PS009900 Operation Manual Rev C Page 4
Overview
The PS009900 is designed to be inserted between a single channel 5 watt radio and an
antenna to provide performance enhancement. It amplifies a 5 watt signal from the
radio output to a 30 watt signal available to the antenna in the 896-898 MHz frequency
band. It contains a passive receive path for pass through of signals in the 935-938 MHz
frequency band. The unit operates from a nominal +12 VDC supply, requiring 7.5 amps
at 30 watts of output. Transmit is enabled with a logic controlled Push-to-Talk (PTT)
signal. The unit is passively cooled and is suitable for intermittent transmit operation to
20% duty cycle.
RF signal connection is through SMA (F) connectors. Supply voltage and PTT signal are
applied through a 9 pin D-Subminiature E Shell connector. The unit’s physical
dimensions are 5.8”x4.0”x1.6”. The amplifier may be attached to a user supplied
assembly using the integral 6-32 threaded mounting locations and suitable hardware
(not supplied).
WARNING
This amplifier is not configured for “hot switching”. PTT must not be engaged with the
radio transmit signal connected and transmit power from the radio or signal source
applied. Enabling the PTT logic with RF transmit signal applied my permanently
damage the amplifier.
WARNING
Avoid operating the amplifier without properly terminating the antenna port with an
antenna or a suitable dummy load.
Interconnection
The PS009900 is intended for use as part of system to augment the transmit performance
of lower power radios. Specific implementation requires system knowledge regarding
the appropriate power levels to be used in the implementation. Consult manuals for
the radio and antenna to be used prior to installation.
The PS009900 should be connected to the system as shown in Figure 3 - Interconnection
Block Diagram. High quality 50 ohm coaxial cables should be used for interconnection
between the radio, the amplifier and the antenna. The DC supply, return, PTT control
and return should be connected from the bias supply and controller, respectively, using
signal wire gauge appropriate to the amperage and wire length. Verify the wire
connections and pin configuration. The PTT control/Bias D connector shell should be
secured to the amplifier using appropriate hardware.
WARNING
