Note
At the core of the AR7030 is exceptional strong signal performance coupled with up-to-the-minute enhanced microprocessor features and facilities.
Frequency coverage is from 0 - 32 MHz all mode: AM, Synchronous AM, USB, LSB, CW, DATA & NFM. Four 455 kHz IF filters are provided as standard with provision for a further two (including Collins mechanical and crystal), all of which are self aligned by the receiver for optimum performance and passband symmetry; this in addition to the standard fitted TCXO makes the AR7030 ideal for ECSS applications and long term monitoring of data modes.
For broadcast monitoring, the self tuning variable bandwidth synchronous detector is a pleasure to use and hangs on to the weakest of signals, audio quality is superb, two adjustable line outputs are provided.
Where good strong signal handling is of great importance, the AR7030 must be the most cost effective solution offering an IP 3 greater than +30dBm (typical up to +35dBm reduced by 10dB with the preamp on). Intermodulation free dynamic range with the 2.2kHz filter is typically 105dB @ 100/200kHz spacing, 104dB @ 20/40kHz and still better than 90dB @ 5kHz.
This fantastic strong signal handling is aided by the innovative configuration of a lateral DMOS FET QUAD first mixer running at 15V, relay switching in the front end (not diodes) and the use of shielded inductors throughout the signal path.
All this and GREAT SENSITIVITY better than 0.5uV for 10dB S/N in AM mode and better than 0.3uV for 10dB S/N in SSB. Selectivity too is razor sharp typically offering greater than 90dB @ 5kHz SSB, almost 100dB @ 10kHz and greater than 100dB @ 20kHz, these excellent figures are achieved by the implementation of a remarkably low phase noise local oscillator <-158dBc/Hz @ 100kHz.
The AR7030 receiver is built around a TCXO frequency standard which provides the reference for all circuitry ensuring the ultimate in stability and optimum alignment. Single loop DDS provides the clean local oscillator reference essential for low reciprocal mixing levels and seamless tuning in 2.655Hz steps (10.62Hz in AM & NFM modes) with no tuning plops at regular intervals. The receiver is a double conversion superheterodyne with intermediate frequencies of
45MHz and 455kHz.
Enhanced features include pass band tuning ±4.2kHz, variable audio pitch tune on CW & data modes and a new variable bandwidth synchronous detector for AM listening to eliminate the effects of transmitter / receiver drift as well as reducing distortion from selective fading.
The pass band tuning may be used in synchronous AM mode to select synchronous USB, LSB, DSB or anything in between. A specially developed AGC release characteristic has been developed to provide very smooth SSB. Noise spike compression has also been included to reduce the effects of noise pulses.
A built-in four level attenuator provides levels of sensitivity from +10dB to -20dB.
