Knox Video RS16x16HB User manual

RS16x16HB
KNOX VIDEO
TECHNOLOGIES
8547 Grovemont Circle
Gaithersburg, MD 20877
TEL 301•840•5805
FAX 301•840•2946
www.knoxvideo.com
Operation and Technical Manual
Limited Warranty
Unless otherwise stated in the product specific documentation received
with this product, Knox Video Technologies provides a five-year limited
warranty for this product. The above warranty period shall begin on the
date of shipment by Knox to purchaser or, if purchaser is an authorized
reseller of such Knox products, from the date of shipment by the reseller to
the reseller’s original customer.
The warranty set forth above shall not apply to failure or deficiency
whichhasbeencausedbymisuse,abnormalorunusuallyheavyuse,neglect,
alteration,improperinstallation,unauthorizedrepair ormodification,improper
testing, accidental or causes external to the product such as but not limited
to excessive heat or humidity, power failure, or improper installation.
IFSERVICEISREQUIRED:
If the product does not perform as warranted, call Knox Video Technologies
at 301-840-5805 for available service options.
If it is necessary to return an item to Knox, the defective product should be
securelypackaged in original boxes and insured for shipment. Owner agrees
to insure and accept all liability for loss of or damage to this product.
YOU MUST CALLTECHNICAL SUPPORT AT 301-840-5805 FOR
A RETURN AUTHORIZATION NUMBER (RA) AND “SHIP-TO”
ADDRESS BEFORE SHIPPING ANY PRODUCT TO KNOX.
This warranty gives you specific legal rights, and you may also have other
rights, which vary from state to state.
Knox Video Technologies
8547 Grovemont Circle
Gaithersburg, MD 20877
301-840-5805 / 301-840-2946 Fax
www.knoxvideo.com

Warnings, Cautions and Others
Mises en garde, precautions et indications diverses
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presenceof uninsulated “dangerous voltage”within the
product’s enclosure that maybeof sufficient magnitude
to constitute a risk of electric shock to persons.
Theexclamation point, within anequilateral triangle, is
intended to alert the user to the presence of important
operatingandmaintenance(servicing)instructionsinthe
literatureaccompanying the appliance.
WARNING:TOREDUCETHERISKOFFIRE OR ELECTRIC SHOCK, DO
NOTEXPOSETHISAPPLIANCETORAINOR MOISTURE.
CAUTION
To reduce the risk of electrical shocks, fire, etc.:
1. Do not remove screws, covers or cabinet.
2. Do not expose this appliance to rain or moisture.
ATTENTION
Afin d’éviter tout risque d’électrocution, d’incendie, etc.:
1. Ne pas enlever es vis ni es panneaux et ne pas ouvrir le coff ret de
l’appareil.
2. Ne pas exposer l’appareil a la pluie ni a l’humidité.
Caution — STANDBY/ON switch!
Disconnect the mains plug to shut the power off completely. The STANDBY/ON
switch in any position does not disconnect the mains line. The power cannot be
remote controlled.
Attention — Commutateur STANDBY/ON!
Déconnecter la fiche de secteur pour couper complètement le courant. Le
commutateur STANDBY/ON ne coupe jamais complètement la ligne de secteur,
quelle que soit sa position. Le courant ne peut être télécommandé.
CAUTION
For U.S.A.
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 in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, 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.
For Canada/pour le Canada
CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO
WIDE SLOT, FULLY INSERT.
ATTENTION: POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA
PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET
POUSSER JUSQUAU FOND.
For Canada/pour le Canada
THIS DIGITAL APPARATUS DOES NOT EXCEED THE CLASS B LIMITS FOR RADIO
NOISE EMISSIONS FROM DIGITAL APPARATUS AS SET OUT IN THE INTERFERENCE-
CAUSING EQUIPMENT STANDARD ENTITLED “DIGITAL APPARATUS,” ICES-003
OF THE DEPARTMENT OF COMMUNICATIONS.
CETAPPAREIL NUMERIQUE RESPECTE LES LIMITES DE BRUITS RADIOELEC-
TRIQUES APPLICABLES AUX APPAREILS NUMERIQUES DE CLASSE B PRESCRITES
DANS LA NORME SUR LE MATERIEL BROUILLEUR: “APPAREILS NUMERIQUES,”
NMB-003 EDICTEE PAR LE MINISTRE DES COMMUNICATIONS.
CAUTION:
• Do not block the ventilation openings or holes.
(If the ventilation openings or holes are blocked by a newspaper or cloth, etc., the heat may not be
able to get out.)
• Do not place any naked flame sources, such as lighted candles, on the apparatus.
• When discarding batteries, environmental problems must be considered and local rules or laws
governing the disposal of these batteries must be followed strictly.
• Do not use this apparatus in a bathroom or places with water.Also do not place any containers filled
with water or liquids (such as cosmetics or medicines, flower vases, potted plants, cups, etc.) on top
of this apparatus.
ATTENTION:
• Ne bloquez pas es orifices ou es trous de ventilation.
(Si es orifices ou es trous de ventilation sont bloqués par un journal un tissu, etc., la chaleur peut ne
pasêtre évacuée correctement de l’appareil)
• Ne placez aucune source de flamme nue, telle qu’une bougie, sur l’appareil.
• Lors de la mise au rebut des piles, veuillez prendre en considération es problèmes de l’environnement
et suivre strictement les règles et les lois locales sur la mise au rebut des piles.
• N’utilisez pas cet appareil dans une salle de bain ou un autre endroit avec de l’eau.
• Ne placez aucune récipient contenant de l’ear (tel que des cosmétiques ou des médicaments, un vase de
fleurs, un pot de fleurs, une tasse, uec.) sur cet appareil.

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 1 Page 2
SECTION1. GENERALINFORMATION
1.1 INTRODUCTION
The RS16x16HB routing switcher is a device which accepts up to sixteen video
inputs and up to sixteen stereo audio inputs (that is, sixteen channels of left and right
audio), and connects any one of the input channels (buffered electrically) to one or
more of the sixteen outputs.
1.2 TECHNICALDESCRIPTION
The RS16x16HB uses a single chip microprocessor with backup battery to
drive three monolithic latching crosspoint decoders, one for video and one for
each channel of audio. The video channel features a driver stage with a gain of two
to drive a 75 ohm coaxial line. The audio is set up for high impedance balanced
inputs and outputs with a gain of one, or optional 600 Ohm balanced inputs and
outputs at up to +l6db.
Crosspoint information is collected by the microprocessor from either the front
panel keypad or from the RS232 port on the rear panel, and distributed to the
crosspoint decoders. Audio and video may be routed together or separately. The
microprocessor program activates an automatic lamp test at powerup or when the
lamptest is calledby front panelkeypad or RS232port. Eachtimea routingcommand
is sent, the entire current routing map can be reported on the RS232 port.
1.3 DETAILSPECIFICATIONS
VideoChannels
Levels: 1 v. composite picture video or black burst: with a variety of
lineresolutions including525,625,825,875, and1025, witha
variety of television systems including NTSC, PAL, SECAM,
and others
Frequency Response: DCto200MHz
@300mv,<-3dB@150MHz
@1.0v,<-3dB@ 115MHz
Input Impedance: 75ohm
Output Impedance: 75ohm
Crosstalk:
all hostile:
Typ <-70dB@ 5MHz
Typ <-55dB@20MHz
Typ<-25dB @100MHz
one hostile:
<-40dB@200MHz
AudioChannels,Unbalanced
Levels: 2 v. unbalanced audio, including
voice,music, PCM, controlrack, SMPTE
time code, and others
Frequency Response: 20Hzto30KHz
Input Impedance: l00Kohm
Output Impedance: 1Kohm
Crosstalk: less than -85db @ 1KHz
AudioChannels,Balanced
Hum and noise: <-90db
Frequency response: 20Hzto50KHz+A¼db
Level: 0, 4, or 16db, clipping at 18db
Impedance: Bridging,or 600ohm termination
Crosstalk: <-90db©20KHz
General
Connectors-Video: (32)BNC orRCA (asspecified)
Connectors-Audio: (64)RCA (unbalanced)
Phoenix screwtype, removable (balanced)
Power Consumption: nominal15vdc, 1.5A(from plug-
in module supplied)
Power Connector: 5mm/2mmcoaxial
Dimensions: 6Urack
19”wide x 10.5” high x 2” deep
Shipping Weight: 8 pounds

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 3 Page 4
SECTION2. INSTALLATION
WARNING!
Static Sensitive Connectors! During the installation process and whenever
changing cables to the Knox RS16x16HB inputs and outputs, use extreme caution
to avoid conducting static electricity to any inputs or outputs including video,
audio,and RS232.
DC Offset Warning! Connect standard video and audio inputs and outputs only.
Do not connect input or output signals with a positive or negative dc offset.
ChassisGround is Earth GroundDo not connect video or audio cables with
induced or direct-connection potential on the shield.
2.1 INTRODUCTION
Thissection provides theinformation requiredfor installation ofthe RS16x16HB
into its operating environment.
2.2 UNPACKINGANDINSPECTION
Unpack the RS16x16HB carefully and verify that the serial number matches the
number quoted on the packing list. Before installing it into a system, check the
outsideof the unitcarefully for signsof damage and check thatnone of thefasteners
have come loose.
Check that the power module is also present and marked for use with the
RS16x16HBproduct.
Units are shipped with a memory backup battery which retains the routing
crosspoint information when power is off. The battery is mounted on the printed
circuit board and is accessible from the rear panel. In the event that crosspoint
information is not retained during power off, the battery must be replaced. It is
recommended that the battery be replaced after five years. See Section 4,
Maintenance, for details on how to change the battery.
2.3 INSTALLATION
The RS16x16HB is designed to be mounted in a standard 19” rack panel; it is
10.5 inches, or six standard units, high.
Choose a space in the rack which is convenient for all the cables and mount the
unit using standard rack bolts. Connect the output of the RS16x16HB power unit to
the power connector at the right rear (as viewed from the back of the panel) of the
RS16x16HBand plugthe powerunit intoa groundedACpower outletof thevoltage
and frequency specified on the power unit. There is no power switch on the
RS16x16HB; it is designed to be ON at all times. (If it is desirable to have the
RS16x16HB powered down regularly, connect the power module to a switchable
AC power strip.)
2.4 VIDEOCONNECTIONS
Connect up to sixteen video sources (cameras, videocassette players, RF
demodulators, still-stores, character/graphics generators, etc.) to the input BNC
connectorsmarked VIDEOINPUT(or RCAconnectors, ifthey were specified).
Inputs are automatically terminated in 75 ohms. Terminate unused outputs in
75ohms.
Connect up to sixteen destination devices (monitors, VCRs, LCD projectors,
displays, RF modulators, etc.) to the sixteen BNC (or RCA) connectors marked
VIDEO OUTPUT. Be sure that all destination devices are terminated at 75 ohms.
Do not connect a SOURCE of video to any of the video OUTPUT connectors.
2.5 AUDIOCONNECTIONS
Connect up to sixteen audio sources (line level mikes, videocassette players, RF
demodulators, tape/CD players, etc.) to the left and right channel connectors marked
AUDIOINPUT.
Connect up to sixteen audio destination devices (amplifiers, VCRs, tape/CD
recorders, RF modulators, etc.) to the sixteen left and right channel connectors
markedAUDIOOUTPUT.
Do not connect a SOURCE of audio to any of the audio OUTPUT connectors.
For balanced audio units, the Phoenix connectors may be removed while
making the screw connections.
Wheninstalling balancedaudio connections,use thecenter pinfor the common
or ground wire. The top or bottom pin may be used for either +
or-, however the connections must be consistent throughout.
C
Phoenixconnector
for Balanced
Audio

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 5 Page 6
2.6 SETTINGTHEBAUDRATE
If the RS16x16HB is to be controlled through its RS232 port, it is important to
set the correct baud rate. One of four baud rates may be selected using positions 1
and 2 of the programming switch located on the rear panel of the RS16x16HB. Set
the switches as follows:
BAUDRATE
19200
1200
2400
9600
SWITCH1
ON
OFF
ON
OFF
SWITCH2
ON
ON
OFF
OFF
All Baud Rates are 8 bit, no parity, one stop bit. Switches are ON when
pushed up (as viewed from the back of the panel)
The switches are read by the microprocessor only at power-up; for switch
configuration changes to take effect, cycle the power input to the RS16x16HB.
1
ON
2345678
Figure2.1 BaudRateSetting
Switches 6-8 should always be off.
2.7 ANSWERBACKMODES
The user may choose between two modes of answerback: verbose and
nonverbose. Select the mode using position 3 of the programming switch located
onthe rear panelof theRS16x16HB.
Position 3 ON is verbose, while position 3 OFF is nonverbose.
The switches are read by the microprocessor only at power up; for switch
configuration changes to take effect, cycle the power input to the RS16x16HB.
In the verbose mode, each time a routing command is sent, the routing
map will be reported on the RS232 line.
OUTPUT1 Video3 Audio 1
OUTPUT2 Video2 Audio 2
OUTPUT3 Video1 Audio 3
OUTPUT4 Video6 Audio 6
OUTPUT5 Video7 Audio 7
OUTPUT6 Video8 Audio 8
OUTPUT7 Video5 Audio 1
OUTPUT8 Video4 Audio 1
OUTPUT9 Video3 Audio 1
OUTPUT10 Video2 Audio 2
OUTPUT11 Video1 Audio 3
OUTPUT12 Video 14 Audio 14
OUTPUT13 Video 15 Audio 15
OUTPUT14 Video 16 Audio 16
OUTPUT15 Video 16 Audio 16
OUTPUT16 Video 16 Audio 16
In the nonverbose mode, only the word DONE will be reported. In either
mode, an incorrect or meaningless command will cause the word ERROR to be
reported.
Figure2.2TypicalRoutingMap StatusReport

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 7 Page 8
2.8 KEYPADLOCKOUT
For security reasons it is sometimes desirable to lock out the front panel
keypad. To prevent the crosspoints from being changed by the front panel keypad,
put switch position 4 in the ON (up) position. Switches 6-8 should always be off.
The switches are read by the microprocessor only at power up. For switch
configurations to take effect, cycle the power input to the RS16x16HB.
2.9 BREAKAWAYAUDIOLOCKOUT
Sometimes it is desirable to disable breakwaway audio switching. Switch
position 5 on the rear panel is used to disable breakaway audio. Position 5 OFF
allows breakaway audio, while position 5 ON causes audio to always switch with
video.
2.10 REMOTEREADOUTOPTION
The remote readout option employs an internal character generator to produce
a routing map status report in monochrome video format, genlocked to video input
number 1. Connect a monitor to the Remote Readout connection on the rear panel
to view this display.
2.11 VERTICALINTERVALSWITCHING
Allunits are now fitted withthe verticalswitching option.Switching will occur
during the vertical interval, referencing the sync signal on input number one. If
input number one has no input, switching will be random with respect to sync.
Note: vertical interval switching has no meaning unless the inputs are synchronous
to one another.
SECTION3. OPERATION
3.1 INTRODUCTION
This section explains in detail the operation of the RS16x16HB using either the
front panel keypad or the RS232 port.
3.2 CONNECTIONS
Connect audio and video sources as described in sections 2.4 and 2.5. There is
no requirement that all inputs be used or terminated.
If outputs are left over they may be used like a distribution amplifier to buffer
and distribute an input signal. To use extra outputs in this way simply route the
input you wish to distribute to as many available outputs as desired.
Outputs may be looped back to unused inputs via short cables for the purpose
of adding delays, but be aware that if an output is then routed to that same input, an
illegal condition will exist and the output will oscillate at frequencies which could
spill over onto other crosspoints.
3.3 CONTROLVIATHEFRONTPANELSWITCHES
Switchposition 5 onthe rear panel is used to disable breakawayaudio. Position
5 OFF allows breakaway audio. Position 5 ON causes audio to always switch with
video. If position 5 is ON, disregard sections 3.3.1 and 3.3.2.
3.3.1 HOWTOROUTEAUDIOANDVIDEOTOGETHER
On the front panel keypad, push the B (Both) key, then a two-digit number for
the destination (output) you wish to route to, then a two-digit number for the
source (input) you wish to route from, then push ENter.
If you do not complete your entry within fifteen seconds, the keypad will
return to idle mode, waiting for you to begin a new command sequence.

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 9 Page 10
3.3.2 HOWTOROUTEVIDEOALONE
On the front panel keypad, push the V(Video) key, then a two-digit number for
the destination (output) you wish to route to, then a two-digit number for the
source (input) you wish to route from, then push ENter.
If you do not complete your entry within fifteen seconds, the keypad will
return to idle mode, waiting for you to begin a new command sequence.
3.3.3 HOWTOROUTEAUDIOALONE
On the front panel keypad, push theA(Audio) key, then a two-digit number for
the destination (output) you wish to route from, then a two-digit number for the
source (input) you wish to route from, then push ENter.
If you do not complete your entry within fifteen seconds, the keypad will
return to idle mode, waiting for you to begin a new command sequence.
3.3.4 HOWTOSTOREAND RECALLCROSSPOINT PATTERNS
The RS16x16HB has 16 stored routing map configuration memory locations.
These stored configurations are nonvolatile and are thus maintained during power
interruptions.
To STORE the currently loaded crosspoint pattern to one of the sixteen pattern
storage areas, push the S key, enter a number from 0l to 16, then push the ENter key.
To RECALL and load one of the sixteen stored crosspoint patterns from the
front panel keypad, push the R key, enter a number from 0l to 16, then push the
ENterkey.
3.3.5 HOWTOUSETHETIMEDSEQUENCER
The RS16x16HB can be set to cycle continuously through its sixteen stored
patterns on a timed basis. To set the time push the S key, enter 92 followed by a 2-
digitnumber from0l to99, thenpush theENter key.The2-digit numbercorresponds
approximately to the number of seconds between pattern changes.
To beginthe cycling,push theS key,enter thenumber 90, then push theENter key.
To end the cycling, push the S key, enter the number 91, then push the ENter key.
3.3.6 HOWTOTURNACROSSPOINTOFF
Sometimes it is useful to be able to disconnect a crosspoint altogether; that is,
have no input routed to a given output. To turn an output off, push a letter key (B
forboth,Aforaudio, orVfor video), then thetwo-digit output number,then 00, then
ENter. To turn the output back on, route any input to it in the usual way.
3.4 CONTROLVIATHERS232INPUT
A simple protocol allows all crosspoints to be set through the RS232 port. The
RS232 port will accept inputs from a terminal, computer, or other software-driven
controldevice.Nohandshaking is required.TheRS16x16HBRS232 Port isconfigured
as a DCE. The pin-out of this port allows connection to an PC or compatible 9 pin
serial COM Port with a 1:1 cable. (Data is sent from the router as pin 2. Data is
received by the router as pin 3. Pin 5 is ground.)
Note:in the followingcommandstheletters may beupperorlower case; (ENTER)
isthe sameas CarriageReturn (in hex,a 0D).Do notadd aLine Feed (in hex, 0A).
3.4.1 ROUTINGAUDIOANDVIDEO
To route video and audio send a six-byte command in the form:
Bxxyy(ENTER)
wherexxisanoutputnumber(01-16)andyyisan input number (01-16).
To route video alone send a six-byte command in the form:
Vxxyy(ENTER)
where xx is an output number and yy is an input number.
To route audio alone send a six-byte command in the form:
Axxyy(ENTER)
where xx is an output number and yy is an input number.

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 12
Page 11
To route both video and audio from different inputs, send an eight-byte
commandin the form: Bxxyyzz(ENTER)
where xx is an output number and yy is a video input number and zz is an audio
inputnumber.For example, B010203 sends videofrom input2 tooutput 1 and audio
from input 3 to output 1.
A crosspoint can be turned OFF by routing it to input zero; e.g. B0100 turns off
the video and audio to output 1.
3.4.2 SENDINGASALVOCOMMAND
It is possible to send the same input to a number of sequential outputs by a
single eight-byte command of the form:
Xmmnnoo(ENTER)
where mm is the first output number, nn is the last output number, and 00 is the
input number.
Using X as the first byte sends both video and audio to the range of outputs,
using Y sends video only, and using Z sends audio only.
For example, Y010408 sends the audio from input 8 to outputs 1 through 4.
3.4.3 SENDINGASTRINGOFCOMMANDSTOBE
EXECUTEDATTHESAMETIME
It is possible to send a set of commands to the routing switcher that will be held
until the final command is received, then all the commands are executed at the same
time. For all but the final command in the set use the form:
Exxyy(ENTER),
where xx is the output number and yy is the input number.
Using E as the first byte sends both video and audio from input yy to output xx,
using F sends video only, and using G sends audio only. The final command in the
set must start with the letter B, V, or A instead of E, F, or G. This final command
causesall the previous commands toTAKE.You may alsocause aTAKE by sending
thethree-byte commandEE(ENTER).
For example, the following commands sent over a period of time:
E0101(ENTER),E0202(ENTER),E0303(ENTER),B0404(ENTER)
will result in connecting input 1 to output 1, 2 to 2, 3 to 3, and 4 to 4 when the last
(ENTER)is received.
3.4.4 USINGCONFERENCEMODETOCROSS-CONNECTANINPUT
ANDANOUTPUT
It is possible to send a single command to cross-connect an input and an
output; for example, to connect input 1 to output 4 and input 4 to output 1. This is
useful in teleconferencing and similar applications. To cross-connect both video
and audio, send a six-byte command in the form:
Jxxyy(ENTER)
where xx is an output number and yy is an input number.Adding two more bytes at
the end
Jxxyyzz(ENTER)
will cross-connect the audio as well, such that video xx and yy are cross-connected,

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 13 Page 14
and audio xx and zz are cross-connected.
To cross-connect video only, send a six-byte command in the form:
Kxxyy(ENTER)
and to cross-connect audio only, send a six-byte command in the form:
Lxxyy(ENTER)
For example, K0113 connects video input 13 to output 1 and video input 1 to
output 13.
3.4.5 READINGSYSTEMSTATUS
The crosspoint status can be read from the RS232 port at any time by sending
the two-byte command:
D(ENTER)
The status report does not disturb the existing crosspoint pattern.
3.4.6 STORINGANDRECALLINGCROSSPOINTPATTERNS
To STORE the currently loaded crosspoint pattern to one of the sixteen pattern
storage areas, send the four-byte command:
Snn(ENTER),
where nn is a number from 0l to 16. The pattern stored in that memory area will be
overwritten with the current pattern.
To RECALL and load one of the sixteen crosspoint patterns from the battery
backed-up memory, send the four-byte command:
Rnn(ENTER),
where nn is a number from 0l to 16.
3.4.7 TIMEDSEQUENCER
The RS16x16HB can be set to cycle continuously through its sixteen stored
patterns on a timed basis. To set the time interval and start the cycling send the
four-byte command:
Tnnn(ENTER),
where nnn is a one- to three-digit number from 1 to 999.
To stop the cycling, send the two-byte command:
N(ENTER).

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Page 15 Page 16
3.4.8 LAMPTEST
The lamp test which occurs automatically on powerup can be initiated through
the RS232 port by sending the two-byte command:
T(ENTER).
The lamp test does not disturb the existing crosspoint pattern.
3.4.9 ANSWERBACKMODES
Theusermaychoose between twomodesofanswerback: verbose andnonverbose.
Selectthe modeusing position3 ofthe programmingswitch locatedon therear panelof
theRS16x16HB.Position3ONisverbose,while position3OFFisnonverbose.
In the verbose mode, each time a routing command is sent, the current routing map
willbereportedontheRS232linefollowedbythewordDONE.
The switches are read by the microprocessor only at power up; for switch
configurationchanges totake effect,cycle the powerinput tothe RS16x16HB.
SECTION4. MAINTENANCE
NOTE:Maintenanceof theRS16x16HB,exceptforchanging thebattery,
shouldbeperformedby qualifiedservicepeopleonly.
4.1 INTRODUCTION
The only routine maintenance the RS16x16HB requires is to change the
battery located at the rear of the RS16x16HB unit.
4.2 HOWTOCHANGETHEMEMORYBACKUPBATTERY
The RS16x16HBisshipped with a memorybackup battery which retains the
routing crosspoint information when power is off.The battery, approximately 1/2
inch in diameter, is mounted in a holder on the main printed circuit board. In the
event that crosspoint information is not retained during power off, the battery
must be replaced.
To change the battery, pry up the retaining bar gently and slip the old
battery out. Replace at least every five years with Knox part number 140896, or
commercialtypeDL1220.
4.3 SWITCHOPTIONS
An 8-position switch, accessible through the rear panel, is provided for
setting the baud rate and certain programming functions.
Switch positions 1 and 2 are used to set the baud rate for the RS232 control
port. One of four baud rates may be selected as follows:
BAUDRATE
19200
1200
2400
9600
SWITCH1
ON
OFF
ON
OFF
SWITCH2
ON
ON
OFF
OFF

KNOX VIDEO
RS16x16HB ROUTING SWITCHER KNOX VIDEO RS16x16HB ROUTING SWITCHER
Switch position 3 chooses between the verbose and nonverbose mode of operation
(see section 2.7). Position 3 ON is verbose, while position 3 OFF is nonverbose.
Switch position 4 is used to lock out the front panel keypad for security reasons.
Position 4 OFF allows keypad entry, while position 4 ON locks out keypad entry.
Switch position 5 is used to disable breakaway audio. Position 5 OFF allows
breakaway audio, while position 5 ON causes audio to always switch with video.
Switchpositions 6 through 8 arereserved forprogramming options not covered
here. Switches 6 through 8 should always be OFF.
Switches are ON when pushed up.
The switches are read by the microprocessor only at power-up; for switch
configuration changes to take effect, cycle the power input to the RS16x16HB.
1
ON
2345678
Figure4.1 BaudRateSetting
Page 17