Expert Electronics SunSDR2 DX - DAC OUT Low Power Output; ADC IN and RX OUT Connectors

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SunSDR2 DX User Manual

REAR PANEL DESCRIPTION

The DAC OUT does not have a constant voltage to control the TX mode, so it is necessary to

use an additional control line while you use the DAC OUT in the TX mode. For this you may use

any EXT CTRL key (more details in EXT CTRL devices ).

3.8 DAC OUT low power output

The DAC OUT is the transceiver's low-power output, which functions in the wide frequency

band. It could be used for connection of external power amplifiers, transverters and as a source

of measuring signal.

To use the DAC OUT enable it in the antenna switch .

DAC OUT output parameters:

Max output power: 10 mW

Frequency band: 0.1...150 MHz

Transmitted signal band: 20 kHz

Impedance: 50 Ohm

Signal level: +10 dBm (max)

3.9 ADC IN and RX OUT

The ADC IN connector is the direct receiver input, bypassing Band Pass Filters (BPFs). Use

the ADC IN for connection of RX antennas, transverters, additional BPFs, preamplifiers,

attenuators etc.

Note:

The signal from ADC IN connector goes directly to the ADC input and may be amplified by

the +10dB preamplifier, if you set it in the software.

ATT is disabled when you use ADC IN alone, without RX OUT.

When you select ADC IN in ExpertSDR2, A3 antenna input is still working and can pick up

some strong stations, A1 and A2 inputs are completely disabled.

Warning!

Maximum allowed signal level on the RX IN connector is 0.3V of the active

voltage (RMS). Do not exceed this level, it may result in the transceivers overload

and ADC fatal damage.

The RX OUT connector is the output of the transceivers receive path. When the ADC IN is

enabled, the signal received on the HF path from the active antenna input, goes to the RX OUT.

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