Nautel VX150, Руководство по установке

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VX150 TO VX2 INSTALLATION MANUAL CONTROL AND MONITOR WIRING
PAGE 1.8.6 VERSION 0.3 2021-01-14
Analog Outputs
The transmitter provides two sample signals that let you monitor performance. The sources of these
analog outputs are pre-defined and are not user-configurable. See
Table 1.8.3 for a list of these outputs,
their descriptions and their associated output terminals on the
REMOTE I/O-B
25-pin female D-sub
connector on the rear panel of the transmitter (see Figure 1.7.1: on page 1.7.5 ).
The outputs are op-amp buffered outputs from an internal digital-to-analog converter (DAC). The dc
voltage of each output is between 0 and 6 V (full-scale deflection can be scaled by the user; 6 V is
default), and varies within the real limits of the parameter being monitored. The monitoring circuit’s
impedance for each analog output must be greater than 1,000 ohms.
Analog Output Connections
The two analog outputs connect to pins of 8 and 9 of REMOTE I/O B (9-pin male D-sub connector) on
the rear panel of the transmitter. See Table 1.8.3 to determine the pin or terminal associated with each
analog output. Ground/shield connections are available on pin 7.
Nautel provides a D-sub mating connector (Nautel Part # JS223) and connector shell (Nautel Part #
JS225) in the Ancillary kit to facilitate customer connections to the controller, as applicable.
Table 1.8.3: Analog Outputs
RF Monitor Sample
A true RF sample of the RF output voltage waveform is available for external monitoring on the
RF
MONITOR
BNC connector on the rear panel of the transmitter (see Figure 1.7.1: on page 1.7.5 ). The
coupler yields approximately -32 dB (± 1.5 dB), relative to the carrier level, at the FM broadcast carrier
frequency (88 - 108 MHz).
ANALOG
OUTPUT
DESCRIPTION
PIN OF
REMOTE I/O-B
Forward
Power Reports a sample of the transmitter’s forward power. This dc voltage is a linear function and is
full-scale (default is 6 V; user-configurable from 0 to 6 V) when the forward power is the
transmitter’s nameplate power (150 W for VX150, 300 W for VX300, 600 W for VX600,
1000 W for VX1, 1500 W for VX1.5, 2000 W for VX2). 8
Reflected
Power Reports a sample of the transmitter’s reflected power. This dc voltage is a linear function and
is full-scale (default is 6 V; user-configurable from 0 to 6 V) when the reflected power is 12%
of the transmitter’s nameplate power (see forward power levels above; e.g., 120 W for VX1. 9