User's Manual

RTR-4 Operator’s Manual
120300 Rev. D SAIC Proprietary 5-3
• The gray Power Transceiver-to-Imager cable for
imager-to-x-ray-source communications
The chassis houses all the active components, the battery, the
imager-to-controller transceiver, and the x-ray transmitter.
Antenna 1 provides signals for communication with the
controller; Antenna 2 provides signals to the X-ray Source
Receiver. The blue cable provides communication to the imager,
and the gray cable (with one red strain relief and one yellow)
provides communication from the imager for x-ray firing
purposes.
The Power Transceiver has a convenient briefcase-style handle
and contains a 10.8-Volt smart battery that is the same type as
provided with the CU-4 controllers. This battery can be recharged
using either the single-slot or the dual-slot charger sometimes
provided with the RTR-4 controllers, or in the RTR-4 CU-4
controller's battery compartment. The Power Transceiver also
has a power switch and a power-indication LED as shown in
Figure 5-2. The battery is in use whenever the power switch is on
and the LED is illuminated. (Early versions have a red LED; later
versions have a green LED.)
Radio-frequency communications between the Imager and the
Controller combined with the radio-frequency communications
with the X-ray Source Receiver are very low intensity. When the
Power Transceiver is more than 50cm (1.5 feet) away from a
target device, then the RTR-4 Wireless Option complies with
HERO specifications. (If the RTR-4 is not being used with
potentially-explosive devices, then this specification is
irrelevant.)
The transmission frequency of the Power Transceiver when
communicating with the imager is near 2.4GHz. This
communication is done between 2.4000 and 2.4835GHz, is
spread-spectrum and frequency-hopping, according to the
IEEE-802.11b-1999 standard, and is further encrypted to
minimize snooping or spoofing. The frequency used when
transmitting to the X-ray Receiver is about 418MHz, is very low
power and is coded with a sequencing 64-bit security code to
minimize the possibility of unintended source firing.
Externally Mounted X-ray Source Receiver Unit
The X-ray Source Receiver unit receives a signal from the Power
Transceiver and fires the x-ray source. A detachable cable can
connect to any of the four x-ray sources manufactured by Golden
Engineering. A strip of velcro is used to attach the receiver unit to
the X-ray source unit.