Broadcast Electronics PNP 1000, Руководство пользователя, Страница: 2 / 52

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OPERATION/FEATURE PROGRAMMING.
The PNP 1000 allows the user to select many types of different operating parameters and features. Many of the op-
erating parameters and features are programmed on the DSP and front–panel interface circuit boards. Refer to the
following text to program the transmitter for the desired operating characteristics.
OPERATING PARAMETERS/FEATURES/INDICATORS – DSP CIRCUIT
BOARD.
Many of the operating parameters and features are programmed on the DSP circuit board. Refer to the following
text to program the transmitter for the desired operating characteristics. Refer to Figure 6.
AUDIO INPUT SELECT HEADER –
Header J13 controls the selection of the audio input signal. The unit can be configured for: 1) an analog only
input, 2) a digital only input, or 3) auto mode. The auto mode automatically switches between the analog and
digital inputs. The unit is shipped from the factory configured for auto mode. Program J13 for the desired mode
of operation as follows: 1–2 Analog, 2–3 Auto, 5–6 Digital.
DIGITAL INPUT STATUS –
Indicator D1 presents the status of the digital input. The indicator will illuminate when the digital input is
missing.
ANALOG INPUT –
Header J8 controls the right channel audio impedance. Headers J24/J25 program the right channel audio input
level. Header J10 controls the left channel audio impedance. Headers J31/J32 program the left channel audio
input level. Refer to AUDIO INPUT CONNECTIONS/PROGRAMMING and the ANALOG INPUT
procedures for information associated with the analog input.
POWER SUPPLY INDICATORS –
The DSP circuit board is equipped several power supply status indicators. Indicator D15 illuminates when the
–10V dc supply is operational. Indicator D5 illuminates when the +1.8V dc supply is operational. Indicator D7
illuminates when the +2.5V dc supply is operational. Indicator D4 illuminates when the +3.3V dc supply is
operational. Indicator D11 illuminates when the +5V dc supply is operational. Indicator D12 illuminates when
the +12V dc supply is operational.
OPERATING PARAMETERS/FEATURES – FRONT PANEL INTERFACE
CIRCUIT BOARD.
Some of the operating parameters and features are programmed on the front–panel interface circuit board. Refer to
the following text and Figure 4 to program the transmitter for the desired operating characteristics.
SCA OPERATION –
SCA operation is controlled by SW2 on the controller interface circuit board. The SCA input can be configured
for ON/OFF operation and can be set for 5 kHz or 7.5 kHz deviation. Position 6 on SW2 controls the ON/OFF op-
eration and position 5 controls the deviation setting.
FREQUENCY PROGRAMMING –
The PNP 1000 carrier frequency is programmed by SW1 and SW2 on the controller interface circuit board. Refer
to FREQUENCY PROGRAMMING for information associated with programming the transmitter carrier
frequency. See Table 2.
PREEMPHASIS –
The transmitter can be configured for flat, 50 uS preemphasis, or 75 uS preemphasis via SW2 on the controller
interface circuit board. Position 8 on SW2 turns pre–emphasis ON/OFF and position 7 sets pre–emphasis at 50 uS
or 75 uS. The unit is programmed from the factory for 75 uS preemphasis. SW2 Position 7 OFF = 75usec,
ON=50usec. SW2 position 8 ON = Pre–emphasis OFF, OFF = Pre–emphasis ON. Refer to Figure 4.