Operations Manual

RF Technology R50 Page 21
7 SPECIFICATIONS
7.1 Overall Description
Measure the ECLK frequency, accurate to 0.5Hz
and enter the result(in MHz, eg 7.3727965)
Measure the E clock frequency again, and enter yes(y/Y)
if less than 1Hz from prev. freq, or re-enter the frequency
Connect an RF generator to the input
and with output freq of 37.5MHz and output level of -100dBm
Enter <RET> when done.
7 SPECIFICATIONS
7.1 Overall Description
The receiver is a frequency synthesized, narrow band, HF, FM unit which can be used
in conjunction with transmitter and power supply modules as a base station or as a
stand alone receiver. All necessary control and 600 ohm line interface circuitry is
included.
7.1.1 Channel Capacity
Although most applications are single channel, it can be programmed for up to 100
channels, numbered 0--99. This is to provide the capability of programming all
channels into all of the transmitters used at a given site.
7.1.2 CTCSS
Full EIA subtone Capability is built into the modules. The CTCSS tone can be
programmed for each channel. This means that each channel number can represent a
unique RF and tone frequency combination.
7.1.3 Channel Programming
The channel information is stored in non-volatile memory and can be programmed via
the front panel connector using a PC, and/or RF Technology software.
7.1.4 Channel Selection
Channel selection is by eight channel select lines connected to the rear panel that
mounts on the rear DB25 female connector.
A BCD active high code applied to the lines selects the required channel. This can be
supplied by pre-wiring the rack connector so that each rack position is dedicated to a
fixed channel. Alternatively, thumb-wheel switch panels are available.