Nautel VS300, Preinstallation Manual

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VS300 Pre-installation Manual Planning for control and monitoring
Issue 2.0 2010-12-01 Page 8-7
Analog outputs
The transmitter provides sample signals that let you monitor performance. The sources of these
analog outputs are pre-defined and configured at Nautel. See
Table 8.3 on page 8-7 for a list of these
pre-defined outputs, their descriptions and their associated output pins on the
REMOTE I/O-B
connector (A1J2B). The outputs are op-amp buffered outputs from a digital-to-analog converter
(DAC). The dc voltage of each output is between 0 to 6 V, 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
Analog outputs 1 through 4 connect to pins of the
REMOTE I/O-B
connector (A1J2B) on the rear of
the transmitter. See Table 8.3 to determine the terminal associated with each analog output. A
ground/shield connection is available on A1J2B, pin 25.
Table 8.3: Factory Defined Analog Outputs
Analog Output Description Pin
1. Forward Power Reports a sample of the transmitter’s forward power. This dc voltage is a linear
function and is full-scale (6 V) when the forward power is 400 W. A1J2B-21
2. Reflected
Power
Reports a sample of the transmitter’s reflected power. This dc voltage is a linear
function and is full-scale (6 V) when the reflected power is 40 W. A1J2B-22
3. PA Voltage Reports a sample of the PA voltage. This dc voltage is a linear function and is full-
scale (6 V) when the PA voltage is 60 V. A1J2B-23
4. Total PA
Current
Reports a sample of the total dc current of the final RF power stage amplifiers.
This dc voltage is a linear function and is full-scale (6 V) when the dc current is
15 A. A1J2B-24