DB
ELETTRONICA TELECOMUNICAZIONI S.p.A.
PM 1000 – 1 kW FM Broadcasting Transmitter - U
SER
’
S
M
ANUAL
16 /101
3.2
ADJUSTMENTS AND MEASURES
AF INPUTS DEVIATION ADJUSTMENT
For the Left and Right input signals (/S option) use the corresponding XLR female connectors on
the rear panel. The input impedance is 600
Ω
.
The transmitter accepts, adjusting input trimmers, input signal levels from -6 dBm to +10 dBm for a
75 kHz peak deviation.
For Mono input signal (PM1000 without inner stereo generator) the input female XLR connector
have the same input levels than the stereo amplifier.
For MPX input signal (PM1000 without inner stereo generator) the BNC input connector, labelled
MPX (10 k
Ω
input impedance), accepts a 0 dBm for 75 kHz peak deviation input level.
For SCA signals (>53 kHz) use BNC input connectors (1 k
Ω
input impedance) (
Fig. 1.2
): the input
level for a correct deviation of the main carrier (
≈
1.25 kHz peak) is 2.2 Vpp. To adjust the peak
deviation of the main carrier use the “DEV” front panel potentiometer (Fig. 1.1): look at the front
panel meter and select the DEV measurement by means of the selection button “READINGS
SELECTOR” (Fig. 1.1).
Summary of Contents for PM 1000
Page 6: ......
