Related Manuals for Sencore DigiPro DA795
Summary of Contents for Sencore DigiPro DA795
- Page 1 DA795 DigiPro Digital Audio Analyzer Operation Manual (Firmware version 1.17) 3200 Sencore Drive, Sioux Falls, SD 57107 http://www.sencore.com mailto:sales@sencore.com 1.800.736.2673 or 1.605.339.0100...
- Page 2 Sencore reserves the right to make changes in specifications and other information contained in this publication without prior notice, and the reader should in all cases consult Sencore to determine whether any such changes have been made. This manual may not be reproduced, and is intended for the exclusive use of Sencore users.
- Page 3 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual DA795 DigiPro Digital Audio Analyzer Operation Manual (Firmware version 1.17) 3200 Sencore Drive, Sioux Falls, SD 57107...
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Page 4: Table Of Contents
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual TABLE OF CONTENTS SAFETY PRECAUTIONS ..............inside front cover DESCRIPTION........................ 1 Introduction ..........................1 Features..........................2 Specifications .........................4 Accessories..........................6 I/O CONNECTIONS ......................7 Input Panel (Bottom when viewing display) ...............7 Digital Input 1........................7 Digital Input 2........................7 Power Adapter Input Jack....................7 Power Switch........................7 Battery Compartment......................7... - Page 5 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual DIGITAL TESTS MENU....................27 Digital Lock Test........................28 Video Lock Test........................30 Transparency Test .......................32 Latency Test.........................34 Jitter Meter ...........................36 SYSTEM TOOLS MENU....................38 Level Meter ..........................39 LAeq Dialog Level ........................41 Signal Generator ........................42 Sweeps ..........................44 Pass Mode ...........................47 UTILITIES MENU......................
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Page 6: Description
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual DESCRIPTION Introduction The DigiPro Digital Audio Analyzer is a multi-function, dual-domain precision digital audio test instrument. The DigiPro provides a powerful, complete set of test, troubleshooting and utility functions for digital audio analysis, in a hand-held DSP-powered device. The DigiPro allows you to analyze any professional or consumer format stereo digital audio signal, and generate low-noise digital test signals, all at up to 24-bit/96k-sample rate resolution. -
Page 7: Features
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Features Bitstream Analyzer- Totally analyzes digital audio stream characteristics, checking header status bytes, plus actual word length and sample rate, bit activity, and low voltage. Digital Watchdog - Captures signal errors for a test period and graphs the errors. Clock / Sample Counter - Measures the actual digital sample rate, word clock, and superclock frequencies for a digital audio signal. - Page 8 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Pass Mode – Passes a digital input signal through to the output with any selected modifications. Possible signal modifications include changing header information, performing sample-rate conversion (from 44.1 kHz to 96 kHz), changing signal formats (AES/SPDIF/ADAT), adding digital gain or attenuating the signal.
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Page 9: Specifications
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Specifications Digital Input/Output Digital Signal Formats AES-3 S/PDIF coaxial S/PDIF optical (Toslink) ADAT Lock Detect Lock detect: <1 ppm. Digital Watchdog Minimum Test Period: 1 minute Maximum Test Period: 24 hours Minimum length of detected error, all test times: 1 sample Transparency Test Maximum number of errors per channel: 65,536. - Page 10 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual General/Environmental Input Impedances XLR digital inputs: 110 kohms, nominal S/PDIF digital inputs: 75 kohms, nominal BNC Word Clock/Video input: 75 kohms, nominal Output Impedances XLR digital output: 110 ohms, nominal S/PDIF digital output: 75 ohms, nominal Word Clock digital output: 75 ohms, nominal ¼”...
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Page 11: Accessories
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Accessories DA795 Digital Audio Analyzer Accessories Sencore Description Photo Part #s XLR Audio Cable – a 12 ft. microphone cable for interfacing 13G122 balanced audio inputs and outputs to the DA795. supplied Serial Interface Adapter Cable –... -
Page 12: I/O Connections
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual I/O Connections Input Panel (Bottom – when viewing display) Digital Input 1 Digital Input 1 connectors include an AES/EBU input, the S/PDIF input, and an optical input connector, which supports both ADAT and S/PDIF (Toslink) format. These inputs are selectable within most DigiPro functions. -
Page 13: Output Panel (Top When Viewing Display)
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Output Panel (Top – when viewing display) Digital Audio Outputs Digital output connectors include an AES/EBU output, S/PDIF coaxial output, ADAT/Toslink optical output, and a Word Clock Output. The ADAT output sends out a copy of the stereo digital audio data on all four ADAT stereo pairs. -
Page 14: Battery Module Information
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Battery Module Information Battery Module Introduction The battery module consists of a battery with a battery charger board mounted directly on the battery. It has two coaxial power connectors mounted on it, one that accepts the AC power adapter plug, and one that mates with the DigiPro internally. -
Page 15: Clocks & Routing
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Clocks & Signal Routing Digital audio equipment locks an oscillator to an incoming digital audio signal, clock, super- clock or sync signal. The DA795’s internal receiver (Master Oscillator) may be locked to an internal clock (a crystal), or an external input signal which can come from various input signal sources. -
Page 16: User Interface
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual User Interface User Interface Features The DA795 has many functions, features, and options. To make it easier to use the functions, commonly used control fields are located in the Top Toolbar and Bottom Toolbar, and are the same on most screens. -
Page 17: Saving Preferred Settings
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Saving Preferred Settings Many DA795 functions have control fields that you might want to have default to the same setting every time you turn the unit on. The following control fields can have their current setting saved as their default value: digital input source, sub-menu choices on all of the functions, and generator settings, including lock source, word length, frequency, and level. -
Page 18: Bottom Toolbar
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Input Sample Rate. This field displays the measured sample rate of the digital input signal, with a resolution of 0.1 kHz. Note that this is the actual running sample rate, not just a reporting of the signal status bytes. -
Page 19: Digital Output And Generator Control
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Analog Output Source. This field switches between Monitor and Generator for the analog output. M selects the digital input for monitoring; G selects the internal generator (or whatever digital output signal is present). Switching from Monitor to Generator changes the source data for the DAC from the input digital receiver circuit to the output digital transmitter. - Page 20 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual ADAT sync connector (pin 8 of the DB-9 connector) and the Word Clock BNC input share the same input line. To use the ADAT sync connector (DB-9 connector, pin 8), select the Word Clock input and remove any connectors from it.
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Page 21: Analysis Functions Menu
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual ANALYSIS FUNCTIONS The Analysis Functions menu contains functions that are useful in analyzing digital audio signals. The standard input source is Digital Input 1. The Analysis Functions menu includes the following functions: Bitstream Analyzer Digital Watchdog Clock/Sample Counter... -
Page 22: Bitstream Analyzer
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Bitstream Analyzer Description The Bitstream Analyzer displays a complete actual digital data to allow you to detect analysis of a digital audio signal, including status errors. Being able to view a complete the digital signal type, sample rate, word set of channel data allows you to quickly length, carrier amplitude, digital audio level,... - Page 23 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Field 1: Status Use. (Pro/Con) AES3 connections generally send professional data. SPDIF and Toslink connections generally send consumer data. This bit determines how other channel status information is interpreted. Professional: Field 2: Sample Rate. 32 kHz; 44.1 kHz; 48 kHz; not indicated (---) Field 3: Word Length.
- Page 24 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Detail Screen. The Detail screen provides a detailed view of the channel status bytes. Click on the “Status” title to switch to the Detail screen. Click on the title “Detail” to switch back to the Status screen.
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Page 25: Digital Watchdog
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Digital Watchdog Description The Digital Watchdog monitors a digital For example, if you set the test length to 2 signal over an extended time period to detect hours (120 minutes), at the end of each errors or level overloads. - Page 26 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual o # of Errors. The total number of errors within the data period selected by the cursor is displayed here. o Error Codes. The error codes are displayed when the cursor is placed over any data period that displays an error bar.
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Page 27: Clock/Sample Counter
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Clock/Sample Counter Description The Clock/Sample Counter accurately clock (Fs) and video frame frequencies. For measures incoming sample rates (FS) of bit clocks and word clocks, the corresponding digital signals, as well as bit clock, word sample rate is also computed. -
Page 28: Bitscope
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual BitScope Description The BitScope displays a decoded digital audio purposes. Two channels of a digital audio signal in the time domain, on an oscilloscope- signal can also be compared, in the X-Y like screen. - Page 29 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual actually at –6 dB FS. By setting this field to a lower negative number, you can zoom into the digital signal, essentially applying gain to the input. You can reduce this number to -120 dB FS, applying 120 dB of digital gain.
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Page 30: Distortion Meter
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Distortion Meter Description The Distortion Meter measures the total The Distortion Meter can measure distortion harmonic distortion plus noise (THD+N) of a down to about -118 dB (the distortion in the digital audio signal. A narrow digital notch DA795 digital sine wave generator is near the filter eliminates the fundamental frequency theoretical minimum of -145 dB), so any... - Page 31 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual o Distortion Scale. Displays the percentage distortion with a pointer on a linear distortion bar scale. The midpoint marks are half the value of the marked points to their left (50, 5, 0.5, etc.).
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Page 32: Digital Tests Menu
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual DIGITAL TESTS The Digital Tests menu contains functions that are used to test equipment, and to isolate potential problems. The input source for these tests is Digital Input 1 and/or Digital Input 2. The Digital Tests menu includes the following tests: Digital Lock Test Video Lock Test... -
Page 33: Digital Lock Test
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Digital Lock Test Description The Digital Lock Test tests whether a digital Note that if the frequency difference is large input (AES/EBU or S/PDIF) is locked to (defined here as greater than 4 Hz) the signals another digital input, to the word clock, a are considered out of lock. - Page 34 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual to the input optical connector, or an ADAT sync signal to the DB-9 connector. Select this input on the Top Toolbar. Read the results. Read the absolute frequency drift on the numeric display, or on the horizontal bar scale.
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Page 35: Video Lock Test
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Video Lock Test Description The Video Lock Test allows you test whether then compared to the ideal ratio, to determine a digital audio signal in AES/EBU, S/PDIF, the amount of drift, using this formula: or ADAT format is locked with a video sync Vf/hr = ABS(1 –... - Page 36 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Video Lock Test Display/Controls Digital Sample Video Frame Freq. Rate Frame Drift/hr. Frame Drift Scale o Digital Sample Rate. The actual sample rate of the signal at Digital Input 1. o Video Frame Frequency. The frame rate of the video signal at the BNC Video In connector. o Frame Drift/hr.
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Page 37: Transparency Test
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Transparency Test Description The Transparency Test checks whether a The DigiPro Transparency Test can run piece of digital equipment passes a signal synchronously (analyzing the input as the without modifying it. The Transparency Test DigiPro generates the test signal), or supplies one of several bit pattern test signals asynchronously (analyzing a previously... - Page 38 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Digital DC. You may select any particular word value, in hex, for the output signal. o DC Value. Used to set the output value for the Digital DC test waveform. o Errors L / R. Displays the number of errors since the test was started, for both the left and right channels.
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Page 39: Latency Test
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Latency Test Description The Latency Test measures the amount of in milliseconds. The Latency Test can be delay (latency) that a piece of digital performed on a piece of equipment with a equipment is applying to a signal. - Page 40 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Select the output type. You can select analog or digital output. Select analog when you are testing the delay of analog-to-digital converters. Select digital for testing delay through digital systems. Connect and select the input signal. Connect the output of the DUT to one of the Digital Input 1 connectors;...
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Page 41: Jitter Meter
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Jitter Meter Description The Jitter Meter measures the RMS interface being extrapolated from sideband information jitter through a digital AES/EBU or S/PDIF derived from an FFT of an analog domain input, or the RMS clock jitter through the signal. - Page 42 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Read the results. The jitter is shown in the scale and/or displayed as a measurement value below the scale in nonoseconds (nS) or picoseconds (pS). Note: The internal analog-to-digital converter (ADC), which is used to measure the output of the jitter board, is clocked by the system master clock.
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Page 43: System Tools Menu
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual SYSTEM TOOLS The System Tools menu contains general purpose digital audio tools. The standard input source is Digital Input 1. The System Tools menu includes the following functions: Level Meter LAeq Dialog Level Signal Generator Sweeps Pass Mode... -
Page 44: Level Meter
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Level Meter Description The Level Meter measures the level of both The Level Meter measures the Left and left and right channel PCM audio signals Right input levels simultaneously, using The within an AES, S/PDIF, or ADAT digital Digital Input 1 connectors, and provides a digital, numeric display. - Page 45 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual % peak – Percentage of full digital scale of the waveform peaks. o Level. These fields display the left and right channel levels of the digital audio signals present at the input connector. VU/PPM Screen.
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Page 46: Laeq Dialog Level
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual LAeq Dialog Level Description LAeq Dialog Level computes the average of the program material is 27 dB below RMS level of the mixed (combined) digital maximum digital level (0 dB FS). audio signal from Digital Input 1. This The DigiPro assists broadcasters in meeting information can be used to set the Dolby the FCC A/53 Annex B 5.5 Dialogue Level... -
Page 47: Signal Generator
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Signal Generator Description The DigiPro Signal Generator is a full- Generator controls in the Bottom Toolbar of featured, crystal-controlled signal generator the other functions. In the Generator screen, that creates digital test signal test tones and you can select the waveform type and standard noise waveforms. - Page 48 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual o Digital Level Graph. Indicated digital audio output level. The digital audio level can be adjusted from 0 db FS to –140 dB FS. o Level Control. The level can be adjusted from the Generator screen Level Control field, in 10, 1, or 0.1 dB steps, or from the Bottom Toolbar, in 1 dB steps.
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Page 49: Sweeps
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Sweeps Description graphically, and the measurement cursor can The DA795 provides two sweep modes: be used to read the level at the specific Amplitude sweep and Sine sweep. The sine frequencies. sweep parameters are also applied to the The sine sweep provides a stepped sine amplitude sweep mode. - Page 50 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual point on the plot. To position the measurement cursor, click on the Cursor Frequency field to select it (underlined). Rotate the control knob to move the cursor to the desired frequency. The value displayed in the Cursor Level field is the digital audio level (relative to the maximum digital level), at the frequency selected by the measurement cursor.
- Page 51 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Sine Sweep 1. Select the Sine sweep mode. 2. Connect any of the DA795 digital or analog outputs to the device input. 3. Select the start frequency. 4. Select the end frequency. 5.
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Page 52: Pass Mode
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Pass Mode Description The Pass Mode function is made to modify a The digital input data can be transferred to the digital signal. You are able to change channel digital output at the same sample rate at status information, change the signal sample which it comes in, or it can be sample-rate rate (sample rate conversion), change signal... - Page 53 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Professional: Field 2: Sample Rate. 32 kHz; 44.1 kHz; 48 kHz; not indicated (---) Field 3: Word Length. 16 to 24 bits; not indicated (---) Field 4: Channel Mode. 2ch; 1ch; not indicated (---) Field 5: Emphasis.
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Page 54: Utilities Menu
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual UTILITIES The Utilities menu contains two general purpose digital audio functions. The Utilities menu includes the following functions: Digital Cable Tester Capture Sample Data Save Defaults About The Utilities menu, showing the available functions. -
Page 55: Digital Cable Tester
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Digital Cable Tester Description The Digital Cable Tester tests digital jitter detector circuit to measure the AES/EBU or S/PDIF cables for functional resultant jitter. Higher quality digital quality. The DigiPro digital cable tester uses cables have lower capacitance, thus they the Julian Dunn J-test waveform to excite induce less jitter in a signal transmitted... -
Page 56: Capture Sample Data
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Capture Sample Data Description The Capture Sample Data function can be capture buffer is 0x0C00 (3,328 decimal) used to capture a buffer of data from the words. S/PDIF or AES input. It will capture data This function was written to debug an AC-3 whether or not it is PCM (audio) data. - Page 57 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Capture Bytes (Count). Enter a value into the Count field, leaving all of the other Capture Control fields blank. When you click the Play icon, the DigiPro will capture the number of bytes entered.
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Page 58: Save Defaults
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual Save Defaults Description The following control fields can have their current setting saved as their default value: o Digital input source. o Sub-menu choices on all functions. o Generator settings, including lock source, word length, frequency, and level. Save Defaults Operation To store the current settings so that the DA795 starts up next time set this way, set up the DA795 the way that you want it, go to the Save Defaults function on the Utilities menu, and select... -
Page 59: About
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual About Displays the firmware version loaded into the DA795, along with technical support contact information. -
Page 60: Glossary
DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual GLOSSARY This section defines common terms used in this manual. ADAT – Alesis Digital Audio Tape. A digital audio transmission format invented and patented by Alesis, originally for use with their digital tape recorders. Format usually runs at 48 kHz sample rate, with each frame containing up to eight channels of 24-bit digital audio. - Page 61 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual DUT – Device Under Test, the unit being tested. Fs – Sample Frequency. See Sample Rate. Hex – Short for hexadecimal, or base 16 number system. A digit is 0-9 or A-F (A=10, B=11, ...F=15).
- Page 62 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual and prosumer equipment. The term 'Toslink' is now often used generally to describe that particular type of optical cable and connector, regardless of the digital data stream. Word Clock –A square wave signal that runs at the sample frequency (Fs). Word clock is often used to lock (synchronize) digital audio devices.
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Page 63: Warranty & Service Information
Save the original shipping carton and packing material for reuse should you ever need to ship your generator, or return it to the Sencore factory for repair. 1. If you are returning the unit to Sencore for service, call the service department at the number below and enclose the following information: owner's address, billing information, purchase order (if applicable), name and phone number of contact person, description of problem and reason for return. - Page 64 DA795 DigiPro Digital Audio Analyzer Form7494 Operation Manual 3200 Sencore Drive Sioux Falls, SD 57107 Innovatively designed Call 1-800-SENCORE (736-2673) with your time in mind. www.sencore.com Form7494 Printed in U.S.A.