Knox Video RS4x4HB - Manual (Page 9)

KNOX VIDEO
RS4x4HB ROUTING SWITCHER KNOX VIDEO
RS4x4HB ROUTING SWITCHER
Page 13 Page 14
OUTPUT 1 Video 3 Audio 1
OUTPUT 2 Video 2 Audio 2
OUTPUT 3 Video 1 Audio 3
OUTPUT 4 Video 2 Audio 4
In the non-verbose mode only the word DONE will be reported.
In either mode, an incorrect or meaningless command will cause the word
ERROR to be reported.
3.5 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 RS4x4HB. Position 3 ON is verbose, while 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 RS4x4HB.
3.6 READING SYSTEM STATUS
The crosspoint status can be read from the RS232 port at any time by
sending the two-byte command:
D(ENTER)
A condensed version of the status can be read by sending:
D0(ENTER)
The status report does not disturb the existing crosspoint pattern.
SECTION 4. MAINTENANCE
NOTE: Maintenance of the RS4x4HB, except for changing the battery,
should be performed by qualified service people only.
4.1 INTRODUCTION
The only routine maintenance the RS4x4HB requires is to change the battery
located at the rear of the RS4x4HB unit.
4.2 HOW TO CHANGE THE MEMORY BACKUP BATTERY
The RS4x4HB is 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 DL1 220.
4.3 SETTING THE BAUD RATE
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, while position 3 OFF is non-
verbose.
Switch position 4 is used to disable the timed sequencer (see section 3.3.4).
Position 4 ON disables the timed sequencer.
Switch position 5 is used to disable the breakaway audio feature (see section
2.9). Position 5 ON disables the breakaway audio feature.
BAUD RATE
19200
1200
2400
9600
SWITCH 1
ON
OFF
ON
OFF
SWITCH 2
ON
ON
OFF
OFF
Figure 3.1 Typical Routing Map Status Report