Cable AML Inc ITX02-2000 用户手册

Indoor Broadband Transmitter – ITX02-2000 

9 

IM402513-10  Rev – 

DC Voltage Diagnostics - DC voltage diagnostic signals can be read using the built- in meter 
on the front panel.  The functions available on the front panel is shown below: 

1.  +12 VDC of Driver power supply (volts)  
2.  +12 VDC buss (volts) 
3.  Current monitor #1, see Data manual for scale factor 
4.  Current monitor #2, see Data manual for scale factor 
5.  Current monitor #3, see Data manual for scale factor 
6.  RF Detector at Amp #1 (volts) 
7.  RF Detector at Amp #2 (volts) 
8.  RF Detector at Amp #3 (volts) 
9.  RF Detector at Amp #4 (volts) 
10.  RF Detector TX Output (volts) 

 

Amplifier Power "On/Off" Switch Panel - this panel is located behind a "blank" front panel as 
shown in Figure 1.  For access to this panel, the "blank" front panel must be removed.  The 
switches are intended to cut off power to the amplifiers.  Their position in the circuitry can be 
seen in the Figure 4. 

A set of relay’s and timer’s is used to delay power to the amplifier.  This is so the +12 VDC 
power supply has a chance to stabilize upon start up of the Transmitter. 

For ease of monitoring the Transmitter output, a downconverter has been mounted inside the 
Transmitter.  The downconverter takes a sample of the output and converts it to VHF.  This VHF 
output signal can then be measured with a Field Strength Meter or a TV monitor.