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KRAMER ELECTRONICS LTD. 

INTRODUCTION 

Congratulations on your purchase of this Kramer Electronics SDI Switcher/Matrix. Since 1981, Kramer has 
been dedicated to the development and manufacture of high quality video/audio equipment. The Kramer line 
has become an integral part of many of the best production and presentation facilities around the world. In 
recent years, Kramer has redesigned and upgraded most of the line, making the best even better. Kramer’s line 
of professional video/audio electronics is one of the most versatile and complete available, and is a true leader in 
terms of quality, workmanship, price/performance ratio and innovation. In addition to the Kramer line of high 
quality switchers, such as the one you have just purchased, Kramer also offers a full line of high quality 
distributors, processors, interfaces, controllers and computer-related products.  
This manual includes configuration, operation and option information for the following products from the 
Kramer line of SDI Switchers and Matrices. All of them are similar in operation and features. 

 

 

 

 

SD-7308 – 8x1 SDI Switcher 

 

 

 

 

SD-7388 – 8x8 SDI Matrix 

 

 

 

 

SD-7316 – 16x16 SDI Matrix 

1.1 

A Word on Video Switchers and Matrices  

A video switcher usually switches between several sources (inputs) and one or more acceptors (outputs). A 
switcher that allows several inputs to be connected to several outputs simultaneously is called a Matrix 
Switcher. Switchers may be of the electronic or mechanical type. Most matrices are of the active electronic type, 
with many crosspoints. Vertical interval switching, frequently used in video, ensures that the transition from one 
video source to another (such as switching between two genlocked cameras) is smooth and without interference. 
The switching and changeover is done during the blanked vertical interval period, when the transition is hidden 
from the eyes. Vertical interval switching is needed when recording or transmitting a video program involving 
several video sources, as in live broadcast, to ensure clean, undisturbed picture transitions. The switched sources 
should be genlocked. Some matrices have a special, additional input – a genlock input, which is used to genlock 
the matrix to an external genlock or a studio master reference. Digital (SDI) matrices usually have an analog 
genlock input, while very few of them offer an additional digital genlock input. Matrices and switchers may 
sometimes be RS-232 or RS-485/422 controlled. Each of these options is a way of remotely controlling a 
video/audio device (switcher etc.) using a PC with a serial port, or another device that uses a similar 
communication protocol. The simplest connection between the RS-232 controller and the controlled device uses 
two wires (TRANSMIT, RECEIVE) and a common ground wire. 
 

1.2 

Digital and Analog video signals  

An 

analog

 signal varies continuously. It may have any value (within its physical bounds) and can change at 

any instant. A 

digital

 signal is made up of a finite number of discrete levels, usually – but not always – 

changing only at discrete time periods. An example of a digitized waveform is shown below. 

 

ANALOG SIGNAL

DIGITAL SIGNAL

Summary of Contents for SD-7308

Page 1: ...CTRONICS LTD P N 2900 006001 KRAMER ELECTRONICS Ltd USER MANUAL Kramer SDI Switchers and Matrices Models SD 7308 SD 7388 SD 7316 IMPORTANT Before proceeding please read paragraph entitled Unpacking an...

Page 2: ...ion Protocol for SD 7308 11 7 4 DIP Switch Settings for the SD 7308 11 8 OPERATION OF THE SD 7388 AND SD 7316 12 8 1 Menu Commands for the SD 7388 and SD 7316 12 8 2 Communication Protocol for the SD...

Page 3: ...pe Most matrices are of the active electronic type with many crosspoints Vertical interval switching frequently used in video ensures that the transition from one video source to another such as switc...

Page 4: ...s length the signal is destroyed This phenomenon is known as the cliff effect To avoid the crash at the cliff an equalizer and reclocker should be inserted at a distance less than the cliff length Fro...

Page 5: ...the near future for full digital HDTV 1 5 Factors Affecting Quality of Results There are many factors affecting the quality of results when signals are transmitted from a source to an acceptor Connect...

Page 6: ...4fsc PAL 270Mb s 4 2 2 Component 360Mb s 4 2 2 Widescreen 143Mb s 4fsc NTSC 177Mb s 4fsc PAL 270Mb s 4 2 2 Component 360Mb s 4 2 2 Widescreen 143Mb s 4fsc NTSC 177Mb s 4fsc PAL 270Mb s 4 2 2 Component...

Page 7: ...dicate the detected standard 4fsc PAL 4fsc NTSC Component 4 2 2 and high definition 16 9 wide screen standards are all recognized The user may adjust the serial video output level The CARRIER LED indi...

Page 8: ...vided to optimize signal level The input select function of the SD 7308 can be controlled by front panel buttons and by RS 232 commands transmitted by a touch screen control system personal computer o...

Page 9: ...ecognizing word length Panel features of the SD 7388 are described in Figure 4 and Table 2 Note For operation instructions refer to section 7 2 Figure 4 SD 7388 Front Rear Panel Features Table 2 SD 73...

Page 10: ...tically recognizing word length Panel features of the SD 7316 are described in Figure 5 and Table 3 Note For operation instructions refer to section 7 2 Figure 5 SD 7316 Front Rear Panel Features Tabl...

Page 11: ...o not attempt to connect or disconnect any video signal while it is on 2 The socket outlet should be near the equipment and should be easily accessible To fully disconnect equipment remove the power s...

Page 12: ...he code N3N2N1N0 1011 if not locked N3N2N1N0 1010 When data is sent to the switcher in order to change its status i e to route a new input to the output the machine replies by returning that same byte...

Page 13: ...cleared in this case Clear ALL Outputs YES enter NEXT menu To clear all the outputs press the ENTER button This command disconnects all the In to Out connections To proceed to the next menu function p...

Page 14: ...T menu Using the option board this option allows the user to specify one of the router s outputs as the time reference Note The SDI signal for Digital SYNC Internal is taken from an Output of the unit...

Page 15: ...to turn the machine off and then on again 8 2 COMMUNICATION PROTOCOL FOR THE SD 7388 SD 7316 PROTOCOL 2000 This RS 232 RS 485 communication protocol uses four bytes of information as defined below Fo...

Page 16: ...s switched For other operations these bits are defined according to the table 4th BYTE Bit 7 Defined as 1 Bit 6 bit 5 Defined as 0 M4 M0 MACHINE NUMBER Used to address machines in a system via their m...

Page 17: ...uest if machine has this function 0 for video 1 for audio 3 4 6 13 SET HIGHEST MACHINE NUMBER 0 for video 1 for audio Set equal to highest machine number 2 14 REQUEST HIGHEST MACHINE NUMBER for video...

Page 18: ...etting SETUP 1 to SETUP 15 are the settings saved in the switcher s memory i e those used for Store and Recall NOTE 4 The reply to a REQUEST instruction is as follows the same instruction and INPUT co...

Page 19: ...ge is made The power down save auto save may be disabled using this code Note that whenever the machine is turned on the auto save function is set NOTE 13 This is a request to identify the switcher s...

Page 20: ...3 81 01 88 84 81 01 88 85 81 01 88 86 81 01 88 87 81 01 88 88 81 01 88 89 81 01 88 8A 81 01 88 8B 81 01 88 8C 81 01 88 8D 81 01 88 8E 81 01 88 8F 81 01 88 90 81 IN 9 01 89 81 81 01 89 82 81 01 89 83 8...

Page 21: ...20 KRAMER ELECTRONICS LTD Figure 4 RS 232 Null Modem Connection...

Page 22: ...icators Problem Remedy No Power 1 Confirm that the rocker switch is in the ON position and that the switch is illuminated 2 Confirm that power connections are secured at the machine and at the recepta...

Page 23: ...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...

Page 24: ...Some countries may not allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of incidental or consequential damages so the above limitations and exclu...

Page 25: ...l 972 2 654 4000 Fax 972 2 653 5369 e mail kramerel netvision net il The list of Kramer distributors appears on our web site www kramerelectronics com From the web site it is also possible to e mail f...

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