WJ Communications R1920 MULTI-CHANNEL REPEATER User Manual

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Document ID	43517
Application ID	191ixPPvy90x+gdy98WJPw==
Document Description	USER MANUAL
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	195.58kB (2444716 bits)
Date Submitted	1999-06-22 00:00:00
Date Available	2000-01-27 00:00:00
Creation Date	1999-04-30 12:25:28
Document Lastmod	1999-05-06 10:01:21
Document Title	USER MANUAL
Document Creator	HP 9100C Digital Sender
Document Author:	HIRASUNA SERA

Watkins—Johnson Company
PCS Repeater
Manual
”ibis drawing, print, or document and subject matrer disclosed
herein are proprietary items to which Watkins-Johnson Company
retains the exclusive right of dissemination. reproduclion,
manufacture and sale. This drawing, prim or document is
submitted in confidence for consideration by the designated
recipient or intended using organization alone unless permission
for further disclosure is expressly granted in writing."
05/99
WATKlN HNSON
WATKINSJOHNSON COMPANY
3333 Hillview Avenue
Palo Alto' CA 94304-1223
(800) 951-4401
Internet: htlp://www.wj.com
Repeater
Section
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Table of Contents
Topic
General Information and Safety Precautions
Introduction
Specifications
Safety Considerations
Description
Mechanical
Environmental Conditions
Installation
Introduction
Unpacking and Inspection
Preparation For Use
Pre-Installation Information
Installation Information
Repeater Initial Tum-On Procedure
Setup
Isolation and Alignment Procedure
Multicarrier & FCC Spurious
Connectors
Storage
Packing for Reshipment or Storage
Operation
Introduction
Operating Instructions
Scheduled Maintenance
Introduction
Scheduled Maintenance Action Index
Equipment Required
Preventive Maintenance Procedures
General Maintenance
Alignment
Repair
Drawings
R1910 Mounting
R1920 Mounting Plate
R1920 and BB42 Mounting
R1920 Electrical and System Configuration
Table of Contents
Repeater General Information and Safety Precautions
CHAPTER 1
GENERAL INFORMATION AND SAFETY PRECAUTIONS
1-1 INTRODUCTION
This manual provides information pertaining to the installation, operation, and maintenance of the
Watkins-Johnson R19XXXXX PCS Repeater. shown in Figure 1-1. The model number represents
the type of repeater. This manual covers the following types of PCS repeaters. The model numbers
and letters are defined in the following example.
Example: R1910CAD-1M is a PCS indoor repeater, with CDMA modulation, using frequency
bands A and D, 125th bandwidth, with a modem.
Type Modulation PCS Bandwidth Interface
Frequency Option
Band
RlQlM-PCS Indoor AD*,BE*,FC*
Low Power Repeater
Rl920’6—PCS Outdoor AD*,BE*,FC*
High Power Repeater
R1930 »=PCS Outdoor AD*,BE*,FC*
4 Watt Repeater
R194ON=PCS Outdoor AD*,BE*,FC*
2 Watt Repeater
* Specifies dual bands.
”flaw, l 1 l"d ( Pfifiopemorr ..
Repeater General Information and Safety Precautions
This manual is divided into five chapters, the first four covering a particular topic for the operation
and maintenance of the unit. Chapter 5 includes drawings to assist in mounting W] repwters. The
topics are as follows:
Chapter Tog‘c
1 General Information and Safety Precautions
2 Installation
3 Operation
4 Scheduled Maintenance
5 Drawings
Repeater General Information and Safety Precautions
Figure 1-1‘ R1910 PCS Repeater
Repeater General Information and Safety Precautions
Figure 1—2. R1920/30/40 PCS Repeater
Repeater General Information and Safety Precautions
Chapter 1 provides a general description of the R19XX and summarizes the electrical, mechanical‘
and environmental characteristics. It also provides a tabular listing of the R19XX's performance
specifications. Safety precautions to be observed while operating or servicing the unit are also
explained.
Chapter 2 provides instructions for the initial inspection and installation of the R19XX. It
describes the purpose and function of all I/O connectors, provides initial start-up instructions, and
provides installation verification tests.
Chapter 3 describes the purpose and function of all remote controls and status indicators and
explains how to operate the R19XXr
Chapter 4 provides a scheduled maintenance action index and describes maintenance procedures
that should be performed on a regular basis, such as cleaning and inspection.
Chapter 5 provides drawings useful when mounting a W] repeater to a structure.
Repeater General Information and Safety Precautions
1-2 SPECIFICATIONS
Table 1-1. R1910 Specification
fl DESCRIPTION SPECIFICATION
sandmsmpc
Output Power 100 mWatts CDMA
500 mWatts TDMA
500 mWatts PCS-1900 GSM
Filter Bandwidth 1.25 MHz CDMA (other filters available)
5 MHz TDMA (other filters available)
200 kHz GSM-1900 other filters available)
Noise Fi_ ~ 4 dB T pica]
Maximum Input without -10 dBm
dama_e
Inn-utImedance 50 ohms
cam“
cams“
Si_ 81 Dela 6 usec max
Power llOVAC, 60 Hz
S thesizer, Am-lifiers, Power Am nlifier, Ou mt Power, Oscillation
RS-232 modem 0 ntional)
Gain. Channel ' -uenc , Auto Level Control, and Trackin. Offset
Comm“
Temperature Operating: —10 to +45 C
Stora_e: -40 to +85 C
_ m ms"
NEMAlz
Connectors
RF Type N
Control 9 pin Dsub Female
AC Power NEMA T -e 5-ISP
Repeater General Information and Safety Precautions
Table 1-2. R1920 Specification
SPECIFICATION
DESCRIPTION
Frequency
Band AD‘ BE, or FC
8 Watts CDMA
10 Watts TDMA
15 Watts GSM-1900
Filter Bandwidth 1.25 MHz CDMA
200 kHz TDMA
200 kHz GSM-1900
4mm
Maximum Input without -10 dBm
dama_e
Sterne: -40 to +85 C
__
Connectors
RF
Control
AC Power
Batte
Output Power
Type N
9 pin D-sub, 3 pin circular(see section 2 for pinout information)
3 pin Mini-circular(see section 2 for pinout infonnation)
6 -in Mini-circular
Repeater General Information and Safety Precautions
Table 1-3. R1930 Specification
DESCRIPTION
Noise Fiure 4 dB T ‘nical
Maximum Input without -] 0 dBm
dama _e
In nut Imnedance 50 ohms
as as to 95 as
m;
Si_ alDela
Power 1 10/220 VAC, 50/60 Hz
Alarms & Status S nthesizer. Amnlifiers, Power Amnlifier, Outnut Power, Oscillation
Interface RS-232 and modem
Control Gain, Channel frenuenc , Auto Level Control, and Trackin Offset
Min
Temperature Operating: -40 to +50 C
Slora_e: -40 to +85 C
14.5" x 16" x 9“
5511».
NEMA4
Connectors
RF Twe N
Control 9 pin D-sub, 3 pin circular(see section 2 for pinout information)
AC Power 3 pin Mini-circulaflsee section 2 for pinout information)
Bane 6 nin Mini-circular
Repeater General Information and Safety Precautions
Table l-4. Rl940 Specification
w 7, 7 SPECIFICATION
sandmaaomc
Output Power 2 Watts CDMA
Filter Bandwidth 1.25 MHz CDMA
Noise Fi_ure 4 dB T pical
Maximum Input without -10 dBm
dama e
In -ut Im . - dance 50 ohms
Gain Rane 65 dB to 95 dB
GMe.s
6 “sec max
110/220 VAC, 50/60 Hz
S nthesizer, Am-lifiers, Power Amlifier, Outnut Power' Oscillation
RS-232 and modem
Gain. Channel f ' - uenc , Auto Level Control, and Trackin Offset
convection
Operating: -40 to +50 C
Storae: -40 to +85 C
_ 14.5“xm9”
55 lbs.
Connectors
RF Type N
Control 9 pin D-sub, 3 pin circular(see section 2 for pinout information)
AC Power 3 pin Mini-circular(see section 2 for pinout information)
Bette 6 -in Mini-circular
1-9
Repeater General Information and Safety Precautions
NOTE:
This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmfitl interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the
interference at his own expense.
CAUTION:
Changes or modifications not expressly approved by the
manufacturer responsible for compliance could void user’s
authority to operate the equipment.
1-3 SAFETY CONSIDERATIONS
WARNING
To prevent personal injury, observe all safety precautions and
warnings stated on the instrument and in this manual.
Specific warnings, cautions, and instructions are placed wherever applicable throughout this
manual. These precautions must be observed during all phases of operation, service, and repair of
this unit. Failure to comply with these precautions or with specific warnings elsewhere in this
manual violates safety standard of design, manufacture, and intended use of this instrument.
1-4 DESCRIPTION
The Wl-R19XX Repeaters are used to extend the coverage of a PCS basestation. For example,
inside buildings that do not allow sufficient signal strength from the basestation, there exists a hole
in the coverage for wireless service. The Wl-R1910 is designed to solve that problem.
Likewise, tall buildings in a metropolitan area, or mountains in a more rural area, can reduce
basestation signal strength such that pockets of unusable areas develop. The WJ-Rl920/30/40 is
designed to solve these problems.
The repeater receives the basestation signal via an external antenna see Figure 1-3. This signal is
amplified and filtered by the repeater and ultimately retransmitted via a second antenna, The
entire process is duplicated for the reverse path where the handset signal is amplified and filtered
1-10
Repeater General Information and Safety Precautions
and retransmitted to the basestation. This technique provides PCS coverage inside buildings or in
outside areas that previously did not have sufficient signal strength.
Outside Building Inside Building
Donor Antenna
Repeater Server Antenna
WJ R1910
Lightning Arrestor
Figure 1-3. R1910Typical Usage
1-4.1 Remote Control
Remote control and status reporting of the repeater is provided either through an RS-232 serial
interface or via modem using a standard POTS line. Either interface permits the control of channel
frequency and gain, and can provide unit alarm status.
1-4.2 Prime Power
The R1910 is equipped with a power supply with an input of 110 VAC at 60 Hz. Power
consumption is approximately 65 Watts.
The R1920/30/40 is equipped with a power supply with an input of 1 10/220 VAC at 50/60 Hz with
an optional +24VDC/Battery input Power consumption is approximately 200 Watts.
1-5 MECHANICAL
The R1910 is a 12 x 16 x 3 wall mount unit. Four mounting feet are provided for installation. The
unit is designed to withstand a NEMA 12 type environment.
The R1920/30/40 is a 12 x 16 x 3 tower mount unit. A mounting bracket is provided for
installation. The unit is designed to withstand a NEMA 4 type environment.
1-6 ENVIRONMENTAL CONDITIONS
1-6.1 Non-operating Environmental Conditions
The R19X0 will survive strains. jars. vibrations, or other conditions incident to normal
maintenance, transportation, and handling. Temperature ranges can vary between -40°C and
+85°C with humidity up to 95% non-condensing.
1-11
Repeater General Information and Safety Precautions
1-6.2 Operating Environmental Conditions
The R1910 can be installed and operated in a commercial environment with temperatures varying
between -10°C and 45°C.
The R1920/30/40 can be installed and operated in an outdoor environment with temperatures
varying between -40°C and 50°C.
1-63 Transportability
The R19X0 can be transponed by commercial land carriers or pressurized commercial air carriers
without special handling provisions.
1-12
Repeater Installation
CHAPTER 2
INSTALLATION
2-1 INTRODUCTION
This chapter provides information for the installation. setup and alignment of the R19X0 PCS
Repeater. The information consists of procedures for unpacking, inspection, and preparation for
reshipment or storage, and description of unit connectors. It also provides initial start-up
instructions and installation verification tests.
2-2 UNPACKmG AND mSPECTION
Examine the shipping canon for damage before unpacking the unit. If the shipping carton is
damaged. try to have the carrier's agent present when the equipment is unpacked. If carrier's agent
is not available, retain the shipping canons and padding material for the carrier‘s inspection if
damage to the equipment is evident after it has been unpacked
Verify that the equipment is complete, as listed on the packing slip, Contact Watkins-Johnson
Company, Palo Alto, California, or your local Watkins-Johnson representative with details of any
shortage.
The unit was thoroughly inspected and factory adjusted for optimum performance prior to
shipment. Thus, it is ready for use upon receipt. After unpacking and checking contents against the
packing slip, visually inspect all exterior surfaces for dents and scratches. If external damage is
visible, contact Watkins-Johnson Company,
2-3 PREPARATION FOR USE
2-3.1 Power Requirements
The R1910 is equipped with a power supply that accepts 110 VAC, at 60 Hz single phase. Power
consumption of the R1910 is approximately 65 Watts. The R1920/30/40 is equipped with a power
supply that accepts 110/220 @ 50/60 Hz, with optional +24VDC/Battery input. Power
consumption is approximately 200 Watts
WARNING
Removing or defeating the ground prong on the power cord may
present a lethal shock hazard. Do not use an ac two-to-three wire
adapter plug with this unit.
The R1910 power cord has a 3-conductor grounded plug complying with the National Electric
Code (NEMA Type 5-15P) for 1 10 VAC operation. For the R1920/30/40, or for operation at other
voltages, contact Watkins-Johnson Company or a qualified service technician.
Repeater Installation
2-12 Software Installation
The repeater control application provided on 3.5“ floppy disks or CD-ROM, runs on any Personal
Computer (PC) running Microsoft Windows 95, 98. or NT 4.0 or higher. The computer must also
have one of two serial communications ports available for use, COM 1 or COM 2. To install the
application, insert disk 1 into floppy disk drive A: and from the Start menu select Run and enter
“a:\setup” in the text box of the Run window. Click the OK button and follow the instmctions
given.
2-33 Operating Environment
Environmental conditions during operation should normally be limited as follows:
R1 91 0:
a. Maximum humidity: 95%
hi Temperature range: -10°C to +45°C
R1920/30/40:
a. Temperature range: -40°C to +50°C.
2-4 FIRE-INSTALLATION INFORMATION
2-4.1 R1910
You will need to know some basic information before beginning the R1910 installation Write this
information down, you will need it later on.
Base station location and Channel number to be repeated.
Reverse Tracking offset in dB (Optional).
Location where the Donor antenna is to be installed.
Location where the Server antenna is to be installed.
Phone number of modem line. (Optional)
Location where the R1910 is to be installed (Lat/Long).
QMfiPPI“
2-4.2 11192060140
You will need to know some basic information before beginning the R1920/30/4O installation.
Write this information down, you will need it later on.
Base station location and Channel number to be repeated.
Reverse Tracking offset in dB (Optional).
Location where the Donor antenna is to be installed
Location where the Sewer antenna is to be installed.
Phone number of modem line.
Location where the R1920 is to be installed (Lat/Long).
QuieP’Nl“
2-2
Repeater Installation
2-5 INSTALLATION INFORMATION
2-5.1 Donor Antenna Installation
The Donor antenna will be mounted outside. The antenna should be installed so that it is in line-of-
sight of the base station and is pointed directly at it. If there is an arrow or polarity marking
indicated on the antenna ensure that it is pointing up. Be sure that the antenna or mast is properly
grounded with a grounding strap.
For the R1910 determine where the RF cable will enter building and drill hole if necessary. A
lightning suppresser is highly recommended. install suppresser inside building where cable entry is.
Attach grounding strap to lightning suppresser. Measure distance between antenna connection and
lightning suppresser, add some length for drip loop and cut cable. When routing cable be careful not
to kink, cut or damage cable. Install connectors on cable using the appropriate tool and connect to
antenna and lightning suppresser connector labeled Surge.
2-52 Server Antenna Installation
The Server antenna should be located in an open area free from metallic obstruction if possible.
Mount antenna and route cable from antenna to R1910 location. When routing cable be careful not
to kink, cut or damage cable. No lightning suppression is needed if the antenna is indoors or under
an overhang. Install connector using the appropriate tool and connect to antenna
2-5.3 R1910 Installation
Ambient temperature in the area where the unit is installed should not exceed 45°C Be sure that
unit is positioned upright to permit adequate air flow and that nearby equipment does not discharge
hot air directly on the unit. The installation should allow a free flow of air around the outer
surfaces of the chassis. Access to the bottom should be allowed so that input and output
connections can be conveniently made or changed if desired. The unit weighs nominally 19 pounds
and may safely be carried and installed by a single person.
The preferred mounting of the R1910 is on 16” center studs. See mounting bracket installation at
end of manual. If mounting to other surfaces be sure to use appropriate hardware able to withstand
19 lbs. Before mounting to wall verify AC power outlet is within 10 feet Attach the mounting
brackets to the repeater. Screw in the bottom two ‘/4" X 1 1/2“ bolts into studs. Slide in repeater and
mark top two bolt locations. Remove repeater and install remaining two bolts. Slide in repeater and
tighten bolts. Route cable between repeater and lightning suppressor. When routing cable be careful
not to kink, cut or damage cable. Install connectors using the appropriate tool and connect to
lightning suppresser connector labeled Protected and repeater connector J 3 Donor. Install connector
on cable from Server antenna and connect to repeater connector J4 Server. Connect power cord.
2-5.4 11192060140 Installation
First verify area repeater is to be installed, is within 10 ft of NC power and POTS line junction
box. Install mounting plate 450420 to 2 pieces of channel mounted horizontally to tower, using 4
3/8" bolts, if installing optional battery backup, attach 2 12" pieces of channel vertically to
horizontal channel directly behind 450420 mounting plate. Attach 8-218 shelf to each 12" channel
after mounting plate is securely fastened, mount repeater to mounting plate and secure using
Repeater
Installation
provided bolts. Supplied with repeater is a 12-ft A/C power cord and modem cable. Wire power
cord and modem cable to junction box per R1920 Electrical Drawing. See chapter 5 for installation
drawings.
2-5.4.1 Cable Wiring information
The R1920/30/40 is shipped with 2 cables that have flying leads at one end. Below is the pinout
for those cable assemblies.
§ignnl Name and Pinout
Label
AC Power Cable 1- Ground(Green)
2- Line(Black)
3- Neutra1(White)
Modem Cable 1» Ground(Green)
2- Tip(Red/Black)
3- Ring(Red/White)
2-5.5 Recommended hardware
Depending on the type of structure the R1920/30/40 will be mounted to, additional hardware may
be required. Listed below is the manufacture name and commonly used hardware for a typical
repeater installation.
Manufacture Part Number
A-1200—S
CM-100-3/8
E—l42-3/8x1-1/2
E- 1 45-3/ 8
A-210
8-218
H-l 15-3
1265—21
APT-NFNF-Q
Description
Slotted Channel
Nylon Cone Nut
Hex Head Cap Screw
Standard Hex Nut
Bracket
14" Shelf
U-Bolt
Joslym Surgitron ll AC line
surge protector
TypeN F-F RFlightning
protection
Manufacture Name
Thomas & Betts(Superstrut)
Thomas & Bens(Superstmt)
Thomas & Betts(Superstrut)
Thomas & Betts(Superstrut)
Thomas & Betts(Superstrut)
Thomas & Betts(Superstrut)
Thomas & Betts(Superstrut)
Joslym Electronic Systems Co.
Andrew Corporation
Repeater Installation
7040-01-D Joslyn Station Protector Joslyn Electronic Systems Co.
Modem Line Surge Protector
99343 Power Splitter Tessco
2-6 REPEATER INITIAL TURN-ON PROCEDURE
Verify all RF connectors are tightened and cables and antenna's are secured. On the R1910 turn on
the switch I 1 located at the bottom of the unit and verify PWR led is illuminated green as well as
the AMP and OSC LED‘s. For the R1920/30/40 remove the access cover push power switch , it
should illuminate red.
2-7 SETUP
2-7.1 SERIALINTERFACE
For the R1910, connect a 9-pin cable to connector 12 Control. For the R1920, connect a 9-pin cable
to connector labeled Local Control. Connect the other end of the serial cable to the serial COM port
on a PC. Verify software has been installed on PC. On PC click “WJ Repeater Controller” icon.
Choose the COM port the cable is attached to. After the Repeater window opens. all the parameters
should begin appearing. If not, the wrong COM port may have been selected
2-7.2 MODEM INTERFACE
For the R1910, connect the 9 pin to phone jack adapter to the 12 Control connector. Plug the phone
line into the phone jack of the adapter. For the R1920, connect the supplied three-pin modem cable
to connector labeled Modem and the other end to the POTS line junction box. Connect a analog
phone line to the modem of a PC‘ Verify software has been installed on the PC. On the PC, click
the “WI Repeater Controller" icon on the Desktop or in the Start menu and follow these steps to
establish a connection to the repeater.
1. Choose “Modem“ from the interface selection window and press “Okl’l
2. Enter the phone number of the repeater when prompted, and press “Ok’l
3 When the main window appears, click “File“ on the menu bar. Then select “Connect“ from the
menu.
4. When the Dialer window appears press the “Dial” button to call the repeaterl
When a connection is established the Dialer window will disappear and, after several seconds, the
repeater's parameters will be downloaded.
2-5
Repeater Installation
2-8 ISOLATION AND ALIGNMENT PROCEDURE
After completing the installation, tum—on procedure, and setup you must align and verify proper
operation of the R19XX.
Note: Watkins-Johnson repeaters incorporate an over power protection algorithm. This algorithm
detects when the repeater is transmitting at a power level above that allowed by the FCC. The
repeater continuously reduces the gain of the repeater until the output power is reduced to an
acceptable power level. An Osc/Max Pwr alarm is generated when this occurs.
2-8.1 ISOLATION PROCEDURE
Performing the isolation test will ensure proper system operation. If the Donor
and Server antennas are not sufilciently isolated the repeater will oscillate and
turn oil causing dropped calls and coverage holes.
A Set Uplink and Downlink Gain settings to minimum. Turn off ALC and Tracking.
B. Set Donor Channel # to unused channel with no signal activity.
C. Increase Donor gain setting by 2 dB, RSS should read minimum
D. Increase Server gain by 2 dB, RSS should still read minimum.
E. Repeat steps C and D until the maximum gain settings are reached. If there is any
signal present at RSS or the OSC alarm turns red, there is not enough isolation
between antennas and you must increase the physical distance between antennas or
change the Sever antenna direction away from the Donor antenna.
2-8.2 ANTENNA ALIGNMENT PROCEDURE
a. Ensure correct Channel # is displayed.
f. Adjust FWD gain until signal is present on RSSI.
0. Adjust Donor Antenna for maximum signal deflection on RSSI.
d. Set FWD gain to desired level.
0. When ready, click the “Osc Test" button on the windows control software.
d. After test complete, verify no Alarms are illuminated red. If yes (no alarms red), skip
to step “t“. Ifno (alarms illuminated red) go to “e".
e. Reposition the Donor or Server antennas to improve isolation, or lower FWD or REV
gain settings by 4dB, clear alarms and repeat step “c".
2-6
Repeater Installation
fl If using ALC ', enter ALC Level and enable. Repeat step “c”. lfnot go to “g"l
g If using the serial interface, remove cable from 12, RS-232 on R1910
h‘ Test is complete
Repeater Installation
2-9 MULTICARRIER & FCC SPU'RIOUS
The FCC requires that all spurious signals emanating from the repeater must be at or below -13dBm
outside your frequency band. There are several things one must consider when deploying repeaters.
If you are deploying in a single carrier deployment then there are no other calculations you must
make to verify that the FCC limits are being met. Multicarrier deployment is more complicated, but
good solutions are readily available. The preferred method is to use one repeater per carrier. This
method provides the highest composite output power without producing intexmodulation products
that exceed FCC requirements. A much lower cost solution involves using a repeater with a
bandwidth wide enough to allow 2 or more signals to pass. This method provides the lowest cost
solution but can limit composite output power depending on the frequency of the signals. The two
methods are detailed below.
2-9.1 METHOD 1 ~ MULTIPLE REPEATERS
This method is straightforward and actually increases the composite output power of the system by
maintaining the maximum output power per carrier. For example, a repeater with a lOWatt output
will provide a composite of 20 Watts if used in a 2 repeater configuration where each repeater
transmits 1 signal. See the Figure 1 below
WJ WJ
Repeater Repeater
spun-r
Figure 1 Multicarrier for Highest Output Power
2-8
Repeater Installation
This arrangement can be expanded to more carriers if necessary. Notice how a dual polarized
antenna is used for the server. This allows you to run each repeater output to the antenna without
using a power combiner. The 3dB loss of signal power associated with a power combiner is
eliminated.
This method produces the highest composite output power at the expense of more equipment.
2-91 METHOD 2 - WIDER BANDWIIYI'H REPEATER
This method is much less costly but must be used and deployed carefully. The repeater in this case
uses a filter that passes 2 or more signals. The inter-modulation products that are produced by
these signals must be kept to below -13dBm to comply with the FCC. You can see from Figure 2
that the amount of equipment necessary is one half that as seen in the multiple repeater
deployment.
WJ
Repeater
Figure 2 Multicarrier for Lowest Cost
Notice how simple the deployment is. No combiner or dual polarized antenna is required. This
method is the lowest cost method but sacrifices output power.
Repeater Installation
The intermodulation products produced with Method 2 will look something like Figure 3‘
Your PCS Band
Freq 1 Freq 2
0—0
Carriers Spaced ‘X' MHz apart
4— —
Dillerence between Freq 1 and Dillerence belween Freq 2
Lower Band Edge and Upper Band Edge
Figure 3
The 2 large signals depict the carriers (Freq 1 & Freq 2) The other signals are intermodulation
products (A B, C) created by these two signals. What is important for the FCC is to keep the level
of these intermodulation products below -l3dBm outside your licensed band. The FCC does not
regulate Spurious within your frequency band (although you must determine what iu-band spurious
levels your system can tolerate) The power of the inter-modulation products decreases as the
intermodulation product increases (A>B>C). See the charts below to ensure that you are not
exceeding the FCC requirements.
The following tables and charts should be used to verify proper operation of the method 2
multicarrier configuration
2-10
Repeater Installation
Table 1 Output Power vs. Signal Number for Indoor Repeaters
R1910
Air Interface # of Carriers Composite Power (dBm) Spurious A,B,C
CDMA 1 or more 20 < -13dBm
TDMA l 27 < -13dBm
2 or more 20 < -l3dBm
GSM 1 27 < - l SdBm
2 or more 20 < -l3dBm
R 1 920C Chart 1
Two CDMA caniers spaced "X" MHz apart
vs
The frequency difference from one carrier to the band edge
60
ZE‘EM)
sifizo
83 U
5X 4X 8X 2X 1 X
Muklples of "X" lrom earner Io band edge
2-1 1
Repeater Installation
R1930C Chan 2
Two CDMA carriers spaced "X" M“: apart
vs
The frequency difference from one carrier lo the band edge
3 40 36 36 36
A 30
a m 20
8 E 3 10
g 0
5X 4X 3X 2X 1X
Multiples of "x" from carrler to band edge
R1940C Chart 3
Two CDMA carriers spaced "x" MHz apm
VS
The frequency drfferenee from one carrier m the hand edge
Composite
Output Power
(dam)
o ‘o‘ 8 8 S
5X 4X 3X 2X 1 X
Multiples o! "X"1rom urrler to band edge
R192Ul‘ Chart 4
Two TDMA carriers spaced "x" MHz span
VS
The frequency difference from one carrier m the band edge
(dawn
to e
4: a
Compoelm
Output Paw
5X 4X 8X 2X 1 X
Multlplaa of "X“ "on carrier to band nga
2-12
Repeater Installation
R192OG Chart 5
Two GSM carriers spaced "x" MHz apm
vs
The frequency difference from one carrier to me band edge
60
2 g - 4D
3; e E
E = 3 20
s g 0
5X 4X 3X 2X 1 X
Multiples 0! “x" Imm carrier to band edge
Example
Air Interface: CDMA
Block: A (1930MHz to 1945MHz)
Channels: 100 (1935.0 MHz)
150 (1937.5 MHz)
Repeater: R192OC
The frequency difference between the two carriers is (1935.0MHz - 1932.5MHZ =
2.5MHz = X‘). The frequency difference from the band edge to the carrier is
(1935.0MHz - 1930.0MHz = 5.0MHz]. Therefore, there are (5.0MHz / 2.5MH2 =
2) multiples of X from the carrier to the band edge. Using Chart 1 we see that
the composite power must be kept below 34der
2-13
Repeater Installation
2-10 CONNECTORS
Figure 2-7.l shows the connectors and Table 2-1 provides a ducription of each connector on the
R1910 unit.
Table 2-1. R1910 Connectors
Reference
Designator Label Description
I 1 AC PWR IN This POWER connector is a multipin connector cabling a user-
suppljed ac power source (110 VAC‘ 60 Hz) to the power
supply in this unit.
JZ RS-232 This 9 pin D-sub female connector is provided for RS-232
communications between the R1910 and a PC.
I 3 SERVER Receives Handsets RF, Transmits Base Stations RF, connects
to Server antenna.
14 DONOR Receives Base Stations RF, Transmits Handsets RF, connects
to Donor antenna
Figure 2:7.1 R19101/0 Connections
Figure 2-72 shows the connectors and Table 2-2 provides a description of each connector on the
R 1 920 unit.
Table 2-2. R1920 Connectors
2-14
Repeater
Label
AC
1 10/220 VAC
+24 VDC 9A
BATTERY
LOCAL
CONTROL
MODEM
REMOTE
CONTROL
SERVER
DONOR
Description
This POWER connector is a multipin connector cabling a user-
supplied ac power source (110/220 VAC, 60 Hz) to the power
supply in this unit.
This connector cables directly to the optional BB42 battery
backup unit.
This 9 pin D-sub female connector is provided for RS-232
local communications between the R1920 and a PC.
This 3 pin circular connector is for POTS line interface to the
R1920.
This connector cables to the optional EX6 repeater expander
unit.
Receives Handsets RF, Transmits Base Stations RF, connects
to Sewer antenna.
Receives Base Stations RF. Transmits Handsets RF, connects
to Donor antenna
Figure 2.7.2 R1920 I/O Connections
Installation
2-15
Repeater Installation
2-11 STORAGE
Environmean conditions during storage and shipment should normally be limited as follows:
a Maximum humidity: 95% (no condensation)
b. Temperature range: 40°C to +85°C
2-12 PACKING FOR RESHIPMENT OR STORAGE
If the R19X0 must be prepared for reshipment or storage, use the original packing and shipping
materials. if possible. Otherwise, the following general instructions should be used for repackaging
with commercially available materials:
a. Wrap unit in heavy paper or plastic.
b. Use a strong shipping container. A double-wall canon made of 350-pound test
material is adequate.
c. Use a layer of shock-absorbing material 70 to 100 mm (3 to 4 inch) thick around all
sides of the instrument to provide firm cushioning and prevent movement inside
container. Protect rear panel connectors with cardboard.
d. Seal shipping container securely.
e. Mark shipping container FRAGILE to ensure careful handling.
f. In any correspondence, refer to instrument by model number and full serial numbert
2-16
Repeater Operation
CHAPTER 3
OPERATION
3-1 INTRODUCTION
This chapter provides information for operating the PCS Repeater. The R1910 is designed to work
in an indoor environment only. while the R1910/30W) is designed to work in an outdoor
environment
The R1910 and R1920/30/40 are fully compliant with FCC part 24 For the R1910, there are no
panel controls other than the power switch For the R1920/30/40, there are no external controls or
indicators. Access to NC power connects and interface connections are via an access panel.
The operator must be familiar with the control software being used and the operation and
functional capabilities of the R19X0.
3-2 OPERATING INSTRUCTIONS
The following paragraphs provide a description of the control functions and operation of the
R19X0 PCS Repeater.
3-2.1 Power-up Sequence
For the R1910, to turn on the unit push the “1" side of the power switch rocker arm to the
depressed position. For the R1920/30/40, remove the access panel and push the power switch.
The unit will go through an initialization, which includes restoring the unit to its last powered-up
state and checking the alarm status.
Table 3-1. Initial Parameter Status
R1910 Initial Value R1920/30/40 Initi Value
AD,Bl=.,Fc ADBEJ-‘c
Channel 0-1199 CDMA 0-1199 CDMA
1-1999 TDMA 1-1999 TDMA
512-810 PCS-1900 GSM 512-810 PCS-1900 (GSM)
65-95dB 65-95dB
REV Power Out 0 to +27dBm 0 to +27dBm
3-1
Repeater Operation
FWD RSS > -70dBm
Alarms Green
3-21 WJ Repeater Control Application
The repeater is controlled via either a standard RS-232 interface or via modem interface using a
POTS line with the. Windows 95/NT based, Watkins—Johnson Company Repeater Control
application. Figure 3-1 shows the control panel of the application.
At the top of the panel is a menu bar with two menu items, File and Help The File menu item
provides a means of changing interfaces, connecting or disconnecting from a modem, closing the
application, and also has a maintenance feature used by the factory. The Help menu item contains
a copyright notice and software version information.
Figure 3-li Repeater Control Panel
34.2.1 Starting Control Software
With the left mouse button' double-click the phone icon labeled “WJ Repeater Control.“ The
application will launch and request which interface to use for communicating with the repeater.
Select the either one of two Com ports, or the modem, and press the OK button Pressing Cancel
will quit the application. The repeater must be equipped with the modem option in order to use the
modem interface.
3-2
Repeater Operation
When the application is running and using the serial interface, it is able to detect the presence of a
repeater on the selected serial Com ports When a repeater is detected, the application reads its
current configuration and settings and displays them in the application window. See figure 3.1.
When no repeater is detected the application clears the window.
34.2.3 Unit Type and Configuration Parameters
At the top of the window is displayed the repeater’s model number, serial number, frequency band,
modulation, and filter bandwidth parameters. The “Band” parameter is the PCS band setting of the
repeater. There are 9 possible PCS bands combined into 3 dual band selections, AD, BE, and FC.
Bands AD, BE, and PC are wide band options that give the repeater the ability to operate in two
bands. The modulation parameter displays which modulation type the repeater is configured for,
CDMA, TDMA, or GSM. The bandwidth parameter is the saw filter bandwidth of the repeaters
34.2.4 Channel Number and RF Frequency Parameters
Channel number parameters Donor and Server are used to set the RF frequency of the donor and
server RF paths. The Donor channel controls the RF frequency being transmitted by the
basestation‘ The Server channel controls the RF frequency being transmitted back to the
basestation. If the repeater is not configured for dual frequency operation. the two channel
numbers will track each other. The actual frequency of a selected channel number can be viewed
by placing the mouse pointer over the channel number of interest.
The repeater can be set to any allowable frequency channel in the band of the repeater by changing
the channel number. The channel can be changed by either clicking the Up/Down arrow next to
the channel, or by placing the cursor in the channel number box and typing in a new channel
numbert Don’t forget to press the  key when typing in a channel number. When the
channel number is changed the forward and reverse frequencies for that channel are computed for
display.
34.2.5 Downliuk and Uplink Gain Parameters
The gain values for the corresponding RF paths can be changed by either clicking the Up/Down
arrow next to the gain parameter, or by placing the cursor in the desired parameter window and
typing in the value. The ability to change the downlink gain parameter is disabled when the Auto-
Leveling Control (ALC) feature is enabled. Also, the ability to change the uplink gain parameter
is disabled when the Reverse Tracking (Rev Tracking) feature is enabled.
34.2.6 RF Power Out Parameters
The “PWr” parameters display the current RF power out of the repeater level in dBm. These are
status information only
3-3
Hepeater Operation
3-2.2.7 Auto-Leveling Control
The Auto-Leveling Control (ALC), when enabled conunands the repeater to maintain the dovmlink
path RF output power level indicated in the “Leve ” box, +/-2dB, by automatically adjusting the
downlink gain as appropriate. The valid range for ALC is 0 to 27dBm for the R1910 and 15 to
41.5dBm for the R1920. When ALC is enabled. control of the downlink path gain is no longer
allowed. The downlink gain display box will tum into a status indicator displaying the current
gain setting, as controlled by the repeater.
34.2.8 Reverse Tracking Control
The Reverse Tracking, when enabled, commands the repeater to keep the uplink path gain at the
“Offset" level from the forward path gain. For example, suppose that the forward gain had been
set to 68dB, and the Reverse Tracking level set to ~4dB. When Reverse Tracking is enabled, the
reverse gain would be automatically set to 64dB. When this feature is enabled, control of the
uplink gain is no longer allowed. The control is disabled, and is used for displaying the current
gain setting. as controlled by the repeater. Reverse Tracking is limited to +/- lOdB.
34.2.9 Received Signal Strength (RSS)
The “Donor RSS” parameter is a graphical display of the received (input) signal strength in the
downlink RF path.
3-22.10 Oscillation Test
The “OSC Test” button initiates the oscillation test function. The purpose of the oscillation is to
check the isolation between the donor and server antennas. Ideally, the test should only be
performed on an unused channel to avoid unnecessary interruptions of a working network. When
the oscillation test button is pressed the operator is presented with a window asking for the channel
number to use for the test. Enter the channel numbers and press "0k" to start the test, or press
“Cancel" to quit.
The application disables ALC and Tracking, if enabled, and raises the gain of each RF path by
approximately 14dB. and monitors the oscillation alarm. The test takes approximately 15 seconds.
When the test is complete, the gain, ALC, and Tracking settings are restored to their original
settings. If an oscillation alann occurred you must clear the alarm by pressing the “Clear Alarms”
button on the alarm window.
Note: Watkins-Johnson repeaters incorporate an over power protection algorithm. This algorithm
detects when the repeater is transmitting at a power level above that allowed by the FCC. The
repeater continuously reduces the gain of the repeater until the output power is reduced to an
acceptable power level. An Odeax Pwr alarm is generated when this occurs.
3-22.11 RF ONIOFF
The RF ON/OFF button is both a status indicator and a control. The name on the button is the
state of RF paths in the repeater. When the button reads “RF On“ then both RF paths are powered-
Repeater Operation
up and operational. When the button reads “RF Off“ both RF paths are powered-down, making
the repeater non-operationali Also, when the RF paths in the repeater are tumed-off the button
will turn red for emphasis.
3-22.12 Alarms
The Alarm button is both an indicator, telling the operator that an alarm has been detected in the
repeater by turning red, and a control that brings up a separate alarm window that displays all
possible alarms, when its pressed.
In the alarm window are three groupings of alarms. There are a group of five General Alarms and
a group of alarms for each RF path‘ When an alarm condition is detected, the alarm parameter on
the panel will turn red, and stay red as long as the alarm is present. With the exception of an
Oscillation alarm and a General Power Amp alarm, the repeater maintains operation as much as it
is able. However. if an oscillation alarm or Power Amp alarm occurs, the repeater automatically
shuts down the RF chains and ceases to function. Once this occurs, the only way to clear the alarm
in the repeater is to click the “Clear Alarms" button. After clearing, the unit will continue to shut
down as long as the alarm is present.
3-2.2.13 Multiple Repeater Interface
The Multiple Repeater Interface (MRI) is a unit that allows a user to communicate over a modem
with up to six repeaters over the same modem connection. When this application detects the
presence of a MRI unit, the MRI button on the main window is enabled‘ Pressing the MRI button
brings up the MRI Configuration window, which allows repeaters to be added or removed from the
MRI unit.
3-23.14 Status Bar
At the bottom of the panel is a status bar that displays four pieces of information. Beginning in the
left most, and largest box, is basic status information about the operation of the application . The
second box from the left is only active when communicating to a MRI unit. When a MRI unit is
detected, this box will display the repeater number of the repeater that the application is
communicating with. The third box from the left displays the voltage level of the backup battery if
3—5
Repeater Operation
one is installed. The next box displays the internal temperature of the repeater in degrees
centigrade The right most box displays the currently selected interface that the application is
using to communicate with the repeater.
When using the serial RS-232 interface, the application is able to detect the presence of a repeater.
When one is not detected the panel clears all the data fields, disables all parameter input fields,
and displays a status message on the status bar of “No Device." When a repeater is connected to
the serial port and turned on, the application will detect its presence and download and display its
configuration. It will also change the status bar to indicate a device was found and re-enable all
parameter entry fields.
3—6
Repeater Scheduled Maintenance
CHAPTER 4
SCHEDULED MAINTENANCE
4-1 INTRODUCTION
The WJ PCS Repeaters are designed to operate for extended periods of time with minimum
routine maintenance. Inspection and performance tests should be conducted at regular intervals
consistent with the facility's normal scheduling and after troubleshooting. No routine adjustments
are required. Troubleshooting and perfomianee tests can be most effectively carried out if the
technician first familiarizes himself with the operating instructions and circuit descriptions.
4-2 SCHEDULED MAINTENANCE ACTION INDEX
The scheduled maintenance action index is provided in Table 4‘li It lists the maintenance action to
be taken. gives the paragraph reference for detailed instruction, and specifies the maximum time
intervals between equipment cleaning, inspection, and performance checks.
EARNIMQ
Whenever possible, all preventive maintenance should be
performed with the power cord disconnected from prime power
source.
4-3 EQUIPMENT REQUmED
No special tools or test equipment are required for performing routine preventive maintenance.
4-4 PREVENTIVE MAmTENANCE PROCEDURES
The R19XX repeaters are designed to operate for extended periods of time with minimum
maintenance. Normally. the only preventive maintenance tasks to consider are:
a. Cleaning the unit.
17. Inspecting the outside of the unit for physically worn, damaged, loose, or overheated
parts.
0. Performing a performance check of the unit,
Ifthe equipment is used in an environment where a great deal of dust. high temperature, or high
humidity is present, the frequency of the checks should be increased.
4-1
Repeater Scheduled Maintenance
Table 4—1. Scheduled Maintenance Action Index
Paragraph
PM Action Reference Schedule
Cleaning outside of equipment 4- Every 12 months or when dust is seen on the
surface of the equipment.
Inspecting for damage or wear When the unit is not operating properly.
4-4.1 Exterior Cleaning
Remove loose dirt accumulated on the outside of the unit with a moist paper towel, cloth. or brush.
The bnrsh is good for removing din on and around the connectors, Dirt and grease which is not
removed can be cleaned off with a paper towel or cloth made moist with a detergent and water
solution. Do not use an abrasive cleaner.
44.2 Inspection for Damage or Wear
Many potential or existing troubles can be detected by making a visual inspection of the unit. For
this reason, a complete visual inspection should be made on a regular basis and whenever the unit
is inoperative. Damage due to overheating may be the result of other less apparent troubles in the
unit. Mechanical parts such as pin connectors and power switch should be inspected for excessive
wear, looseness, misalignment, corrosion, and other signs of deterioration.
4-5 GENERAL MAINTENANCE
A complete inspection of the unit should be made during the cleaning operation for signs of
mechanical and electrical failures. Mechanical pans, including connectors, should be checked for
wear, loose connections, bad alignment, or other possible causes of defective operation. Worn
parts should be replaced and loose connectors tightened Check for loose cable connections, and
tighten those connectors Remove the fuse and check for corrosion or damage, replace when either
occurs.
After a repair has been made alignment should be carried out, if necessary, and appropriate
performance tests should be used to verify proper operation.
4-6 ALIGNMENT
This unit requires that the gain be set correctly for both server and donor paths, to avoid
oscillation. See section 2-8.
4-7 REPAIR
All repairs to W] PCS repeaters should be performed by a Watkins-Johnson authorized technician
Any unauthorized repair could void the warranty.
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