Line input – It is being utilized for processing the signal of a standardized line level from other audio
devices, e.g. various recording instruments, etc.
Digital input/output – This connector is being utilized for the direct data interconnection with the
LOKE receiver and this way a repeater station may be created.
Output cascade may be remote switched either to high or low power. This power is internally
stabilized so it does not depend on the supply voltage. It changes only during channel retuning. It is
slightly decreasing on higher channels.
Antenna – A mobile two-band or a special two-band whip antenna has to be connected to the
transmitter. We recommend the same mobile antenna with magnetic base as that one delivered with
the receiver. The role of output cascade protection circuits is to prevent the output cascade destruction
in case of antenna disconnection. Regardless, we recommend avoid the transmitter operation without
the antenna connected.
Supply voltage – The maximum allowed operating supply voltage value is 15V, the minimum one,
under which the internal stabilizer not operate, is approx. 8V. The switched DC/DC converter holding
stable operation conditions in the mentioned supply range is used in the transmitter. It is necessary to
realize the maximal current consumption from the power supply occurs in case of minimum operating
voltage due to this circuit influence!!!
Cooling – The transmitter consumption from the power supply may be up to 10W and most part of
this power converts to heat energy. Therefore sufficient transmitter packet cooling has to be ensured.
We do not recommend placing the transmitter to confined areas without sufficient air circulation and
other extraction of radiated heat energy.
Accidental reversal of source poles is treated and it has no destructive consequences.
Receiving Unit
Receiver sensitivity 1 µV (Mono), 1.5µV (Stereo) - listening without noticeable defects
0.8µV (Mono); 1.2µV (Stereo) - good speech intelligibility
0.5µV (Mono), 0.8µV (Stereo) - listening on the edge of intelligibility
RF signal processing Double mixing, 1.MF=159.825MHz, 2.MF=10.7MHz, PLL detector
S-meter Displayed value from 0 up to 100 (see the picture below this table)
Data synchronization Bites - hardware PLL Frames - to maximum average of parity
Synchronization time < 0.1 s
Noise squelch After data stream loss, No noise
Receiver digital output TTL, updated copy of received data for retransmission
Receiver line output 0.7V
Receiver repro output 4W, 1 W
Remote control RF power 0.7 W (according to battery voltage, external source, resp.)
External source voltage 12V nom. (8V min., 15V max.)
Current consumption: 110 mA from external power supply (+50mA – display backlighting)
200 mA from internal 3V battery (+90mA – display backlighting)
Internal battery 2 x AA
CONFIDENTAL page 6
