Comtech EF Data LTT1450G - Manual (Page 8)

LTT1450G Ku-Band Loop Test Translator Table of Contents
TM063 - Rev. 1
vi
3.3.3 REF OUT…………………………………………………………………………………………… 3-3
3.3.4 Test Fault (J5)……………………………………………………………………………………… 3-3
3.3.5 Serial Port (J6)……………………………………………………………………………………… 3-4
3.3.6 GND………………………………………………………………………………………………… 3-5
3.3.7 100/240 Vac Power Entry Module………………………………………………………………… 3-5
4.0 Confidence Test and Troubleshooting……………………………………………………………… 4-1
4.1 Confidence Test Procedure………………………………………………………………………… 4-1
4.1.1 Power ON Testing……….………………………………………………………………………… 4-1
4.1.2 Transfer Characteristics Testing….……………………………………………………………… 4-1
4.1.3 Attenuator Calibration Testing.…..…….……………………………………………………………4-2
4.1.4 Spectral Response Testing……..………………………………………………………………… 4-2
4.2 Troubleshooting....…………………………………………………………………………………… 4-2
4.2.1 LO Fault….……….………………………………………………………………………………… 4-2
4.2.2 Transfer Characteristics Faults…..……………………………………………………………… 4-3
4.3 Attenuator DAC and Calibration...…..………………………………………………………………4-3
5.1 Introduction……………..…..………………………………………………………………….………. 5-1
5.2 Command Structure………………………………………………………………………………… 5-1
5.2.1 Status Prompt....…………………………………………………………………………………… 5-1
5.2.2 Control Commands…...…………………………………………………………………………… 5-2
5.3 Status Commands..…..……………………………………………………………………………… 5-3
5.4 Calibration Commands…..…………………………………………………………………………… 5-4
5.4.1 Set-Calibrate-Mode Command.…………………………………………………………………… 5-4
5.4.2 Valid Commands while in CAL Mode…..………………………………………………………… 5-4
Appendix A - Technical Specifications..……………………………………………………………… A-1
Appendix B - Configuration Drawings…………………………………………………………………... B-1