ATX Condential & Proprietary
CHAPTER 2: SET-UP
THRESHOLD LEVEL SETTINGS
3. Threshold Level Settings
3.1. Coarse Setting (3-9 dB) - Recommended
• Adjust the SET THD potentiometer fully CCW
• Press and release the reset (RESET) push button:
◦the B ACTIVE LED should turn off
◦the RF PWR level bar graph should indicate a level between 40 and 70 dBmV
• Adjust the SET THD potentiometer CW:
◦obtain a reading on the THD bar graph one bar below that indicated on the RF bar graph (see Figure
#4 below)
NOTE: Threshold (THD) should not be set greater than 15 dB below RF Power (RF) indicator level.
3.2. Fine Setting (3 dB) - Advanced
• Adjust the SET THD potentiometer fully CCW
• Press and release the reset (RESET) push button:
◦the B ACTIVE LED should turn off
◦the RF PWR level bar graph should indicate a level between 40 and 70 dBmV
• Connect a DVM (Fluke 87 or equiv.) between the RF test point (black - negative lead) and the THD (red - positive
lead)
• Adjust the SET THD potentiometer CW:
◦obtain a reading on the DVM of -150 mV (-3 dB)
NOTE: Voltage scaling for RF and THD test points is 50 mV/dB
MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual 3-1
CHAPTER 3: THRESHOLD LEVEL SETTINGS
Figure #4: MNRS Front Panel Bar Graph Display
(Threshold set for 3-9 dB)
