LNR LD5 DSP-SDR, Quick Manual Manual, Page: 2 / 18

© 2014 LNR Precision Par EndFedz Antennas and QRP Transceivers
Quick guide manual
Description:
At the development base of the digital signal processing unit, an algorithm is embedded for IQ processing of
the channels with phase suppression of the unwanted side-band channel.
Unit CPU \ DSP performs the following functions:
 -------------------------------------------------- -------------------------------
 Digital signal processing
 Frequency synthesizer
 Full control of the transceiver with direct conversion / SDR /
Applicaton:
Due to its small dimensions and light weight this transceiver is suitable for any portable or stationary
operation.
This unit contains:
 -CPU STM32F407,
 -NS -24 bit ADC PCM1803,
 -NS -16 bit DAC CS4338 low hissing amp
 -HF-generator Si570
 -1602-line LCD
 -Matrix of buttons
 -Encoder
The unit has electronic CW Iambic key, SWR meter and output power wattmeter.
Functions that this unit performs are separate and switchable for reception / transmission.
They are displayed on the screen display as RX / TX with symbols.
The LD5 is capable of firmware update via USB port. See LNR web page for instructions.
How to order:
LNR Website www.LNRprecision.com
Features

Emmision Modes: SSB, CW , DIGITAL

5W output power typ.

Very low noise floor due to DDC input stage

The unit has an electronic CW Iambic A/B keyer,
SWR meter and output power wattmeter.

High stability Si 570 generator

Split-frequency operation

PTT can be switched by connecting PTT to ground

RX/TX switching:
o
push PTT input to ground
o
AF VOX

Output SWR indicator

Optimal output power indicator

Integrated Sequencer

TX 3 band EQ – presets for bass, middle and treble
boost