CommRadio CR-1a User Manual – Rev 1 Edition: 15 July 2015
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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 S/N’s 601-749 only.
•
LW-MW-HF Port: 50 Ohm – BNC (female)
•
VHF-UHF Port: 50 Ohm – BNC (female)
Display
•
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 CR-1a 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.
•
I-Q data and radio controls using:
o
CommRadio supplied basic 200 kHz Spectrum-Scope PC GUI (graphical-user-
interface).
o
Third party software GUIs (graphical-user-interface)
