User's Manual

Introduction
Crescendo UHF Half-Duplex User Manual Page 6 of 78
1. Introduction
Crescendo is a series of data-driven and packet-driven radio modems for high-speed data applications.
This manual is specific to Crescendo UHF Half-Duplex. Some of the relevant features of this model include:
 UHF band operation (390 MHz - 500 MHz), with
approximately 20 MHz switching bandwidth (model
specific).
 5 W (+ 37 dBm) maximum transmit power
 Wideband or narrowband channels, with software
selectable frequency raster
 Raw air rate 19.2 kbit/s (wideband) or 9.6 kbit/s
(narrowband)
 Half-duplex data-driven or packet-driven operation with
Automatic Repeat Request (ARQ)
 Windows GUI for configuration and diagnostics
(Cruise Control)
 Internal configuration menu with diagnostic and
statistical information
 LED front panel user interface
 Two RS-232 serial ports (main and auxiliary)
 Operating voltage 9 to 16 VDC
 Type Approvals:
 AS-4295
 FCC
 Industry Canada
 ETSI (planned)
 Integrated I/O module (model specific)
Channels
Channel width
(Channel spacing)
Occupied
bandwidth
Narrowband
12.5 kHz
< 7.25 kHz
Wideband
25 kHz
< 10.7 kHz
Table 1: Channel width