AR-DV1 | AOR

AOR » AR-DV1

Wide-band SDR receiver, 0.1-1300 MHz coverage with no interruptions, all-mode including digital voice standard. The first software defined receiver of its kind in AOR production. Ideated in Japan, year of introduction 2015.

Reference market : ham-radio

General :
Frequency coverage 0.1000 ~ 1300.0000 MHz [1]
Modulation mode CW, SSB, AM, AM-S, FM, P25, dPMR, DMR, TETRA [4], NXDN, Digital-CR, D-Star, Alinco st., Yaesu st.
Tuning step 10 / 50 / 100 / 500Hz / 1 / 2 / 5 / 6.25 / 7.5 / 8.33 / 9 / 10 / 12.5 / 15 / 20 / 25 / 30 / 50 / 100 / 500 KHz
Receiver :
Sensitivity [2] FM 0.71 uV (0.53~18 MHz, 12dB SINAD)
0.32 uV (18~1300 MHz, 12dB SINAD)
Selectivity CW 0.2 / 0.5 KHz (-3dB)
SSB 1.8 / 2.6 KHz (-3dB)
AM 3.8 / 5.5 / 6 / 8 KHz (-3dB)
AM-S 3.8 / 5.5 (-3dB)
FM 6 / 15 / 30 KHz (-3dB)
WFM 100 / 200 KHz (-3dB)
AGC Adjustable
Frequency stability ± 2.5ppm with temperature from 0°C to +50°C after 5' warm-up
Intermediate frequency [3] 393 MHz (18~180 MHz)
1705 MHz (180~1300 MHz)
31 MHz (18~180 MHz)
393 MHz (180~1300 MHz)
31 MHz (180~1300 MHz)
Features :
Memory 2000 regular memories in 40 banks
3 VFO
Display LCD
Antenna BNC 50Ω connector
Power supply 10.8 ~ 16 VDC external, 12 V nominal
Power consumption 750 mA
Audio power 1 W with an 8Ω load
Audio output Jack 3.5 mm headphone
Jack 3.5 mm external speaker
Jack 3.5 mm FM discriminator
Connections Micro-USB
Mechanical and environmental data :
Operating temperature from 0°C to +50°C
Dimensions 178 (W) x 50 (H) x 215 (D) mm
Weight 1.5kg

[1] Specifications not guaranteed in 0.1~0.53 MHz range, cellular blocked in the US
[2] Values not referenced to specific bandwidth
[3] Direct sampling architecture in 0.1~18 MHz range, without IF conversions
[4] TETRA mode was added in the AR-DV1 production after a certain date

Description :

The AR-DV1 is among the first receiver to offer a variety of digital formats demodulation in the hobby equipment, in addition to the usual analogue modes such as SSB, AM and FM. It is therefore a product that makes listening potential in areas that were previously not very accessible, a decisive advance step. On the technological side this AOR uses a conventional frequency conversion (super-heterodyne) structure when the interval between 18~1300 MHz is tuned while it is direct-conversion (SDR) for the range between 100 KHz and 18 MHz. Specifically for emissions on VLF and HF bands, the AR-DV1 integrates signal processing functions thanks to which it is possible to optimize the monitoring of a spectrum typically conditioned by interference and fading. Among these functions the auto-notch, the filter that automatically detects and attenuates the discrete components present in the audio, and the adaptive noise-reduction (NR) for the AM and SSB modes. Another control that becomes appreciable when listening below 30 MHz concerns the AGC which can be set to act with slow, medium or fast time constant as well as manually adjusted by the RF-gain command. Synchronous demodulation (AM-S), with selection of the lower side band (SAL) or higher side band (SAH), is available to improve the fruition of AM broadcasting stations.

Remarkable capabilities for the VHF / UHF segment, among them to remain in analogue modes: audio band reversal voice-descrambler set between 2000~7000 Hz in steps of 10 Hz. Squelch that can be adjusted to the noise threshold, on a certain signal level, on the presence of audio, or even unlocked in presence of specific tones in the DCS (Digital Coded Squelch) and CTSS (Continuous Tone Controlled Squelch System) standards. Setting an offset to quickly tune in / out the radio-repeater. Multiple, and complete, tuning steps including the 8.333 KHz step used in the aeronautical band. Medium frequency bandwidths (IF) suitable for all conditions including 30 KHz useful for receiving SAT weather signals on VHF. Audio output directly from the FM discriminator for the acquisition of data flows.

The AOR has developed the ARDV1 thinking to digital standards that are consolidating in radio communications. In this context, the receiver offers the decoding of the major systems used in ham-radio and in the private / professional PMR sectors. The table below shows the different operating modes and associated variants supported.

Digital mode Mode variant Encoding Compatible vocoder
ALINCO DIGITAL (EJ-47) Voice mode   AMBE
DIGITAL CR   Non encrypted AMBE+2
DMR TIER 1 and TIER 2 Non encrypted AMBE+2
dPMR dPMR446 and TIER 1   AMBE+2
D-STAR     AMBE
NXDN Regular mode Non encrypted or scrambling (15 Bit) AMBE+2
P25 PHASE 1 Non encrypted IMBE
TETRA Mobile-mobile Non encrypted  
YAESU DIGITAL V/D mode   AMBE+2

It should be noted that these modes concern communications encoded in digital data streams but transmitted without the intervention of speech encryption algorithms which would naturally require dedicated decoding keys. Other general functions: digital audio recorder in WAV format based on SD / SDHC card with a typical 7 hours duration for 1 GB. Timer for alarm and unattended recording, auto-off timer at 30, 60, 90, 120 minutes. USB interface for PC control and internal firmware update. Various scanning functions between frequencies, memories, priority channel. Memory banks with 2000 locations, possibility to identify each one with a text up to 12 characters.

Performance and practical notes :

AR-DV1 concentrates in itself many functions. It should be clarified that the main vocation is to refer to the advanced scanner that places in the hands of the user a versatile receiver and at the same time able to deal with the bounds of radio. The field of play therefore sees in the foreground the VHF and the UHF, just in this scenario it is worth mentioning a couple of aspects as examples of the project philosophy. On the one hand, a frequency conversion scheme that sees a 1st IF at 1.7 GHz with the intent, substantially successful, of minimizing the problems due to the image frequencies - an element that certainly has a negative impact on many other scanner models. On the other hand, finally opening the doors to the monitoring of free digital communications, the compatibility with the dPMR-446 standard or the counterpart of the popular 446 MHz analogue PMRs is a tangible proof. On the side of the long, medium and short waves, the considerations are necessarily directed on a different plane. The performances are still noticeable thanks to the possibility of selecting between different bandwidths for each modulation class - to mention one of the relevant features - but the many functions (AGC, notch, NR, IF) concentrated on a limited set of buttons / knobs make the ergonomics not ideal.

Valuation :

Sensitivity
Selectivity
Dynamic range
Spurious response
Audio
Signal functions
Control functions
User friendly

Stars: 1=insufficient, 2=just sufficient, 3=mediocre, 4=good, 5=excellent

Review :

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