OPERATION SECTION

Operation Section || Maintenance Section || Serial Protocols

INTRODUCTION

This section explains in detail the operation of the RS16x16HB using either the front

Panel keypad or the RS232 port.

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.

CONTROL VIA THE FRONT PANEL SWITCHES

HOW TO ROUTE AUDIO AND VIDEO TOGETHER

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 the EN for 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.

HOW TO ROUTE VIDEO ALONE

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 the EN for 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.

HOW TO ROUTE AUDIO ALONE

On the front panel keypad, push the A (Audio) 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 the EN for 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.

HOW TO STORE AND RECALL CROSSPOINT PATTERNS

The RS16x16HB has 16 stored routing map configuration memory locations. These stored configurations are non-volatile 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 01 to 16, then push the EN 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 01 to 16, then push the EN key.

HOW TO USE THE TIMED SEQUENCER

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 01 to 99, then push the En key. The 2-digit number corresponds approximately to the number of seconds between pattern changes.

To begin the cycling, push the S key, enter the number 90, then push the EN key.

To end the cycling, push the S key, enter the number 91, then push the EN key.

HOW TO TURN A 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 then 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.

SERIAL PROTOCOLS

Operation Section || Maintenance Section || Serial Protocols

CONTROL VIA THE RS232 INPUT

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 RS232 Port is configured as a DCE. The pin-out of this port allows connection to an IBM-PC or compatible 9 pin serial COM Port with a 1:1 cable.

Pin connections for the DB9 are as follows:
Data is sent from the router on pin 2.
Data is received by the router on pin 3.
Pin 5 is ground.

ROUTING AUDIO AND VIDEO

To route video, send a six-byte command in the form:

Vxxyy (ENTER), where xx is an output number (01-16) and yy is an input number.

To route audio, send a six-byte command in the form:

Axxyy (ENTER), where xx is an output number (01-16) and yy is an input number.

To route both audio and video from the same input, send a six-byte command in the form:

Bxxyy (ENTER), where xx is an output number (01-16) and yy is an input number.

To route both audio and video from different inputs, send an eight-byte command in the form:

Bxxyyzz (ENTER), where xx is an output number (01-16), yy is a video input number, and zz is an audio input number.

A crosspoint can be turned off by routing it from input zero; e.g., B0100 [ENTER] turns output number 1 OFF.

SENDING A SALVO COMMAND

It is possible to send the same input to a number of sequential outputs by a single eight-byte command in the form Lmmnnoo [ENTER], where L is X for Both, Y for video only, or Z for audio only; mm is the first output, nn is the last output, and oo is the input number.

For example, X010408[ENTER] sends the audio and video from input 8 to outputs 1 through 4.

SENDING A STRING OF COMMANDS TO BE EXECUTED AT THE SAME TIME

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 Lmmnn[ENTER], where L is E for Both audio and video, F for video only, and G for audio only, m is the output number, and n is the input number. The final command must start with the letter B, V, or A instead of E, F, or G – or send the command EE to TAKE the string.

For example, the following commands sent over some period of the E0101[ENTER], E0202[ENTER], E0303[ENTER], B040[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.

READING SYSTEM STATUS

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.

STORING AND RECALLING CROSSPOINT 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 01 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 01 to 16.

TIMED SEQUENCER

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).

LAMP TEST

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.

ANSWERBACK MODES

The user may choose between two modes of answerback: verbose and non-verbose. Select the mode using position 3 of the programming switch located on the rear panel of the RS16x16HB. Position 3 ON is verbose, Position 3 OFF is non-verbose.

In the verbose mode, each time a routing command is sent, the current routing map will be reported on the RS232 line followed by the 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.

MAINTENANCE SECTION

Operation Section || Maintenance Section || Serial Protocols

Note: Maintenance of the RS16x16HB, except for changing the battery, should be performed by qualified service people only.

INTRODUCTION

The only routine maintenance the RS16x16HB requires is to change its battery located at the rear of the RS16x16HB unit.

HOW TO CHANGE THE MEMORY BACKUP BATTERY

The RS16x16HB is shipped with a memory backup battery which retains the routing crosspoint information when power is off. The battery may be built into the micro- processor chip, or mounted separately in a holder on the main printed circuit board. In the event that crosspoint information is not retained during power off, the battery, or the microprocessor itself, must be replaced.

If the battery is contained within the microprocessor chip visible in the cutout on the rear of the chassis (the chip should read DS5000, in part, in small print) the entire microprocessor chip will have to be changed when the battery fails. Change the chip (Knox part number 59646) by gently prying on each end with an integrated circuit removal tool, or small flat-bladed screwdriver.

If the battery is mounted separately it will be visible in the cutout on the rear of the chassis (approximately ½ inch in diameter). 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.

Do not attempt to charge the battery inside the chip. Instead, change the chip itself by prying up gently on each end with an integrated circuit removal tool, or a small flat-bladed screwdriver. Insert the new chip by noting the pin 1 position and aligning all pins carefully; only then should you push the chip into the socket, being sure it is well seated in the socket.

SWITCH OPTIONS

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:

Switch position 3 chooses between the verbose and non-verbose mode of operation (see section 2.7).

Position 3 ON is verbose, Position 3 OFF is non-verbose.

Switch position 4 is used to lock out the front panel keypad for security reasons.

Position 4 OFF allows keypad entry, position 4 ON locks out keypad entry.

Switch positions 5 through 8 are reserved for programming options not covered here. Switches 5 through 8 should always be OFF.

Switches are On when pushed up.

Battery

Backed-up

Microprocessor

Figure 4.1 Rear Panel Components

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.

Operation Section || Maintenance Section || Serial Protocols