DESCRIPTION
The DVS702 DATA A/B SWITCH is a high isolation high frequency relay used to switch digital
signals such as SMPTE 310 and (SDTV) 270Mb signals. The switch has two inputs and one output in
an A/B configuration. The switching function is controlled by an external switch contact, RS232, or TTL
type signal. There are no active elements in the data path to degrade the signal, and if a power failure
occurs the data from the A channel will not be interrupted.
The unit comes equipped with a front panel selector switch. The operator can select the data
switch to Channel A, Channel B, or Remote operation. When the front panel switch is in the Remote
operation position, the unit is controlled by an external input signal. There is a "C" form relay output to
report the position of the A/B switch for remote telemetry.
The unit has BNC female connectors for the data inputs and output and a removable screw
terminal connector for the power and control signals. The switch is housed in a sturdy aluminum die
cast box which is completely RF shielded. The box can be mounted in the front or rear of your rack
with the standard side mounting bracket.
The unit can be used to engage a hot standby digital source or to put up a test pattern when
main data fails. This system will maintain your video data integrity and reduce trouble calls. It can also
be used where unattended video switching must occur.
FEATURES
Features of the DVS702 include a front panel three position command switch which is used to
manually force either the primary (A) data channel, secondary (B) data channel, or (REM) remote
external for unattended command and control.
The unit has front panel LEDs that indicate the status of the data switch. A Green LED
indicates the switch is in the (A) channel position, another Green LED indicates when the switch is in
the (B) channel position.
Standard BNC female connectors are used for the data inputs and the common output, and a
plug-in style removable screw terminal connector is used for the power and status output relay
contacts. This removable screw terminal plug can be pre-wired to reduce your installation time.
This switcher is housed in a sturdy aluminum die cast box which is completely RF shielded.
The box can be mounted in the front or rear of your rack with the standard mounting bracket. An
optional 19" mounting bracket is available. The ordering part number is PMS700-5A. It holds 5 units
and has a common wall mount power supply to power all 5 units. When using the PMS700-5A you
must use right angle BNC adaptors to make the abrupt turn to the rear of the unit for cables to route
without kinking.
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