Name: Audio Transmission via Power Lines

Text: Audio Transmission
via Power Lines

CONFIDENTIAL

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Audio Transmission via Power Lines

Features









Micro-size FM transmitter
FM/PLL signal transmission
Parametric equalizer
Scrambled model available
Long range
Proven technology
Smart VOX with noise cancellation

Options
STANDARD TRANSMITTER MODEL -TXS
Model -TXS is the standard micro transmitter module with onboard audio circuits.
EXTENDED MICROPHONE MODEL -TXR
Model -TXR is a module where the miniature microphone element is separated from
the transmitter board and mounted on 2 meters of wire, making counter-measure
detection extremely difficult.
SCRAMBLED MODULE MODEL -TXS-S AND -TXR-S
In order to maintain a low probability of detection and to counter casual interception,
we have designed a micro-sized circuit for scrambling intelligence audio with minor
degrading of the audio quality.

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Technical Specifications

RECEIVER -RX
Carrier frequency to be specified
by customer or standard

140 kHz +/- 500 Hz

Sensitivity (fmod. =
deviation +/- 3 kHz)

1

kHz,

- 82 dBm at 20 dB S/N

Sensitivity (fmod. =
deviation +/- 3 kHz)

1

kHz,

- 48 dBm at 50 dB S/N

Selectivity - 30 dB

+/- 20.65 kHz

Common mode rejection

70 dB

AM rejection (Vin = - 20 dBm,
AMmod = 30 %)

40 dB

Distortion (Vin = - 20 dBm,
deviation = +/- 3 kHz)

0.55 %, 1 kHz

Input impedance

275 ohm

Audio frequency response - 3 dB
(line out)

300 Hz to 5 kHz

Output voltage line out (deviation
= +/- 3 kHz)

700 mV (no load)

Output voltage tel. out (deviation
= +/- 3 kHz)

230 mV (600 ohm load)

Output impedance tel. out

600 ohm

Output impedance line out

1 kohm

Output impedance headphones
out

47 ohm

Parametric equalizer frequency
adjustment range

100 Hz to 10 kHz

Parametric
equalizer
adjustment range

0.4 to 4 kHz

Parametric
equalizer
adjustment range

Q
gain

+/- 15 dB

Meter range RF level

- 80 to -20 dBm

Power supply

115 / 230 VAC (50 - 60 Hz)

Dimensions

265 x 255 x 82 mm

Weight

2.8 Kg. / 6.17 lbs

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TRANSMITTER -TXS
Carrier frequency

140 kHz +/- 500 Hz

Output impedance

10 ohm

Output voltage (140 kHz sine)

500 mV RMS into 10 ohm

Max. modulation

+/- 5 kHz

Frequency response

150 Hz to 3.5 kHz - 3 dB

Current consumption

3 mA DC

Audio amplifier AGC range

< 66 dB

Microphone vibration sensitivity

< 66 dB

Dimensions Model 4005-TXS

42 x 22 x 12 mm

Dimensions Model 4005-TXR

14 x 9 x 7 mm / 42 x 22 x 12 mm

Dimensions Model 4005-TXS-S

14 x 9 x 7 mm / 42 x 22 x 12 mm / 35 x 12 x
4 mm

Dimensions Model 4005-TXR-S

14 x 9 x 7 mm / 42 x 22 x 12 mm / 35 x 12 x
4 mm

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CONFIDENTIAL

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