User's Manual

APPLIED TECHNOLOGY SOLUTIONS, INC.
DOCUMENT: fcc1250MAN.wpd ISSUED:jan99 REVISED: (ORIGINAL) PAGE: 5
SECTION THREE
OPERATION
3.0 GENERAL
The Series 1250 Transmitters are one device in a family of devices designed to provide secure communications
and surveillance capabilities to law enforcement agencies. This section describes the operation of the Series 1250
Transmitters with the other units in the VPLPD System 1200.
3.1 SYSTEM 1200 COMPONENTS
The System 1200 components include the Model 1245 Monitor Station and the Model 1225 Hand-Held
Transceiver.
3.1.1 System Operation
The Series 1250 Transmitters are low power, LPI/LPD devices intended for body worn applications. The overall
system design provides for direct reception by the other System 1200 devices. Extended operating ranges can be attained
by using the Model 1240 Portable Repeater.
The Model 1245 Monitor Station is used to monitor and record all VPLPD transmissions including those from the
Series 1250 devices. The Model 1245 is a self contained unit including re-chargeable battery, recorder and integral receive
antennas. The unit is designed for unattended operation and is capable of receiving and recording with the case lid closed.
The Model 1245 is also equipped with speaker, line out and headphone capability to support active monitoring. With fully
charged battery, the Model 1245 supports an operating time (receiving and recording) in excess of 8 hours. The Model
1245 may also be powered and/or charged from AC mains or DC automobile power. An external receive antenna can be
used for improved performance.
The Model 1225 Hand Held Transceiver is similar in operation and use to typical walkie talkie style, PTT
transceivers. It provides user controls for channel selection, code selection, volume control and PTT.
3.2 PRIVACY CODES
The Series 1250 Transmitters contains non-volatile memory for the storage of the privacy keys. The keys are
loaded into memory using the Model 1260 key loader. If a keyed unit is lost or stolen, the keys in the remaining units can
be changed quickly to maintain the overall security. Code selection is made by turning the code select switch on the front
of the Series 1250 device.
Two code selections are available, Common (C) and Private (P). The C code is factory set on all units and provides
a common scrambler code for use during inter-agency operations. The P code is intended to be agency or group specific.
This code can be changed by the user. In operation, the System 1200 uses different codes for Channel A and Channel B
operation.
To load a P code into a Series 1200 device, first install the 1250 into the receptacle on the Series 1250-03 Key
Load Adapter and slip the retaining clip over the top of the 1250. Attach the Key Loader to the Key Load Adapter. Place
the On/Off Slide control on the adapter to the On position. The POWER indicator on the Model 1260 should light. Select
a code by rotating the KEY NUMBER thumb wheel switches on the Model 1260. (Selecting a code number above 300 will
result in an error indication on the Model 1260.) Depress the LOAD KEY button on the Model 1260 to download the
selected key. The KEY LOADED indicator should light, indicating that the new keys were successfully loaded into the