Broadcast Electronics PNP 1000, Manual, Page: 4 / 52

20
HIGH VSWR FAULT INDICATOR –
The high VSWR fault indicator illuminates when the reflected power 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.
INPUT AUDIO OVERLOAD INDICATOR –
Illuminates to indicate the audio input level is approximately 4 dB above nominal. This level may cause
clipping at the digital–to–analog converter and result in high audio distortion.
AUDIO COMPRESSION INDICATOR
Illuminates to indicate the automatic–gain–control circuit on the DSP circuit board is engaged. This will occur
when the audio input level is approximately 2 dB above nominal. The circuit is designed to compress higher
than nominal levels to prevent clipping at the digital–to–analog converter.
FAILSAFE CLOSED INDICATOR
Illuminates to indicate the failsafe is properly connected on the remode D–sub connector J1–17. If the remote
control common is configured for positive logic, J1–17 requires a +5 to +12 volt input. If negative logic is chosen
then J1–17 requires a ground connection.
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.
ANALOG INPUT.
CONNECTIONS –
Analog left and right channel audio is interfaced to the PNP 1000 at connector J2. Connect the analog left and
right channel audio to J2 as follows:
AUDIO SIGNAL J2
Left C J2–9
Left Channel – J2–10
Left Channel Shield J2–11
Right C J2–1
Right Channel – J2–2
Right Channel Shield J2–3
IMPEDANCE PROGRAMMING –
The analog left and right channel audio impedance is controlled by headers J8 and J10 on the DSP circuit board.
The unit can be programmed for a 600 Ohm or 10 k Ohm audio impedance. The unit is shipped from the factory
configured for a 600 Ohm audio impedance. Program the unit for the desired audio impedance. J8 and J10 jump-
ers ON = 600 Ohm, OFF = 10k Ohm. Refer to Figure 6.
LEVEL PROGRAMMING –
The analog left and right channel audio level is controlled by headers J24/J25/J31/J32 on the DSP circuit board.
The unit can be programmed for a –10 dBm, 0 dBm, +4 dBm, or a +8 dBm audio input level. The unit is shipped
from the factory configured for a 0 dBm Ohm audio input level. Program the unit for the desired audio level.
J24/J25/J31/J32 jumpers at position 1 = –10dBm, position 2 = 0dBm, position 3 = 4dBm, position 4 = 8dBm.
Refer to Figure 6.