ATX MAXNET MNRS User manual

ATX Confi dential & Proprietary
INSTALLATION & OPERATION MANUAL
MNRS Redundant RF Detector/Switch Module
www.atxnetworks.com
www.atx.com
®
Pat. #s U.S. 6,842,348; 7,043,236;
Cdn. 2,404,840; 2,404,844
®
Pat. #s U.S. 6,842,348; 7,043,236;
Cdn. 2,404,840; 2,404,844
D3.1/CCAP
™
Compliant

ATX Condential & Proprietary
SignalOn®Series, MAXNET®, HFC Enhance®, PCI Filters®, Q-Series®& FiberLinx®are registered trademarks of ATX in the United States and/or other countries. SMACSM is a
service mark of ATX in the United States and/or other countries. Products or features contained herein may be covered by one or more U.S. or foreign patents. Other non-ATX
product and company names in this manual are the property of their respective companies.
Although every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to make amendments or correct omissions.
Specications subject to change without notice.

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TABLE OF CONTENTS
Page
1. OPERATION .............................................................................................................................................. 1-1
1.1. Operational Details............................................................................................................................ 1-1
1.2. Operational Summary........................................................................................................................ 1-1
2. SET-UP ...................................................................................................................................................... 2-1
2.1. Redundant Amplier Applications...................................................................................................... 2-1
2.2. RF Detector A/B Switch Applications................................................................................................. 2-2
3. THRESHOLD LEVEL SETTINGS ............................................................................................................. 3-1
3.1. Coarse Setting (3-9 dB) - Recommended ......................................................................................... 3-1
3.2. Fine Setting (3 dB) - Advanced.......................................................................................................... 3-1
4. DEVICE RESET......................................................................................................................................... 4-1
4.1. Redundant Amplier Congurations.................................................................................................. 4-1
4.2. RF Detector A/B Switch Congurations............................................................................................. 4-1
5. SERVICE & SUPPORT.............................................................................................................................. 5-1
5.1. Contact ATX Networks....................................................................................................................... 5-1
5.2. Warranty Information ......................................................................................................................... 5-1
MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual i

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Index of Figures
Figures
#1 MNRS Functional Schematic Diagram ........................................................1-1
#2 MNRS Wiring Conguration.........................................................................2-1
#3 MNRS Wiring Conguration.........................................................................2-2
#4 MNRS Front Panel Bar Graph Display ........................................................3-1
ii MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual

ATX Condential & Proprietary
OPERATION
1. Operation
1.1. Operational Details
The MAXNET MNRS RF switch provides redundancy in an RF amplier system. When a failure occurs in the primary
amplier (A) control transfers to a secondary backup amplier (B). The failure of the amplier is determined by measuring
the total composite RF power at the output of the primary (A) amplier and comparing it to the set RF power threshold level.
If total composite RF power drops below the threshold level the MNRS transfers to the secondary (B) amplier to maintain
normal operation. The switch remains in the B position until the primary (A) amplier is repaired or replaced and the MNRS
is reset.
1.2. Operational Summary
Installation into MAXNET®Chassis:
Install the MNRS into the MAXNET chassis by following the MAXNET RF Detector/Switch and Amplier Installation sheet
provided with the unit.
Threshold Setting:
Front panel SET THD potentiometer.
Reset:
Front panel momentary push button – press to set primary (A) amplier active.
Switch Status:
Front panel LED and Relay Contact on rear terminal block.
Power Failure:
Switch Transfers to B position when MNRS power is lost.
NOTE: This device is not intended for exact power measurements.
It is intended to make a nominal total composite RF power measurement and compare it to a user dened threshold
in order to determine the necessary switch status
MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual 1-1
CHAPTER 1: OPERATION
Figure #1: MNRS Functional Schematic Diagram
FROM A
RF OUT
FROM B
TO A
RF IN
TO B
RF
DETECTOR
CONTROL
LOGIC
RLY NO
RLY COM
THDRF
RF (dBmV) THD (dBmV)
(Schematic indicates operation
when device is not powered)
SET THD

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CHAPTER 1: OPERATION
1-2 MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual
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CHAPTER 1: OPERATION
SET-UP
2. Set-up
2.1. RedundantAmplierApplications
Once the MAXNET chassis is powered, the ampliers are connected to the MNRS (see Figure #2 below), review Section 3
for procedures on how to set the threshold level.
MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual 2-1
CHAPTER 2: SET-UP
Figure#2:MNRSWiringConguration

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2.2. RF Detector A/B Switch Applications
Once the MAXNET chassis is powered and the MNRS is congured as shown in Figure #3, review Section 3 for procedures
on how to set the threshold level.
2-2 MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual
CHAPTER 2: SET-UP
Figure#3:MNRSWiringConguration

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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)

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CHAPTER 3: THRESHOLD LEVEL SETTINGS
3-2 MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual
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CHAPTER 3: THRESHOLD LEVEL SETTINGS
DEVICE RESET
4. Device Reset
4.1. RedundantAmplierCongurations
After the MNRS has switched (B ACTIVE LED on and the RF bar graph blank), the operator should determine the cause of
the transfer from primary amplier A to backup amplier B.
Once the cause has been identied and corrected:
• Ensure that the wiring is correct
• 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
4.2. RFDetectorA/BSwitchCongurations
No reset required. Device returns to primary mode when signal source A returns to a power level above the threshold level.
MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual 4-1
CHAPTER 4: DEVICE RESET

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CHAPTER 4: DEVICE RESET
4-2 MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual
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CHAPTER 4: DEVICE RESET
MAXNET®– MNRS Redundant RF Detector/Switch Module – Installation & Operation Manual 5-1
CHAPTER 5: SERVICE & SUPPORT
SERVICE & SUPPORT
5. Service & Support
5.1. Contact ATX Networks
Please contact ATX Technical Support for assistance with any ATX products. Please contact ATX to obtain a valid RMA
number for any ATX products that require service and are in or out-of-warranty before returning a failed module to ATX.
TECHNICAL SUPPORT
Tel: [phone] – press 1
Toll-Free: 866.YOUR.ATX (866.968.7289) USA & Canada only
Email: [email protected]
SALES ASSISTANCE
Tel: [phone] – press 2
Toll-Free: 866.YOUR.ATX (866.968.7289) USA & Canada only
Email: [email protected]
FOR HELP WITH AN EXISTING ORDER
Tel: [phone] – press 3
Toll-Free: 866.YOUR.ATX (866.968.7289) USA & Canada only
Email: [email protected]
Web: www.atx.com
5.2. Warranty Information
All of ATX Networks’ products have a 1-year warranty that covers manufacturer’s defects or failures.

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