CommRadio CR-1a another SDR that looks interesting

CommRadio CR-1a another SDR that looks interesting…

 

2002lrg

 

I have never really spent much time on the Software Defined Radio arena, but the more I keep loo at them they are becoming so interesting. The CommRadio CR-1a communications receiver is a true SDR (software defined radio), but does not require a computer. Enjoy the benefits and performance of state-of-the-art SDR, but in a conventional radio package.

 

As much as I hate to say, it might be time for me to make a purchase and spend some time playing with these. I really like the size of the rig in comparison to the SunSDR2 (http://nicktoday.com/sunsdr2-sunsdr-mb1-transceivers-software-defined-radios/). Hard to tell until I see them both in person.

 

Here is a video I found and more information on other CommRadio CR-1a: http://youtu.be/hfZuZGmAJv4

 

 

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)

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 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)

Mechanical:

  • 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

 

Subscribe for free

Subscribe via email


Technology 4 Lives

RSS NickToday RSS Feed

  • Recon Extreme xtreme scanning LED Tailgate Light Bar Dodge Ram 2500 in action (HD 1080)
        As I have been feeling somewhat better I have been trying to knock out projects around the house and take care of other responsibilities, but I wanted to take some time to do another project on the truck and finally got to the Recon Extreme 60 inch lightbar on the back of the […]
  • Ram has new shoes
    Today I picked up the my Ram from the dealership, I had had the rims and tires ordered before Christmas, but do to some other issues and priories I had not had a chance to get them onto the truck. After looking for a while at several different options and what way I wanted to […]
  • Ram update – Antenna, SideBars, and Fenders
    Here is a quick update with of pictures with GoRhino Sidebars, Smitybuilt M1 Fenders and Ham Radio Antennas. I have a few more additions from Christmas that I need to install, but I wanted to provide some updated pictures.   The post Ram update – Antenna, SideBars, and Fenders appeared first on NickToday Blog.

Comments

  1. Johnd826 says

    Fantastic website. A lot of useful information here. I’m sending it to a few pals ans also sharing in delicious. And naturally, thank you in your sweat! gaeegbddgcbe

  2. says

    Hello my loved one! I want to say that this post is amazing, great
    written and include almost all significant infos.
    I’d like to see extra posts like this .

Trackbacks

Leave a Reply

Your email address will not be published. Required fields are marked *