Transmitter Options; External Frequency Control (/C Option) - dB PM 1000 User Manual

DB
ELETTRONICA TELECOMUNICAZIONI S.p.A.

10. TRANSMITTER OPTIONS

The /C option if request is present on the front panel and permits to change the transmitting
frequency without open the equipment.
The /S option has a built-in digital stereo coder with stereo separation in excess of 65 dB and a SNR
of more than 80 dB. The /P option includes a stereo audio processor with a wide range compression
threshold, attack and release time adjustments and full compatibility with digital audio mixing
consoles. The /R option consists of full remote control capability with remote adjustments and
checks for all main parameters: power output adjustment, on/off, protections reset, forward and
reflected power measure, frequency deviation measure and alarms status. The /FSK option makes
the PM 1000 transmitter fully compatible with the FCC automatic identification system. The /VDC
option provides battery operation.
In this manual are included the most requested option from the customers.

10.1 EXTERNAL FREQUENCY CONTROL (/C Option)

On the synthesized board the dip-switches are changed with a 20 pin connector, so that it is
possible connect with a flat type cable this circuit (that manage PLL) to a microprocessor.
The frequency change is fast, because it is only necessary put directly the frequency using the
external frequency control (contraves) on the front panel.
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PM 1000 – 1 kW FM Broadcasting Transmitter - U ' M
SER S ANUAL