Knox Video RS16x16HB User manual

Page 1 Page 2
KNOX VIDEO
RS16x16HB Routing Switcher
KNOX VIDEO
RS16x16HB Routing Switcher
SECTION 2. 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.
Chassis Ground is Earth Ground Do not connect video or audio cables with in-
duced or direct-connection potential on the shield.
2.1 INTRODUCTION
This section provides the information required for installation of the
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
outside of the unit carefully for signs of damage and check that none of the
fasteners have come loose.
Check that the power module is also present and marked for use with the
RS16x16HB product.
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, Mainte-
nance, 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
RS16x16HB and plug the power unit into a grounded AC power outlet of the
voltage 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
connectors marked VIDEO INPUT (or RCA connectors, if they were specified).
Inputs are automatically terminated in 75 ohms. Terminate unused outputs in
75 ohms.
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
marked AUDIO OUTPUT.
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.
When installing balanced audio connections, use the center pin for 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

Page 4
KNOX VIDEO
RS16x16HB Routing Switcher
Page 3
KNOX VIDEO
RS16x16HB Routing Switcher
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
Figure 2.1 Baud Rate Setting
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
on the rear panel of the RS16x16HB.
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.
OUTPUT 1 Video 3 Audio 1
OUTPUT 2 Video 2 Audio 2
OUTPUT 3 Video 1 Audio 3
OUTPUT 4 Video 6 Audio 6
OUTPUT 5 Video 7 Audio 7
OUTPUT 6 Video 8 Audio 8
OUTPUT 7 Video 5 Audio 1
OUTPUT 8 Video 4 Audio 1
OUTPUT 9 Video 3 Audio 1
OUTPUT 10 Video 2 Audio 2
OUTPUT 11 Video 1 Audio 3
OUTPUT 12 Video 14 Audio 14
OUTPUT 13 Video 15 Audio 15
OUTPUT 14 Video 16 Audio 16
OUTPUT 15 Video 16 Audio 16
OUTPUT 16 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 re-
ported.
Figure 2.2 Typical Routing Map Status Report

Page 5
KNOX VIDEO
RS16x16HB Routing Switcher
Page 6
KNOX VIDEO
RS16x16HB Routing Switcher
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
All units are now fitted with the vertical switching 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 synchro-
nous to one another.
SECTION 3. 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
Switch position 5 on the rear panel is used to disable breakaway audio.
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.

Page 7 Page 8
KNOX VIDEO
RS16x16HB Routing Switcher KNOX VIDEO RS16x16HB Routing Switcher
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 the A (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 HOWTO STORE AND 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
ENter key.
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-
digit number from 0l to 99, then push the ENter key. The 2-digit number corre-
sponds approximately to the number of seconds between pattern changes.
To begin the cycling, push the S key, enter the number 90, then push the ENter key.
To end the cycling, push the S key, enter the number 91, then push the ENter key.
3.3.6 HOWTO TURNA CROSSPOINT OFF
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
for both, A for audio, or V for video), then the two-digit output number, then 00,
then ENter. To turn the output back on, route any input to it in the usual way.
3.4 CONTROLVIA THE RS232INPUT
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
control device. No handshaking is required. The RS16x16HB RS232 Port is
configured 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 following commands the letters may be upper or lower case; (ENTER)
is the same as Carriage Return (in hex, a 0D). Do not add a Line Feed (in hex, 0A).
3.4.1 ROUTINGAUDIOANDVIDEO
To route video and audio send a six-byte command in the form:
Bxxyy(ENTER)
wherexx is an outputnumber(01-16) and yy isan 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.

Page 9 Page 10
KNOX VIDEO
RS16x16HB Routing Switcher KNOX VIDEO RS16x16HB Routing Switcher
To route both video and audio from different inputs, send an eight-byte
command in the form: Bxxyyzz(ENTER)
where xx is an output number and yy is a video input number and zz is an audio
input number. For example, B010203 sends video from input 2 to output 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 SENDINGASALVO COMMAND
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 SENDINGASTRING OF COMMANDSTOBE
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
causes all the previous commands to TAKE. You may also cause a TAKE by
sending the three-byte command EE(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 USINGCONFERENCEMODE TOCROSS-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,

Page 11 Page 12
KNOX VIDEO
RS16x16HB Routing Switcher
KNOX VIDEO
RS16x16HB Routing Switcher
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 STORINGANDRECALLINGCROSSPOINT PATTERNS
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).

Page 13 Page 14
KNOX VIDEO
RS16x16HB Routing Switcher
KNOX VIDEO
RS16x16HB Routing Switcher
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
The user may choose between two modes of answerback: verbose and
nonverbose. Select the mode using position 3 of the programming switch located on the
rear panel of the RS16x16HB. Position 3 ON is verbose, while position 3 OFF is
nonverbose.
In the verbose mode, each time a routing command is sent, the current routing map
willbereported on the RS232line followedbythe word DONE.
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.
SECTION 4. MAINTENANCE
NOTE:Maintenance ofthe RS16x16HB, except for changing the battery,
shouldbe performedby qualifiedservice peopleonly.
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 HOWTO CHANGETHEMEMORY BACKUPBATTERY
The RS16x16HBis shipped with a memory backup 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
commercial type DL1220.
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

Page 15
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.
Switch positions 6 through 8 are reserved for programming 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
Figure 4.1 Baud Rate Setting