User's Manual

70-STR1700-000 Rev A.1 STR-1700 O&M Manual
1
SECTION 1 INTRODUCTION
The STR-1700 series of UHF/VHF radio product represents a state-of-the-art
communications line providing half-duplex audio to radio frequency (RF)
transmit and receive functions. Consisting of multiple models, the series
provides FM transceiver functions in the 140 to 162 MHz and 400 to 512 MHz
frequency bands. The design has been tailored towards narrowband data
telemetry applications requiring fast transmit/receive response times with
compact size and high reliability.
1.1 Scope
This manual describes the Summation Research, Incorporated STR-1700 series of
Land Mobile Radios. The manual includes specifications, design description,
installation, and operation instructions along with routine maintenance
requirements for the STR-1700.
1.2 Product Description
The STR-1700 is a modified version of a standard UHF/VHF radio product
produced by ICOM. The VHF versions of the radio incorporate the ICOM IC-F521
transceiver while the UHF version incorporate the IC-F610 or IC-F621. In
order to make the product more applicable for data communications functions,
the STR-1700 product line incorporates a custom front panel as depicted in the
following picture.
IC-F521/F610/F621 STR-1700
FIGURE 1-1 PRODUCT COMPARISON
The custom front panel replaces the normal operator oriented local
status/control interface and audio interface connector with a single DB-25
connector targeted for computer control. The DB-25 provides both the audio
interface and a strapping capability for frequency select. This feature is
incorporated via a custom printed circuit board (PCB) located within the STR-
1700 front panel known as an External Interface Card (EIC). The following
figure depicts this implementation.