User Manual and Instructions XAVIEN
Contents
1. CH1 STATUS CH2 STATUS CH3 STATUS and CH4 STATUS can be used as indicators for monitoring selected channel Each line has a series resistor 680 ohm for current limiting You can also connect the anode of an LED directly to each status line for visible indication You can also connect the status lines directly to I O lines of a MCU for system monitoring LOCAL CONTROL When the ENABLE pin of the EXT CTRL input is left OPEN or placed at a LOGIC LEVEL 0 the X QVC EM enters into the LOCAL CONTROL operation When in LOCAL CONTROL there are two modes of operation MANUAL and SCAN e MANUAL Mode MANUAL mode is used to continuously view a specific channel Once X QVC EM powers up and senses MANUAL mode has been selected CH1 is selected by default The unit will keep CH1 selected until the user selects a different channel e SCAN Mode This mode allows the user to sequentially scan through each channel The dwell time for each channel is set by the user in 1s increments 1s MIN to 16s MAX While the unit is scanning the user can select a specific channel the unit will stay on that channel as long as the user has it selected Mounting Installation The X QVC EM comes standard with the following 0 1 2 54mm headers 4x 2 pin 1x 3 pin 1x 8 pin and 1x 5x2 10 pin The headers are NOT soldered to the PCB this allows the user to inst2. xavier X QVC EM XAVIEN Quad Video Controller Engineering Module User Manual and Instructions XAVIEN PO Box 7433 Goodyear Az 85338 www xavien com System Overview The X QVC EM is a low cost 4 channel video multiplexer that was designed to allow the integration and control of up to 4 video sources these include cameras RF video receivers and RF video transmitters The X QVC EM can either scan through each video channel sequentially or can be set to a specific video channel locally buttons switches or RC receiver When the X QVC EM is set to MANUAL mode the user selects the video source by pressing the corresponding button or setting the EXT CTRL bits In SCAN mode the X QVC EM switches between each video channel starting with CH1 for a period of time set by the user 1s to 16s in 1s increments The X QVC EM has an input capacitance of 1pF whether the channel is on or off providing a predictable input impedance to the signal source Input and output ports have all been optimized for 75 ohm but will work with a wide range of inputs The output is capable of driving a 150 ohm load to within 730mV of the 5V power rails DC input voltage can range from 7V to 30V when using the UNREG DC input Camera connections are made using RCA style connectors This unit was designed to be used as a stand alone unit connected to an external contro
3. all other functions except the EXT CTRL AO A1 signals Table 2 shows logic levels needed to control the EXT CTRL functions on the X QVC EM 1 TTL Hi 0 TTL Low X Don t Care Figure 3 shows the pin out of the EXT CTRL connector TABLE 2 EXT CTRL Truth Table ENABLE FIGURE 3 EXT CTRL pin out RC RECEIVER CONTROL JUMPER gt EXT CTRL vous 942 EXT CTRL AG EXT CTRL Al e 45V is used to power the X QVC EM range is from 4 75V to 5 25V DC Figure 4 shows the 5V input connector pin out FIGURE 4 5V input pin out 5 GROUND gt 5 POSITIVE INPUT gt e UN REG input is used to power the X QVC EM range is from 7V to 30V DC Figure 5 shows the UN REG input connector pin out FIGURE 5 UN REG input pin out UN REG GROUND gt UN REG POSITIVE INPUT e MODE SELECT is used to put the X QVC EM in either MANUAL or SCAN mode Figure 6 shows the MODE SELECT connector pin out FIGURE 6 MODE SELECT input pin out t MODE SELECT GROUND MODE SELECT SIGNAL CH4 VIDEO IN is used for video signal input center conductor video signal CH3 VIDEO IN is used for video signal input center conductor video signal CH2 VIDEO IN is used for video signal input center conductor video signal CH1 VIDEO IN is used for video signal i
4. T CTRL A0 gt EXT CTRL Al amp LEDs 54 GROUND gt 54 POSITIVE NPUT gt DWELL TIME UN REG GROUND gt UN REG POSITIVE NPUT gt Control Interface Description e To activate RC RECEIVER CONTROL mode place the included 2 pin jumper across the RC RECEIVER CONTROL connector to get out of this mode remove jumper and turn DC power to unit off Connect the output of your RC receiver to the EXT CTRL connector with the signal yellow or white wire going to the EXT CTRL ENABLE pin Table 1 shows the truth table for using the RC RECEIVER CONTROL mode Video Channel Selected Toms to 1 25ms Ideal 1 1m 10 Ar 1 1 26ms to 1 5ms Ideal 1 4ms 1 51ms to 1 75ms Ideal 1 6ms 1 76ms to 2 0ms Ideal 1 9ms NOTE When the unit is in RC Receiver Control mode and the unit looses RC Signals the X QVC EM stays at the last video channel selected e EXT CTRL with the RC RECEIVER CONTROL jumper removed from unit is used to connect to an external controller for video channel select sets the unit into LOCAL control or REMOTE mode In LOCAL control the system is controlled through the other connections MODE SELECT CHANNEL SELECT and LED DWELL TIME In LOCAL control the unit has two modes of operation depending on the MODE SELECT input MANUAL and SCAN When unit is put into REMOTE mode it ignores
5. all the connectors on the top or bottom of the PCB This also allows the user to place a different style of connector on the board or install wires directly to the PCB All mounting holes are 0 125 in diameter Cf 3 8 o O E O 2 l O LNO ia 090090090090 eee 1 a5 i Oat en L ENIN XAVIEN Ls conn a TOOL sae z a CT ee ee ee a ie ER LEDs ENCODE MODE BUTTONS Handling Precautions These units are sensitive to damage from ESD and should always be handled in a properly grounded environment damage from ESD is not covered under the warranty Product Disclaimer and Limit of Liabilit Since the use and application of this equipment are beyond our control the purchaser or user agrees to hold XAVIEN and their agents from any and all legal claims demands actions debts liabilities judgments costs and attorney fees arising out of claimed on account of or in any manner predicted upon loss or damage to property of or injuries to or death of any and all persons arising out of the use of this equipment Due to the nature of electronic devices the application and environments for these devices the possibility of failure can never be completely ruled out It is the responsibility of the purchaser or user of this equipment to properly test and simulate the actual conditions under which the device is intended to be used to ensure the highest degree of reliability safety and success Product Warranty T
6. he X QVC EM has a warranty of 1 year starting from date of purchase as long as all the guidelines have been followed that are outlined is this document Any improper use or carelessness on the part of user will void the warranty If your unit has problems send an email to RMA XAVIEN COM Once this has been done XAVIEN will send you a return material authorization RMA number that you need to include with your unit DO NOT send any units back to XAVIEN without this RMA number if we receive product with no RMA it will NOT be accepted and mailed back unrepaired Revision History PCB REV 1 00A DATE 07 15 2007 DOC REV 1 00A DATE 07 15 2007 FW REV 1 00A DATE 07 15 2007
7. l system or mounted in a box as an independent system Specifications DC INPUT UNREG DC INPUT 7V to 30V 5V INPUT 4 75V to 5 25V Dimensions 1 25 W x 3 8 L Video I O Connectors RCA Camera Input 1Vp p 75 oh Adjustable Dwell Time 1s to 16s in 1s increments Operational Overview Figure 1 shows the X QVC EM assembly There are 7 connectors used for interfacing to the outside world The 5V input connector should have 5V 4 75V to 5 25V and ground applied to it The UNREG DC input connector can have a DC voltage ranging from 7V to 30V applied since the X QVC EM has an onboard voltage regulator ONLY one of the DC supplies should be used at a time do not attempt to power both connectors with a voltage If you are using the UNREG DC input you can power an external circuit off of the 5V input line as long as your load DOES NOT exceed 50mA FIGURE 1 X QVC EM Assembly i i F J Figure 2 lists all associated connections on the X QVC EM and their functions FIGURE 2 Connections of X QVC EM CH4 VIDEO IN CHe VIDEO IN VIDEO OUTPUT RC RECEIVER CONTROL CH3 VIDEO IN CH1 IN 4 L b LNO 000000000000 09 X QYC EM E i ic CT TUTT KAVIEN tml Gg Www xavien com s n a_i THOT Tay SELECT CH3 SELECT CH2 SELECT CHL SELECT MODE SELECT GROUND MODE SELECT SIGNAL EXT CTRL ENABLE gt EX
8. nput center conductor video signal VIDEO OUTPUT is used for video signal output center conductor video signal CHANNEL SELECT is used to manually select video channels The CHANNEL SELECT interface was designed to allow the user to easily connect momentary switches for selecting a specific channel To select a specific channel the CHx SELECT pin must see a momentary TTL logic low or momentarily short that pin to ground Table 3 shows logic levels needed to control the CHANNEL SELECT functions of the X QVC EM 1 TTL Hi 0 TTL Low X Don t Care Figure 7 shows the pin out of the CHANNEL SELECT connector Pins 2 4 6 and 8 are all tied to GROUND TABLE 3 CHANNEL SELECT Truth table gt m a SELECT CH3 SELECT CHe SELECT CHi SELECT LEDs DWELL TIME is used to connect 4 LEDs and set DWELL TIME The LED indicators can also be used as feedback to an external controller to monitor what channel is selected Figure 8 shows the pin out of the LED DWELL TIME connector Table 4 shows logic levels needed to control the DWELL TIME functions on the X QVC EM 1 TTL Hi O TTL Low X Don t Care Default DWELL TIME is 16s FIGURE 8 LED DWELL SETTING connector pin out LED DWELL TABLE 4 LED DWELL TIME Truth table setting DWELL TIME DWELL TIME 1s DWELL 2s DWELL 4s DWELL 8s DWELL is 1 0 O O
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