AstroRadio SL


Receptor CR-1A SDR

Receptor CR-1A SDR

Wide Range Communications Receiver featuring

digital USB I-Q Output, EZ-Vue Amber Display,

Internal Li-Ion Rechargeable Battery, standard

mini-USB Interface Cable, 2.1mm plug unterminated

power cable, Printed User's Manual.


Frequency Coverage and Modes:


MW-HF: General Coverage: 500 kHz - 30.000 MHz

 User Configurable Band Key:

Amateur Band Selections:                  160 m – 10 m
International Broadcast Bands:           120 m – 11 m
AM-SSB-CW  manual or auto-mode selection (based on tuned frequency)
International Broadcasting: manual or auto-selection: 5 kHz steps
Automatic -Filter Width select with override (manual selection)
Tuning Resolution (cursor control): 1 MHz  / 100 -10 - 1 kHz  / 100  - 10 Hz
MDS (minimum discernible signal):  nominal -130 dBm in 500 Hz Bandwidth
LW: 150 - 500 kHz is included for experimental purposes.  See Hardware Limitations below.

VHF-UHF General Frequency Coverage and Performance:

VHF: Continuous Coverage:   64.0 - 260.0 MHz
UHF: Continuous Coverage: 437.0 - 512.0 MHz
FM Broadcast: nominal -88 dBm in 200 kHz bandwidth
VHF Sensitivity  108.0 - 150.0 MHz: nominal - 98 dBm (or better) for 12 dB SINAD, 15 kHz filter bandwidth (5 kHz deviation)
UHF Sensitivity: nominal -86  to-98 dBm for 12 dB SINAD, 15 kHz filter bandwidth (5 kHz deviation)
Standard frequency steps for each band

VHF-UHF Band Plan:

FM Broadcast: 87.7 - 107.9 - Monaural - 5 kHz audio bandwidth (76.0 MHz International)
Aircraft Bands: 108.000 - 136.975 MHz, AM auto-select -25 kHz channel steps
Amateur: 2 m, 1.25 m, 70 cm (upper portion starting @ 437.0 MHz). 
NBFM mode default with SSB-CW mode selects.
Marine & NOAA Weather Radio
Public Service: 137.0 - 225.0: 12.5 and 25 kHz steps.
FRS-GMRS 462 – 467 MHz ,  25 kHz Steps
General Coverage 467-512 MHz
Note: 6 m (54 MHz) is not available.

Receiver Architecture:

HF: Dual conversion (VHF-UHF: single conversion) with low -IF, I-Q digital sampling, 32-bit DSP with digital audio CODEC
DSP demodulation algorithms: DSB-AM, SSB, CW, WBFM, NBFM
User Selectable, DSP fixed bandwidth channel filtering selections

Audio System - Digital CODEC

Speaker Driver: 0.8 W into 8 Ohm load
Internal 2.5” diameter, mylar-cone communications grade speaker
External monaural speaker jack (3.5 mm stereo jack - back panel)
Headset Driver: 40 mW into 16 Ohms. (3.5 mm stereo jack - front panel).

Antenna Inputs

LW-MW-HF Port: 1000 Ohm – 3.5 mm jack – Retained S/N’s 601-749. Eliminated starting with S/N 750.
LW-MW-HF Port: 50 Ohm – BNC (female)
VHF-UHF Port:    50 Ohm – BNC (female)


1.5" diagonal - 64 x 128 OLED Display with EMI-filtered lens
Readable outdoors (not in direct sunlight) and manually dimmable

Power Supplies

Power Jacks: Powered-USB and 6-18 VDC (2.1mm diameter-center pin (+) x 5 mm diameter barrel)
Internal Lithium-Ion rechargeable battery 6-8 hour capacity with full speaker volume. 10-12 hours for headset and normal speaker volume.
Both supply inputs automatically charge the optional internal battery with the radio powered ON or OFF.

Power Consumption

< 1.0 Watt Headset and normal speaker volume
< 1.2 Watt maximum - full speaker volume

USB Mini-B 2.0 Jack

Automatically charges internal battery while maintaining maximum USB power use < 2.5 Watts
Software updates via 'Dropbox' with automated email notifications.
CR-1a Only: I-Q data and radio controls via USB port
CR-1a Only: CommRadio supplied basic 200 kHz Spectrum-Scope PC GUI (Graphical User Interface)


Overall Size: 5.65” W x 2.45” H x 6.10” D (including knobs, jacks , feet)
Weight: 1 lb. – 8 oz.
Knobs: Machined Aluminum – Black Anodized
Front Panel: Machined Aluminum – Powder Coated – Black Crackle.
Case: 20 Gauge Steel, Powder Coated – Black Crackle.

ESD Protection:  ESD Diodes on: Antenna port(s), Power Jacks, USB Port, Keys, and  Knobs

Hardware Design Limitations:

CR-1 only: The CR-1 is not controllable over USB.
CR-1 only:  Analog or digital IQ or IF signals are not ported to any connector.

LW (150 kHz - 480 kHz): Designed to tune down to 500 kHz.  The tuner is programmed to provide tuning to 150 kHz. However, there is no dedicated pre-selector in this range.  The IF is also in this range and signals from other bands can be heard. Performance is not guaranteed in this range and is provided for experimental purposes. Good performance has been reported from one CR-1 owner who uses an external LW pre-selector.

Regulatory Compliance:

FCC Mark  Declaration of Conformity - Part 15
CE Mark (Europe-elsewhere)
RoHS: No Pb (lead)

Origin & Warranty & Satisfaction Guarantee:

Designed and manufactured in USA
Limited 1 year warranty: parts, labor, workmanship

CR-1a Communications Receiver


Price: € 699.89      VAT included

Only in Spain Peninsula