Page 1
Kramer Electronics, Ltd.
USER MANUAL
Model:
VA-256P
Digital Audio Delay
Page 2
Contents
Contents
1
Introduction 1
2
Getting Started 1
3
Overview 2
4
Your VA-256P Digital Audio Delay 2
5
Using the VA-256P Digital Audio Delay 4
5.1 Using the VA-256P to Switch and Convert Signals 4
5.2
Using the VA-256P as an Audio Delay Line in the Studio Environment 6
5.3 Setting the Delay Time 7
5.4 Setting the Display Brightness (Dimmer Setting) Level 7
6
Technical Specifications 8
Figures
Figure 1: VA-256P Digital Audio Delay 3
Figure 2: Connecting the VA-256P Digital Audio Delay 5
Figure 3: Using the VA-256P Digital Audio Delay in the Studio Environment 6
Tables
Table 1: Features and Functions of the VA-256P Digital Audio Delay 3
Table 2: Delay Time Settings According to Sampling Rate 7
Table 3: Technical Specifications of the VA-256P Digital Audio Delay 8
i
Page 3
9999992 A1
ADDENDUM (this data is included at the end of the Overview section)
This addendum adds the following information to the user manual:
Caution – No operator-serviceable parts inside unit.
Warning – Use only the Kramer Electronics input power
wall adapter that is provided with this unit1.
Warning – Disconnect power and unplug unit from wall
before installing or removing device or servicing unit.
1 For example: model number AD2512C, part number 2535-000251
2900-
Page 4
Introduction
1 Introduction
Welcome to Kramer Electronics (since 1981): a world of unique, creative and
affordable solutions to the infinite range of problems that confront the video,
audio and presentation professional on a daily basis. In recent years, we have
redesigned and upgraded most of our line, making the best even better! Our
350-plus different models now appear in 8 Groups1, which are clearly defined
by function.
Congratulations on purchasing your VA-256P, which is ideal for professional
audio/video broadcasting and production studios.
The package includes the following items:
VA-256P Digital Audio Delay
Power adapter (12V DC Input)
This user manual2
2 Getting Started
We recommend that you:
Unpack the equipment carefully and save the original box and packaging
materials for possible future shipment
Review the contents of this user manual
Use Kramer high performance high resolution cables3
1 GROUP 1: Distribution Amplifiers; GROUP 2: Video and Audio Switchers, Matrix Switchers and Controllers; GROUP 3:
Video, Audio, VGA/XGA Processors; GROUP 4: Interfaces and Sync Processors; GROUP 5: Twisted Pair Interfaces;
GROUP 6: Accessories and Rack Adapters; GROUP 7: Scan Converters and Scalers; and GROUP 8: Cables and Connectors
2 Download up-to-date Kramer user manuals from the Internet at this URL: http://www.kramerelectronics.com
3 The complete list of Kramer cables is on our Web site at http://www.kramerelectronics.com
1
Page 5
Overview
3 Overview
The Kramer VA-256P is a professional digital audio delay that can be used as
an AES-ID3 (75) to AES/EBU (110) converter, as a digital audio
switcher, and as an audio delay line.
The high-performance VA-256P:
Lets you adjust for lip sync errors so that the audio delay will match the
video delay1
Lets you adjust the brightness of the display via the dimmer setting
Automatically sets the maximum delay time according to the input sample
rate (for each input channel)
Recalls the previously set display brightness level and input settings2 via
its non-volatile memory after powering up
Provides a delay time, ranging from 0 up to 4096 msec3 in increments of
1msec
Is EIAJ CP1201, IEC-60958, AES3, AES-ID3 and AES/EBU compatible,
and supports 32kHz to 96kHz sample frequency range
Is fully transparent to the digital stream, making it ideal for the most
demanding audio applications including home cinema and professional
audio applications (such as PCM, Dolby Digital, DTS, AES and so on)
Is 12VDC fed and is housed in a DigiTOOLS enclosure
To achieve the best performance:
Connect only good quality connection cables, thus avoiding interference,
deterioration in signal quality due to poor matching, and elevated noiselevels (often associated with low quality cables)
Avoid interference from neighboring electrical appliances and position your
Kramer VA-256P away from moisture, excessive sunlight and dust
In applications with high interference, shielded cable will give better results.
4 Your VA-256P Digital Audio Delay
Figure 1 and Table 1 define the VA-256P Digital Audio Delay:
1 An example of a TV broadcasting lip sync error is when the sound is heard before the speaker’s lips move
2 Input sampling rate and delay time for each channel
3 Depending on the input sample rate signal (see Table 2)
2
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Page 6
Your VA-256P Digital Audio Delay
Figure 1: VA-256P Digital Audio Delay
Table 1: Features and Functions of the VA-256P Digital Audio Delay
# Feature Function
1 12V DC +12V DC connector for powering the unit
2
INPUTS
3
4
OUTPUTS
5
6
INPUT SELECTOR 1 Button
7 INPUT SELECTOR 2 Button Press to select the AES/EBU input to route to the
8 - Button1 Press to decrease the delay time2
DELAY
9 + Button1 Press to increase the delay time2
(msec)
10
11 LOCK LED Lights when the audio is locked
AES-ID3 75 BNC Connector Connect to the digital audio source (75)
AES/EBU Detachable
Terminal Block
AES-ID3 75 BNC Connector Connect to the digital audio acceptor (75 )
AES/EBU Detachable
Terminal Block
DELAY (msec) 7-segment
Display
Connect to the digital audio source (110)
Connect to the digital audio acceptor (110)
Press to select the AES-ID3 input to route to the
outputs
outputs
Displays the delay time3
1 For step-by-step response, press and release these button(s) as required. Press continuously for a quicker response
2 Both the - and + buttons are also used to set the brightness of the display (see section 5.4)
3 Ranging from 0 to 4096 msec in increments of 1msec (see section 5.3)
3
Page 7
Using the VA-256P Digital Audio Delay
5 Using the VA-256P Digital Audio Delay
You can use the VA-256P as an AES-ID3 to AES/EBU converter, as a digital
audio switcher, and as an audio delay line within the same application. In the
following examples, the VA-256P is used to:
Switch and convert AES-ID3 to AES/EBU or vice verse (see section 5.1)
Delay the audio signal in the studio environment (see section 5.2)
5.1 Using the VA-256P to Switch and Convert Signals
To connect the VA-256P as the example in Figure 2 illustrates1, do the
following2:
1. Connect the sources as follows:
Connect a digital audio source (for example, the audio output of a
digital video player) to the AES-ID3 75 INPUT BNC connector
Connect an AES/EBU source (for example, a DAT player) to the
AES/EBU detachable terminal block IN connector (using a twisted
pair cable)
2. Connect the acceptors as follows:
Connect the AES-ID3 75 OUTPUT BNC connector to a digital
audio acceptor (for example, a studio mixer)
Connect the AES/EBU detachable terminal block OUT connector
(using a twisted pair cable) to an AES/EBU acceptor (for example, a
DAT recorder)
3. Connect the 12V DC power adapter to the power socket and connect the
adapter to the mains electricity.
4. Press the INPUT SELECTOR 1 or 2 button to select the input source3.
The signal routes to both outputs simultaneously.
5. Set the DELAY, as section 5.3 describes.
6. Set the display brightness if required (see section 5.4).
1 You do not have to connect all inputs and outputs, connect only those that are required
2 Switch OFF the power on each device before connecting it to your VA-256P. After connecting your VA-256P, switch on
the power on each device
3 If a valid digital audio signal is present on the selected input, the green LOCK LED will light
4
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Page 8
Digital
To Video
Processor
Digital Audio
DAT Player
Studio Mixer
DAT
Recorder
Using the VA-256P Digital Audio Delay
Signal
Video
Player
Figure 2: Connecting the VA-256P Digital Audio Delay
5
Page 9
Using the VA-256P Digital Audio Delay
Video Processor
Studio Mixer
SDI
PAL N
PAL N
PAL M
HUE
H-SHIFT
V-SHIFT
Y/GREEN
POWER
Video In
Digital Audio Out
Digital Video Player
5.2 Using the VA-256P as an Audio Delay Line in the Studio Environment
The VA-256P compensates for video processing delay time, as illustrated in
the example shown in Figure 3. In this example, a digital video player outputs
its digital video signal to a video processor (for example, the SP-11D Digital
Video Processor) and its digital audio signal to the VA-256P. The DELAY1
time on the VA-256P is set to compensate for the digital video signal
processing time. So, while the video signal is processed, the audio signal is
delayed, via the VA-256P, to maintain synchronization between video and
audio as both signals enter the studio mixer.
Digital Audio
Out
Video Out
INPUT
PAL B PAL B YUVCV
AUTO
NTSC 3
NTSC 4 NTSC 4
SECAM SECAM
OUTPUT
GENLOCK
RGBYC
RGBSYUV
U/BLUE V/REDCONTRASTH-SHARPDELAY
YUV
RGB
GAIN
BRIGHTV-SHARPSPLITTERSCH STORE
Delayed
Audio In
Digital Audio Delay
Figure 3: Using the VA-256P Digital Audio Delay in the Studio Environment
+
PANEL LOCKRECALL
-
FREEZE
1 See section 5.3
6
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Page 10
Using the VA-256P Digital Audio Delay
5.3 Setting the Delay Time
Set the delay time via the and + buttons1 on the front side-panel. The delay
time is displayed (in msec) on the 7-segment display located next to these
buttons.
The maximum delay time is determined by the input sampling rate, as
described in Table 2:
Table 2: Delay Time Settings According to Sampling Rate
Sampling Rate
[kHz]
32 0 – 4096
44.1 0 – 2960
48 0 – 2720
96 0 – 1360
Delay Time Range
[msec]
The delay time setting (per channel) is saved in the non-volatile memory.
5.4 Setting the Display Brightness (Dimmer Setting) Level
Use the dimmer settings to modify the brightness of the two input buttons and
the display.
To set the brightness (dimmer setting) level, do the following:
1. Press both the + and buttons continuously for 3 seconds.
The two input buttons and the + and – buttons illuminate.
The 7-segment display shows the brightness level2.
2. Press the + or button to increase or decrease the brightness level.
The brightness of the four buttons and the display is adjusted accordingly.
3. After setting the brightness, exit the dimmer setting by either:
Pressing one of the two input buttons. This input is then selected and
the unit returns to normal operation; OR by
Waiting 20 seconds
The unit returns to normal operation
The dimmer setting is saved in the non-volatile memory.
1 In 1msec steps
2 Ranging from 1 to 100
7
Page 11
Technical Specifications
6 Technical Specifications
Table 3 includes the technical specifications:
Table 3: Technical Specifications1 of the VA-256P Digital Audio Delay
INPUTS:
OUTPUTS: 1 digital audio AES-ID3 on a BNC connector, 1 digital audio
SAMPLE RATE: 32, 44.1, 48, 96, 192 kHz sampling frequencies
AUDIO SIGNAL COMPATIBILITY: Digital Audio (S/PDIF): All current broadcast/DVD standards,
AUDIO DELAY CAPABILITIES: 0-4096ms for 32kHz sample rate signals
POWER SOURCE: 12V DC, 300mA
DIMENSIONS: 12 cm x 7.5 cm x 2.5 cm (4.7" x 2.95" 0.98", W, D, H)
WEIGHT: 0.3 kg (0.67 lbs.) approx.
ACCESSORIES: Power adapter, mounting bracket
OPTIONS: 19” rack adapters: RK-T1, RK-T3
1 digital audio AES-ID3, 75 on a BNC connector, 1 digital audio
AES/EBU 110 on a detachable terminal block
AES/EBU on a detachable terminal block
including Dolby Digital, EX, DTS, ES and PCM
Audio sample rates of 32kHz, 44.1kHz, 48kHz (standard DVD) and
96kHz (DTS 96/24)
0-2960ms for 44.1kHz sample rate signals
0-2720ms for 48kHz sample rate signals
0-1360ms for 96kHz sample rate signals
2 user programmable presets (1 per input)
1 Specifications are subject to change without notice
8
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Page 12
LIMITED WARRANTY
Kramer Electronics (hereafter Kramer) warrants this product free from defects in material and workmanship under the
following terms.
HOW LONG IS THE WARRANTY
Labor and parts are warranted for seven years from the date of the first customer purchase.
WHO IS PROTECTED?
Only the first purchase customer may enforce this warranty.
WHAT IS COVERED AND WHAT IS NOT COVERED
Except as below, this warranty covers all defects in material or workmanship in this product. The following are not covered
by the warranty:
1. Any product which is not distributed by Kramer, or which is not purchased from an authorized Kramer dea ler. If you are
uncertain as to whether a dealer is authorized, please co ntact Kramer at o ne o f the agents listed in the Web site
www.kramerelectronics.com.
2. Any product, on which the serial number has been defaced, modified or removed.
3. Damage, deterioration or malfunction resulting from:
i) Accident, misuse, abuse, neglect, fire, water, lightning or other acts of nature
ii) Product modification, or failure to follow instructions supplied with the product
iii) Repair or attempted repair by anyone not authorized by Kramer
iv) Any shipment of the product (claims must be presented to the carrier)
v) Removal or installation of the product
vi) Any other cause, which does not relate to a product defect
vii) Cartons, equipment enclosures, cables or accessories used in conjunction with the product
WHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FOR
We will pay labor and material expenses for covered items. We will not pay for the following:
1. Removal or installations charges.
2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are the
responsibility of the Kramer dealer from whom the product was purchased.
3. Shipping charges.
HOW YOU CAN GET WARRANTY SERVICE
1. To obtain service on you product, you must take or ship it prepaid to any authorized Kramer service center.
2. Whenever warranty service is required, the original d ated invoice (o r a copy) must be presented as proof of warranty coverage,
and should be included in any shipment of the product. Please also include in any mailing a contact name, company, address, and
a description of the problem(s).
3. For the name of the nearest Kramer authorized service center, consult your authorized dealer.
LIMITATION OF IMPLIED WARRANTIES
All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to
the length of this warranty.
EXCLUSION OF DAMAGES
The liability of Kra mer for any eff ective products is limited to the repair or replace ment of the product at our option. Kramer
shall not be liable for:
1. Damage to other pro perty caused by defects in this product, damages based upon inconve nience, loss of use of the product , loss
of time, commercial loss; or:
2. Any other damages, whether incidental, consequential or otherwise. Some countries may not allow limitations o n how long an
implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so t he above
limitations and exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which vary from place to place.
NOTE: All products returned to Kramer for service must have prior approval. This may be obtained from your dealer.
This equipment has been tested to determine compliance with the requirements of:
EN-50081: "Electromagnetic compatibility (EMC);
EN-50082: "Electromagnetic compatibility (EMC) generic immunity standard.
CFR-47: FCC Rules and Regulations:
CAUTION!
Servicing the machines can only be done by an authorized Kramer technician. Any user who makes changes or modifications to
the unit without the expressed approval of the manufacturer will void user authority to operate the equipment.
Use the supplied DC power supply to feed power to the machine.
Please use recommended interconnection cables to connect the machine to other components.
generic emission standard.
Part 1: Residential, commercial and light industry"
Part 1: Residential, commercial and light industry environment".
Part 15: “Radio frequency devices
Subpart B – Unintentional radiators”
9
Page 13
For the latest information on our products and a list of Kramer
distributors, visit our Web site: www.kramerelectronics.com,
where updates to this user manual may be found.
We welcome your questions, comments and feedback.
Safety Warning:
Disconnect the unit from the power supply before
opening/servicing.
Caution
Kramer Electronics, Ltd.
Web site: www.kramerelectronics.com
E-mail: info@kramerel.com
P/N: 2900-000102 REV 1
Loading...