Hal Communications DXP38 User manual

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HF RADIO DSP MODEM
OPERATOR'S
MANUAL
Copyright 1998 ©by HAL Communications Corp., Urbana, Illinois. Printed in the United States of America. Contents of
this publication may not be reproduced in any form without the written permission ofthe copyright owner.
HAL990308
870-13800
March
8, 1999 Printing
DXP38 MANUAL
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Chapter 1.
Chapter 2
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Chapter 3
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HAL990308
Table Of Contents
Introduction
1.1 The DXP38 Manual................................................................... 1-1
1.2 DXP38 Software........................................................................ 1-1
1.2.1 Minimum Requirements ............................................... 1-2
1.2.2 Software and Documentation Up-Date........................ 1-2
Installation and Set-Up
2.1
2.2
2.3
2.4
2.5
Unpacking
and lnspection......................................................... 2-1
DXP38 Rear Panel Connections...............................................2-2
2.2.1 Audio lnput...................................................................2-2
2.2.2 Audio Output ................................................................2-4
2.2.3 PTT Output...................................................................2-4
2.2.4
FSK Output ..................................................................2-5
2.2.5 SEL-CAL Output ..........................................................2-6
2.2.6 RS-232 Connections....................................................2-6
2.2.7 Ground Connection ......................................................2-7
2.2.8
DC Power Connection .................................................2-7
Initial Transmitter
and Receiver Adjustment .............................2-7
Front
Panel Status and Tuning Indicators ................................2-9
2.4.1 Status Indicators ..........................................................2-9
2.4.2 Tuning Indicator- MIS Mode........................................2-9
2.4.3 Tuning Indicator- M Mode...........................................2-9
2.4.4 Print Squelch lndicator...............................................
2-11
Special Considerations When Operating CLOVER ................ 2-11
2.5.1 Transmitter and Receiver Requirements ................... 2-11
2.5.2 Receiver Tuning of CLOVER-II Signals.....................2-12
2.5.3 Transmit Modulation ..................................................2-12
2.5.4 Receiver
AGC and Noise Limiter...............................2-12
2.5.5 Receiver Filters ..........................................................2-12
2.5.6 Receiver Audio Level .................................................2-13
2.5.7 Adaptive Control
and Radios .....................................2-13
Operation Under Windows
3.1
3.2
3.3
3.4
3.5
3.6
Installing DXPWin Software...................................................... 3-1
3.1.1 The DXPWin Setup Window........................................ 3-2
3.1.2 Changing DXPWin Directory........................................ 3-2
3.1.3 Beginning Installation................................................... 3-2
Manual Conventions .................................................................3-2
Running DXPWin ......................................................................3-4
MY CALL Setup .........................................................................3-4
Main Screen ..............................................................................3-4
Menu Line .................................................................................3-5
3.6.1 File Menu .....................................................................3-5
3.6.2 Edit Menu .....................................................................3-5
3.6.3 View Menu ...................................................................3-6
3.6.4 Options Menu...............................................................3-6
3.6.5 Special Menu ...............................................................3-7
DXP38 MANUAL
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Chapter 4
HAL990308
3.7 Toolbar .....................................................................................3-7
3.8 Receive (RX) Buffer..................................................................3-9
3.9 Echo on Transmit (TX) Buffer...................................................3-9
3.1 0 Transmit Buffer..........................................................................3-9
3.11 Tuning Indicators.......................................................................3-9
3.12 Status Bar ...............................................................................3-10
3.13 General Configuration.............................................................
3-1 0
3.14 Operating RTTY......................................................................
3-11
3.14.1 RTTY Codes .............................................................. 3-11
3.14.2 Starting RTTY ............................................................ 3-11
3.14.3 RTTY Data Rates....................................................... 3-11
3.14.4 Control Options .......................................................... 3-11
3.14.5 Configuration Options ................................................3-12
3.14.6 Special
RTTY Transmit Keys .....................................3-13
3.15 Operating
CLOVER-11 .............................................................3-14
3.15.1 Tuning a CLOVER Signal ..........................................3-14
3.15.2 RX/TX Status Table ...................................................3-15
3.15.3 Adaptive
ARQ Mode ..................................................3-15
3.15.4
FEC Mode ..................................................................3-16
3.15.5 Listen Mode................................................................3-17
3.15.6 TestMode..................................................................3-17
3.15. 7 CLOVER-II Configuration Menu Parameters.............3-17
3.16 Operating AMTOR ..................................................................3-18
3.16.1 Control Options ..........................................................3-18
3.16.2
ARQ Mode .................................................................3-18
3.16.3
FEC Mode..................................................................3-20
3.16.4 Listen mode................................................................3-20
3.17 Operating P-Mode...................................................................3-20
3.17.1 ARQ Mode ................................................................. 3-21
3.17.2 FEC Mode (UNPROTO) ...........................................3-22
3.17.3 LISTEN Mode.............................................................3-23
Operation Under
DOS
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
Installing DXP38 Software ........................................................
4-1
Manual Conventions .................................................................4-2
MYCALL Setup .........................................................................4-3
Main Screen ..............................................................................4-3
4.3.1 Tuning Indicators .........................................................4-4
4.3.2 Receive (RX) Buffer.....................................................4-4
4.3.3 Status Line ...................................................................4-4
4.3.4 Command Line.............................................................4-4
4.3.5 Transmit (TX) Buffer ....................................................4-4
4.3.6 Information Line ...........................................................4-4
Configuration Screens ............................................................
4-11
Hot-Keys .................................................................................4-13
4.6.1 Function Hot-Keys .....................................................4-13
4.6.2 Alt-letter Hot-Keys......................................................4-13
File 0 perations........................................................................4-16
4.7.1 Load TX Buffer...........................................................4-16
4.7.2 Save
To Disk..............................................................4-16
4.7.3 Stop
Send I Save .......................................................4-17
4.7.4
Send From Disk .........................................................4-18
4.7.5 Directory.....................................................................4-18
4.7.6
Load DXP38...............................................................4-18
TX Buffer Editor......................................................................A-18
DXP38 MANUAL

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Chapter 5
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Chapter 6
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4.9 Operating RTTY......................................................................4-19
4.9.1 RTTY Codes ..............................................................4-19
4.9.2 Starting RTTY ............................................................4-19
4.9.3 RTTY Data Rates......................................................
A-20
4.9.4 Control Menu Options ................................................4-20
4.9.5 Configuration Menu Options ......................................4-22
4.9.6 Print Squelch..............................................................4-23
4.9.7 Special RTTY Transmit Keys.....................................4-23
4.10 Operating CLOVER-II .............................................................4-23
4.1 0.1 Tuning A CLOVER Signal..........................................4-24
4.10.2 RX!TX Status Table ...................................................4-25
4.10.3 Adaptive ARQ Mode ..................................................4-26
4.1 0.4 FEC Mode..................................................................4-27
4.10.5 LISTEN Mode.............................................................4-28
4.10.6 Test Mode ..................................................................4-28
4.1 0. 7 CLOVER-II Configuration Menu Parameters.............4-29
4.11 Operating AMTOR ..................................................................4-29
4.11.1 ARQ Mode .................................................................4-29
4.11.2 FEC Mode..................................................................4-33
4.11.3 LISTEN Mode.............................................................4-33
4.12 Operating P-Mode...................................................................4-33
4.11.1 ARQ Mode .................................................................4-33
4.11.2 FEC Mode
(UN PROTO) ............................................4-35
4.12.3 LISTEN Mode.............................................................4-36
In Case Of Difficulty
5.1
5.2
5.3
5.4
5.5
5.6
5.7
User Adjustments and Alignment..............................................
5-1
DXP Hardware Problems.......................................................... 5-1
Software Problems....................................................................5-2
Operational Problems ...............................................................5-2
User Service..............................................................................5-3
User Information........................................................................5-3
Returning Equipment to Factory for Repair ..............................5-4
Specifications
Warranty
DXP38 MANUAL
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HAL990308
Table 2.1
Table 2.2
Table 2.3
Table 2.4
Table 2.5
Table 2.6
Table 2.7
Table 3.1
Table 3.2
Table 3.3
Table 3.4
Table 4.1
Table 4.2
Table 4.3
Table 4.4
Table 4.5
Table 4.6
Table 4.7
Table 5.1
Figure 2.1
Figure 2.2
Figure 2.3
Figure 2.4
Figure 2.5
Figure
4.1
Figure 4.2
Figure 4.3
Figure 4.4
Figure 4.5
Figure 4.6
Figure 4.7
Figure 4.8
Figure 4.9
Figure 4.10
Tables
DXP38 1/0 Connections...............................................2-2
AF OUTVoltage Ranges .............................................2-4
DXP38 FSK Output Options ........................................2-5
FSK for Typical Amateur Transceivers ........................2-5
RS-232 Data 1/0 Connections .....................................2-7
DXP38 Status lndicators..............................................2-9
CLOVER-II HF Radio Requirements .........................2-11
RTTY Data Rates and Speeds .................................. 3-11
RTTY and AMTOR Default Settings..........................3-12
Baudot Code Differences...........................................3-13
Special RTTY Transmit Keys.....................................3-14
Function HOT-KEY Assignments...............................4-14
Alt-letter HOT-KEY Assignments...............................4-15
Transmit Buffer Edit Keys ..........................................4-19
RTTY Data Rates and Speeds ..................................4-20
RTTY Control Options................................................4-20
Baudot Code Differences...........................................4-22
Special RTTY Transmit Keys.....................................4-23
User-Set Options..........................................................
5-1
Figures
DXP38 Rear Panel Connectors...................................2-2
Radio System Connections..........................................2-3
Jumper J3 and J6.........................................................2-4
Typical M/S Mode Tuning Display .............................2-10
Typical M Mode Tuning Display.................................2-10
DXP38.EXE Main Screen ............................................4-3
Main Menu Tree for CLOVER (left side)......................4-5
Main Menu Tree for ALL Codes (right side).................4-6
Main Menu Tree for Baudot RTTY (left side)...............4-7
Main Menu Tree for ASCII RTTY (left side).................4-8
Main Menu Tree for AMTOR (left side)........................4-9
Main Menu Tree for P-Mode (left side) ......................4-10
Configuration Menu- Page 1 (CLOVER &System) ..4-12
Configuration
Menu- Page 2 (HERE IS &HISCALL)4-12
Configuration
Menu- Page 3 (FSK Modes)...............4-13
DXP38 MANUAL

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FCC Statement
FCC RADIO FREQUENCY EMISSIONS STATEMENT
(Reference: CFR 47, Part 15)
U.S. Federal Communications Commission (FCC) Rules and Regulations, CFR47, Part
15,
require inclusion of the following text in this manual.
INFORMATION TO THE USER (Section 15.105)
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference
in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and,
if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there
is no
guarantee that the interference will not occur
in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
--Reorient or relocate the receiving antenna
--Increase the separation between the equipment and the receiver.
--Connect the equipment into
an outlet on a circuit different from that to which the receiver is
connected.
--Consult the dealer or experienced Radio/TV technician for help.
INFORMATION TO USER (Section 15.21)
The user is cautioned that any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.
P-Mode
The word "P-Mode" is the HAL designation for a communications protocol that may also be known as "Pactor", a
registered trademark of the Spezielle Communications Systeme GmbH (SCS) firm in Hanau, Germany. HAL affirms that,
to the best of its knowledge, "P-Mode" is compatible and interoperable with the protocol SCS calls "Pactor'' and with the
link establishment mode of the protocol SCS calls "Pactor-11" .
HAL990308 DXP38 MANUAL

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Chapter 1
Introduction
1.1 The DXP38 Manual
The DXP38 is the latest
in the evolution of HAL DSP modem products that started with the PCI-4000.
Operation, software, and control are very similar to that
of the PCI-4000, P38, and DSP-41 00 modems.
Many
of the same terminal programs used with these modems may also be used with the DXP38 with little
or no changes. If you are already familiar with use of HAL DSP modems, please have a look at the
instructions and diagrams
of Chapter 2 and then jump right in.
Unlike previous HAL DSP modems, the DXP38 includes a hardware front panel tuning indicator that works
with all terminal programs. The crossed-bar display is used for all data modes -RTTY, AMTOR, P-Mode,
and CLOVER. The display may be switched between the normal MIS "+" tuning display and a zero-center
tuning error scale. Use of the display for each mode is discussed in Chapter 2.
The DXP38 also includes DXPWin, a new HAL terminal program that runs under W95, W98, or NT4.0
Windows™ operating systems. The display format of DXPWin is very similar to the format of our DOS-
based P38.EXE, PCC.EXE, and DSP41.EXE programs. You may not need much instruction to use this
software, particularly ifyou are familiar with windows programs and ifyou have previously used the HAL
DOS programs. However, a thorough reading
of Chapter 3 is in order after "the new wears off'.
Our DOS-based terminal program, DXP38.EXE, is also included for all that wish to continue using PC-
DOS. This is the popular and proven program HAL has included with all of our DSP modem products
since 1993. Chapter 4 includes all of the operating details for those who may not have used this software
or those of us who have forgotten a detail or two.
If you have problems, read Chapter 5, In Case of Difficulty. Sometimes, fixing a problem can be as simple
as adding shielded wire; sometimes you need to send the modem to us for "heart surgery" or maybe it's
time for an "oil change and a lube job"!
Chapter 6 lists all
of the fine-print specifications for those who like impressive numbers.
Be sure to read the Warranty. It is the standard HAL Warranty we have used for years. HAL stands behind
its products. If you have a problem -LET US KNOW!
1.2 DXP38 Software
Your DXP38 package includes four (4) 3.5" diskettes. Three of these diskettes contain DXPWin, the
windows-based terminal program. The remaining diskette contains DXP38.EXE, the DOS-based terminal
program, and firmware that is used by the on-board microprocessors. Loading of DXPWin is discussed in
Chapter 3 and loading of DXP38.EXE in Chapter 4. The firmware files on disk 4 will not be required unless
the contents of the flash memory become damaged. Consult Chapter 5 to determine when reloading is
necessary and how to reload the firmware.
HAL990308 DXP38 Manual

CHAPTER 1 INTRODUCTION 1-2
1.2.1 Minimum Requirements
The DXP38 modem and its DXPWin or DXP38.EXE Software may be used with virtually any RS-232-
equiped, IBM-compatible personal computer (PC). The serial port requirements are:
Connector (DXP38): DE9P (male pins)
Data Format:
Data Rate: RS-232 levels with RTS/CTS hardware flow control
9600 baud
Data Format: No Parity, 8 bit data, 1 Stop bit (N-8-1)
The requirement on the PC itself is dependent upon whether the DOS or windows version of terminal
software is used. Relatively old, slow, and inexpensive PC's may be used with DOS software; use of
Windows requires a modern, fast, and relatively expensive PC. The minimum recommendations are:
DXPWin (use with Windows-95™, Windows-98™, or Windows-NT4.0™):
PC-Pentium, 100 MHz
32MB RAM
1 - 3.5" floppy disk drive
1 - hard disk drive (20MB free space minimum)
VGA video card and monitor minimum
DXP38.EXE (use with PC-DOS):
PC-AT or higherwith MS-DOS or PC-DOS
IBM-compatible ROM BIOS
640K RAM minimum
1 - 3.5" floppy disk drive
1 -hard disk drive (1MB free space minimum)
Third-Party Programs: If you will be using "Third-Party" terminal programs with the DXP38 (software not
written by HAL), carefully read the documentation provided with the program and follow its instructions.
Note that the DXP38 uses the same command set as the DSP-4100 modem. If "DXP38" is not listed as a
modem option, try using "DSP4100" instructions. HAL Communications Corp. continues to work closely
with a number of software authors and firms to provide additional user software. See our web page for
links and a current list of "3rd Party" authors for CLOVER and DXP38 software.
1.2.2 Software and Documentation Up-Date
New versions of each program are available to all DXP38 owners as they are released by HAL
Communications. Some software changes may also require changes to the documentation (manuals).
Current copies of DXP38 software and documentation updates may be downloaded from our Internet web
page at www.halcomm.com.
If you have problems or need additional information, please call:
Customer Service Manager
Voice:
FAX:
HAL990308
[phone] (SAM- 5PM CST/CDT; Monday- Friday)
[phone] (24 hours/day)
DXP38 MANUAL

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Chapter 2
Installation and Set-up
This chapter discusses how to connect the DXP38 modem to the radio system and to a PC terminal.
Operation
of the front panel tuning and status indications is discussed in section 2.4. Installation and use
of HAL terminal software is presented in Chapter 3 (DXPWin for use with W95, W98, or NT4.0) or
Chapter 4 (DXP38.EXE for operation under MS-DOS).
2.1 Unpacking and Inspection
The DXP38 system includes the following materials:
1
-900-13800 Complete DXP38 product
This includes:
1
-910-13800 DXP38 HF Modem
1
-870-13800 DXP38 MANUAL
1 - 865-13810 DXP38-Disk
#1 (DXPWin #1, Rev X)
1
-865-13820 DXP38-Disk #2 (DXPWin #2, Rev X)
1 - 865-13830 DXP38-Disk #3 (DXPWin #3, Rev X)
1
-865-13840 DXP38-Disk #4 (DXP38.EXE, DXP38.LOD &DXP38.S28, Rev x)
1
-310-16032 DC Power Connector
When opening the DXP38 shipping carton, carefully inspect it for any evidence
of shipping damage. Any
damage should be immediately reported to your shipping carrier. Be sure to save any damaged packing
materials. Note that a damage claim must be filed by you with the shipping carrier -
NOT HAL
Communications. HAL will be glad to assist in such cases, but only the shipping carrier can pay claims.
Check to be sure that all
of the materials listed above are contained in your DXP38 package. If you find
any materials missing, please contact your dealer or HAL Communications as soon as possible.
HAL990308 DXP38 MANUAL

CHAPTER 2 INSTALLATION 2-2
2.2 DXP38 Rear Panel Connections
The rear panel
of the DXP38 modem is shown in Figure 2.1 and the limits for each 1/0 signal are shown
in Table 2.1. These requirements are compatible with all modern amateur transmitters and receivers. DO
NOT EXCEED THESE LIMITATIONS.
GND
©
DC
HAL CoMMUnico. tions Corp.
DXP38 DSP ModeM
Serio.l
No. -------
MQde In USA
AF AF
PTT
OUT TX IN RS-232
LVL
IN SELCAL FSK
0 @ @ @
@®@ o\i l]o
Figure 2.1 DXP38 Rear Panel Connections
Table 2.1
DXP38 1/0 Connections
CONN FUNCTION 1/0 LIMITS
AFIN Audio from RX Input 5V p-p
AFOUT Audio to TX Output -30d8m (25 mV)
PIT
Push-to-Talk Output Output +50V@ 100 rna
FSK FSK Output Output
+50V@ 100 rna
SELCAL SEL-CAL Output Output
+50V@ 100 rna
DC IN DC Power Input Input
+9- +18V@ 0.6A
GND RF Ground Ground
RS-232 Data
110 +/-15 VDC
Typical connections
of the DXP38 to radio station equipment are shown in Figure 2.2.
2.2.1 Audio Input
The DXP38 Audio Input (AF IN) is unbalanced. The Input impedance is 10,000 ohms, ±10%. This input
can be directly connected to a wide variety
of receiver audio output terminals including low-impedance
speaker
(4- 16 ohms), line (600 ohms), headphone (2K ohms) or "recorder output" (10,000 ohms). A
matched terminating resistor is not required. The maximum audio input voltage to the DXP38 should not
exceed 5 volts peak-to-peak (1.7V rms; +7 dBm). The DXPWin and DXP38.EXE terminal programs
include tuning indicator bars which may be used to adjust the receiver output volume.
HAL981211 DXP38 MANUAL