Zenith Hcs2000r User manual

Communication Interface System Setup Guide | Warranty

Models | HCS2000R, Head-End Unit • HCS100T, Card | for Concierge TVs

RECORD MODEL NUMBER

The model and serial number are located on the product. For

future convenience, we suggest that you record these

numbers here:

MODEL NO.____________________________________

SERIAL NO.____________________________________

WARNING:

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE.

REFER TO QUALIFIED SERVICE PERSONNEL.

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence

of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a

risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating

and maintenance (servicing) instructions in the literature accompanying the appliance.

WARNING:

TO PREVENT FIRE OR SHOCK HAZARDS, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.

POWER CORD POLARIZATION:

CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION:

POUR ÉVITER LES CHOCS ÉLECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE

CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU’AU FOND.

NOTE TO CABLE/TV INSTALLER:

This reminder is provided to call the cable TV system installer’s attention to Article 820-40 of the National Electric Code

(U.S.A.). The code provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be

connected to the grounding system of the building, as close to the point of the cable entry as practical.

REGULATORY INFORMATION:

This equipment has been tested and found to comply with the limits for a Class B 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 residential installation. This equipment generates, uses and can radiate radio frequency

energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio

communications. However, there is no guarantee that interference will not occur in a particular installation. If this

equipment does cause harmful interference to radio or television reception, which can be determined by turning

the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following

measures: •Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.

CAUTION:

Do not attempt to modify this product in any way without written authorization from Zenith Electronics Corporation.

Unauthorized modification could void the user’s authority to operate this product.

WARNING

RISK OF ELECTRIC SHOCK

DO NOT OPEN

2-WIRE COMM-WARN

Head-End

Unit

Mens

Dept. Sports

Dept. Toy

Dept.

Hrdwe.

Dept. Auto

Dept. Food

Dept.

2 3

Signal

Combiner

Modulator

Outputs

Broadband

Amplifier

Signal

Combiner

Department TVs

Host Computer

Passive Signal

Splitter

4 5 6

Back of

Computer

PRN System Setup Overview

Use this overview for reference to set up an in-store communications interface system

Important

Use of the sample equipment provided, as well as

with the other necessary equipment not provided,

may expose the operator to hazardous voltages. It is

assumed that the user is familiar with good safety

and handling procedures and precautions. Zenith assumes no lia-

bility for any damage to any equipment or injuries as a result of

working with the sample equipment provided.

System Setup Equipment

For testing and evaluation of the Zenith Communications

Interface Link system, and for development of the PRN propri-

etary software, the following items are required:

— HCS2000R unit.

— TV Modem Card HCS100T.

— Zenith Commercial Products Concierge Series television.

— DE9P to DE9S, “straight through” serial cable (not provided).

— Host computer with serial port (not provided).

— Two way 75 ohm splitter/combiner (not provided).

Optional Equipment Within System

— Broadband Amplifier (not provided).

— Modulator output sources (not provided).

— Passive signal splitter (not provided).

Power Supply

The HCS2000R prototype requires 120V AC, 60Hz, 1 Amp peak,

nominally drawing less than 50 watts. The connection is via

206-3594 PAGE 3

System Overview

ANTENNA

CABLE

M.P.I.

TV Back

TV Back Connections Panel

(Expanded View)

R- AUDIO- L

VIDEO

IN MATRIX

OUT

TO CABLE

DISTRIBUTION

I.D.

CONFIGURATION

COMPUTER

CONTROL

POWER

12345678

PAGE 4 3-WireRev6/00

polarized 2-co

nductor connector. Do not defeat this polariza-

tion. The wide blade pin is the neutral side of the power sup-

ply.

Computer

A computer with an RS232 serial port set at 1200, n, 8, 1;

connection is via DBE9 connector. The signals used are Tx,

Rx, and ground, on pins 2, 3, and 5. Do not connect or use

any other pins on this connector.

Software & Operating System

This unit has been tested using the Windows program,

Hyperterminal, on a Windows 98 and a Win NT4 platform. The

software in the unit is able to interact properly with

Hyperterminal, even when it generates a small delay (up to

115mS) between the first byte sent and subsequent bytes sent

from the computer to the unit.

Other operating systems and programs should work, provided

that they do not introduce any noise or erroneous data pack-

ets.

TV Interface

Communications between the Head End unit and the TV are via

the 75 ohm RF cable. Connection to the TV card and Head

End unit is via F-Connector.

Setup Instructions

To begin development of the PRN system software, the head

end unit and the TV card must be set up.

Head End Unit Communication Interface Link Setup

1) Plug the AC power cord into 120VAC 60Hz supply.

2) Attach one end of an F-connector RF cable to the F-connec-

tor on the rear of the HCS2000R unit. Connect the other end

of this cable to “A” half of the splitter.

3) Attach another piece of 75 ohm RF cable to the “B” half of

the splitter. Connect the other end of this cable to the RF

programming source (antenna, cable, etc).

4) Connect a long piece of 75 Ohm RF cable to the

“combine/input” port of the splitter. The other end of this

long cable shall be used to connect to the TV card.

5) Set the head-end to the desired a

ddress, default is $00h

(all dip switches set to ON).

6) Connect a “straight through”, serial cable between the

computer and the HCS200R unit via the DBE9 cable.

TV End Setup

Note: Each TV requires its own unique address.

(Required if the TV does not have a card)

1) Unplug the TV from AC power.

2) Remove the “MPI Card” from the SuperPort on the rear of

the TV.

3) Each TV requires its own unique a

ddress: Default is $FF, (all

switches off.) See “How to Set Dip Switch

Addresses” on page

...

4) Insert the TV modem card into the slot that originally con-

tained the MPI card. Note: if it is too difficult to connect

the RF cable to the TV modem card, the TV back may be

removed to help facilitate the installation. Make sure that the

TV modem card is properly seated in the SuperPort card slot.

Head-End Unit

Communication Interface

System Overview

206-3594 PAGE 5

5) Connect the other end of the F-connector RF cable (from the

HCS2000R unit, via the splitter) to the F-connector on the TV

modem card.

6) Connect an RF signal source (cable, antenna, vcr, etc) to the

F-connector on the TV modem card.

7) Plug the TV’s power cord into 120VAC 60Hz.

Protocol

The computer commands the TV by sending a packet of identifi-

cation information, command type, arguments data, and check-

sum to the HCCS2000R. If successful, the HCS2000R responds

back to the computer with a status message consisting of identi-

fication information, command type, data, and checksum. If not

successful, an error message is returned.

Identification

At this time, the do not have the capability to contain and use a

unique electronic identifier, so indiv

idual TVs identification is

achieved via the dip switches contained on the TV modem card.

For test purposes, these switches are set to OFF, indicating “TV

#FFFF”. Setting these switches to any other value means that

any message generated by the host computer must have the TV

identification selected as part of the message packet, otherwise a

no response error will occur.

Similarly, the HCS200R unit has the capability of being uniquely

identified. Normally, this feature will not be required, so leave

the switches set to all “ON, identifying the head end as 00.

Finally, the MSB of the head end MUST be set to 0. This is done

in hardware, so the MSB dip switch setting will not have any

effect. Likewise, the TV modem card MSB MUST be set to 1. The

sample card does NOT yet have this in hardware, so please leave

the dip switch set to “OFF” to assure the correct setting.

Head End Computer to Microcontroller

Interface Protocol

The “head end” master computer shall interface to the “head

end” RF modem’s microcontroller via 1200 baud, 1/2 duplex, 8

bit word, 1 stop bit, no parity serial port. The commands from

the master computer to the modem shall consist of between 5

and 64 eight bit bytes total. However, this prototype is limited

to 20 bytes. The format shall be:

Byte Range Description

Master # 00-7F Head End RF Modem ID number (MSB is error

flag)

TVID1 80-FF Upper Nibble TV ID a

ddress (MSB is always 1)

TVID2 00-FF Lower Nibble TV ID a

ddress

TV Command 00-FF Command type directed to the TV

Number of Arguments 00-3A Number of argument bytes

to follow - can be 0 to 58

Argument 1 00-FF First Argument

Argument 2 00-FF Second Argument

Argument Last 00-FF Last argument

Check Sum 00-FF Modulo 256 check sum of all bytes

in command

Responses from the microcontroller back to the “head end” com-

puter are of the same format with two exceptions: first, the

most significant bit of the Master # byte is set to a ‘1’ by the

Remove old MPI card Install HCS100T TV Modem Card

System Overview

PAGE 6 3-WireRev6/00

microcontroller if there was an error resulting from the previous

command; second, in an error response, the number of argu-

ments is forced to be one, which is the error type code. The “TV

Command” byte returned by the microcontroller is forced to be

the “Error Code” response. This is a code that cannot be sent by

the “head end” computer, rather, it is a microcontroller to com-

puter message value only.

The “head end” computer must wait for a response from the

microcontroller before sending a subsequent command string.

There is no “stack” of commands from the “head end” computer,

so the microcontroller shall ignore any command strings received

before the initial string behaviors have been completed. No

response from the microcontroller shall be given to such com-

mands after the first one and before the first one has been

processed. In the event that the legitimate command is not

completed, due to the target TV not being present, or any other

error, the response from the microcontroller shall be the Error

Response with the appropriate Error Value. The maximum time

for the microcontroller to respond back to the “head end” com-

puter shall not exceed 6 seconds nor be less than 20mS. All

commands sent from the “head end” computer shall be respond-

ed to by the microcontroller with the correct command or error

response.

TV Directed Commands and Responses

The following are the commands that can be sent by the “head

end” computer to indiv

idual TVs in the system. All commands

not defined in this document at this time are reserved for future

use and should not be implemented or included in any “head

end” computer software interface device behavior. Performance

may be unpredictable for any undefined commands used. Note

that the specific information used by the microcontroller to cre-

ate the response message depends entirely on the data received

from the TV to which the command was directed. The specifics

of such data are detailed in a later section of this document and

in the MPI specification, 28-3977. Important: The portion of

the responses from the microcontroller that refer to the TV’s

Volume Level are not valid as of Feb. 2001. This is due to the

current model TVs’ inability to provide such information. The

response data received from the target TV will always show $00

for TVs regardless of the actual volume setting until such time as

the appropriate behavior is incorporated into the future models

of TV sets.

Command $01: Request TV Status

Arguments SENT from “head end” computer: none

Arguments RETURNED to “head end” computer: 2

Description: returns the signal, power, channel, and volume (if

available from TV) information

Data: the returned data is two 8-bit bytes, organized as follows:

Data Byte 1 (first data byte received):

Bit Description

7 TV Power, 1=ON, 0=OFF

6 TV Signal Status, 1=GOOD, 0=BAD

5-0 TV Volume Level (00=min, 63=max; this is not

available in all model TVs)

Data Byte 2 (second data byte received)

Bit Description

7-0 Channel Number, 00-FF (See MPI specification

for certain channel number definitions)

Example

“head end” computer sends: 01 01 80 01 00 83,

which means: “head end box” 01, TV number 8001, request sta-

tus, no arguments, check sum the microcontroller responds: 01

01 80 01 02 D4 09 62

which means: “head end box” 01, TV number 8001, status mes-

sage, 2 arguments, {power ON, signal GOOD, volume at 20/63},

{channel 9}, check sum.

Command $02: Turn TV ON

Arguments SENT from “head end” computer: none

Response: same as for Command $01.

Description: sends a command to the target TV to turn that TV’s

power ON

Example

“head end” computer sends: 01 01 80 02 00 84,

which means: “head end box” 01, TV number 8001, Turn TV ON,

no arguments, check sum the microcontroller responds: 01 01

80 02 02 D4 09 63

which means: “head end box” 01, TV number 8001, Power On, 2

arguments, {power ON, signal GOOD, volume at 20/63}, {channel

9}, check sum.

Command $03: Turn TV OFF

Arguments SENT from “head end” computer: none

Response: Status bytes, same as for Command $01.

Description: sends a command to the target TV to turn that TV’s

power OFF

Example

“head end” computer sends: 01 01 80 03 00 85,

which means: “head end box” 01, TV number 8001, Turn TV OFF,

no arguments, check sum

the microcontroller responds: 01 01 80 03 02 54 09 E4

which means: “head end box” 01, TV number 8001, Power OFF, 2

arguments, {power OFF, signal GOOD, volume at 20/63}, {chan-

nel 9}, check sum.

Command $04: TUNE CHANNEL

Arguments SENT from “head end” computer: 1; range of $00-$FF

Response: Status bytes, same as for Command $01.

System Overview

206-3594 PAGE 7

Description: sends a command to the target TV to tune that TV

to the specified channel

Example

“head end” computer sends: 01 01 80 04 01 21 A8,

which means: “head end box” 01, TV number 8001, Tune

Channel, 1 argument, channel 33, check sum the microcontroller

responds: 01 01 80 04 02 D4 21 7D,

which means: “head end box” 01, TV number 8001, Tune

Channel, 2 arguments, {power ON, signal GOOD, volume at

20/63}, {channel 33}, check sum.

Command $05: SET VOLUME LEVEL

Arguments SENT from “head end” computer: 1; range of $00-$63

Response: Status bytes, same as for Command $01.

Description: sends a command to the target TV to set that TV’s

current volume level

Example

“head end” computer sends: 01 01 80 05 01 07 8F,

which means: “head end box” 01, TV number 8001, Set Volume,

1 argument, level 7/63, check sum

the microcontroller responds: 01 01 80 05 02 C7 09 59,

which means: “head end box” 01, TV number 8001, Set Volume,

2 arguments, {power ON, signal GOOD, volume at 7/63}, {channel

09}, check sum.

Response Command $00: ERROR MESSAGE

Arguments SENT from “head end” computer: NONE - this is a

response FROM the microcontroller only!

Response: Error, Error Code

Description: This is a way to have the microcontroller provide

error information to the “head end” computer. There can be

errors from several causes, so there are specific error codes which

indicate the type of error encountered. The following is the list

of error codes and their descriptions:

Error Code Description

$00 The command from the computer is not

recognized

$01 The command from the computer had insufficient

number of bytes

$02 The command from the computer had too many bytes

$03 The command from the computer check sum byte did

not match the command string computed check sum

$04 The command included an invalid TV a

ddress or

incorrect head a

ddress - note: the error response Head

End ID returned will be the actual ID from the Head End

unit, not the incorrect one received initially.

$05 The command included an invalid data argument value

or incorrect number of arguments

$10 The target TV does not respond

$11 The target TV did not acknowledge previous command

(not implemented yet)

$12 The target TV gave an unknown response

(not implemented yet)

$22 The microcontroller is busy waiting for the TV to

respond

Other error code values not shown are reserved for future use.

Example

“head end” computer sends: 01 01 80 01 00 83,

which means: “head end box” 01, TV number 8001, request sta-

tus, no arguments, check sum

the microcontroller responds: 11 01 80 00 01 04 97,

which means: “head end box” 01 in error condition, TV number

8001, Error Message, 1 argument, error code 4 (invalid TV), check

sum.

Specifications

TBD!!!

206-3724

Issue*

PRNWrnty7-1

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