Nautel XR12, Руководство по предварительной установке, Страница: 42 / 76

XR12 Transmitter Pre-installation Manual Control and monitoring
Page 6-8 Issue 0.17 2005-08-31
Remote performance monitoring
The transmitter provides outputs that let you monitor RF performance. They include DC voltages
that represent the forward power level, the reflected power level, the B+ voltage and the DC current.
In addition, a true RF sample of the RF output voltage waveform is available for external monitoring.
These outputs are provided on the remote interface board.
Analog samples
Sample voltages, in the range of 0 to 4V are provided for the following system parameters:
• J2-1, Fwd Power,
• J2-3, Refld Power,
• J2-5, B+ Voltage and
• J2-7, DC Current.
• J8, RF Monitor
Forward power level.
A buffered DC voltage that reports the forward power level on J2-1. This
voltage is a square law function and will be 3.9 ± 0.5 Vdc when forward power is 10 kW. The
monitoring circuit’s impedance must be greater than 1,000 ohms.
Reflected power level.
A buffered DC voltage that reports the reflected power level on J2-3. This
voltage is a square law function and will be 3.9 ± 0.2 Vdc when the reflected power is 1,800 W. The
monitoring circuit’s impedance must be greater than 1,000 ohms.
B+ volts.
A buffered DC voltage on J2-5 that is directly proportional to the DC voltage from the
main DC power supply. This voltage will be 3.9 Vdc when the DC voltage being applied to the RF
stage is 315 Vdc. The monitoring circuit impedance must be greater than 1,000 ohms.