GENERAL INFORMATION

Technology

SDR

Direct Digital Conversion

Frequency/ Bands

High-Performance

HF Ham Bands

1.8 to 70.50 MHz

(Not General Coverage)

The ALT-512 is optimized for

'Ham Band Performance' and has

dedicated Bandpass Filters (BPF)

for the HF Ham Bands.

There is not enough room in

the tiny box for additional filters required to cover the

entire HF spectrum.

Transceive:

• 160, 80, 60, 40, 30, 20, 17, 15, 12, 10, 6, 4m

Receive-Only:

• 100 kHz to 1800 kHz
• 27.000 to 28.000 MHz
• US: 4m – receive only

Transverters option:

144 and 432 MHz with 28 MHz IF – drive level 150mW; TRUE FREQUENCY READOUT on 2m and 70cm by setting the frequency shift in menu #36 (Shift VFO)

MODES

CW, USB, LSB, DIGI, AM, FM

CAT: USB2 (FTDI)

Digital Modes

FT4, FТ8, JT65, PSK, RTTY, SSTV

(Requires Software App)

Output Power

5 to 10 W  typical            (varies from band to bands)

High-SWR Protection

(foldback power)

Antenna Impedance

50 ohms  (nominal)

BNC connector

DC Power Supply

From 10.5 V  to  13.6V d.c.

(recomended 12.6V)

Fuse: 3.15A, 250V, slow blow

Power

Consumption

RX HF Bands:  ca. 390mA  

RX VHF Bands: ca. 500mA

TX:  up to 2.5A

Frequency stability

±3 ppm

0 to 50 C°

Memory

100 channels (0-99)

Stores: Frequency, Mode, VFO (A/B) and more

Speaker

0.5 W

 built-in

Panoramic Bandscope   and Waterfall

Active on RX and TX / Adjustable Color Display

Enclosure size

12.8 x 10.7 x 5.5 cm

(w.o. knobs and connectors)

Working size

14.7 x 10.7 x 7 cm

(with knobs and connectors)

Weight

580 grams (20.5 oz.)

(without microphone)

RECEIVER

Technology

SDR

(CPU digital delay 21ms)

Direct Digital Conversion

Sensitivity

0.2 Uv/13dB s/n

Preamp ON

Preamplifier

+20 dB

Attenuator

-12 dB

Preliminary Filtering

9 BPF and 8 LPF

160m, 80m, 60+40m, 30+20m, 17+15m, 12+10m, 6, 4m,          

+ 100 to 1800kHz

Consumption

Average 350mA

Bandscope and Waterfall

Bandwidth: 48kHz

Toggles with[PAN] Button  

Front Panel or Menu Adjustments

DSP RX filters

4 DSP Filters per Mode

See Below

SSB Filters

4 DSP Filters per Mode

 Fil-1, Fil-2, Fil-3, Fil-4

(User Adjustable)

200Hz to 4.4kHz

CW Filters

20 Hz to 1kHz

AM Filters

2kHz to 12kHz

FM Filters

2kHz to 12kHz

Digital Modes Filters

4 Fixed Bandwith

 Fil-1:   4Khz / 250 - 4250Hz

 Fil-2:   2KHz / 250 - 2250 Hz

 Fil-3:   1KHz / 500 - 1500Hz

 Fil-4:  500hz / 500 - 1000Hz

Noise Reduction (NR)

Front Panel or Menu Adjustable

Noise Blanker (NB)

Front Panel or Menu Adjustable

NOTCH FILTER (NF)

Active only in SSB mode. 

Front panel or Menu Adjustable

S-Meter

Bar Graph in S-Units              

+ Digital Display

CW Mode

CW or CWR (Reverse)

Selectable with Mode Button

SQUELCH

Front Panel Button

Type: ‘SSB/AM’ or ‘FM’; Adjustable Level from 0 to 100    

IF – Virtual Intermediate Frequency

When ON, DSP is operating normal;  When OFF– the radio operates as a normal Direct Conversion Receiver.

Software MENU Selection

Must always be ON.

Sound Card for DIGI MODE

AUDIO CODEC PCM2904  

Implemented for all operating systems: WIN, LINUX, & MAC.  No additional driver required.

TRANSMITTER

 POWER

5  to 10 Watts - average, band-dependent;  front panel or software menu adjustment

Automatic SWR Protection

 Metering on Transmit

Selectable: Output Power, SWR, Mic Gain, ALC

Display: either bar graph    or digital (numeric)

 Metering DC voltage  

Numeric or Digital

 VOX SSB

Adjustable Gain and Delay

 Speech Compressor

Adjustable in Menu

“CMR” in menu

 Reverb

Adjustable in Menu

“ECHO” in menu

 TX Мute /Monitor/

Monitor for voice modes (SSB, AM, FM) and DIGI

 CW Key Type

Selectable: Paddle or Straight Key

 Built-in Auto Keyer

Iambic A/B

Default: В

 Auto Key Settings

Speed - MENU NR.04/

Dot/Dash Ratio - MENU NR.05

MENU selectable

 CW VOX

Delay Adjustable

From 100ms to 5 Seconds in 100ms steps.

 DIGI Level                    Adjustment

Adjusts Audio Level on Transmit in DIGI Mode

Front panel adjustment

  Ext. Amp Control (PTT)

Controls external amplifier with hang-delay in steps of 50ms.

Open Collector Switching

TX DSP filters

Two modes of operation

Default or User Definable

• SSB TX filters

Default : 2.800 kHz

Bandwidth:  750Hz to 4.15kHz

 Passband:    250Hz to 4.4kHz

  (adjustable)

• CW TX filters

Default: 100 Hz

Fixed:  100Hz

• AM TX filters

Default: 5.590 kHz

2kHz to 10kHz

• FM TX filters

Default: 9.600 kHz

2kHz to 10kHz

DIGI TX filters

Default: 4.000 kHz

Fixed:  4kHZ

 TX Bandscope or

        Waterfall

Monitors Transmited Signal

Push PAN button briefly to toggle the monitor mode between Bandscope or Waterfall

SOUND CARD FOR DIGI MODE

AUDIO CODEC PCM2902/4  

Implemented for all operating systems:     WIN, LINUX, & MAC.  No additional driver required.