Kramer Electronics Car Amplifier VA 4 User Manual

KRAMER ELECTRONICS LTD.  
USER MANUAL  
MODEL:  
VA-4  
Dual Channel Balanced Stereo  
Audio Amplifier  
P/N: 2900-000004 Rev 2A  
 
1
Introduction  
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been  
providing a world of unique, creative, and affordable solutions to the vast range of  
problems that confront video, audio, presentation, and broadcasting professionals  
on a daily basis. In recent years, we have redesigned and upgraded most of our  
line, making the best even better!  
Our 1,000-plus different models now appear in 11 groups that are clearly defined  
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;  
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 5:  
Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP 7:  
Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9:  
Room Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11:  
Sierra Products.  
Congratulations on purchasing your Kramer VA-4 Dual Channel Balanced Stereo  
Audio Amplifier, which is ideal for the following typical applications:  
Presentation audio level control  
Recording studios and broadcast studios for on-line signal distribution  
VA-4 - Introduction  
1
 
 
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 cables  
Go to http://www.kramerelectronics.com to check for up-to-date user  
manuals, application programs, and to check if firmware upgrades are  
available (where appropriate).  
i
2.1  
Achieving the Best Performance  
To achieve the best performance:  
Use only good quality connection cables to avoid interference, deterioration  
in signal quality due to poor matching, and elevated noise levels (often  
associated with low quality cables)  
Do not secure the cables in tight bundles or roll the slack into tight coils  
Avoid interference from neighboring electrical appliances that may adversely  
influence signal quality  
Position your Kramer VA-4 away from moisture, excessive sunlight and dust  
This equipment is to be used only inside a building. It may only be  
connected to other equipment that is installed inside a building.  
!
2.2  
Safety Instructions  
Caution:  
No operator serviceable parts inside the unit  
!
Warning: You use only the power cord that is supplied with the  
unit. Do not open the unit. High voltages can cause  
electrical shock! Servicing by qualified personnel only.  
Warning: Disconnect the power and unplug the unit from the wall  
before installing  
2
VA-4 - Getting Started  
 
     
2.3 Recycling Kramer Products  
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC  
aims to reduce the amount of WEEE sent for disposal to landfill or incineration by  
requiring it to be collected and recycled. To comply with the WEEE Directive,  
Kramer Electronics has made arrangements with the European Advanced  
Recycling Network (EARN) and will cover any costs of treatment, recycling and  
recovery of waste Kramer Electronics branded equipment on arrival at the EARN  
facility. For details of Kramer’s recycling arrangements in your particular country  
VA-4 - Getting Started  
3
 
 
3
Overview  
The VA−4 is a volume controller for two channels of balanced stereo audio signals  
on XLR connectors. The volume of each stereo channel can be adjusted  
independently of the other stereo channel.  
The VA-4:  
Features a digitally controlled volume control function  
Uses high quality low distortion audio components, enabling transparent  
processing of the audio signals  
Lets you control the audio gain of each channel via the front panel or via  
RS-232  
Includes a bright 7-segment LED display on the front panel, showing the  
current gain or attenuation setting  
Stores settings in the non-volatile memory upon shut down  
3.1  
Defining the VA-4 Dual Channel Balanced Stereo Audio  
Amplifier  
This section defines the VA-4.  
4
VA-4 - Overview  
 
   
Figure 1: VA-4 Dual Channel Balanced Stereo Audio Amplifier Front Panel  
#
Feature  
Function  
1
POWER Switch  
- Button  
Illuminated switch supplying power to the unit  
Press to decrease the level  
2
3
4
5
6
7
+ Button  
Press to increase the level  
LEVEL 7-segment LED Display  
SELECT Button  
Channel 1 LED  
Channel 2 LED  
Shows the gain of the selected channel (in decibels)  
Selects the stereo channel (1 or 2) being controlled using the + button and the - button  
Illuminates when channel 1 is chosen via the SELECT button  
Illuminates when channel 2 is chosen via the SELECT button  
VA-4 - Overview  
5
 
 
Figure 2: VA-4 Dual Channel Balanced Stereo Audio Amplifier Rear Panel  
#
Feature  
Function  
8
CH.1 IN LEFT and RIGHT XLR Female Connectors  
CH.2 IN LEFT and RIGHT XLR Female Connectors  
CH.1 OUT LEFT and RIGHT XLR Male Connectors  
CH.2 OUT LEFT and RIGHT XLR Male Connectors  
RS-232 9-pin D-sub Port  
Connects to the balanced stereo audio source 1  
Connects to the balanced stereo audio source 2  
Connects to the balanced stereo audio acceptor 1  
Connects to the balanced stereo audio acceptor 2  
Connects to the PC or the Remote Controller  
AC connector enabling power supply to the unit  
9
10  
11  
12  
13  
Power Connector with FUSE  
6
VA-4 - Overview  
 
 
4
Connecting the VA-4  
Always switch off the power to each device before connecting it to your  
VA-4. After connecting your VA-4, connect its power and then switch  
i
on the power to each device.  
To connect the VA-4 as illustrated in the example in Figure 3:  
1. Connect a balanced stereo audio source (for example, a set top box: source  
1) to the left and right channel 1 IN XLR connectors.  
2. Connect a balanced stereo audio source (Source 2) to the left and right  
channel 2 IN XLR connectors.  
3. Connect the left and right channel 1 OUT XLR connectors to a balanced  
stereo audio acceptor (Acceptor 1).  
4. Connect the left and right channel 2 OUT XLR connectors to a balanced  
stereo audio acceptor (Acceptor 2).  
5. Connect a PC (or other control device) to the RS-232 9-pn D-sub port, if  
control via RS-232 is required (see Section 4.1).  
6. Connect the power cord to the mains electricity (not shown in Figure 3).  
7. Select the stereo channel (1 or 2) by pressing the SELECT button, and set  
the level using the + and – buttons (as required).  
VA-4 - Connecting the VA-4  
7
 
 
Figure 3: Connecting the VA-4 Dual Channel Balanced Stereo Audio Amplifier  
4.1  
Connecting to the VA-4 via RS-232  
You can connect to the unit via a crossed RS-232 connection, using for example,  
a PC. A crossed cable or null-modem is required as shown in method A and B  
respectively. If a shielded cable is used, connect the shield to pin 5.  
Method A (Figure 4)—Connect the RS-232 9-pin D-sub port on the unit via a  
crossed cable (only pin 2 to pin 3, pin 3 to pin 2, and pin 5 to pin 5 need be  
connected) to the RS-232 9-pin D-sub port on the PC.  
Note: There is no need to connect any other pins.  
8
VA-4 - Connecting the VA-4  
 
   
5
4
3
2
1
5
4
3
2
1
9
8
7
6
9
8
7
6
PC  
Figure 4: Crossed Cable RS-232 Connection  
Hardware flow control is not required for this unit. In the rare case where a  
controller requires hardware flow control, short pin 1 to 7 and 8, and pin 4 to 6 on  
the controller side.  
Method B (Figure 5)—Connect the RS-232 9-pin D-sub port on the unit via a  
straight (flat) cable to the null-modem adapter, and connect the null-modem  
adapter to the RS-232 9-pin D-sub port on the PC. The straight cable usually  
contains all nine wires for a full connection of the D-sub connector. Because the  
null-modem adapter (which already includes the flow control jumpering described  
in Method A above) only requires pins 2, 3 and 5 to be connected, you are free to  
decide whether to connect only these 3 pins or all 9 pins.  
5
9
4
8
Null-Modem  
Adapter  
3
to PC  
7
2
6
1
Figure 5: Straight Cable RS-232 Connection with a Null Modem Adapter  
VA-4 - Connecting the VA-4  
9
 
   
5
Technical Specifications  
INPUTS:  
2 balanced stereo, up to 16dBm/33kon female XLR  
connectors  
OUTPUTS:  
2 balanced stereo, up to 21dBm/50on male XLR  
connectors  
BANDWIDTH (-3dB):  
S/N RATIO:  
>100 kHz  
80dB@6dB Gain (unweighted)  
74dB@1kHz; -68dB@20kHz  
CROSSTALK (all hostile):  
CONTROLS:  
Level Control and Channel Selection, Impedance  
selection  
COUPLING:  
AC at output  
AUDIO THD + NOISE:  
AUDIO 2nd HARMONIC:  
OPERATING TEMPERATURE:  
STORAGE TEMPERATURE:  
HUMIDITY:  
0.02%@1kHz  
0.008%@1kHz  
0° to +40°C (32° to 104°F)  
-40° to +70°C (-40° to 158°F)  
10% to 90%, RHL non-condensing  
19” x 7” x 1U (W, D, H)  
2.5 kg. (5.5 lbs.) approx.  
DIMENSIONS:  
WEIGHT:  
ACCESSORIES:  
Power cord, Null modem adapter, Windows®-based  
control software  
OPTIONS:  
Specifications are subject to change without notice at http://www.kramerelectronics.com  
10  
VA-4 - Technical Specifications  
 
 
6
Protocol 2000  
The VA-4 is compatible with Kramer’s Protocol 2000 (version 0.51). This RS-232 /  
RS-485 communication protocol uses four bytes of information as defined below.  
For RS-232, a null-modem connection between the machine and controller is  
used. The default data rate is 9600 baud, with no parity, 8 data bits and 1 stop bit.  
The first table below lists the VA-4 Hex codes for gain control (attenuation), and  
the second table below lists the VA-4 Hex codes for gain control (amplification). In  
addition, the following commands are also valid:  
1. To increment the gain of channel 1 (in steps of 1), send hex bytes 18 81 80  
81. To decrement the gain of channel 1 (in steps of 1), send hex bytes 18 81  
81 81.  
2. To increment the gain of channel 2 (in steps of 1), send hex bytes 18 82 80  
81. To decrement the gain of channel 2 (in steps of 1), send hex bytes 18 82  
81 81.  
3. To request the gain of channel 1, send hex codes 19 81 80 81. The  
response is as per the following tables, except that 59 is sent instead of the  
constant byte 16; and 7f instead of the constant byte 3f.  
4. To request the gain of channel 2, send hex codes 19 82 80 81.  
In the tables below:  
The dB column shows the machine’s gain value at the setting shown in the  
LED column. The VA-4 has a gain resolution of 0.245dB (each step is  
0.245dB)  
Hex codes are shown for channel # 1. For channel # 2, for 4 byte strings  
change the 2nd byte from 81 to 82, and for 8 byte strings, change the 6th  
byte from 81 to 82.  
For example, for gain with the LED showing –166 for channel 2, send 16 82  
80 81; for the LED showing 26, send 3f 80 81 81 16 82 c0 81  
VA-4 - Protocol 2000  
11  
 
 
VA-4 Hex Codes for Gain Control (Attenuation)  
Gain (dB) LED  
Hex Codes  
Gain (dB) LED  
Hex Codes  
Gain (dB) LED Hex Codes  
-40.7  
-40.4  
-40.2  
-39.9  
-39.7  
-39.4  
-39.2  
-39.0  
-38.7  
-38.7  
-38.2  
-38.0  
-37.7  
-37.5  
-37.2  
-37.0  
-36.8  
-36.5  
-36.3  
-36.0  
-35.8  
-35.5  
-35.3  
-35.0  
-34.8  
-34.5  
-34.3  
-34.1  
-33.8  
-33.6  
-33.3  
-33.1  
-32.8  
-32.6  
-32.3  
-32.1  
-31.9  
-31.6  
-31.4  
-31.1  
-30.9  
-30.6  
-30.4  
-30.1  
-29.9  
-29.6  
-29.4  
-29.2  
-28.9  
-28.7  
-28.4  
-28.2  
-27.9  
-27.7  
-27.4  
-27.2  
-166  
-165  
-164  
-163  
-162  
-161  
-160  
-159  
-158  
-157  
-156  
-155  
-154  
-153  
-152  
-151  
-150  
-149  
-148  
-147  
-146  
-145  
-144  
-143  
-142  
-141  
-140  
-139  
-138  
-137  
-136  
-135  
-134  
-133  
-132  
-131  
-130  
-129  
-128  
-127  
-126  
-125  
-124  
-123  
-122  
-121  
-120  
-119  
-118  
-117  
-116  
-115  
-114  
-113  
-112  
-111  
16 81 80 81  
-27.0  
-26.7  
-26.5  
-26.2  
-26.0  
-25.7  
-25.5  
-25.2  
-25.0  
-24.7  
-24.5  
-24.3  
-24.0  
-23.8  
-23.5  
-23.3  
-23.0  
-22.8  
-22.5  
-22.3  
-22.1  
-21.8  
-21.6  
-21.3  
-21.1  
-20.8  
-20.6  
-20.3  
-20.1  
-19.8  
-19.6  
-19.4  
-19.1  
-18.9  
-18.6  
-18.4  
-18.1  
-17.9  
-17.6  
-17.4  
-17.2  
-16.9  
-16.7  
-16.4  
-16.2  
-15.9  
-15.7  
-15.4  
-15.2  
-14.9  
-14.7  
-14.5  
-14.2  
-14.0  
-13.7  
-13.5  
-110  
-109  
-108  
-107  
-106  
-105  
-104  
-103  
-102  
-101  
-100  
-99  
-98  
-97  
-96  
-95  
-94  
-93  
-92  
-91  
-90  
-89  
-88  
-87  
-86  
-85  
-84  
-83  
-82  
-81  
-80  
-79  
-78  
-77  
-76  
-75  
-74  
-73  
-72  
-71  
-70  
-69  
-68  
-67  
-66  
-65  
-64  
-63  
-62  
-61  
-60  
-59  
-58  
-57  
-56  
-55  
16 81 b8 81  
-13.2  
-13.0  
-12.7  
-12.5  
-12.3  
-12.0  
-11.8  
-11.5  
-11.3  
-11.0  
-10.8  
-10.5  
-10.3  
-10.0  
-9.8  
-9.6  
-9.3  
-9.1  
-8.8  
-8.6  
-8.3  
-8.1  
-7.8  
-7.6  
-7.4  
-7.1  
-6.9  
-6.6  
-6.4  
-6.1  
-5.9  
-5.6  
-5.4  
-5.1  
-4.9  
-4.7  
-4.4  
-4.2  
-3.9  
-3.7  
-7.4  
-7.1  
-3.4  
-3.2  
-2.9  
-2.7  
-2.5  
-2.2  
-2.0  
-1.7  
-1.5  
-1.2  
-1.0  
-0.7  
-0.5  
-0.2  
-54  
-53  
-52  
-51  
-50  
-49  
-48  
-47  
-46  
-45  
-44  
-43  
-42  
-41  
-40  
-39  
-38  
-37  
-36  
-35  
-34  
-33  
-32  
-31  
-30  
-29  
-28  
-27  
-26  
-25  
-24  
-23  
-22  
-21  
-20  
-19  
-18  
-17  
-16  
-15  
-30  
-29  
-14  
-13  
-12  
-11  
-10  
-9  
16 81 f0 81  
16 81 81 81  
16 81 82 81  
16 81 83 81  
16 81 84 81  
16 81 85 81  
16 81 86 81  
16 81 87 81  
16 81 88 81  
16 81 89 81  
16 81 8a 81  
16 81 8b 81  
16 81 8c 81  
16 81 8d 81  
16 81 8e 81  
16 81 8f 81  
16 81 90 81  
16 81 91 81  
16 81 92 81  
16 81 93 81  
16 81 94 81  
16 81 95 81  
16 81 96 81  
16 81 97 81  
16 81 98 81  
16 81 99 81  
16 81 9a 81  
16 81 9b 81  
16 81 9c 81  
16 81 9d 81  
16 81 9e 81  
16 81 9f 81  
16 81 a0 81  
16 81 a1 81  
16 81 a2 81  
16 81 a3 81  
16 81 a4 81  
16 81 a5 81  
16 81 a6 81  
16 81 a7 81  
16 81 a8 81  
16 81 a9 81  
16 81 aa 81  
16 81 ab 81  
16 81 ac 81  
16 81 ad 81  
16 81 ae 81  
16 81 af 81  
16 81 b0 81  
16 81 b1 81  
16 81 b2 81  
16 81 b3 81  
16 81 b4 81  
16 81 b5 81  
16 81 b6 81  
16 81 b7 81  
16 81 b9 81  
16 81 ba 81  
16 81 bb 81  
16 81 bc 81  
16 81 bd 81  
16 81 be 81  
16 81 bf 81  
16 81 c0 81  
16 81 c1 81  
16 81 c2 81  
16 81 c3 81  
16 81 c4 81  
16 81 c5 81  
16 81 c6 81  
16 81 c7 81  
16 81 c8 81  
16 81 c9 81  
16 81 ca 81  
16 81 cb 81  
16 81 cc 81  
16 81 cd 81  
16 81 ce 81  
16 81 cf 81  
16 81 d0 81  
16 81 d1 81  
16 81 d2 81  
16 81 d3 81  
16 81 d4 81  
16 81 d5 81  
16 81 d6 81  
16 81 d7 81  
16 81 d8 81  
16 81 d9 81  
16 81 da 81  
16 81 db 81  
16 81 dc 81  
16 81 dd 81  
16 81 de 81  
16 81 df 81  
16 81 e0 81  
16 81 e1 81  
16 81 e2 81  
16 81 e3 81  
16 81 e4 81  
16 81 e5 81  
16 81 e6 81  
16 81 e7 81  
16 81 e8 81  
16 81 e9 81  
16 81 ea 81  
16 81 eb 81  
16 81 ec 81  
16 81 ed 81  
16 81 ee 81  
16 81 ef 81  
16 81 f1 81  
16 81 f2 81  
16 81 f3 81  
16 81 f4 81  
16 81 f5 81  
16 81 f6 81  
16 81 f7 81  
16 81 f8 81  
16 81 f9 81  
16 81 fa 81  
16 81 fb 81  
16 81 fc 81  
16 81 fd 81  
16 81 fe 81  
16 81 ff 81  
3f 80 81 81 16 81 80 81  
3f 80 81 81 16 81 81 81  
3f 80 81 81 16 81 82 81  
3f 80 81 81 16 81 83 81  
3f 80 81 81 16 81 84 81  
3f 80 81 81 16 81 85 81  
3f 80 81 81 16 81 86 81  
3f 80 81 81 16 81 87 81  
3f 80 81 81 16 81 88 81  
3f 80 81 81 16 81 89 81  
3f 80 81 81 16 81 8a 81  
3f 80 81 81 16 81 8b 81  
3f 80 81 81 16 81 8c 81  
3f 80 81 81 16 81 8d 81  
3f 80 81 81 16 81 8e 81  
3f 80 81 81 16 81 8f 81  
3f 80 81 81 16 81 90 81  
3f 80 81 81 16 81 91 81  
3f 80 81 81 16 81 92 81  
3f 80 81 81 16 81 93 81  
3f 80 81 81 16 81 94 81  
3f 80 81 81 16 81 95 81  
3f 80 81 81 16 81 96 81  
3f 80 81 81 16 81 97 81  
3f 80 81 81 16 81 88 81  
3f 80 81 81 16 81 89 81  
3f 80 81 81 16 81 98 81  
3f 80 81 81 16 81 99 81  
3f 80 81 81 16 81 9a 81  
3f 80 81 81 16 81 9b 81  
3f 80 81 81 16 81 9c 81  
3f 80 81 81 16 81 9d 81  
3f 80 81 81 16 81 9e 81  
3f 80 81 81 16 81 9f 81  
3f 80 81 81 16 81 a0 81  
3f 80 81 81 16 81 a1 81  
3f 80 81 81 16 81 a2 81  
3f 80 81 81 16 81 a3 81  
3f 80 81 81 16 81 a4 81  
3f 80 81 81 16 81 a5 81  
-8  
-7  
-6  
-5  
-4  
-3  
-2  
-1  
12  
VA-4 - Protocol 2000  
 
VA-4 Hex Codes for Gain Control (Amplification)  
Gain (dB)  
LED Hex Codes  
Gain (dB) LED Hex Codes  
0
0
3f 80 81 81 16 81 a6 81  
3f 80 81 81 16 81 a7 81  
3f 80 81 81 16 81 a8 81  
3f 80 81 81 16 81 a9 81  
3f 80 81 81 16 81 aa 81  
3f 80 81 81 16 81 ab 81  
3f 80 81 81 16 81 ac 81  
3f 80 81 81 16 81 ad 81  
3f 80 81 81 16 81 ae 81  
3f 80 81 81 16 81 af 81  
3f 80 81 81 16 81 b0 81  
3f 80 81 81 16 81 b1 81  
3f 80 81 81 16 81 b2 81  
3f 80 81 81 16 81 b3 81  
3f 80 81 81 16 81 b4 81  
3f 80 81 81 16 81 b5 81  
3f 80 81 81 16 81 b6 81  
3f 80 81 81 16 81 b7 81  
3f 80 81 81 16 81 b8 81  
3f 80 81 81 16 81 b9 81  
3f 80 81 81 16 81 ba 81  
3f 80 81 81 16 81 bb 81  
3f 80 81 81 16 81 bc 81  
3f 80 81 81 16 81 bd 81  
3f 80 81 81 16 81 be 81  
3f 80 81 81 16 81 bf 81  
3f 80 81 81 16 81 c0 81  
3f 80 81 81 16 81 c1 81  
3f 80 81 81 16 81 c2 81  
3f 80 81 81 16 81 c3 81  
3f 80 81 81 16 81 c4 81  
3f 80 81 81 16 81 c5 81  
3f 80 81 81 16 81 c6 81  
3f 80 81 81 16 81 c7 81  
3f 80 81 81 16 81 c8 81  
3f 80 81 81 16 81 c9 81  
3f 80 81 81 16 81 ca 81  
3f 80 81 81 16 81 cb 81  
3f 80 81 81 16 81 cc 81  
3f 80 81 81 16 81 cd 81  
3f 80 81 81 16 81 ce 81  
3f 80 81 81 16 81 cf 81  
3f 80 81 81 16 81 d0 81  
3f 80 81 81 16 81 d1 81  
3f 80 81 81 16 81 d2 81  
+11.0  
+11.3  
+11.5  
+11.8  
+12.0  
+12.3  
+12.5  
+12.7  
+13.0  
+13.2  
+13.5  
+13.7  
+14.0  
+14.2  
+14.5  
+14.7  
+14.9  
+15.2  
+15.4  
+15.7  
+15.9  
+16.2  
+16.4  
+16.7  
+16.9  
+17.2  
+17.4  
+17.6  
+17.9  
+18.1  
+18.4  
+18.6  
+18.9  
+19.1  
+19.4  
+19.6  
+19.8  
+20.1  
+20.3  
+20.6  
+20.8  
+21.1  
+21.3  
+21.6  
+21.8  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
71  
72  
73  
74  
75  
76  
77  
78  
79  
80  
81  
82  
83  
84  
85  
86  
87  
88  
89  
3f 80 81 81 16 81 d3 81  
3f 80 81 81 16 81 d4 81  
3f 80 81 81 16 81 d5 81  
3f 80 81 81 16 81 d6 81  
3f 80 81 81 16 81 d7 81  
3f 80 81 81 16 81 d8 81  
3f 80 81 81 16 81 d9 81  
3f 80 81 81 16 81 da 81  
3f 80 81 81 16 81 db 81  
3f 80 81 81 16 81 dc 81  
3f 80 81 81 16 81 dd 81  
3f 80 81 81 16 81 de 81  
3f 80 81 81 16 81 df 81  
3f 80 81 81 16 81 e0 81  
3f 80 81 81 16 81 e1 81  
3f 80 81 81 16 81 e2 81  
3f 80 81 81 16 81 e3 81  
3f 80 81 81 16 81 e4 81  
3f 80 81 81 16 81 e5 81  
3f 80 81 81 16 81 e6 81  
3f 80 81 81 16 81 e7 81  
3f 80 81 81 16 81 e8 81  
3f 80 81 81 16 81 e9 81  
3f 80 81 81 16 81 ea 81  
3f 80 81 81 16 81 eb 81  
3f 80 81 81 16 81 ec 81  
3f 80 81 81 16 81 ed 81  
3f 80 81 81 16 81 ee 81  
3f 80 81 81 16 81 ef 81  
3f 80 81 81 16 81 f0 81  
3f 80 81 81 16 81 f1 81  
3f 80 81 81 16 81 f2 81  
3f 80 81 81 16 81 f3 81  
3f 80 81 81 16 81 f4 81  
3f 80 81 81 16 81 f5 81  
3f 80 81 81 16 81 f6 81  
3f 80 81 81 16 81 f7 81  
3f 80 81 81 16 81 f8 81  
3f 80 81 81 16 81 f9 81  
3f 80 81 81 16 81 fa 81  
3f 80 81 81 16 81 fb 81  
3f 80 81 81 16 81 fc 81  
3f 80 81 81 16 81 fd 81  
3f 80 81 81 16 81 fe 81  
3f 80 81 81 16 81 ff 81  
+0.2  
+0.5  
+0.7  
+1.0  
+1.2  
+1.5  
+1.7  
+2.0  
+2.2  
+2.5  
+2.7  
+2.9  
+3.2  
+3.4  
+3.7  
+3.9  
+4.2  
+4.4  
+4.7  
+4.9  
+5.1  
+5.4  
+5.6  
+5.9  
+6.1  
+6.4  
+6.6  
+6.9  
+7.1  
+7.4  
+7.6  
+7.8  
+8.1  
+8.3  
+8.6  
+8.8  
+9.1  
+9.3  
+9.6  
+9.8  
+10.0  
+10.3  
+10.5  
+10.8  
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8
9
10  
11  
12  
13  
14  
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30  
31  
32  
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34  
35  
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38  
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41  
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43  
44  
VA-4 - Protocol 2000  
13  
 
14  
VA-4 - Protocol 2000  
 
For the latest information on our products and a list of Kramer distributors,  
visit our Web site 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 and servicing  
!
P/N:  
Rev:  
2A  
2900-000004  
 

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