CR-1A COMMUNICATIONS RECEIVER

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

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)

Display

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

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)

Mechanical:

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: