Simplified Block Diagram; Ey 500 Transceiver, Simplified Block Diagram - Simrad EY500 Instruction Manual

A range of single-beam transducers is available for different frequencies.
Additionally, dedicated split-beam transducers are available for 38, 70 and
120 kHz for measuring target strength.
The minimum requirements for the PC to be used with the EY 500 transceiver
are listed under the Technical Specifications.
The EY 500 transceiver requires a supply voltage of 10 to 40 VDC and can be
powered from a battery or from an AC power source via an AC/DC converter.

1.2.4 Simplified block diagram

Figure 2 shows a simplified block diagram of the transceiver electronics.
The EY 500 transceiver unit comprises four printed circuit boards:
Analog
Transceiver
Trans-
ducer
Power
Shut-down
(CD473)
Figure 2 EY 500 transceiver, simplified block diagram.
C An analog transceiver module containing transmitter and receivers
C A digital transceiver module performing A/D-conversion, log. amplitude table
lookup and measurement of electrical phase (applies to split-beam operation
only).
C A PC interface module supporting transceiver and Centronics printer
interface.
Power unit
P3400/B
Digital
Transceiver
Power
Simrad EY 500
PC-
Interface
10 - 40V DC
PC
7