (7) working days before the first date on which a notice of failure is
received by Radyne. Under no circumstances shall any warranty exceed the period stated above unless
expressly agreed to in writing by Radyne.

Liability Limitations

This warranty is expressly in lieu of and excludes all other express and implied warranties, including but
not limited to warranties of merchantability and of fitness for particular purpose, use, or applications, and
all other obligations or liabilities on the part of Radyne, unless such other warranties, obligations, or
liabilities are expressly agreed to in writing by Radyne.

All obligations of Radyne under this warranty shall cease in the event its products or parts thereof have
been subjected to accident, abuse, alteration, misuse or neglect, or which have not been operated and
maintained in accordance with proper operating instructions.

In no event shall Radyne be liable for incidental, consequential, special or resulting loss or damage of
any kind howsoever caused. Radyne’s liability for damages shall not exceed the payment, if any,

TM082- Rev. 1.0 ii

Warranty Policy RCF6001 Satellite Terminal

received by Radyne for the unit or product or service furnished or to be furnished, as the case may be,
which is the subject of claim or dispute.

Statements made by any person, including representatives of Radyne, which are inconsistent or in
conflict with the terms of this warranty, shall not be binding upon Radyne unless reduced to writing and
approved by an officer of Radyne.

Warranty Repair Return Procedure

Before a warranty repair can be accomplished, a Repair Authorization must be received. It is at this time
that Radyne will authorize the product or part to be returned to the Radyne facility or if field repair will be
accomplished. The Repair Authorization may be requested in writing or by telephoning:

Radyne ComStream Corporation

3138 E. Elwood St.
Phoenix, Arizona 85034 (USA)
Attn: Customer Service
Phone: [phone] Fax: [phone]

Any product returned to Radyne for examination must be sent prepaid via the means of transportation
indicated as acceptable to Radyne. Return Material Authorization (RMA) Number must be clearly
marked on the shipping label. Returned products or parts should be carefully packaged in the original
container, if possible, and unless otherwise indicated, shipped to the above address.

Non-Warranty Repair

When a product is returned for any reason, Customer and its shipping agency shall be responsible for all
damage resulting from improper packing and handling, and for loss in transit, not withstanding any defect
or nonconformity in the product. By returning a product, the owner grants Radyne permission to open
and disassemble the product as required for evaluation. In all cases, Radyne has sole responsibility for
determining the cause and nature of failure, and Radyne's determination with regard thereto shall be
final.

TM082 - Rev. 1 iii

RCF6001 Satellite Terminal Record of Revisions

RCF6001 C- or Ku-Band Satellite Terminal

Installation and Operation Manual

TM082 - Record of Revisions

Radyne Corporation is constantly improving its products and therefore the information in this document is
subject to change without prior notice. Radyne Corporation makes no warranty of any kind with regard to
this material, including but not limited to the implied warranties of merchantability and fitness for a
particular purpose. No responsibility for any errors or omissions that may pertain to the material herein is
assumed. Radyne Corporation makes no commitment to update nor to keep current the information
contained in this document. Radyne Corporation assumes no responsibility for use of any circuitry other
than the circuitry employed in Radyne Corporation’s systems and equipment.

Revision

Level

1.0 9-10-99 Initial Release

Date Reason for Change

TM082 - Rev. 1.0 iv

RCF6001 Satellite Terminal Table of Contents

TM082 - Rev. 1.0 iv

RCF6001 Satellite Terminal Description

Section One – RCF6001 Satellite Terminal Description

1.0 Introduction

The RCF6001 is a C- or Ku-Band Satellite Terminal that consists of a Radyne ComStream DMD2401LBST
Satellite Modem, Block Upconverter (BUC) and Low Noise Block (LNB). The system is available in a
variety of frequencies and power levels. Cabling and
antennas can also be supplied for a single source
solution.

The frequency agile DMD2401 LBST is the heart of the
RCF6001 system. The DMD2401LBST modem supplies
an L-Band output frequency of 950-1525 MHz.
The modem also supplies power and a high stability 10
MHz reference signal through the center conductor of
the transmit and receive cables. This design eliminates
the use of an outdoor power supply and diplexer. The
LBST controls all parameters of the outdoor units
remotely or via the front panel of the modem. The
modulator and demodulator operate independently
using BPSK and QPSK modulation in either SCPC or
VSAT modes.

• Complete C- or Ku-Band Satellite Terminal
System

• Optional Antennas and Cabling

• Modem with Power and High-Stability

Reference (10 MHz) to Outdoor RF Units

• BPSK and QPSK Operation

• 9.6 to 4375 Kbps Operation

Highlights

The Block Upconverter (BUC) comes in a variety of frequencies and power levels. The BUC is based on a
simple block conversion with an L-Band input and a C- or Ku-Band output. A single LO does the
conversion from L-Band to the desired output frequency. The output power levels that are available for C­Band BUCs are 5, 10, 20 and 40 watts. The available power levels for the Ku-Band BUCs are 2, 4, 8, 16
and 25 watts.

The Low Noise Block (LNB) comes in a variety of frequencies and power levels. The Low Noise Block does
a single LO conversion from C- or Ku-Band to an L-Band output. Typical gain of an LNB is 60 dB.

2.0 DMD2401 LB/ST Satellite Modem

The Radyne Corporation DMD2401 LB/ST L-Band Satellite Modem and Outdoor Unit (ODU) Driver is a
microprocessor-controlled Binary Phase Shift Keyed (BPSK) or Quadrature Phase Shift Keyed (QPSK),
Modulator and Demodulator for use as part of the transmitting and receiving ground equipment in a
satellite communications system. The DMD2401 LB/ST has the capability of delivering power and a 10
MHz Reference signal to a Low Noise Block Downconverter (LNB) and also to a Block Upconverter (BUC)
capable of an 8-Watt output. The DMD2401 LB/ST Modem is referred to as the “modem” or DMD2401
throughout the remainder of this document.

This versatile equipment package combines unsurpassed performance with numerous user-friendly front
panel programmable functions. All of the configuration, monitor and control functions are available at the
front panel. Operating parameters such as variable data rates, FEC code rate and IF/RF frequencies can
be readily set and reconfigured from the front panel by earth station operations personnel. Additionally, all
functions can be accessed with a terminal or personal computer via a serial link for complete remote
monitor and control capability.

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Description RCF6001 Satellite Terminal

The DMD2401 LB/ST operates at data rates up to 4.375 Mbps. Selection of any data rate is provided over
the range of 9.6 Kbps to 4.375 Mbps in 1 bps steps.

The DMD2401 LB/ST is designed to perform as both ends of a satellite Single Channel Per Carrier (SCPC)
link or as the VSAT remote site modem in a TDMA hub system. The Modulator and Demodulator operate
independently using BPSK or QPSK modulation in either SCPC or VSAT modes.

The DMD2401 LB/ST is programmable from the front panel. The program menu was specifically designed
for ease of use to quickly put the modem online and for any network changes. The modem also can be
monitored and controlled through the RS485 or RS232 serial control channel.

Figure 1-1. DMD2401 LB/ST Satellite Modem Front Panel

Available options for the DMD2401 LB/ST include a low data rate asynchronous serial overhead channel
for remote monitor and control. Additionally, a Reed-Solomon codec is available for applications requiring
Bit Error Rates of 10

-10

.

1.1 Applications

Following are just a few representative forms of satellite communications links and networks in which the
DMD2401 LB/ST modem may be used.

1.1.1 SCPC Point-to-Point Links

The most straightforward application for a satellite modem is to serve as the Data Communications
Equipment (DCE) for a point-to-point data link. When used in this mode, two modems located at two
different sites are tuned to complementary transmit and receive frequencies. Each direction of the
communications link may have the same or entirely different transmission parameters. In this application, it
is typical that the link is established and maintained on a continuous basis, although a special “on demand”
case is described later.

1.1.2 SCPC Point to Multi–Point Links in a Broadcast Application

A broadcast application might involve the necessity of sending continuous or intermittent data from one
source and “broadcasting” the information to many remote locations. For instance, constant pricing
information and updates may be sent by a central location to many store locations. There may be minor
return information from the remotes acknowledging receipt.

Another broadcast application could be transmitting background music from a central location to many
store sites. In this case, there would be no return path.

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RCF6001 Satellite Terminal Description

The topology of the network in both of these broadcast examples would typically be called a “Star” network.
As shown in the Figure below, the shape of the configuration is drawn with the central “Hub” as the center
of the star and the remotes as points of the star. In both cases the transmit frequency and other parameters
are shared by the receiver of all the remotes.

Star Network Configuration

Remote
B

Remote

Remote
C

A

Hub

Remote
E Remote

D

1.1.3 DAMA (Demand Assigned Multiple Access)

Suppose that we wanted to simulate a telephone network with a virtual switch between modems carrying
digitized voice information. We might use a central computer to assign a pair of frequencies for any
conversation and send this connection information to the proper sites to set up the connection. In this
application a new network configuration is usable. That is a “Mesh” network where any of the voice
modems at any site can be programmed to link with any other modem. The resulting link diagram looks
like a mesh of interconnects.

Since the frequencies can be assigned on demand, the network is then called “Demand Assigned, Multiple

1.1.4 TDMA (Time Division Multiple Access) Remote Site Application

In a TDMA network, the central Hub continually transmits a stream of outbound data containing information
for multiple remote sites, while the remote sites transmit back to the Hub on a timed basis. Each of these
remotes is said to “burst” its information back on a specific frequency. This may be the same inbound
frequency for all sites. Each of the remotes is responsible for accessing its own information from the
outbound data stream by reading the address assigned to specific parts of the data. The TDMA network
usually looks like the Star network shown above.

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RCF6001 Satellite Terminal Installation

Section 2 - Installation

2.0 Installation Requirements

The DMD2401 LB/ST Modem is designed to be installed within any standard 19-inch wide equipment
cabinet or rack, and requires 2 rack units of mounting space (3.5 inches) vertically and 21-inches of
depth. Including cabling, a minimum of 23-inches of rack depth is required. The rear panel of the
DMD2401LB/ST is designed to have power enter from the left and IF cabling enter from the center when
viewed from the rear of the modem. Data and control cabling can enter from either side although they
are closer to the right. The unit can be placed on a table or suitable surface if required.

There are no user-serviceable parts or configuration settings located inside the DMD2401 LB/ST
chassis. There is a potential shock hazard internally at the power supply module. DO NOT open
the modem case.

⇒⇒ CAUTION: Before initially applying power to the modem, it is a good idea to disconnect the

transmit output from the operating satellite ground station equipment. This is especially true if the
current modem configuration settings are unknown, where incorrect setting could disrupt existing
communications traffic.

2.1 Unpacking

The DMD2401 LB/ST was carefully packaged to avoid damage and should arrive complete with the
following items for proper installation:

1. DMD2401 LB/ST Modem Unit.

2. Power Cord, 6-foot with applicable AC connector.

3. Installation and Operation Manual.

2.1.1 Removal and Assembly

If using a knife or cutting blade to open the carton, exercise caution to ensure that the blade does not
extend into the carton, but only cuts the tape holding the carton closed. Carefully unpack the unit and
ensure that all of the above items are in the carton. If the Prime AC power available at the installation
site requires a different power cord/AC connector, then arrangements to receive the proper device will
be necessary before proceeding with the installation.

The DMD2401 LB/ST unit is shipped fully-assembled and does not require removal of the covers for any
purpose in installation. Should the power cable AC connector be of the wrong type for the installation,
either the cable or the power connector end should be replaced. The power supply itself is designed for
universal application using from 100 to 240 Vac, 50-60 Hz, 1.0 A.

2.2 Mounting Considerations

When mounted in an equipment rack, adequate ventilation must be provided. The ambient temperature
in the rack should preferably be between 10° and 35° C, and held constant for best equipment operation.
The air available to the rack should be clean and relatively dry. Modem units should not be placed
immediately above a high heat or EMF generator to ensure the output signal integrity and proper receive
operation.

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Installation RCF6001 Satellite Terminal

Table 2-1. DMD2401 LB/ST Rear Panel Connectors

Connector ID Description Function

J1 SMA 50-Ohm Female Rx IF 950-1525 MHz
J2 SMA 50-Ohm Female Tx IF 950-1525 MHz
J3 9-pin D-Sub Female RS-232 Terminal Port
J4 9-pin D-Sub Female Remote Port Connector
J5 9-Pin D-Sub Male Alarm Connector
J6 BNC Female 10 MHz External Reference
J7 BNC Female
J8 BNC Female External Clock
J9 37-Pin D-Sub Female Sync. Data Interface,

Do not mount the DMD2401 LB/ST in an unprotected outdoor location where there is direct contact with
rain, snow, wind or sun. The modem is designed for indoor applications only. The only tools required for
rack mounting the DMD2401 LB/ST is a set of four rack mounting screws and an appropriate
screwdriver. Rack mounting brackets are an integral part of the cast front bezel of the unit and are not
removable.

Reference Monitor, 5 dBm ± 3

RS422/RS485/RS232/V.35

J1 and J2, Tx and Rx IF connectors have voltage on the ports. Exercise care when the DMD2401
LB/ST has power applied.

2.4 Modem Connections / Interface Connectors

All modem connections are made to the labeled connectors located on the rear of the unit. The
connector definitions and pinout tables are shown below, and are those on the modem unit. Any
connection interfacing to the modem must be the appropriate mating connector.

NOTE: Shielded cables with the shield terminated to conductive backshells are required in order to meet
EMC directives. Cables with insulation flammability ratings of 94 VO or better are required for Low
Voltage Directives.

2.4.1 DMD2401 LB/ST Connector Pinout Tables

The following tables contain the pinout information for the various Data/IF connectors located on the rear
panel of the DMD2401 LB/ST. See Figure 2-1 for the DMD2401 LB/ST Rear Panel.

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RCF6001 Satellite Terminal Installation

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Installation RCF6001 Satellite Terminal

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RCF6001 Satellite Terminal Installation

J3 – RS232 Terminal Port

Table 2-2.
J3 - RS232 Terminal Port - 9-Pin Female ‘D’

Pin No. Signal Description Direction

3 TxD Transmit Data Output
2 RxD Receive Data Input
5 Gnd Ground -----

J5 – Alarm Connection

The modem has two form-C dry contact alarm relays onboard and an alarm connector located on the
rear panel, the 9-pin male “D” sub connector J6.

The two relays are designated Modulator Alarm and Demodulator Alarm. Non-Alarm is defined as the
powered state of the relay. Thus, if there is a Modulator Alarm and/or Demodulator Alarm, the pins will
be connected as follows:

Alarm No Alarm
Modulator
Demodulator

Pins 2 and 3 Shorted Pins 1 and 2 Shorted

Pins 8 and 9 Shorted Pin 7 and 8 Shorted

The pin definitions for J5 are shown in Table 2-3 below. Note that the NC and NO (Normally Closed
and Normally Open) nomenclature applies to non-energized relays.

Table 2–3.

J5 - Alarm Connector – 9-Pin Male ‘D’ Sub Connector

J6 Pin Number Connection

1 Mod Alarm Relay A NO on Alarm
2 Mod Alarm Relay A Common
3 Mod Alarm Relay A NC on Alarm
4 ----­5 AGC Voltage Output
6 Gnd

TM082 - Rev. 1.0

7 Demod Alarm Relay B NO on Alarm
8 Demod Alarm Relay B Common
9 Demod Alarm Relay B NC on Alarm

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Installation RCF6001 Satellite Terminal

J4 - Remote

The RS-485 connection is for remote monitor and control of the modem.
Refer to Table 2-4 below for the pinouts.

Table 2-4.
J4- RS485 Remote Port - 9-Pin Female ‘D’

Pin No. Signal Description Direction

1 RS485 TxD-B Transmit Data B Output
2 TxC-A Transmit Clock A Output
3 TxC-B Transmit Clock B Output
4 RxC-A Receive Clock A Input
5 Common Signal Common
6 RS485 TxD-A Transmit Data A Output
7 RxC-B Receive Clock B Input
8 RS485 RxD-B Receive Data B Input
9 RS485 RxD-A Receive Data A Input

J9 – Data Interface

Table 2–5.

J9 - Sync Data RS422/RS485/RS232/V.35 - 37-Pin Female

Pin Number Signal Description Direction

4 SD-A Send Data A (-) Input

22 SD-B Send Data B (+) Input

5 ST-A Send Timing A (-) Output

23 ST-B Send Timing B (+) Output

6 RD-A Receive Data A (-) Output

24 RD-B Receive Data B (+) Output

7 RS-A Request to Send A (-) Input

25 RS-B Request to Send B (+) Input

8 RT-A Receive Timing A (-) Output

26 RT-B Receive Timing B (+) Output

9 CS-A Clear to Send A (-) Output

14 MF Mod Fault - Open

Output

Collector

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RCF6001 Satellite Terminal Installation

33 DF Demod Fault - Open

Collector

27 CS-B Clear to Send B (+) Output
11* DM-A Data Mode A (-) Output
29* DM-B Data Mode B (+) Output

13 RR-A Receiver Ready A (-) Output

31 RR-B Receiver Ready B (+) Output

3 BAL EXC-AExternal Clock A (-) Input

21 BAL EXC-BExternal Clock B (+) Input

16 RX-0-A Receive Octet A (-) Output

34 RX-0 B Receive Octet B (+) Output

17 TT-A Terminal Timing A (-) Input

35 TT-B Terminal Timing B (+) Input

1, 19, 20, 37 GND Signal Ground

Output

*NOTE: The DMD2401 Satellite Modem has the capability of constantly outputting the DM/DSR
signal. (DSR and DM are actually the same signal). The modem is always in the condition of
being able to pass data. DTR input to the modem is not necessary. The DM/DSR output of the
modem is located on pins 11 and 29 as shown above.

J6 – Ext. Ref. IN

This port is used for injecting an External Reference Frequency into the modem. The DMD2401
master oscillator is locked to this source. All internally generated frequencies within the modem
will attain the stability of the applied external reference. The external reference must meet the
following parameters:

Frequency: 256 KHz to 10 MHz in multiples of 8 KHz
Amplitude: 0.2 V p-p to 5 V p-p
Type: Sinewave or Squarewave

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RCF6001 Satellite Terminal Maintenance

Section 3 – RCF6001 Satellite Terminal Operation

3.0 Operating Procedures

Operation of the DMD2401 LB/ST consists of controlling the unit operating parameters and monitoring
status and responses via front panel or Terminal Mode control.

These methods may be used separately or together to monitor and control the DMD2401 LB/ST.

3.1 Front Panel Control

The front panel of the DMD2401 allows complete monitor and control of all modem parameters and
functions via a keypad, LCD display and status LEDs.

3.1.1 Front Panel Layout and Features

The front panel layout is shown in Figure 3–1, showing the location and labeling of the front panel. The
front panel is divided into three functional areas: the LCD display, the Keypad and the LED Indicators,
each described below.

3.1.2 Front Panel LCD Display

The front panel display is a 2 line by 16 character LCD display. The display is lighted and the brightness
can be set to increase when the front panel is currently in use. The LCD display automatically dims after
a period of inactivity. The display has three distinct areas showing current information. The upper left
shows the current area of use, either Mod, Demod, Modem or Test. The upper right shows the current
parameter being monitored, such as ‘Freq.’ (frequency) or ‘Bit Rate.’ The lower line shows the current
value of that parameter. The LCD display is a single entry window into the large matrix of parameters
that can be monitored and set from the front panel.

The backlight brightness can be set for two states: Active and Idle. The active state is entered whenever
a key on the front panel is depressed, while the idle state occurs after approximately 45 seconds of
inactivity. Each state may be set to ‘Off’, 1/3 brightness, 2/3 brightness and full brightness. The default
setting is full in the active state and 1/3 in the idle state. To change the settings for either state, go to the
‘Modem LCD Active’ or ‘Modem LCD Idle’ brightness parameter and adjust to the desired values.

3.1.3 Front Panel Keypad

The front panel keypad consists of two areas: a 10-key numeric entry with 2 additional keys for the
‘Enter’ and ‘Clear’ function. The second area is a set of ‘Arrow’ or ‘Cursor’ keys (↑↑), (↓↓), (→→), (←←), used
to navigate the parameter currently being monitored or controlled. During entry, the cursor keys allow
moving a cursor to individual digits of a numerical entry or scrolling through the available options of a
selection entry.

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Maintenance RCF6001 Satellite Terminal

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RCF6001 Satellite Terminal Maintenance

Table 3-1. Front Panel Controls and Indicators

Figure 3-1

Description Function

Item Number

1 LCD Front Panel Display Displays Modem Operating parameters and

Configuration data

2 Cursor Control Arrows Controls the up, down, right and left motion of the

cursor in the LCD Display window

3 Numeric Keypad Allows entry of numeric data and Clear and Enter

function keys
4 Modulator LEDs See Below for Itemized descriptions of these LEDs
5 Demodulator LEDs See Below for Itemized descriptions of these LEDs
6 Power LED Indicates Modem is powered-up
7 Fault LED A fault has occurred; Common Fault
8 Event LED See Paragraph 3.5 for details
9 Remote LED Remote Control Operation in progress

3.1.4 Front Panel LED Indicators

There are 12 LEDs on the modem front panel to indicate status of the modem’s operation. They are
separated into three columns representing (from left to right) the Modulator status, the Demodulator
status and the Modem (Unit) status. The LED colors maintain a consistent meaning. Green signifies that
the indication is appropriate for normal operation, Yellow means that there is a condition not proper for
normal operation. Red indicates a fault condition that will result in lost communications.

Modem LED Indicators

1. Power: Green – Indicates the modem unit is currently under power.

2. Fault: Red – If summary fault condition exists from either Alarm A or B.

3. Stored Event: Yellow – Indicates that a condition or event has occurred that the
modem has stored in memory. The events may be viewed from the
Front Panel or in the Terminal mode.

4. Remote: Green – Indicates that the unit is set to respond to the remote control

input.

Modulator LED Indicators

1. Transmit On: Green – Indicates that the transmit output is currently active.

2. Major Alarm: Red – Indicates that the transmit direction has failed, losing traffic.

3. Minor Alarm: Yellow – Indicates a transmit warning condition exists.

4. Test Mode: Yellow – Indicates the modulator is involved in a current test mode

activity.

Demodulator LED Indicators

1. Signal Lock: Green – Indicates receiver lock to an incoming CXR and data

including FEC sync.

2. Major Alarm: Red – Indicates that the receive direction has failed, losing traffic.

3. Minor Alarm: Yellow – Indicates a receive warning condition exists, either an

incoming carrier with a low input level or a low Eb/No (programmable
threshold).

4. Test Mode: Yellow – Indicates the receiver is involved in a current test mode

activity.

3.1.4.1 Guide to Front Panel Monitor and Control

The front panel can be used to perform complete monitor and control of the modem setup and operating
parameters. The operation of the front panel becomes very easy after a short period of use in which the
user becomes familiar with the basic concepts and operations.

3.2 Modem Terminal Mode Control

The modem can be interactively monitored and controlled in the Terminal mode, with a full screen
presentation of current settings and status. Programming is accomplished by selecting the item to be

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Maintenance RCF6001 Satellite Terminal

modified and pressing the terminal key of the option number. For example, to change the transmit data
rate, enter ‘33’ at the terminal. The modem will respond by presenting the options available and
requesting input. Two types of input may be requested. If the input is multiple choice, the desired choice
is selected by pressing the ‘Space’ key. When the desired option is displayed, press the ‘Enter’ key to
select that option. The other possible input type requires a numerical input (such as entering a frequency
or data rate). This type of input is followed by pressing the ‘Enter’ or carriage return key. An input can be

. Invalid input keys cause an error message to be displayed

on the terminal.
The Terminal Control Mode supports serial baud rates of 2400, 9600 and 19200. The connection must

be set for 8 data bits, 1 stop bit and no parity (8,N,1). Three terminal emulations are supported: VT100,
WYSE 50, and ADDS. The emulation type can be changed either from the front panel or by pressing ‘$’
(dollar sign) on the terminal keyboard. The terminal menus are shown in Appendix C at the end of this
manual.

3.3 Modem Remote Port Control

The modem can be controlled by an external Monitor & Control (M&C) system through Remote Port
mode (also referred to as Computer Mode). Communication between the DMD2401 and the external
system control computer is via a binary protocol which is described in detail in Appendix B at the end of
this manual. The remote port provides RS485 capability and thus can be used with a multi-drop control
bus allowing a single external M&C computer to control several DMD2401 modems.

3.4 Parameter Setup

To set any parameter, the four arrow keys to the right of the LCD display are used to select the
parameter to be set, followed by pressing the ‘Enter’ key to indicate that a new entry is desired, then
setting the parameter via the numeric keypad and finalizing the data entry using the ‘Enter’ key. The
current input can be canceled by depressing the ‘Clear’ key at any time before pressing ‘Enter’. When
the entry involves selection of 1 of several choices, this is accomplished by either: pressing an option
number selection (0 to max. where max. may be 1 to 4) then pressing the ‘Enter’ key, or, using the up
and down arrow keys to scroll though the available options, pressing ‘Enter’ when the desired option is
displayed. When scrolling though the available options, the current setting is denoted by an arrow in the
left column position.

Following a valid input, the modem will place the new setting into the nonvolatile EEPROM making it
available immediately and also automatically the next time the unit is powered-up.

3.5 Modem Checkout

The following descriptions assume that the modem is installed in a suitable location with prime AC power
applied and supporting equipment available.

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