Datum bc632D User manual

bc632D
Wall Mount LED Display
8500-0015
User’s Guide
Rev. A
(June, 2000)

bc632D
Wall Mount LED Display
User’s Guide
March, 1997

Datum Inc bc632D Wall Mount LED Display (Rev A) i
bc632D
WALL MOUNT LED DISPLAY
TABLE OF CONTENTS
SECTION PAGE
ADDENDUM A
OFFSET PROGRAMMING
A.0 Set Local Offset Time (Shift-D)............................................................................................. A-1
A.1 Programming Offset Via Remote............................................................................................ A-1
A.2 Programming Offset Via RS-422........................................................................................... A-1
A.3 Set Leap Year....................................................................................................................... A-2
A.3.1 Programming Leap Year Via Remote....................................................................... A-2
A.3.2 Programming Leap Year Via RS-422...................................................................... A-3
CHAPTER ONE
INTRODUCTION
1.0 General...................................................................................................................................1-1
1.1 Features..................................................................................................................................1-1
1.2 Overview................................................................................................................................1-2
1.3 Time Code Formats................................................................................................................1-3
CHAPTER TWO
INSTALLATION AND SETUP
2.0 General...................................................................................................................................2-1
2.1 Setup -Internal Jumpers..........................................................................................................2-1
2.1.1 Accessing Jumpers...................................................................................................2-1
2.1.2 Jumper Location......................................................................................................2-2
2.1.3 Jumper JP1 -Control Bus Termination.....................................................................2-2
2.1.4 Jumper JP2 -RS-232/RS-485 Select for J3 Pin A6 .................................................2-3
2.1.5 Jumper JP3 -RS-232/RS-485 Select for J3 Pin A1 ................................................2-4
2.1.6 Jumper JP4 -Select Event or 1PPS for BNC J2.......................................................2-4
2.1.7 Jumper JP5 -Time Bus Termination.........................................................................2-5
2.1.8 Jumper JP6 -Control Bus Select..............................................................................2-6
2.1.9 Jumper JP7 -BNC J4 Function Select .....................................................................2-7

TABLE OF CONTENTS
bc632D Wall Mount LED Display (Rev A) Datum Inc
ii
2.2 Mounting Instructions ..............................................................................................................2-8
2.2.1 Wall Flush Mount.....................................................................................................2-8
2.2.2 Ceiling Suspension...................................................................................................2-8
2.2.3 Wall Mounting Using Brackets .................................................................................2-9
2.2.4 Countertop ..............................................................................................................2-9
2.3 Serial Time Bus.......................................................................................................................2-9
2.3.1 Digital Time Protocol..............................................................................................2-10
2.3.2 Multiplexed Time Protocol.....................................................................................2-12
2.4 Control Bus ..........................................................................................................................2-12
CHAPTER THREE
OPERATION AND PROGRAMMING
3.0 General...................................................................................................................................3-1
3.1 Operation...............................................................................................................................3-1
3.1.1 Labels......................................................................................................................3-1
3.1.2 Status Lights ............................................................................................................3-2
3.1.3 Programming............................................................................................................3-2
3.2 Infrared Keyboard..................................................................................................................3-3
3.2.1 Keyboard Operation................................................................................................3-3
3.2.2 Keyboard Functions.................................................................................................3-3
3.2.3 Sound Control.........................................................................................................3-6
3.2.4 On-Off ....................................................................................................................3-6
3.2.5 Keyboard Batteries..................................................................................................3-7
3.3 Programming Details ...............................................................................................................3-7
3.3.1 Memory Structure....................................................................................................3-7
3.3.2 Selecting Steps.........................................................................................................3-7
3.3.3 Editing .....................................................................................................................3-8
3.3.4 Source -Select Time Source....................................................................................3-8
3.3.5 Label -Edit Text Labels...........................................................................................3-9
3.3.6 Format -Change Display Format ...........................................................................3-10
3.3.7 Color -Change Display Color................................................................................3-11
3.3.8 Duration -Change Run Time of a Step ...................................................................3-12
3.3.9 Link -Link to Next Step........................................................................................3-12
3.3.10 Master (Shift-C) -Enable Digital Time Master Transmissions................................3-12
3.3.11 Set Time (Shift-D) -Set Internal Clock.................................................................3-12
3.3.12 Event (Shift-E) -Change Event Capture Parameters .............................................3-13
3.3.13 Addr (Shift-F) -Change Local Address ...............................................................3-14
3.3.14 Program Retention...............................................................................................3-14
3.4 Programming Summary.........................................................................................................3-14
3.5 Initial Parameters...................................................................................................................3-17

TABLE OF CONTENTS
Datum Inc bc632D Wall Mount LED Display (Rev A) iii
CHAPTER FOUR
I/O CONNECTORS
4.0 General...................................................................................................................................4-1
4.1 J2 Event Input/1PPS Output BNC Connector .........................................................................4-1
4.2 J3 RS-485 Serial Differential Input/Output...............................................................................4-1
4.2.1 Serial Output Messages............................................................................................4-3
4.3 J4 Timecode Input BNC Connector........................................................................................4-4
CHAPTER FIVE
ADJUSTMENTS
5.0 Phase-Locked Loop Adjustment.............................................................................................5-1
CHAPTER SIX
DRAWING SET
6.0 General...................................................................................................................................6-1
APPENDIX A
DIGITAL TIME TRANSMISSION PROTOCOL
A.0 Introduction........................................................................................................................... A-1
A.1 Physical................................................................................................................................. A-1
A.1.1 Device Connection................................................................................................. A-1
A.2 Signal Description.................................................................................................................. A-1
A.3 Cable.................................................................................................................................... A-2
A.4 Daisy-Chaining...................................................................................................................... A-2
A.5 Bussing ................................................................................................................................. A-3
A.6 Termination........................................................................................................................... A-4
A.7 Logical Description................................................................................................................ A-4
A.7.1 Bit Rate, Parity and Framing Bits ............................................................................ A-4
A.7.2 Message Formats................................................................................................... A-5
A.7.3 Digital Time -Character Mode............................................................................... A-5
A.7.4 Digital Time -Pulse Mode...................................................................................... A-6
A.7.5 Multiplex Time ....................................................................................................... A-7
A.8 Time Tags ............................................................................................................................. A-8

TABLE OF CONTENTS
bc632D Wall Mount LED Display (Rev A) Datum Inc
iv
APPENDIX B
bc632D CONTROL BUS PROTOCOL
B.0 Introduction............................................................................................................................B-1
B.1 RS-485 Signals ......................................................................................................................B-1
B.2 Daisy Chaining........................................................................................................................B-2
B.3 Bussing...................................................................................................................................B-2
B.4 Termination............................................................................................................................B-3
B.5 Logical Description.................................................................................................................B-3
B.5.1 Bit Rate, Parity, and Framing Bits.............................................................................B-3
B.5.2 Command Formats..................................................................................................B-4
B.5.2.1 Address ...................................................................................................B-4
B.5.2.2 Event........................................................................................................B-4
B.5.2.3 Master .....................................................................................................B-5
B.5.2.4 Set Real Time Clock.................................................................................B-5
B.5.2.5 Source .....................................................................................................B-6
B.5.2.6 Label........................................................................................................B-6
B.5.2.7 Format.....................................................................................................B-7
B.5.2.8 Color .......................................................................................................B-8
B.5.2.9 Duration...................................................................................................B-8
B.5.2.10 Link .......................................................................................................B-9
B.5.2.11 Halt........................................................................................................B-9
B.5.2.12 Step.......................................................................................................B-9
B.5.2.13 Set.........................................................................................................B-9
B.5.2.14 Start.....................................................................................................B-10
B.5.2.15 Stop.....................................................................................................B-11
B.5.2.16 Echo ....................................................................................................B-11
B.5.2.17 End ......................................................................................................B-12
B.6 Examples ............................................................................................................................B-12

Datum Inc bc632D Wall Mount LED Display (Rev A) A-1
ADDENDUM A
OFFSET PROGRAMMING
A.0 SET LOCAL OFFSET TIME (SHIFT-D)
The SET TIME function key (SHIFT-D) is used for both set internal clock and set local offset time
features. To enter SET LOCAL OFFSET TIME menu by pressing SHIFT-D, the display first appears
on the SET TIME menu "TIME hh:mm:ss". Without any modification on the SET TIME menu, press
the SELECT key to set local offset time. The display prompts the offset time of the first source display
"OFFSET 1 +/-XX" hour(s). The local offset time can be set to +/-19 hours. The bc632D module
has the capability to display eight (8) different local offset times from a single time source. When the
SELECT key is pressed again, the display scrolls to the next source display offset time menu. You
may press the RUN function key to exit the SET TIME menu any time.
A.1 PROGRAMMING OFFSET via REMOTE
The following brief example shows set local offset time on source display one:
Press SHIFT D To enter SET TIME menu.
TIME hh:mm:ss
Press SELECT Go to next menu.
OFFSET 1 +00
Type in -08 Type in -08 hours.
Press RUN Exit SET TIME menu.
The time is -08 hours on source 1 (SRC 1)
A.2 PROGRAMMING OFFSET via RS-422
addr aaa set bc632D display address
offset 1 -08 set to -08 hours
end
Note:See Appendix B for bus protocol.

ADDENDUM A
A-2bc632 Wall Mount LED Display (Rev A) Datum Inc
A.3 SET LEAP YEAR
The standard IRIG time code does not carry leap year information. When local offset time is set for the
display, the leap year flag is required for the bc632D display time rollovers from 365 days or 366 days
to 1 day.
A.3.1 PROGRAMMING LEAP YEAR via REMOTE
The SET LEAP YEAR feature also shares the same function key with SET TIME and OFFSET. The
following example sets current year to be leap year:
Press SHIFT D
TIME hh:mm:ss SET TIME menu.
Press SELECT
OFFSET 1 +/-XX OFFSET 1 menu.
Press SELECT
OFFSET 2 +/-XX OFFSET 2 menu.
Press SELECT
OFFSET 3 +/-XX OFFSET 3 menu.
Press SELECT
OFFSET 4 +/-XX OFFSET 4 menu.
Press SELECT
OFFSET 5 +/-XX OFFSET 5 menu.
Press SELECT
OFFSET 6 +/-XX OFFSET 6 menu.
Press SELECT
OFFSET 7 +/-XX OFFSET 7 menu.
Press SELECT
OFFSET 8 +/-XX OFFSET 8 menu.
Press SELECT
Leap Year? Y/N LEAP YEAR menu.
Type in Y Set LEAP YEAR flag to leap year.

ADDENDUM A
Datum Inc bc632D Wall Mount LED Display (Rev A) A-3
A.3.2 PROGRAMMING LEAP YEAR via RS422
addr aaa display address
leapyear 1 set LEAP YEAR flag
end

ADDENDUM A
A-4bc632 Wall Mount LED Display (Rev A) Datum Inc
This Page Intentionally Left Blank.

Datum Inc bc632D Wall Mount LED Display (Rev A) 1-1
CHAPTER ONE
INTRODUCTION
1.0 GENERAL
The bc632D Wall Display Operation and Technical Manual provides the following information:
•General Introduction.
•Installation and Setup Details.
•Operation and Programming.
•I/O Signal Information.
•Theory of Operation.
•Drawing Set.
1.1 FEATURES
The salient features of the bc632D Wall Display include:
•Real Time Clock operation with millisecond precision.
•Decodes commonly used time code formats, IRIG B, IRIG A, NASA 36 and 2137.
•Decodes modulated or un-modulated (DC level shift) time codes.
•Master/Slave operation allows digital synchronization of multiple bc632D's.
•Up to six separate time channels multiplexed on one cable to multiple bc632D's.
•Continues to provide time, “flywheels,” during loss of the external time code source.
•Battery-backed Real Time Clock maintains time during power loss and can be synchronized to an
external time code.
•Battery-backed control values allow one-time setup.
•Supports external event time capture input with programmable polarity.
•Flexible programming displays allow multi-screen time formats.

CHAPTER ONE
1-2bc632D Wall Mount LED Display (Rev A) Datum Inc
1.2 OVERVIEW
The bc632D is a wall-mounted time display designed to read serial time code signals, and digitally
synchronize multiple displays. The bc632D also incorporates a battery-backed real time clock which
maintains time during power loss and can be synchronized to an external time code signal.
The bc632D is programmed using a hand-held infrared remote control keyboard. The keyboard is
used in selecting the display format and time source that the bc632D decodes. It sets and reads the real
time clock, activates event time capture operations, and reads the captured time and status.
The principal performance characteristics are listed in Table 1-1.
Table 1-1
Principal Performance Characteristics
Item Item Description
Time Code Reader Time Code Formats IRIG A, B, NASA 36, 2137.
Carrier Range IRIG A -10kHz ±2%.
IRIG B -1 kHz ±2%.
NASA 36 -1 kHz ±2%.
2137 -1 kHz ±2%.
Flywheel Accuracy Less than 3.6 milliseconds per hour.
Modulation Ratio 3:1 to 6:1.
Input Amplitude 100 mVrms to 1 Vrms.
Input Impedance 10K Ω(AC coupled).
Real Time Clock Format 24 Hour.
Accuracy ±10PPM.
Power 7 VAC from provided power supply; 40 W.
TTL/CMOS Input
Signals Event Capture TTL/CMOS, positive or negative edge triggered, 50 ns min width.
TTL Output Signals 1 Pulse Per Second TTL/CMOS, positive edge on time.
RS-485 Input/Output
Signals Serial Time/Message TX/RX (+), TX/RX (-). 9600 Baud, 8 bits, 1 stop bit, no parity.
TX (-) compatible with most RS-232 devices.
RS-232 Input/Output
Signals Control Bus RS-232 IN, RS-232 OUT. 9600 Baud 8 bits, 1 stop bit, no parity.
Pins selectable as RS-23 or RS-485.
Operating and Storage
Environments The display is intended for indoor use only.

INTRODUCTION
Datum Inc bc632D Wall Mount LED Display (Rev A) 1-3
1.3 TIME CODE FORMATS
The widespread use of coded timing signals to assist in the correlation of intercept and test data began in
the early 1950's. These signals can be decoded in real time to indicate the current
Time of Day (TOD) or recorded along with intercept/test data on magnetic tape recorders for post
processing and time correlation.
Hundreds of time code formats were developed -one for each agency involved. During the early
1960's the InterRange Instrumentation Group promoted a series of “standard” time code formats now
loosely referred to as “IRIG Time Codes.” The bc632D decodes four of these formats: IRIG A, IRIG
B, 2137, and NASA 36.
More complete details on these and other time code formats are available free of charge, on request
from either Bancomm Division or Datum Inc in the form of the Datum Inc, Handbook of Time Code
Formats. Figure 1-1 illustrates a frame of IRIG A, B or G time code.

CHAPTER ONE
1-4bc632D Wall Mount LED Display (Rev A) Datum Inc
Figure 1-1
IRIG Time Code Frame

Datum Inc bc632D Wall Mount LED Display (Rev A) 2-1
CHAPTER TWO
INSTALLATION AND SETUP
2.0 GENERAL
To begin using the bc632D, you may need to move some of the internal jumpers, and mount the display
to a wall, ceiling or countertop. This chapter gives instructions on jumper settings and mounting. You
may also need to program the bc632D for your application. A full description of all the programmable
options can be found in Chapter Three.
2.1 SETUP -INTERNAL JUMPERS
There are five jumpers on the internal circuit board which are used to modify the operation of the
bc632D. They are set (at the factory) to the following:
Time Bus Un-Terminated.
Control Bus Un-Terminated.
J3 Rx Pins 1 and 6 RS-232 Levels.
BNC J2 1PPS Out.
BNC J4 Modulated Time Code Input.
If you only have one bc632D, and you are using it with the internal clock or modulated time code, and
you have no need to use the event capture input, then you do not need to change any of the jumpers.
If you need to use the event capture input, DC level shift time codes, or the networking capabilities of
the bc632D, then you will have to change the jumpers accordingly.
2.1.1 ACCESSING JUMPERS
To change the jumpers, follow this procedure:
•Lay the bc632D face down on a soft non-marring surface.
•Remove the screws from the rear of the case.
•Carefully remove the back cover, rotating it toward the bottom of the display to clear the
connectors.
•Move jumpers to the desired configuration.
•Replace the back cover and screws.

CHAPTER TWO
2-2bc632D Wall Mount LED Display (Rev A) Datum Inc
2.1.2 JUMPER LOCATION
There are several circuit boards in the bc632D case. All the user-configurable jumpers are on the
timing board. When you look at the back of the display, the timing board is found at the right hand side
of the display, mounted on four white plastic spacers.
Figure 2-1 shows the location of the jumpers on the timing board.
2.1.3 JUMPER JP1 -CONTROL BUS TERMINATION
When you use the Control Bus, you must terminate the ends of the network with a 100Ωresistor. The
resistor may be external or internal to the bc632D. To use the internal terminating resistor, place the
jumper on JP1 between pins 3 and 4. Otherwise place the jumper between pins 1 and 2.
J2 J4
Dual
RJ11
J3
B A
JP1
JP4
JP7
JP5
JP2
JP3
Figure 2-1
bc632D Jumper Locations

INSTALLATION AND SETUP
Datum Inc bc632D Wall Mount LED Display (Rev A) 2-3
2.1.4 JUMPER JP2 -RS-232/RS-485 SELECT FOR J3 PIN A6
Two pins on connector J3 are dual-purpose. They provide an RS-232 port to a controlling computer,
or an RS-485 port for connecting a network of displays. If the display is to be connected directly to
the RS-232 port of a computer, then leave the jumpers between pins 1 and 2 of JP2. This routes pin
A6 to an RS-232 driver. If you are using the display as part of a daisy-chained network, put the
jumper on pins 2 and 3, which routes pin A6 to the (+) terminal of an RS-485 transceiver.
1
2
3
4
1
2
3
4
Not Terminated
(Factory Setting)
Terminated
Figure 2-2
Jumper JP1 Settings
3 12
3 12
JP2
JP2
RS-232
(Factory Setting)
RS-485
Figure 2-3
Jumper JP2 Settings

CHAPTER TWO
2-4bc632D Wall Mount LED Display (Rev A) Datum Inc
2.1.5 JUMPER JP3 -RS-232/RS-485 SELECT FOR J3 PIN A1
If the display is to be connected directly to the RS-232 port of a computer, then leave the jumpers
between pins 1 and 2 of JP3. This routes pin A1 to an RS-232 receiver. If you are using the display as
part of a daisy-chained network, put the jumper on pins 2 and 3, which routes pin A1 to the (-) terminal
of an RS-485 transceiver.
Note:If you use the RS-232 input, be sure that JP6 is installed as described in Section 2.1.8.
2.1.6 JUMPER JP4 -SELECT EVENT OR 1PPS FOR BNC J2
Jumper JP4 is used to select the signal present on BNC connector J2. Normally, the jumper is
connected between pins 1 and 2, so that BNC J2 is used as a 1PPS output. To use BNC J2 as an
event input, move the jumper to pins 3 and 4.
1
2
3
4
1
2
3
4
1PPS Output
(Factory Setting)
Event Input
Figure 2-5
Jumper JP4 Settings
3 12
3 12
JP3
JP3
RS-232
(Factory Setting)
RS-485
Figure 2-4
Jumper JP3 Settings

INSTALLATION AND SETUP
Datum Inc bc632D Wall Mount LED Display (Rev A) 2-5
1
2
3
4
1
2
3
4
Not Terminated
Terminated
Figure 2-6
Jumper JP4 Settings
2.1.7 JUMPER JP5 -TIME BUS TERMINATION
When you use the Digital Time or Multiplex Time protocols, you must terminate the ends of the network
with a 100Ωresistor. The resistor may be external or internal to the bc632D. To use the internal
terminating resistor, place the jumper on JP2 between pins 3 and 4. Otherwise place the jumper
between pins 1 and 2.
2.1.8 JUMPER JP6 -CONTROL BUS SELECT
Install the jumper on JP6 if RS-232 pins are being used, that is, if jumper JP3 is on pins 1 and 2. This
tells the display that it must enable the RS-485 drivers that are being driven from the controlling
computer. If you are not using the RS-232 pins or a controlling computer, then remove jumper JP6.
This will cause the display to keep those RS-485 drivers off.
Note:Only one display in a network can have its JP6 installed. Otherwise, control signals from
the computer be corrupted.
12
12
JP6
JP6
Using RS-232
(Factory Settings)
Not Using RS-232
Figure 2-7
Jumper JP6 Settings

CHAPTER TWO
2-6bc632D Wall Mount LED Display (Rev A) Datum Inc
2.1.9 JUMPER JP7 -BNC J4 FUNCTION SELECT
Jumper JP7 selects the signal present on BNC connector J4. Normally, the jumper is connected
between pins 7 and 8, so that BNC J4 is used as the modulated time code input. BNC J4 can be used
for other functions as shown in Figure 2-4.
Note that the Event Input is available on either BNC J2 or J4. The Event Input would only be selected
on J4 if the 1PPS output is required and the bc632D is using its internal clock or the RS-485 port as
the source of time.
1
2468
357
1
2468
357
1
2468
357
Event Input
DC Level Shift In
Time Code Input
Figure 2-8
Jumper JP7 Settings