T460R control of a Kramer VP-773/4
Contents
1. JED Microprocessors Pty Ltd2. sent in with data as strings as macros in a program like Docklight See http www docklight de Load the strings then send using a key click The T460R replies to each command as a check of the load ASCII data can be sent in as text and binary data such as the leading length specifier can be sent in as two hex digits between lt and gt characters Data format for Docklight etc is 38400 baud 8N1 Function Byte or string needed Macros for Docklight Baud rate 9600 04Fh to OEh B lt 0E gt See table in PartA Power tog string String into 070h lt 09 gt Y 0 38 0 lt 0D gt S070 lt 09 gt Y 0 38 0 lt 0D gt Power test string String into OFOh lt 08 gt Y 1 631 lt 0D gt SOF0 lt 08 gt Y 1 631 lt 0D gt Test string finds current pwr state Pwr test threshold Char count number into OBFh lt 00A gt SOBF lt 0A gt Value for test Config after w up String into 1COh lt 00 gt 1C0 lt 00 gt Not used so clear Ch1 PC 1 String into 140h lt OB gt Y 0 120 11 lt 0D gt S140 lt 0B gt Y 0 120 11 lt 0D gt Ch2PC2 String into 150h lt OB gt Y 0 120 12 lt 0D gt S150 lt 0B gt Y 0 120 12 lt 0D gt Ch 3 Comp Vid String into 160h lt 0A gt Y 0 120 9 lt 0D gt 160 lt 0A gt Y 0 120 9 lt 0D gt Ch 4 DisplayPort String into 170h lt OB gt Y 0 120 16 lt 0D gt S170 lt 0B gt Y 0 120 16 lt 0D gt Ch 5 HDMI 1 String into 180h lt OB gt Y 0 120 13 lt 0D gt
3. A as JED MICROPROCESSORS PTY LTD E D 173 Boronia Rd Boronia PO Box 30 Victoria 3155 Australia Phone 61 3 9762 3588 Fax 61 3 9762 5499 http www jedmicro com au email jed jedmicro com au T460R control of a Kramer VP 773 4 via SER1 RS232 Ed Schoell 25 Nov 2014 Introduction The Kramer VP 773 4 is a powerful switch scaler which can be controlled via the second serial port on a T460 using strings manually entered into the T460R s non volatile memory These strings are sent at key points of the T460R On and Off cycle and enable its integration into a room control system completely transparently to the user The user just uses the On source Off and Volume Up Down keys as normal but the source switching and volume control takes place in the VP 773 4 instead of in the projector As per other switcher based systems the projector should be told using the T460R s mapping function to stay on an HDMI channel for all T460R channels all the switching then takes place in the VP 773 4 All audio and video signals are routed to the switcher and audio volume control then happens in the VP 773 4 as well The T460R serial 0 controls the projector at whatever baud rate the projector needs and serial 1 controls the switcher at 9600 8N1 Note To enable the volume range 80 to 20 T460R version 3 73 or later is needed VP 773 4 pre setup The protocol needs to be set in the Kramer VP 773 4 Miscellaneous menu last one under P
4. S180 lt 0B gt Y 0 120 13 lt 0D gt Ch 6 HDMI 2 String into 190h lt OB gt Y 0 120 14 lt 0D gt _ S190 lt 0B gt Y 0 120 14 lt 0D gt Ch 7 HDMI 3 String into 1A0h lt 0B gt Y 0 120 10 lt 0D gt S1A0 lt 0B gt Y 0 120 10 lt 0D gt Ch 8 HDMI 4 String into 1B0h lt OB gt Y 0 120 15 lt 0D gt _ S1B0 lt 0B gt Y 0 120 15 lt 0D gt Channel settings for T460R channels Vol setup bytes OCCh Vol format 80h set variable length decimal with sign in place OCDh Volume increment set to 4 OCEh Max T460R vol set to 25 19h OCFh Volume offset set to 80 BOh SOCC lt 80 gt lt 04 gt lt 19 gt lt B0 gt Volume string ODOh lt 08 gt Y 0 212 as lead in lt 01 gt lt 0D gt sets CR as term This sets Y 0 212 80 lt CR gt to Y 0 212 20 lt CR gt in 25 steps S0D0 lt 08 gt Y 0 212 lt 01 gt lt 0D gt note space after 212 Audio mute On String into 1E0h lt 0A gt Y 0 743 1 lt 0D gt S1E0 lt 0A gt Y 0 743 1 lt 0D gt Audio mute Off String into 1E0h lt 0A gt Y 0 743 0 lt 0D gt S1F0 lt 0A gt Y 0 743 0 lt 0D gt Needs FlagC 1 Note When the two volume keys are pressed together to action Picture and sound mute the projector is blanked via SERO RS232 and the sound is muted by a command via SER1 RS232 Note The VP 774 has an SDI input The string to make this e g Ch 4 is S170 lt OB gt Y 0 120 17 lt 0D gt T460R control of Kramer VP 773 774 Manual 25 Nov 2014 Part A
5. r command is listed on page 69 of the VP 773 4 manual where a special set of commands is listed which mimic the remote control and front panel buttons This provides is only a toggle command for power On Off as most LCD and projector IR remotes also have I e One push for On another press for Off JED is discussion with Kramer in Israel and they may add discrete power commands to a future software update to the VP 773 4 Interestingly previous Kramer switchers like the 725 and 728 had such commands In the mean time the following code addition does work reliably but with a little more complexity to set up The unit does NOT even have a power state test that allows the state to be read directly Rev 3 73 of the T460R software now includes a facility to test the power state of the VP 773 4 by sending a read data request to the unit and detecting the length of the reply All commands including data requests are echoed even in the power off state so it is not just a matter of determining if there is or is not a reply rather if the unit is on the answer is appended to the echo To work with this behaviour a threshold is set longer than the echo but less than the sum of echo plus answer This threshold is T460R control of Kramer VP 773 774 Manual 25 Nov 2014 Part A JED Microprocessors Pty Ltd 1 set into location OBFh If this location is set to OOh default it is assumed that there are discrete Power On strings set into 070h
6. rotocol to Legacy This will need to be done by connecting the unit to a display device via an HDMI cable from the output and then using the IR remote turn on power and press the Menu key and observe the on screen setup screen Select the Misc item then Protocol then Protocol then Legacy This sets the communications to 9600 baud ASCII RS232 The volume control in the VP 773 4 controls the Output setting there is a separate setting for Input volume which the T460R does not adjust It may be necessary to set this up manually to a suitable level using the second audio setting The Input level comes set at a default of Odb In the same way output resolution etc needs to be set up All these constants are saved in the VP 773 4 non volatile memory The VP 773 4 takes 40 seconds or so to become fully operational after power up so the projector warm up time should be set to at least 45 seconds if it was not already at this value because of projector warmup settings Use the 5 menu to set this The VP 773 4 manual is available from http www kramerus com downloads manuals vp 773 pdf The only difference between the VP 773 and the VP 774 is the addition of SDI input and output on the VP 774 SDI appears in the list of input command selectable parameters VP 773 4 Toggle power problem Unfortunately these units do NOT have discrete Power On and Power Off commands Rather the only powe
7. up and Power Off strings set into OFOh up To use this test system the Toggle Power command is loaded in the normal format into 070h up in the VP 773 4 Y 0 38 0 lt CR gt see following table for macro and the data request command is put into OFOh up Y 1 631 lt CR gt actually Get Output Format If power is actually On this is replied to after the echo If power is Off it just echoes the command with no data A value of 0Ah into OBFh activates the test mode and differentiates between reply lengths T460R non volatile memory setup for second serial port There are a series of locations in the T460R memory allocated for Ser1 port control There are locations for Power On Off eight Source Select strings a Volume Control pre and post strings mute blank strings and discrete locations for baud rate setting and volume control constants These functions are described in detail in the Part A T460R user manual pages 31 to 34 Strings are stored in 16 byte blocks and to allow strings of any form including ones containing 00h the string length is always specified in binary in the first byte so the actual following maximum string length is 15 bytes The non volatile memory can be loaded in two ways using just the keyboard on the T460R using the EPROM Edit function or using the Serial Edit function entered via a pin number 2000 The commands for this are included in the following The commands S B etc are
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