Antex electronic SX-34, SX-36, SX-5e User Manual
SX-5e SX-6
SX-34 SX-36
Digital Audio Adapter
User's Manual
September 17, 1999
Rev. E
ANTEX ELECTRONICS CORPORATION
1125 W. 190
GARDENA, CALIFORNIA 90248
info@antex.com
www.antex.com
Toll Free: 1-800-338-4231
Fax: 310-532-8509
9000-2351-7006
th
STREET
Declaration of Conformity
Standards to which Conformity is Declared:
EN55022 (Class A) 1994, EN 50082-1 1992
This equipment has been verified to comply with the limits for
a class A computing device, pursuant to FCC Rules. In order
to maintain compliance with FCC regulations, shielded cables
must be used with this equipment. Operation with nonapproved equipment or unshielded cables is likely to result in
interference to radio and TV reception. The user is cautioned
that changes and modifications made to the equipment without
the approval of the manufacturer could void the user's authority to operate this equipment.
TABLE OF CONTENTS
INTRODUCTION......................................................................1
CARD INSTALLATION.............................................................1
JUMPER SETTINGS & CONNECTIONS......................2
I/O ADDRESSES AND INTERRUPTS.......................... 3
MAKING CONNECTIONS TO THE CARD...............................3
SX-35/36 CONNECTOR DESCRIPTION .................................5
SX-34 CONNECTOR DESCRIPTION......................................8
SX-6 CONNECTOR DESCRIPTION........................................11
SX-5e CONNECTOR DESCRIPTION......................................13
BALANCED AND UNBALANCED SIGNALS............................13
IMPEDANCE AND SIGNAL LEVELS .......................................14
PLAYBACK AND RECORD DEVICES.....................................15
COMPRESSION, DATA RATES, AND NETWORKS ...............16
ISO/MPEG-1 BITRATES..........................................................17
DRIVER INSTALLATION..........................................................19
WINDOW S 95 ..............................................................19
Setup Tips (Upgrade Driver, WIN 95) ...........................19
Setup Tips (Upgrade Driver, WIN 98) ...........................20
WINDOW S NT ..............................................................21
ANTEX APPLICATION SOFTWARE INSTALLATION .............22
USING WINDOWS DEMONSTRATION SOFTWARE .............23
INSTALLING AND USING MULTIPLE CARDS IN A SYSTEM.27
DUAL DEVICE OPERATION....................................................27
MIXER AND BLOCK DIAGRAMS.............................................28
SX-36 MIXER AND BLOCK DIAGRAM.........................29
SX-34 MIXER AND BLOCK DIAGRAM.........................34
SX-6 MIXER AND BLOCK DIAGRAM...........................36
SX-5e MIXER AND BLOCK DIAGRAM.........................39
ANTEX METER........................................................................42
TROUBLESHOOTING .............................................................46
TECHNICAL/ORDERING INFORMATION:..............................49
APPENDIX...............................................................................50
Connectors for Male Headers.......................................50
Terms ...........................................................................50
Specifications................................................................52
About Digital Audio .......................................................54
FIGURES
Figure 1. SX-5e,6,34,35 & SX-36 Jumper Settings...................2
Figure 2. SX-35/36 Connections..............................................5
Figure 3. SX-34 Connections...................................................8
Figure 4. SX-6 Connections.....................................................11
Figure 5. Antex Demo Program...............................................23
Figure 6. MPEG Bitrates..........................................................24
Figure 7. File Open Dialog Box................................................25
Figure 8. Auto Repeat .............................................................26
Figure 9. SX-36 Mixer..............................................................32
Figure 10. SX-36 Block Diagram.............................................33
Figure 11. SX-34 Mixer............................................................34
Figure 12. SX-34 Block Diagram.............................................35
Figure 13. SX-6 Mixer..............................................................37
Figure 14. SX-6 Block Diagram...............................................38
Figure 15. SX-5e Mixer............................................................39
Figure 16. SX-5e Block Diagram.............................................41
Figure 18. Antex Meter pull-down menu..................................43
Figure 19. Antex Meter options................................................44
Figure 20. Analog-to-Digital .....................................................56
Figure 21. Digital-to-Analog.....................................................57
INTRODUCTION
The Antex SX-5e, SX-6, SX-34 and SX-36 f amily of cards are ISA
bus audio “add-in” cards for the PC. They all incorporate DSP’s
(Digital Signal Processors), which allow the cards to do a variety
of audio formats. (MPEG, PCM16, MSADPCM, etc.) All cards are
dual device, which means they can operate on 2 hard drive files at
the same time. These cards operate at several fixed standard
sample rates: 8, 11.025, 16, 22.05, 32, 44.1, and 48 KHz. The
SX-5e and SX-6 are playback only cards, and the SX-34 and SX 36 have playback and record capability. The SX-5e and SX-34
have unbalanced analog I/O and the SX-6 and SX-36 have balanced analog I/O. Up to 4 cards may be installed into one computer.
Software is provided for Win95/98, and WinNT. Software includes the “driver”, the Antex Demo application, Antex Mixer application, and Antex VU Meter application. Contact Antex Technical Support or visit the Antex website (www.an tex.c om), f or in formation about DOS or Windows 3.11 drivers, or the Sof tware Developer’s Kit (SDK).
CARD INSTALLATION
Make sure the main power to your computer is OFF. You will
need a 16 bit/AT slot. If you are unfamiliar with the internal design
of your computer see its "Guide to O perations" m anual for step by
step installation procedures. To avoid damaging the board or
your computer with static electricity:
1. Touch the metal of your computer chassis first to discharge
the static electricity from yourself bef ore opening the antistatic
bag the Antex Card is packaged in.
2. Move around as little as possible. Don’t shuffle your feet on
carpet or move around in your chair.
3. Handle the card by the bracket and the edges. Try not to
touch the gold fingers or any of the parts on the board.
1
Set the board number with jumpers as shown below. If only one
board is being used, leave the jumpers of f (sets to board number
one). When using more t han one card in a comput er, each board
must be given a different number by setting the jumpers differently on each card. Any model Antex Card may be used with any
other model Antex Card. All model Antex Cards use the same
jumper arrangement to set the board number.
JUMPER SETTINGS & CONNECTIONS
J1
SX-5e/6/34
35/36
Top View
214
3
Board 1 Board 2 Board 3 Board 4
Covered by jumper
214
3
214
3
214
3
Figure 1. SX-5e,6,34,35 & SX-36 Jumper Settings
The jumpers are oriented vertically so that they may be easily
changed without having to remove the card from the computer
slot if they should need to be changed later. These jumpers only
set the board number, allowing for more than one board in a computer. They do not set interrupts.
2
I/O ADDRESSES AND INTERRUPTS
SX-5e, 6, 34, 35 & 36 I/O addresses and interrupts are software
selectable. The valid I/O addresses are:
180h, 220h, 280h, 300h, 320h and 380h
The valid interrupts are:
2, 3, 4, 5, 10, 11 and 12
Note that interrupts 3 and 4 are normally used by the computer’s
COM ports and will not be available. The interrupt and I/O addresses are selected at the time of sof tware installation or automatically by Windows 95/98.
________________________________________________
MAKING CONNECTIONS TO THE CARD
The more commonly used signals are connected to the car d from
the rear of the computer using connectors on the card’s brack et.
Other connectors for auxiliary functions are single or dual row
male headers on the card itself. The pins on these connectors
are numbered as follows:
Dual row headers oriented vertically on the card start with pin 1 in
the upper left corner. Odd number pins continue down the left
column of pins. Even numbers go down the right column of pins,
with pin 2 being at the top.
Single row headers oriented horizontally on the card have pin 1 on
the left.
See the appendix for information on the mat ing connectors f or t he
single and dual row headers. Cables which connect to the DB9
connector on the SX-6, SX-35, and SX-36 are available from Antex. The following wiring diagrams ar e pr ovided to m ake your own
cables. Antex recommends using shielded twisted pair cable f or
3
balanced connections and shielded coax cable for unbalanced
connections. See the section “Balanced and Unbalanced Signals”.
4
SX-35/36 CONNECTOR DESCRIPTION
R
s
A
JP1
JP4
JP3
SX-35/36
Pin Assignment
1Ground
2 Right In 3Left In4Right Out 5Left Out 6 Right In +
7 Left In +
8Right Out +
9Left Out +
Balanced In - XLR male shell, female pin
GND
- 2
+ 3
- 2
12345
+ 3
6789
1
+ 3
1
Balanced Out - XLR female shell, male pins
SX-35/36 Balanced I/O to XL
+ 3
Balanced Analog I /O Connector
DB-9
Female
1
Left
1
Right
- 2
Left
- 2
Right
JP7
JP8
BALANCED
IN/OUT
JP9
12345
6789
Unbalanced In - Female RCA
12345
6789
Unbalanced Out - Female RCA
SX-35/36 Unbalanced I/O to RC
Left
Right
Left
Right
Figure 2. SX-35/36 Connections
5
LINE I/0 (JP8)
Pin 1 Right Line Input +
Pin 3 Right Line Input Pin 5 Left Line Input +
Pin 7 Left Line Input Pin 9 Right Line Output +
Pin 11 Right Line Output Pin 13 Left Line Output +
Pin 15 Left Line Output -
Pin 2,4,6,8,10,12,14,16 Ground
This connector duplicates the function of the DB9 connector. It
might be used with a custom “Industrial Rack Mount PC” with a
special cable harness that brought the connections out to the front
panel.
6
AUX IN (JP9)
Pin 1 Right Aux Input +
Pin 3 Right Aux Input Pin 5 Left Aux Input +
Pin 7 Left Aux Input Pin 9,11,13,15 No connection
Pin 2,4,6,8,10,12,14,16 Ground
The Auxiliary inputs are balanced inputs, the same as the Line In
and can be used in the same way; as a record source or analog
feed-through to t he Line O ut.
MIC (JP7)
Pin 1 Microphone input (2.5
VDC phantom power
Pin 2 Ground
The microphone input will supply phantom power required by an
Electret type condenser microphone. A dynamic microphone can
also be used, although the phantom power will degrade the dynamic range of the microphone som ewhat. This can be avoided
by using an adapter with a DC blocking capacitor when using a
dynamic microphone.
7
SX-34 CONNECTOR DESCRIPTION
A
g
JP1
JP5
SX-34
JP6
JP7 JP4
LINE IN
MIC
UX
LINE OUT
Figure 3. SX-34 Connections
1. SPx Header - JP1
JP1 is a 40-pin, dual-row, 2mm spaced header the provides
connections for an SPx module.
2. Output Header - JP5
JP5 is a 5-pin, 0.100" spaced header that provides connections for the left and r ight output signals. These are t he same
signals provided by the OUT jack on the bracket. The output
signals are switched to JP5 only when the is there no plug in
the OUT jack.
1
5
Ground
Left Out
Ground
Ri
ht Out
Ground
8
3. AUX Header - JP6
p
g
p
JP6 is a 5-pin, 0.100" spaced header that provides connections for left and right auxiliary input signals. These are the
same connections provided by the AUX jack on the bracket.
Signals present at JP6 are switched in only when there is no
plug in the AUX jack.
1
5
Ground
Left In
Ground
Ri
Ground
ut
ht Input
4. Microphone Header - JP7
JP7 is a 2-pin, 0.100" spaced header that provides a microphone
input connection. This is the same connection provided by the
MIC jack on the bracket. A signal present at JP7 is switched in
only when there is no plug in the MIC jack. The microphone input
will supply 2.5 VDC phantom power required by an Electret type
condenser microphone. A dynamic microphone can also be used,
although the phantom power will degrade the dynamic range of
the microphone somewhat. This can be avoided by using an
adapter with a DC blocking capacitor when using a dynamic microphone.
1
2
Ground
MIC In
ut
9
5. Mono Header - JP4
p
JP4 is a 2-pin, 0.100" spaced header that provides a mono input connection. This input is not currently support ed.
1
2
Ground
Mono In
ut
10
SX-6 CONNECTOR DESCRIPTION
JP1
JP3
JP4
SX-6
Pin Assignment
1 Ground
2nc
3nc
4 Right Out 5 Left Out 6nc
7nc
8 Right Out +
9 Left Out +
12345
6789
Balanced Out - XLR female shell, male pins
SX-6 Balanced I/O to XLR
Balanced Analog I /O Connector
DB-9
Female
- 2
1
Left
+ 3
1
- 2
Right
+ 3
JP2
BALANCED
OUT
12345
6789
12345
6789
Unbalanced Out - Female RCA
SX-6 Unbalanced I/O to RCA
Left
Right
Figure 4. SX-6 Connections
11
LINE OUT (JP2)
Pin 1,3,5,7 No connection
Pin 9 Right Line Out +
Pin 11 Right Line Out –
Pin 13 Left Line Out +
Pin 15 Left Line Out –
Pin 2,4,6,8,10,12,14,16 Ground
This connector duplicates the function of the DB9 connector. It
might be used with a custom “Industrial Rack Mount PC” with a
special cable harness that brought the connections out to the front
panel.
MICROPHONE INPUT (JP3)
Pin 1 Microphone input (2.5
VDC phantom power)
Pin 2 Ground
Install jumper JP4 when phantom power is desired (Electret type
condenser microphone). Omit JP4 when using a dynamic microphone.
12
SX-5e CONNECTOR DESCRIPTION
The SX-5e is self-explanatory. The left and right Line Out connections are RCA jacks on the card bracket, which are labeled.
There are no other connectors on the card.
BALANCED AND UNBALANCED SIGNALS
The SX-5e and the SX-34 have unbalanced signals only. The
SX-6 and SX-36 have balanced signals, which can be wired t o be
connected to unbalanced equipment if desired. (Note t hat in this
discussion, “balanced” has nothing to do with balancing the loudness between the left and right channels of a stereo signal.) Balanced signals use 3 wires for one signal, which is usually transmitted on a shielded twisted pair cable. One of the wires of the
twisted pair carries the signal and the other wire of the twisted pair
carries the inverse of the signal ( the opposite polarit y). These are
sometimes referred to as “hot” and “cold”. The shield is gr ounded
at both ends. The advantage of balanced sig nals is that the receiver is receiving only the voltage difference between the 2 wires
of the twisted pair. Hum and noise picked up by the cable will be
picked up equally by both wires of the twisted pair and rejected by
the balanced receiver. Therefore, balanced connections have
better signal to noise ratios than unbalanced and are essential for
long cable runs. (As a rule of thumb, unbalanced connections are
OK for connections less than 6 feet .) Unbalanced signals use a
coaxial cable, with a center conductor and a shield. T he shield is
grounded at both ends. Unbalanced is sometimes known as “single ended”.
The balanced connections of an SX-6 or SX-36 may be connected to unbalanced equipment if desir ed. For the inputs of the
SX-36, the minus input should be connected to ground and the
signal will be connected to the plus input. When connect ing the
outputs of the Antex card to unbalanced equipment, there ar e two
possible ways to make the connection. The center conductor of
the unbalanced coax cable is connected to the plus output and the
shield is connected to ground. The minus output may then either
be grounded or left floating. Balanced output dr ivers used on the
13
Antex cards are “active”; transformers are not used. Normally,
one should not ground the output of an act ive dr iver. However the
drivers used on the Antex cards are specifically designed to do
this and behave identically to a transformer. The main diff erence
between grounding or not grounding the minus output is that
grounding the output will boost the output level by 6dB (double the
voltage level of the signal). T his is not recommended when using
the trim setting of +20dB, as this will cause the output amplif ier to
begin distorting before digital clipping is reached. The following
table shows what the output signal level will be at the point of
digital clipping for unbalanced output configurations.
Trim = +8 Trim = +20
Output Minus grounded +8 dBu Not recommended
Output Minus floating +2 dBu + 14 dBu
IMPEDANCE AND SIGNAL LEVELS
The concept of matching impedances when connecting equipment is important for r adio f req uency devices such as transm itter s
and antennas, but does not apply to audio equipment in the same
way. What is import ant in audio equipment is minimum load impedance. For example, the balanced output of an SX-36 has an
output impedance of about 100 ohms (50 ohms in each signal
leg), however, if you were to connect it to a 100 ohm load, severe
distortion would result. The output is designed f or 600 ohm minimum impedance, and a higher impedance, such as 10,000 ohms,
would work perfectly.
Matching signal levels is important to achieve optimum performance. Recording from a source with too high a signal level may
cause distortion, even if the level is adjusted in the Antex Mixer
application so that the VU meters show no clipping is occurring.
14
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