7.0
RECEIVER REMOTE CONTROL
7.1
INTRODUCTION
This chapter describes the RX-400A control interfaces and the associated command set.
All features of the Receiver are controllable through the interfaces. In addition, the
Ethernet interface provides audio streaming from the receiver to a RCU-400A Receiver
Control Unit or PC or any device that can process variable sample rate PCM data
delivered via UDP packets.
7.2
USB INTERFACE DESCRIPTION
The RX-400A Digital HF/VHF/UHF Receiver has the built-in capability of being controlled
remotely by a computer or other controller that is equipped with a USB interface or an
Ethernet port and capable of transmitting and receiving ASCII-standard encoded characters.
A baud rate hardware configuration can be selected via switches 2 and 3 of the
Configuration DIP switch.
The USB interface of the RX-400A is physically implemented on a rear panel standard
USB connector. This interface has a full duplex operation, meaning that it can transmit
and receive data simultaneously.
The baud rates are selectable via configuration dip switches SW2 and SW3. Refer to
Table 7-1.
Baud Rate
Sw1/Switch 2
Sw1/Switch3
1200
0
0
9600
0
1
19200
1
0
57600
default
1
1
Table 7-1 Baud Rate Switch Settings
The RX-400A is set up with a fixed data word frame format consisting of ten bits, and
comprised of the following:
•
one start bit,
•
an eight-bit character
•
no parity,
•
one stop bit
An example illustration of the fixed data word format is shown below.
Start
Bit
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Stop
Bit
PN 74446
7-1
