®		AOR (UK) Ltd
			Unit 9, Dimple Road Business Centre, Matlock, Derbyshire DE4 3JX, England Tel: +44 (0) 1629 581222  Fax: +44 (0) 1629 580070

AR7030 Technical Specification

1. Receiver system

• Dual conversion superheterodyne system with intermediate frequencies of 45MHz and 455kHz.

• High dynamic range mixer using a DMOS lateral FET quad.

• Tuning by single loop PLL / DDS system from a TCXO reference.

• All receiver functions under microprocessor control.

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2. Reception and Tuning

• Tuning continuous from 0 to 32MHz in 2.655Hz steps (10.62Hz in AM & NFM modes).

• Frequency settability from keypad to ± 1.4Hz.

• Tuning rate from spin-wheel 1kHz per rev (4kHz in AM & NFM modes),

• increasing with rapid rotation.

• Fast tuning mode increases rate by 256 times.

• Reception modes : AM Envelope detector and PLL synchronous detector.

• SSB Upper and Lower sideband.

• NFM Narrow band FM.

• Other CW and Data.

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3. Display and Controls

• All receiver states displayed on back-lit, liquid crystal, character / graphic display.

• Display is 2 lines of 24 characters, S-Meter graphic is 70 segments form S1 to S9+50dB.

• Frequency display to 10Hz resolution.

• Rotary controls :

• Volume spin-wheel (with detent).

• General spin-wheel (with detent) used with menu system.

• Tuning spin-wheel (free running).

• Display viewing angle / contrast (on rear panel).

• Push buttons:

• Power on / power and timer menu.

• Menu select (1 button) and menu choice (4 buttons).

• Mode select (2 buttons).

• Fast tune.

• Remote keypad - 32-key infra-red remote control :

• Numeric keypad.

• Volume and tone.

• Filter select and pass-band shift.

• Tuning and memory operations.

• Computer remote control of all functions via 1200 baud, RS232 type interface via 5-pin, 240° DIN connector.

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4. Memories

• 100 frequency memories contain :

• Tuned frequency, mode, I F bandwidth and pass-band shift.

• Squelch setting for AM, NFM and SSB modes.

• BFO setting for CW and DATA modes.

• Scan include / exclude.

• Three set-up memories contain :I F bandwidth, pass-band shift, BFO, squelch and AGC speed settings for each mode.

• Treble and bass settings, aux output levels and aux relay operation, squelch muting and scan hold.

• R F gain, auto / manual switching and Sync detector auto / manual mode and bandwidth.

• Remote keypad tuning step size.

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5. R F Input

• Three antenna inputs (selected by rear-panel switch) :
  50 ohm unbalanced via SO-239 connector.
  600 ohm unbalanced via wire grip connector.

• Hi-Z whip input (on SO-239) with reduced R F performance.

• R F band split at 1.7MHz with high-pass and low-pass filters.

• R F pre-amplifier and attenuators give +10 / 0 / -10 / -20 / -30 / -40dB R F Gain.

• Switching is automatic with manual override.

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6. I F System

• Four I F filters fitted as standard, nominal bandwidths :
  2.2 kHz (default for SSB, CW & Data modes)
  5.5 kHz (default for AM & Sync modes)
  7.0 kHz
  9.5 kHz (default for NFM mode)

• Provision for two more optional filters (at 455kHz) of any bandwidth from 250Hz to 10kHz.

• Pass-band frequency adjustable by ± 4.2kHz for all filters.

• Resolved audio frequency is adjustable by ± 4.2kHz in CW and Data modes.
  AGC is carrier derived with peak detector in SSB modes and mean detector in AM modes.

• AGC release speed selectable : Fast / Medium / Slow. AGC can be switched off.

• Manual I F gain control operates as maximum gain limit.

• Squelch operation is derived from AGC level, with optional signal muting.

• 455kHz I F output available from the AUX connector at about -20dBm / 50ohm.

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7. Audio System

• Entire audio path is two-channel (stereo) with mono loudspeaker output.

• External LS output (disconnects internal LS) via 3.5mm mono jack : 2.2W into 8ohms.

• Headphone output (disconnects internal LS) via 3.5mm stereo jack (mono compatible) : 2.5V from 100ohms.

• Aux outputs (independently adjustable levels) via 8-pin DIN connector : 0 to 800mV from 1kohm.

• Treble tone control : ±8dB at 2kHz in 2dB steps.

• Bass tone control : ±9dB at 200Hz in 1dB steps.

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8. Power supply

• 15V from external AC adapter, current 300 to 500mA typical, 1A max. 30mA on standby.

• Can be operated on 12 to 15V DC with degraded performance at 12V, but EMC compliance is not guaranteed with all types of supply.

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9. Dimensions

• Case : 238 x 77 x 191mm (W.H.D)

• Overall : 238 x 93 x 227mm (W.H.D)

• Weight : 2.2kg.

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10. Sensitivity

All measurements are p.d. at 50ohm input. Figures in brackets indicate R F pre-amp switched on.
SSB and AM values are for 10dB S+N/N, NFM value for 12dB SINAD.

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11. Selectivity

The following data is taken from measured performance of the 455kHz I F system and ignores effects of the 45MHz roofing filter and any audio frequency response.
AGC was switched off.

Click to enlarge		Filter stop-band attenuation (all filters) > 110dB (Filter shown is 5.5kHz)
Click to enlarge		2.2kHz filter characteristics. -6dB bandwidth : 2.29kHz -60dB bandwidth : 3.34kHz -80dB bandwidth : 4.98kHz 6/60 shape factor : 1 : 1.46 Note action of I F tail filter below -70dB, at the 2.2kHz filter's stop-band limit.
Click to enlarge		5.5kHz filter characteristics. -6dB bandwidth : 5.54kHz -60dB bandwidth : 9.11kHz -90dB bandwidth : 10.75kHz 6/60 shape factor : 1 : 1.64
Click to enlarge		7kHz filter characteristics. -6dB bandwidth : 6.90kHz -60dB bandwidth : 11.60kHz -90dB bandwidth : 13.36kHz 6/60 shape factor : 1 : 1.68

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12. Dynamic range

Reciprocal mixing effects :
Quoted figure is unwanted signal strength, relative to noise floor, that decreases wanted signal S+N/N ratio by 3dB.
Tested at 12.75MHz in USB mode with 2.2kHz filter. Wanted and unwanted signals both unmodulated.
Noise floor : -123dBm

Blocking effects :
Quoted figure is unwanted signal strength that reduces wanted signal level by 1dB (with no AGC action). Tested in USB mode with R F pre-amp switched off.
Wanted signal at 20MHz, unwanted signal at 10.7MHz, both unmodulated.

Blocking signal strength : +14dBm (1.12V)
Blocking dynamic range : 137dB

Intermodulation effects :
Quoted dynamic range figure is the difference between the receiver nose floor and the level of two equal unwanted signals required to produce an intermodulation product at the noise floor level.
The IFDR figure here is calculated from measuring the intermodulation level produced by two signals at 0dBm, and verified by re-calculation at -5dBm.
Tested at around 12.7MHz in USB mode with 2.2kHz filter and R F pre-amp switched off.
Noise floor : -123dBm

Switching in the R F pre-amp reduces IP3 by about 10dB, and IFDR by about 2dB.
Second order intermodulation effects :
Measured as above with two signals of 0dBm at around 12.7MHz, resolving the SUM frequency at 25.5MHz.

Intermodulation-free dynamic range : 104dB
2nd order intercept point : +85dBm

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13. Spurious responses

Unwanted signal rejection :
Quoted figures are the levels of unwanted signal, relative to wanted, required to produce a similar S+N/N ratio.
Many figures vary depending on the frequency the receiver is tuned to, so ranges of values are given.

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14. AGC characteristics

Click to enlarge		Signal and Noise (AM mode)
Click to enlarge		AGC Attack : Response to signal change from -90dBm to -60dBm (rise time 1ms)
Click to enlarge		AGC Decay : Response to signal change from -60dBm to -90dBm (all modes)

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15. Audio quality

In-band intermodulation :
For 2 signals more than 200Hz apart, all intermodulation products < -37dB.

Harmonic distortion :
SSB modes, input signal at S9, THD < 0.2%.
AM modes, input signal at S9, THD < 1.3%.

Noise :
AM mode ultimate S/N ratio 52dB (unweighted).

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16. Frequency stability

The receiver uses a single frequency reference which is a temperature compensated crystal oscillator.

TCXO specification is ±2.5 ppm from -30°C to +75°C, and will typically give a receiver stability better than ±1ppm from 10°C to 40°C.

Frequency stability from cold

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17. Local oscillator phase noise

Click to enlarge

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18. Optional filters

The AR7030 uses a second IF frequency of 455 kHz. Due to the automatic filter calibration of the receiver, it is electrically possible to fit almost any 455 kHz filter with input/output impedance of 1,500 to 2,000 OHMS and a bandwidth smaller than 9 kHz whether it be ceramic, mechanical or crystal... the AR7030 will take care of alignment and addition to the filter table for you.

The PCB pattern has been designed to accept the Murata ceramic range of filters in the following format: "CFJ", "CFK", "CFW" and the Collins low profile mechanical filters.
The receiver is supplied with FOUR filters fitted as standard, provision is made for a total of SIX.

Standard fitted:
2.2 kHz (nominal) SSB CFJ455K14 See note A
5.5 kHz (nominal) AM CFW455IT See note A
7.0 kHz (nominal) AM wide CFW455HT See note A
9.5 kHz (nominal) NFM CFU455G See note B
Spare See note C
Spare See note C

Notes:
A Will accept "CFJ", "CFK" or "CFW"
B Fixed position for CFU455G only
C Will accept "CFJ", "CFK", "CFW" or Collins low profile (or almost any other 455 kHz filter connected by flying leads)

Filter fitting sheet in PDF format.

MF300

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MF500

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CFJ455K8

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XTAL 2.4

The XTAL2.4 requires use of the FL124 daughter board.

FL124: Daughter board for fitting crystal filters. Comprises a bracket and PCB designed to take up to 3 crystal filters. Patterned to accept Hy-Q, Kenwood & JRC etc. Supplied with connectors and cables to fit two filters as standard (using the optional Collins positions of the AR7030 PCB), capacitors and fitting sheet. Strongly recommended if fitting crystal filters to the AR7030.

Fitting sheet in PDF format.

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MF2.5

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CFK455J

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MF4.0

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CFK455I

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MF6.0

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19. Block diagram

Click here to view in GIF format.

Click here to view in JPEG format.

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Acrobat format PDF file of the RS232 Command Protocol

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