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CORNERSTONE SMR INCORPORATED

ESP604

SEA proves to be the unquestioned leader in narrowband technology, with the introduction of a new low cost, small size, DSP-based mobile radio.

  • Trunked Operation
  • Conventional Operation
  • 4 Modes
  • Front Firing Speaker
  • Repeater Talkaround
  • Rugged Compact Design
  • Excellent Audio Quality
  • 20 Watts RF Power
  • Flash Programming
  • Synthesized
  • Easy to Operate
SEA's new voice and data capable dispatch radio meets the demanding requirements of today's radio system operators and users. The ESP604 is an affordable, durable, and easy-to-use mobile transceiver, and its compact size supports a variety of installations in today's small vehicle compartments.

The ESP604 uses the LTR® trunking protocol, offering maximum communications efficiency and service. The radio features separate priority, block and data ID codes, horn alert, free system ringback, transpond, and TX inhibit. In addition, the ESP604 is equipped with flash programmable memory, permitting convenient operating system upgrades via the microphone jack.

Data-Ready Options
The optional data interface boards allow integration with a variety of data devices including mobile data terminals, AVL equipment, and personal computers. One version also permits the use of high-speed modems. The ESP604 can operate on dedicated data or data and voice systems, and supports an ARQ mode on LTR® systems. Data option boards can be installed in the field.

DataManagerTM 600 EEPROM Memory Programming
The ESP604 personality data is programmed into EEPROM by shop technicians using the DataManagerTM 600, interface cable adapter, and a personal computer. Radios can be programmed for new features, sites, or IDs in the field. The DataManager facilitates in-vehicle diagnostic and tuning procedures as well. The DataManager supports programming of microphone sensitivity, power out, and master oscillator.
* ESP is a registered trademark of SEA Inc.
* LTR is a registered trademark of the EF Johnson Co., a division of Transcrypt Int'l.

SEA ESP604
SPECIFICATIONS

GENERAL
Frequency Range: TX: 220-222 MHz
RX: 220-221 MHz
Channel Spacing: 5 kHz
Modes: 4
Dimensions (HxWxD): in: 2.0 x 6.9 x 7.3
mm: 51 x 175 x 185
Weight: lbs: 3.25
kg: 1.47
Temperature Range: -30°C to +60°C
Input Voltage: 13.6 VDC (negative ground)
Current Drain: Transmit: 3.0 A average speech
Receive: 1.0 A
Standby: 550 mA
Antenna Connector: Mini UHF
FCC Type Acceptance ID: BZ68RIESP604
FCC Compliance: Parts 15 and 90
 
RECEIVER
Sensitivity: 12 dB SINAD <0.35 uV
Adjacent Channel Rejection (5 kHz): >53 dB (@±5kHz)
Spurious and Image Rejection: >70 dB
Intermodulation Rejection: >70 dB
Audio Output Power: 4 Watts @ 3.2 ohms
Audio Distortion: <5%
Input Impedance: 50 ohms
 
TRANSMITTER
RF Power Output: 20 Watts Peak Envelope Power
Frequency Stability: ±1.5 ppm*
Spurious & Harmonic Emissions: >70 dB
FM Hum & Noise: -38 dB
Emission Designator: 4K00J3E, 4K00J2D
Audio Distortion (@ 1 kHz): <5%
Output Impedance: 50 ohms
* synchronization to ESP1000 base station achieves ±0.25 ppm
 
Specifications subject to change without notice or obligation.