Adrienne Electronics AEC-BOX-1 Bedienungsanleitung

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AEC-BOX-1

INSTR CTION MAN AL

ADRIENNE ELECTRONICS

CORPORATION

(Play Speed LTC Reader with RS232/RS422 Outputs)

The serial interface is programmed as follows (change as needed):

Protocol:__________ Op Mode:____________ Address:__________

Baud Rate:_________ # Data Bits:________ Parity:___________

(protocol related)

1 2 3 4 5 6 7 8

Switches = _ _ _ _ _ _ _ _

Third Edition January 1997

7225 Bermuda Road, nit G * Las Vegas, NV 89119 * .S.A.

tel:+1-702-896-1858 fax:+1-702-896-3034 www.adrielec.com

AEC-BOX-1 Manual Page 1 of 20 January 1997

*** FCC NOTICE ***

This equipment has been tested and found to

comply with the limits for a Class A digital

device, pursuant to Part 15 of the FCC rules.

These limits are designed to provide

reasonable protection against harmful

interference when the equipment is operated in

a commercial environment. This equipment

generates, uses, and can radiate radio

frequency energy and, if not installed and

used in accordance with the instruction

manual, could cause harmful interference to

radio communications. Operation of this

equipment in a residential area may cause

harmful interference, in which case the user

will be required to correct the interference

at his or her own expense.

*** COPYRIGHT NOTICE ***

You are authorized to copy and make changes to the firmware for

this product only as described in this manual. Any other copies

or changes constitute an infringement of our copyright.

*** TRADEMARK NOTICES ***

Adrienne, AEC, AEC-BOX, PC-207M, PC-LTC, PC-VITC, and PC-VLTC

are trademarks of Adrienne Electronics Corporation.

SMPTE is a registered trademark of

The Society of Motion Picture and Television Engineers, Inc.

AEC-BOX-1 Manual Page 2 of 20 January 1997

TABLE OF CONTENTS

Title Page and Copyright Notice.................................1

FCC and Trademark Notices.......................................2

Table of Contents...............................................3

Introduction....................................................4

Getting Started Quickly.........................................4

Specifications..................................................5

Hardware Description............................................6

External Cabling Installation...................................7

AC Input Voltage Range Selection................................8

DIP Switch Programming.........................................10

BINARY Message Protocol........................................12

ASCII Message Protocol.........................................13

Break Character Detection......................................14

Serial Interface Standards.....................................15

Troubleshooting Guide..........................................16

Warranty Registration, Warranty Service, etc...................17

ASCII Code Chart...............................................18

Number System Conversion Table.................................19

Where to Order Copies of Standards.............................20

ser Feedback Request........................................back

Ordering Guide...............................................back

Schematics...................................................back

AEC-BOX-1 Manual Page 3 of 20 January 1997

INTROD CTION

Adrienne Electronics Corporation (AEC) developed the AEC-BOX-1

play speed LTC reader with RS232 and RS422 outputs to provide a

low cost way of reading Longitudinal Time Code (LTC) using a

variety of personal computers and other devices. It works

equally well with both the SMPTE (30fps) and EB (25fps) time

codes, in both the forward and reverse tape directions.

Longitudinal Time Code (LTC) is a specialized audio signal which

contains digital time-of-day and frame count information relating

to an accompanying video signal. As an audio signal, it can be

recorded and played back by video and audio tape machines. LTC

is used for audio/video editing, logging, and/or automation

purposes. Time code standards have been around for many years,

and are sponsored by both SMPTE (for NTSC) and the EB (for PAL).

Related products include our PC-LTC, PC-VITC, and PC-VLTC

families of Longitudinal Time Code (LTC) and Vertical Interval

Time Code (VITC) readers and generators for IBM PC personal

computers, along with other members of the AEC-BOX family of

standalone VITC, LTC, video, RS232, and RS422 interface boxes.

Call us if you want more information on any of these products.

GETTING STARTED Q ICKLY

If you want to use your AEC-BOX-1 right away, without reading the

whole manual, just do the following:

1) Plug the AC power cord into a suitable voltage AC outlet.

2) Connect the LTC input signal to the "LTC IN" RCA jack.

3) se a serial data cable to connect the 9-pin D connector

(on the box) to your computer or other device.

The box should now be spewing out serial data corresponding to

the time code it sees at the LTC input. The software protocol is

described elsewhere in this manual. If no LTC is present, the

power LED will blink every 1.5 seconds, and a short message will

be sent. If something doesn't work, you will have to carefully

read the "INSTALLATION" section of this manual.

AEC-BOX-1 Manual Page 4 of 20 January 1997

AEC-BOX-1 SPECIFICATIONS

LTC INP T (factory default single-ended mode):

Impedance 20kohms typical

Input Level 100mVpp to 20Vpp

DC on Input +1V maximum

LTC INP T (optional differential mode):

Impedance 20kohms typical

Input Level 100mVpp to 20Vpp

DC on Input +1V maximum

CMRR >26dB @ 60Hz

LTC READER:

Speed Range (2) 1/30x to 2.2x (w.r.t. play speed)

Tape Direction Forward or Reverse

Bits Read ALL time, user, and control bits.

Time Code Standard Both SMPTE and EB , without modification.

MISCELLANEO S:

Box Dimensions (3) 16cm wide x 5cm high x 21cm long

Box Weight 1.2kg

Power Consumption 7W

Temperature Range 0 to 50 degrees Centigrade

Relative Humidity p to 95%, noncondensing

Notes:

(1) All specifications are subject to change without notice.

(2) LTC signals at much below play speed are often too distorted

to read. Varies with tape format, tape, machine, etc.

(3) Allow at least 6cm in rear for power and other connectors.

AEC-BOX-1 Manual Page 5 of 20 January 1997

AEC-BOX-1 HARDWARE DESCRIPTION

Throughout the following discussion you may want to refer to the

AEC-BOX-1 schematic which is in the back of this manual. If your

box has been customized in any way for your application, then the

descriptions below may not be entirely accurate.

The power supply primary side comprises power transformer T1 and

thermal "fuse" device F1. Of special note is the fact that this

"fuse" does not burn out. If it trips, turn the power off for

one minute to let it cool/reset, then turn the power back on.

The power supply secondary side starts with full wave rectifiers

DB1 and DB2, plus large filter capacitors C72, C73, C82, and C83.

The resulting unregulated DC supplies are then passed through

voltage regulators 70(+5V), 72(+12V), and 73(-12V).

The LTC input at RCA jack J1 first goes through a differential

amplifier centered about 10A. Note that the outer conductor on

the RCA jack is normally grounded, but may be converted to a true

differential input by cutting jumper X3. See the INSTALLATION

section for details.

The output of the differential amplifier is AC coupled to

eliminate DC offsets, then is fed into the window comparator made

up of quad comparator 9 and surrounding components. This

comparator automatically senses the incoming signal level and

adjusts itself as needed to recover the LTC transition data even

from very poor quality input signals.

The complementary outputs of the window comparator go directly to

microcomputer 4, which decodes the LTC data via a proprietary

software algorithm.

Microcomputer 4, together with address latch 20 and EPROM 1,

form a completely self contained (but miniature) computer system.

DIP switch SW1 allows easy modification of box operating modes,

baud rates, and other features.

Serial data from microcomputer 4 is translated to RS232 levels

by 7, and is translated to RS422 levels by 14. Nine pin "D"

connector J3 contains the RS232 and RS422 transmit data lines.

AEC-BOX-1 Manual Page 6 of 20 January 1997

AEC-BOX-1 EXTERNAL CABLING INSTALLATION

LTC INP T CONNECTION:

RCA jack J1 is the high impedance (20kohm) LTC input connector.

The AEC-BOX-1 can read both SMPTE and EB time codes without

modifications.

As shipped from the factory, the RCA jack's outer conductor is

connected to frame ground (the box chassis) via shunt X3 (next to

J1). You may remove X3 in order to get a true differential LTC

input, provided that the common mode voltage (usually 50/60Hz

hum) is less than 2Vrms. In this configuration, you may also

want to wrap electrical tape around the outside of the RCA input

plug so that its outer conductor cannot short to the rear panel

inadvertently.

SERIAL O TP T CONNECTIONS:

If you ordered a serial data cable with your AEC-BOX-1, just plug

it in to the 9-pin "D" connector (which has socket contacts) on

the back of the unit. Otherwise, you may use the kit of mating

connector parts to wire up to the box as follows:

Pin # | Function

========================

1 |

2 | TX422-

3 |

4 |

5 | TX232

6 |

7 | TX422+

8 |

9 | GND

Notes:

1) Tiny pin numbers are molded into the connector face.

Be careful not to be "off by one".

2) For RS422, note that the pinout is that of an ESbus Tributary.

3) Limit RS232 cables to 30 meters maximum.

4) Limit RS422 cables to 1200 meters maximum.

AEC-BOX-1 Manual Page 7 of 20 January 1997

AC INP T VOLTAGE RANGE SELECTION

Normally all AEC-BOX's are shipped with the transformer primary

wired for 100-130VAC. Your box will bear a special marking if it

has been wired for 200-260VAC instead. For your own safety,

PLEASE do not proceed unless the line cord has been unplugged!

Just turning off a power switch somewhere is not sufficient!

*** WARNING ***

NEVER OPEN P THE BOX unless the line cord has

been unplugged from its AC power source! To

do otherwise risks damage to your AEC-BOX, and

could even KILL you! We cannot assume

responsibility for such careless behavior.

Box Cover Removal:

First you must NPL G the AC power cord, remove all other cables,

then remove the bottom cover as follows:

1) se a small (#1) Phillips screwdriver to remove the two

small black screws which are on each side of the box.

2) Slide off the front and back black plastic bezels.

3) Turn the box over, then lift off the BOTTOM cover.

Note that you are now exposing yourself to a severe (FATAL) shock

hazard if the box is still plugged in to an AC power source!

Voltage Strap Modification for 200-260VAC:

In the area underneath power transformer T1, you will find four

large holes in a row, with "115V" and "230V" markings adjacent.

sing sharp nosed cutters, or some other appropriate tool, cut

out at least 2mm of the narrow trace next to each of the "115V"

markings. Then solder a short wire between the two holes closest

to the "230V" marking, being careful not to poke the ends of the

wire too far into the holes (could damage power transformer T1).

Also make sure that the wire you added is flush with the bottom

of the board, and will not even come close to touching to bottom

cover.

Voltage Strap Modification for 100-130VAC:

In the area underneath power transformer T1, you will find four

large holes in a row, with "115V" and "230V" markings adjacent.

Remove the wire between the two holes closest to the "230V"

marking. Then solder a short wire between each pair of holes

closest to the "115V" markings, being careful not to poke the

ends of the wire too far into the holes (could damage power

transformer T1). Also make sure that the two wires you added are

flush with the bottom of the board, and will not even come close

to touching to bottom cover.

AEC-BOX-1 Manual Page 8 of 20 January 1997

AC POWER INP T VOLTAGE RANGE SELECTION

(continued)

Box Cover Replacement:

Basically, just follow the earlier instructions in reverse order

(power to the box must be OFF):

1) Put the bottom cover back in place.

2) Slide a black plastic bezel onto each end of the unit. The

box looks better if the two small molding marks are facing

towards the bottom of the unit.

3) Reattach the bezels to the chassis with the four small

black screws you removed earlier. Be careful not to strip

the threads in the aluminum side extrusions!

Label The Line Cord:

Attach a small label to the plug end of the line cord, so that

the next person to use this AEC-BOX will know what AC power input

voltage range it expects to see.

Test Your Work:

BEFORE connecting any cables to the box, plug it in to the

appropriate AC power source and make sure it works (no smoke).

INSTALLING YO R OWN AC POWER LINE PL G

If the plug on the end of the AC line cord is not suitable, you

can cut it off and put on your own. Where possible, please wire

the new plug as follows:

1) Green = Ground (Chassis)

2) Blue = Neutral

3) Brown = Hot

In no case should the green wire be connected to anything but

ground! se a continuity tester to verify that the ground lug on

your new power cord is connected directly to the AEC-BOX chassis.

AEC-BOX-1 Manual Page 9 of 20 January 1997

DIP SWITCH PROGRAMMING

Box Cover Removal:

First you must NPL G the AC power cord, remove all other cables,

then remove the top cover as follows:

1) se a small (#1) Phillips screwdriver to remove the two

small black screws which are on each side of the box.

2) Slide off the front and back black plastic bezels.

3) Lift off the top cover.

Note that the bottom cover will fall off easily at this point,

exposing you to a severe (FATAL) shock hazard if the box is

still plugged in to an AC power source!

*** WARNING ***

NEVER OPEN P THE BOX unless the line cord has

been unplugged from its AC power source! To

do otherwise risks damage to your AEC-BOX, and

could even KILL you! We cannot assume

responsibility for such careless behavior.

Changing DIP Switch (SW1) Settings:

Note that the switches are numbered 1 through 8. Also note the

small "1" and "0" numbers which are on the left and right ends of

SW1. To set a switch to be a "1", simply press down on the "1"

(OPEN) end of that switch. Conversely, to set a switch to be a

"0", simply press down on the "0" end of that switch. All done!

DIP Switch Functionality:

Switch Function

1 Baud Code #1

2 Baud Code #2

3 Odd(1) or Even(0) Parity

4 Parity Enabled(1) or Disabled(0)

5 Seven(1) or Eight(0) Data Bits, & Protocol Control

6 reserved (set to 0)

7 reserved (set to 0)

8 reserved (set to 1)

The two "Baud Code" bits function as follows:

1 2

1 1 => 38400 baud

1 0 => 19200 baud

0 1 => 9600 baud

0 0 => 1200 baud

Note that at 1200 baud, it normally takes longer than one LTC

frame to transmit a message, so some LTC frames will be skipped.

AEC-BOX-1 Manual Page 10 of 20 January 1997

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