4.0
OPERATION
Since the RX-400A is intended for remote control, operation is limited to power
ON/OFF, audio volume control and viewing of status indicators. It is assumed the
Receiver will be connected to either a RCU-400A Receiver Control Unit or host PC using
the optional Graphical User Interface (GUI) software package. Connections are to be
made per paragraphs 3.5 and 3.6.
4.1
POWER ON/OFF
The Receiver power is turned ON by depressing the right side of the toggle switch
toward the front panel. A built-in red lamp will illuminate to indicate power has been
applied.
4.2
HEADPHONES VOLUME
The headset audio level may be adjusted by rotating the VOLUME control, minimum at
full CCW position, full volume at full CW position.
4.3
STATUS INDICATORS
Three LED indicators are provided to indicate the operating status of the Receiver. The
green DATA LED blinks or is on-steady when data is being transferred to/from the
Receiver to the RCU-400A Receiver Control Unit or host PC. The yellow LINK LED is on
when the link between the Receiver and an external device has been established. The
SRQ LED illuminates when service requests are received.
Refer to Figure 2-1 for the Receiver front panel component locations.
NOTES
1.Full receiver operation descriptions for Manual Tuning, F1-F2 Frequency Scan and
Memory Channel Scan modes as well as other control parameters such as Gain Control,
Squelch, Bandwidth, Detection Mode, BFO and AGC is provided in the RCU-400A
Receiver Control Unit User Manual
2. Directed Search, using host workstation loaded optional software package, provides
Mission Download capability via the RCU-400A Receiver Control Unit
PN 74446
4-1
