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Broadcast Electronics PNP 1000 Manual

1000 watt digital fm transmitter
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PLUG–N–PLAY 1000
1000 WATT DIGITAL
FM TRANSMITTER
April, 2002
IM No. 597–9972

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Summary of Contents for Broadcast Electronics PNP 1000

  • Page 1 PLUG–N–PLAY 1000 1000 WATT DIGITAL FM TRANSMITTER April, 2002 IM No. 597–9972...
  • Page 2 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.
  • Page 3 MENU UP/DOWN CONTROLS – Steps through the following readings for the PNP 1000 transmitter. 1) Forward Power. 2) Reflected Power. 3) PA Voltage. 4) Total PA Current. 5) PA Currents 1–4. 6) PA Heatsink Temperature. 7) Exciter Forward Power. 8) Exciter Reflected Power.

  • Page 4: Analog Input

    AUDIO INPUT CONNECTIONS/PROGRAMMING. The PNP 1000 is equipped with several audio inputs: 1) analog left channel and right channel, 2) AES/EBU wire, 3) AES/EBU optical, 4) S/PDIF, and 5) composite. The following text along with Figure 3 presents the procedure to connect and program the unit for the desired audio input.
  • Page 5 J23 on the DSP board. CONNECTIONS – SCA audio is interfaced to the PNP 1000 at connector J2. Connect: 1) SCA + to J2–12, 2) SCA – to J2–13, and 3) SCA shield to J2–14. IMPEDANCE PROGRAMMING –...
  • Page 6 REMOTE CONTROL AND INDICATIONS. The PNP 1000 is designed for remote control/indication operation. The transmitter will interface with almost any remote control unit or panel. The following text along with Figure 3 presents a description of the remote control and indicator functions.
  • Page 7 The high VSWR fault indicator is located at J1–10 and is active low. This fault is active when the reflected pow- er back into the PNP 1000 RF output exceeds 40 watts. The transmitter will maximize power output just below the 40W threshold when high reflected power is detected.

  • Page 8: Modulation Monitor Connection

    J2–14. The input impedance can be configured for 600 Ohms or 10 k Ohms. MODULATION MONITOR CONNECTION. The PNP 1000 is equipped with an RF SAMPLE receptacle. The sample port is for the connection of a modulation monitor or test equipment.

  • Page 9: Ground Connection

    RF OUTPUT LEVEL ADJUSTMENT. The PNP 1000 transmitter RF output is adjusted for a 1000 watt output at the factory. To re–adjust the RF output, proceed as follows: Refer to Figure 2. 1. Operate the front–panel menu to read forward power by pushing the menu up or menu down buttons.
  • Page 10 ADJUSTMENT WITH MODULATION MONITOR – 1. Connect the modulation monitor to the RF SAMPLE receptacle. 2. Operate the front–panel breaker to ON. 3. Depress the front–panel ON switch/indicator to illuminate the switch/indicator. 4. Operate the audio source to output a 400 Hz tone at: 1) –2 dBfs for digital sources or 2) the selected nominal level for analog sources.
  • Page 11 MOUNTING. The PNP 1000 transmitter requires 21 inches (53.3 cm) of a 19 inch (48.3 cm) rack cabinet. Do not mount the trans- mitter directly above or below heat generating equipment. Once a rack location is determined, mount the chassis in...
  • Page 12 PNP–1000 SCHEMATICS...