Related Manuals for Antex electronics SX-7
Summary of Contents for Antex electronics SX-7
-
Page 1: For Dos
SX-7 SX-9 SX-11 SX-12a SX-20 SX-22 SX-23e SX-26 Digital Audio Adapter User's Manual For DOS and Windows January 25, 1996 ANTEX ELECTRONICS CORPORATION 16100 SOUTH FIGUEROA STREET GARDENA, CALIFORNIA 90248 9000-2347-7006... -
Page 2: Table Of Contents
INTRODUCTION................4 ABOUT DIGITAL AUDIO .............4 MINIMUM HARDWARE RECOMMENDED ........7 ADAPTER INSTALLATION ............7 JUMPER SETTINGS ............7 I/O ADDRESSES AND INTERRUPTS......7 SX-12a, SX-20 ..............8 SX-7..................8 SX-9, SX-11 ..............10 SX-22, SX-23e, SX-26.............11 DRIVER INSTALLATION.............16 DISKS................16 WINDOWS DRIVER INSTALLATION ......16 WINDOWS DRIVER CONFIGURATION ......17 DOS DRIVER INSTALLATION........17... - Page 3 Figure 1: Analog-to-Digital Conversion........5 Figure 2: Digital-to-Analog Conversion........6 Figure 3: SX-12a, SX-20 Connector Locations ......8 Figure 4: SX-7 Connector Locations ..........9 Figure 5: SX-9 and 11 Connector Locations ......11 Figure 6: SX-22, 23e and 26 Connector Locations....13 Figure 7: SX-22, 23e and 26 Balanced Connectors....14 Figure 8: SX-22, 23e and 26 Digital Connectors......15...
-
Page 4: Introduction
INTRODUCTION The Series 2 Digital Audio Adapters are IBM AT compatible add-on boards which convert high fidelity analog signals to digital data for storage to, and retrieval from, disk. The Series 2 adapters sample two channels of audio from 6.25 kHz to 50kHz with 16 bit resolution. They incorporate Sigma Delta technology with 64 times oversampling, providing superior fidelity at greater than 90 dB signal-to-noise ratio. -
Page 5: Figure 1: Analog-To-Digital Conversion
The number of these bits generated each second is a function of sampling rate. At a relatively low sampling rate of 8 kHz (suitable for voice) far fewer code bits are produced each second than, for exam- ple, at the 44.1 kHz sampling rate used for commercial compact disks. For a two-channel stereo signal at a 44.1 kHz sampling rate, some 1.4 million bits are generated each second. -
Page 6: Figure 2: Digital-To-Analog Conversion
of Figure 2. This signal is then passed through a low-pass filter, which removes the digital "switching noise." The end result, shown in the bottom half of Figure 2 is an analog output signal whose waveshape is a very close approximation of the original analog input signal. The foregoing is a very brief and, of necessity, oversimplified explanation of how digital audio works. -
Page 7: Minimum Hardware Recommended
These SX series adapters have four hardware jumpers. They are JP1, JP2, JP3 and JP4, which are used for multiple board operation. JP1 should be installed for a single board system. NOTE: On the SX-7, jumper JP2 serves as the adapter selection jumper. Adapter 1 is at the top, with adapter 4 at the bottom. -
Page 8: Sx-12A, Sx-20
>10k ohms SX-7 There are four external connectors located on the SX-7 audio board's metal mounting bracket. See Figure 4. There is also one three pin header (JP1) for an optional user-supplied headphone connection, which would allow for a front panel headphone jack. -
Page 9: Figure 4: Sx-7 Connector Locations
LEFT RIGHT G ND DB-9 Balanced Out SX-7 Headphones Unbalanced Right Unbalanced Left Assignment Balanced Analog I /O Connector Right Out - Left Out - DB-9 Female Right Out + Left Out + Figure 4: SX-7 Connector Locations... -
Page 10: Sx-9, Sx-11
Audio Output: Line: Unbalanced - RCA jacks, 2VRMS/+6dBV max (digital clipping), with an impedance of 470 ohms and a load impedance of > 10 k ohms Balanced - Nine pin D connector, -16 dBm maximum, with an impedance of 47 ohms and a load impedance of 600 ohms Headphone: 1/4"... -
Page 11: Figure 5: Sx-9 And 11 Connector Locations
Adapter # Jumper Block B al a nced Analog Header SP-100 Header nnnnnnnnnnnn nnnnnn nn nnnnnnnnnnnn nnnnnn nn DB-9 Balanced Out SX-9/SX-11 SP-100 Stereo Mini Headphones apt-X adapter Unbalanced Right Unbalanced Left AES/EBU, S/PDIF Digital Out Assignment Ground 7 pin Mini DIN Female Out - AES/EBU+ or S/PDIF+ Out - AES/EBU - or S/PDIF- AES/SPDIF sense - This line... - Page 12 The SX-22 balanced analog I/O levels are specified in dBu, where 0 dBu is 0.775 Vrms or 2.19Vpp for a sinewave. If an I/O is connected as unbalanced then the level is 1/2 the balanced I/O. The adjustable level is referred to as Trim. The following Trim settings are available on the SX-22.
-
Page 13: Figure 6: Sx-22, 23E And 26 Connector Locations
Headphone (SX-22, SX-23e & SX-26): 1/4" stereo phone jack, 0.5 VRMS into 600 ohms or greater. AES/EBU Digital (SX-22, SX-23e & SX-26): 7 pin Mini DIN jack. Professional AES/EBU: EIAJ CP-340 Type I / IEC-958 Pro or Consumer S/PDIF: EIAJ CP-340 Type II / IEC-958 Consumer Adapter # Jumper Block Balanc ed Analog Header Balanced I/O... -
Page 14: Figure 7: Sx-22, 23E And 26 Balanced Connectors
Balanced In - XLR male shell, female pins Left Unbalanced In - Female RCA Right Left Right Left Left Right Right Balanced Out - XLR female shell, male pins Unbalanced Out - Female RCA SX22 Balanced I/O to XLR SX22 Unbalanced I/O to RCA Balanced Analog Header Assignment Assignment... -
Page 15: Figure 8: Sx-22, 23E And 26 Digital Connectors
Assignment 7 pin Mini DIN Female Ground In - AES/EBU - Out - AES/EBU+ or S/PDIF+ In - AES/EBU + Out - AES/EBU - or S/PDIF- In - S/PDIF+ AES/SPDIF sense - This line should be connected to Ground for AES/EBU operation and left floating for S/PDIF Digital I/O header - JP7 8 (nc) -
Page 16: Sx-22, Sx-23E, Sx-26
DRIVER INSTALLATION DISKS Disk 1. The "WINDOWS DRIVERS" disk contains Windows drivers and applications (Note: The DOS 3.2/Windows 2.0 drivers continue to come on a single disk): · ANTEXWAV.DRV - Windows Wave Driver for SX3, SX5e, SX7, SX9, SX11, SX12a, SX20, SX22, SX23e, SX26, SX33, SX33e, Z1, Z1e ·... -
Page 17: Windows Driver Configuration
3. In Program Manager, click on File then Run.. 4. Enter A:SETUP in the command line box, then press OK. 5. When the driver installation is complete, Windows should restart automatically. If not, exit then restart Windows manually. WINDOWS DRIVER CONFIGURATION To change the adapter type, I/O address and interrupt settings of the Windows driver: 1. - Page 18 DOS DRIVER INSTALLATION 1. Insert the DRIVERS disk into your floppy drive (assumed to be A:) 2. Type A: 3. Type INSTALL driveletter:\path to copy all files from the disk to a subdirectory on your hard disk. ex. INSTALL C:\ANTEX REMEMBER: When the Windows driver installation is complete, Windows should restart automatically.
-
Page 19: Using Dos Demonstration Software
USING DOS DEMONSTRATION SOFTWARE On the enclosed disk is the demonstration software for the SX-7, SX-9, SX-11, SX-12a, SX-20, SX-22, SX-23e and SX-26 boards. Filenames are as follows: Driver Program SX25.EXE DOS Demonstration Program ADG.EXE To run the Demonstration Software: 1. -
Page 20: Figure 9: Dos Demo Environment
Figure 9: DOS Demo Environment KEY COMMANDS: Q-Quit Quits the demo program and returns to DOS. C-Channels Allows choice of channel configuration. MONO-Single channel record/play. STEREO-Dual channel record/play. T-Format The format for encoding or decoding audio data: PCM16 - 16 Bit Pulse Code Modulation, uncompressed. PCM8 - 8 Bit Pulse Code Modulation, uncompressed. - Page 21 CDIB - Compact Disk Interactive level B compression, CD-ROM XA compatible. CDIC - Compact Disk Interactive level C compression, CD-ROM XA compatible. DOLBY - Dolby AC-2 Compression. MPEG - ISO/MPEG-1, Layer I/II. Refer to "ISO/MPEG-1 BITRATES & FORMAT EXTENSIONS " for more information. A-law - CCITT G.711 compression (European).
- Page 22 To adjust the playback volume, click the mouse over the < or > symbol on the screen. < lowers the volume from 0 to -30 dB in one dB increments. > raises the volume from -30 to 0 dB in one dB increments.
-
Page 23: Problems Running The Demo
PROBLEMS RUNNING THE DEMO Symptom: The screen appears to be frozen. Solutions: 1. Verify that the driver is loaded. 2. Make sure you type the correct I/O and interrupt locations on the command line of ADG. 3. Make sure to use the HEX value for the I/O. 4. -
Page 24: Using Windows Demonstration Software
USING WINDOWS DEMONSTRATION SOFTWARE Figure 10: The Antex Demo Window. The Antex Demo program allows basic recording and playback of .WAV files in any of the compression formats available on the Antex Audio board you have installed in your system. Sample Rate This list box selects specific sample rates for recording, and displays the sample rate of the file that is currently playing. -
Page 25: Figure 12: File Open Dialog Box
Channels: These buttons select mono or stereo recording, and displays the current files number of channels. VU Meters: The VU meters show the relative signal of the current file that is being recorded or played. Wave Device: If your computer has more than one Antex Audio board, this drop down list box will allow selection of the specific board to be used for recording and playback. - Page 26 Record/Stop: Once a file has been selected, pressing the record button will start the recording. During recording, this button changes to "Stop". If a file has not been selected the "Save As" dialog box appears and allows selection of a specific file to record into. Volume: These controls allow changing the volume of the playback only.
-
Page 27: Antex Mixer
ANTEX MIXER The ANTEX Mixer allows you to control the volume of the inputs and outputs on the ANTEX digital audio cards. The Mixer is also the way you route audio sources to either the record bus, for recording to hard disk, or to the play bus, which diverts signals to the line outputs. -
Page 28: Play Mode (Feedthrough)
PLAY MODE (Feedthrough) The play bus is a composite mix of all audio inputs with their PLAY buttons pressed. This mix is routed to the output jacks. Note: You must toggle the button to REC if you want to record audio to the hard disk. MIXER DEVICES LINE IN jack. -
Page 29: Utilizing Digital Audio Compression Under Windows
UTILIZING DIGITAL AUDIO COMPRESSION UNDER WINDOWS At this point in time Microsoft is in the early stages of supporting various compression formats for waveform audio under Windows. An update to the multimedia standards was released that defines the methods of passing data about compressed files as well as a preliminary list of recognized compression formats. - Page 30 Product 8-Bit 16-Bit SONY CDIB Dolby MPEG MSADPCM A-Law apt-X m-Law ADPCM CDIB& CDIC AC-2 SX-5e SX-7 SX-9 SX-11 SX-12a SX-20 SX-22 SX-23e SX-26 SX-3 Z1e/ SX-33 SX-33e R = record capability P = play capability * current DSP software supports play mode only, but record capability will be added soon...
-
Page 31: Iso/Mpeg-1 Bitrates & Format Extensions
ISO/MPEG-1 BITRATES & FORMAT EXTENSIONS ISO/MPEG supports several compression rates and encodes flags that describe the audio data. The flags and other options are selected by typing MPEG with[extensions] switches in the Format text box of the DOS demo. (The bitrates in the Windows demo are selected by double-clicking on MPEG in Compression list to get a bitrate drop-down menu) MPEG[extensions]"... - Page 32 In the Antex driver the bitrate is specified on a per-channel basis. Therefore, requesting 64 kbits/s and stereo will result in a 128 kbits/s compressed MPEG stream. Supported bitrates (per channel) and compression ratios are as follows: Layer I 32 Khz 44.1 Khz 48 Khz Bitrate...
Need help?
Do you have a question about the SX-7 and is the answer not in the manual?
Questions and answers