IPMobileNet IP100 User manual

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Released: September 4, 2003
IPMN p/n: 516.80499.UM
Revision: A
16842 Von Karman Avenue, Suite 200 Irvine, CA 92606
Voice: (949) 417-4590 Fax: (949) 417-4591
www.ipmobilenetinc.com

2003 IPMobileNet, Inc. Revision & Copyright IPSeries BS User Manual / Rev. A / 04-September-03
DOCUMENT REVISION CONTROL
Document Title: IPSeries Base Station User Manual
New Release Version: A
New Release
Date Previous
Version Action Old
Pages New
Pages
09/04/03 -- Release Revision A N/A N/A
COPYRIGHTS STATEMENT
The IPSeries Base Station User Manual is copyrighted to IPMobileNet, Inc.
All rights reserved. This document is confidential and proprietary information of IPMobileNet, Inc. The
distribution or duplication of this document is expressly forbidden without IPMobileNet’s prior written consent.
Disclaimer. While reasonable efforts were made to ensure that the information in this document was complete and
accurate at the time of printing, IPMobileNet, Inc. can assume no responsibility for any inaccuracies. Changes and
corrections to the information within this document may be incorporated in future releases.

TABLE OF CONTENTS
2003 IPMobileNet, Inc. 3IPSeries MR User Manual / Rev. A / 04-September-03
MANUAL COMPONENTS ...............................................................................................................4
Manual Purpose .................................................................................................................4
Manual Contents .................................................................................................................4
Manual Use.........................................................................................................................5
Audience.............................................................................................................................5
CHAPTER 1: INTRODUCTION .......................................................................................................6
Product Description..............................................................................................................6
Product Functionality ...........................................................................................................6
External Features ................................................................................................................7
Product Specifications..........................................................................................................9
Theory of Operation...........................................................................................................10
Block Diagram Definitions ......................................................................................10
CHAPTER 2: BASIC NETWORK CONFIGURATIONS...................................................................12
Basic Network Connection..................................................................................................12
Network Connection to an Existing LAN..............................................................................13
CHAPTER 3: PRODUCT SETUP AND PRELIMINARY TESTING...................................................14
Base Station Setup............................................................................................................14
Rack Unit Mounting................................................................................................14
Preliminary Testing............................................................................................................15
Checklist for Required Material for Preliminary Testing.............................................15
Preliminary Testing Procedure............................................................................................16
CHAPTER 4: PRODUCT INSTALLATION.....................................................................................17
Installation Overview..........................................................................................................17
Adjusting the Power...........................................................................................................18
Installation Instructions.......................................................................................................21
Interconnection Diagram........................................................................................21
Base Station Installation into the Rack Unit..............................................................21
Single Base Station Configuration...........................................................................23
Multiple Base Station Configurations.......................................................................23
Typical Antenna Configuration................................................................................24
Near-Field Exclusion Zone .........................................................................25
Power Connection .................................................................................................26
Post Installation Checklist.......................................................................................27
CHAPTER 5: PROGRAMMING INSTRUCTIONS...........................................................................28
Overview...........................................................................................................................28
HyperTerminal Setup .........................................................................................................28
Factory Default Save and Restore ......................................................................................30
Additional Programming Needs ..........................................................................................30
CHAPTER 6: CUSTOMER SUPPORT...........................................................................................31
Ordering Parts...................................................................................................................31
Customer Support..............................................................................................................31
Reporting Problems with the Documentation .......................................................................31
APPENDIX A: Backhaul Requirements........................................................................................32
APPENDIX B: Base Station IPMessage Parameters.....................................................................34
FIGURE LISTING..........................................................................................................................37
GLOSSARY..................................................................................................................................38
INDEX ..........................................................................................................................................42

MANUAL COMPONENTS
2003 IPMobileNet, Inc. 4IPSeries MR User Manual / Rev. A / 04-September-03
Manual Purpose
The purpose of the IPSeries Base Station User Manual is to provide IPMobileNet dealers and customers
with the necessary information required to install, operate, and troubleshoot problems with the IPSeries
base station.
Manual Contents
This user manual contains the following sections:
§Chapter 1: Introduction
The Introduction provides a description of the base station as well as a general overview of its
functionality, product interfaces, and theory of operation with a block diagram and definitions.
§Chapter 2: Basic Network Configurations
Basic Network Configurations provides a series of network diagrams depicting possible network
configurations.
§Chapter 3: Product Setup and Preliminary Testing
Product Setup and Preliminary Testing provides a diagram and information required for mounting the
base station in a rack unit as well as preliminary testing prior to putting the base station into service.
§Chapter 4: Product Installation
Product Installation provides diagrams and instructions for installing the base station and other
required components.
§Chapter 5: Programming Instructions
Programming Instructions provides programming and setup instructions for setting up the base
station and its interfaces.
§Chapter 6: Customer Support
Customer Support provides instructions for ordering parts, documentation support, and reporting
problems.
§Appendix A: Backhaul Requirements
§Appendix B: Base Station IPMessage Parameters
§Figure Listing
§Glossary
§Index

MANUAL COMPONENTS
2003 IPMobileNet, Inc. 5IPSeries MR User Manual / Rev. A / 04-September-03
Manual Use
Special icons appear throughout this manual to emphasize important information related to the chapter in
which the icons are found. The definitions for these icons are listed below.
1It is imperative that the user read this section carefully prior to continuing to the next chapter of
this user manual.
TABLE 1: ICON HELPS
ICON INDICATES DEFINITION
!NOTE This icon indicates that a note follows highlighting
or stressing a special point.
1CAUTION This icon indicates that a precautionary message
follows. Carefully read the message following this
icon and proceed with caution.
Audience
This user manual is intended for specific use by IPMobileNet, Inc. staff, dealers, and customers. This
user manual is not to be reproduced without expressed written consent of IPMobileNet Management.

CHAPTER 1: INTRODUCTION
2003 IPMobileNet, Inc. 6IPSeries MR User Manual / Rev. A / 04-September-03
Product Description
!The content of this manual applies to all frequency ranges of the IPSeries Base Stations, unless
otherwise specified. This manual will note key differences when appropriate.
The IPSeries Base Stations are intelligent devices designed for the stringent requirements of mobile data
communication systems. Intended for mounting in rack units, the base station requires very little room at
tower sites and may be connected to via Serial Line Internet Protocol (SLIP) ports or Ethernet. The base
station circuit boards are built using surface mount technology (SMT) and through-hole components. At
the minimum, the unit requires a 13.8 VDC power supply, antenna system, and high-speed data
connection to an Internet Protocol Network Controller (IPNC) system to operate. The base station is
typically teamed up with a Power Amplifier (PA) and third-party system components such as antennas,
preamplifiers, preselectors, filters, and combiners.
Figure 1: IPSeries Base Station External Illustration (Front View)
Product Functionality
The base station utilizes an internal high-performance 4-level Frequency-Shift Keying (FSK) wireless data
modem (19200 bps) for 25 kHz channel spacing, a multi-layered approach to signaling reliability,
including patented multi-receiver Intelligent Diversity Reception, dynamic scrambling, data interleaving
for burst error protection, Forward Error Correction (FEC), and Viterbi soft-decision algorithms.
The IPSeries Base Station technology includes IPMobileNet’s Diversity Reception (DR) capability.
Diversity Reception reduces the number of fades and the effects of multi-path reception. With the use of
three (3) antennas, mounted as far apart as possible on the base station tower, the Diversity Reception
System (DRS) minimizes the effects of fading. One of the antennas is likely to receive a viable signal
while the others may not. DRS minimizes fading effects by comparing the signal levels from the three (3)
antennas, and selecting the strongest signal.
!Diversity is most effective when the vehicle using an IPSeries Mobile Radio is in motion.

CHAPTER 1: INTRODUCTION
2003 IPMobileNet, Inc. 7IPSeries MR User Manual / Rev. A / 04-September-03
External Features
The base station technology is enclosed in a sturdy aluminum case.
1The product warranty becomes void if an uncertified or unauthorized individual removes the base
station cover.
Figure 2: External Connectors of an IPSeries Base Station (Rear View)
The base station’s rear external connectors consist of the following components:
TABLE 2: EXTERNAL FEATURES (Rear)
FEATURE DESCRIPTION
TX Transmitter antenna connection
RX1/RX2/RX3 Receivers 1, 2, and 3 antenna connections
Power Connector 13.8 VDC base station power connector
Serial Port 1 (DB9M) RS232 Serial Line Internet Protocol (SLIP) interface port
Serial Port 2 (DB9F) ANSI/TTY Terminal Connection (used for programming)
(9600 bps, no parity, 8-databits, 1-stop bit)
Ethernet Port RJ45 Ethernet 10 Base T interface port

CHAPTER 1: INTRODUCTION
2003 IPMobileNet, Inc. 8IPSeries MR User Manual / Rev. A / 04-September-03
Figure 3: External Features of an IPSeries Base Station (Front View)
The base station’s front external features consist of six (6) LED (light emitting diodes) indicators defined
as follows:
TABLE 3: EXTERNAL FEATURES (Front)
LED Name When lit….
TX Indicates that transmission is in progress
CD Carrier detect indicates an RF message is detected
RX1 Indicates that receiving is progress on Receiver 1
RX2 Indicates that receiving is progress on Receiver 2
RX3 Indicates that receiving is progress on Receiver 3
POWER Indicates the base station is powered on

CHAPTER 1: INTRODUCTION
2003 IPMobileNet, Inc. 9IPSeries MR User Manual / Rev. A / 04-September-03
Product Specifications
TABLE 4: PRODUCT SPECIFICATIONS
GENERAL SPECIFICATIONS
PARAMETER Specification IP100 Specification IP400 Specification IP800
frequency range 135 to 175 MHz 400 to 512 MHz 806 to 869 MHz
channel spacing / speed 12.5 kHz / 9600 bps
25.0 kHz / 19200 bps 12.5 kHz / 9600 bps
25.0 kHz / 19200 bps 12.5 kHz / 9600 bps
25.0 kHz / 19200 bps
mode of operation full-duplex, diversity reception full-duplex, diversity reception full-duplex, diversity reception
operating temperature range -30C to +60C (-22F to +140F) -30C to +60C (-22F to +140F) -30C to +60C (-22F to +140F)
power supply voltage 13.8 VDC +/-20% 13.8 VDC +/-20% 13.8 VDC +/-20%
power supply <1 amps receive <1 amps receive <1 amps receive
current consumption 16 amps transmit 13 amps transmit 8 amps transmit
number of channels 256 256 256
intelligent diversity reception triple receiver, diversity reception triple receiver, diversity reception triple receiver, diversity reception
antenna connections four (4) type N jacks
(tx, rx1, rx2, rx3) four (4) type N jacks
(tx, rx1, rx2, rx3) four (4) type N jacks
(tx, rx1, rx2, rx3)
interface connection RS232 serial port connector or
RJ45 Ethernet 10 Base T RS232 serial port connector or
RJ45 Ethernet 10 Base T RS232 serial port connector or
RJ45 Ethernet 10 Base T
dimensions (HxWxD / lbs) 1.75” X 19” X 8.2” / 9.5 lbs 1.75” X 19” X 8.2” / 9.5 lbs 1.75” X 19” X 8.2” / 9.5 lbs
regulatory FCC Part 90 and Part 15 FCC Part 90 and Part 15 FCC Part 90 and Part 15
IPTRANSMITTER SPECIFICATIONS
PARAMETER Specification IP100 Specification IP400 Specification IP800
frequency stability +/-2.4 ppm @ operating temp +/-1.5 ppm @ operating temp +/-1.0 ppm @ operating temp
emission designator 20KF01D 20KF01D 20KF01D
spurious and harmonic -61 dBc max -59 dBc max -56 dBc max
transmit power 60 watts 40 watts 20 watts
transmit attack time less than 5 ms less than 5 ms less than 5 ms
IPRECEIVER SPECIFICATIONS
PARAMETER Specification IP100 Specification IP400 Specification IP800
sensitivity (voice) 12.0 dB SINAD@
-119 dB max level 12.0 dB SINAD@
-118dB max level 12.0 dB SINAD@
-118dB max level
distortion less than 3% @ 1.0 kHz less than 3% @ 1.0 kHz less than 3% @ 1.0 kHz
spurious response 85 dBm minimum 85 dBm minimum 85 dBm minimum
intermodulation distortion 75 dB minimum 75 dB minimum 75 dB minimum

CHAPTER 1: INTRODUCTION
2003 IPMobileNet, Inc. 10 IPSeries MR User Manual / Rev. A / 04-September-03
!
Theory of Operation
Figure 4: General Block Diagram
Block Diagram Definitions
For increased data security, the modem supports the U.S. Government developed Digital Encryption
Standard (DES) data encryption and decryption protocols. This capability requires installation of third-
party Internet Protocol (IP) compliant DES encryption and decryption software.
The standard IPSeries Base Station circuit board contains five (5) main sections defined below:
Input/Output Circuitry associated with one of the following base station’s data
connectors:
qRS232 Serial Port DB9 Data Connector
qRJ45 Ethernet 10 Base T Interface Connection
!For further details on the Ethernet Controller refer to the Crystal
LANEthernet Controller Product Bulletin (CS8900A-
EthernetCtrlr.pdf) available on the Product Documentation CD.
System Controller Houses the modem, diversity, and Ethernet circuitry. Manages the
operation of the base station’s modem providing transmit timeout
protection in the event a fault causes the base station to become halted
in the transmit mode. The system controller also handles the loading of
selected transmit and receive frequencies into the injection synthesizer.
Includes memory for storage through Electrically Erasable
Programmable Read Only Memory (EEPROM) of the base station’s

CHAPTER 1: INTRODUCTION
2003 IPMobileNet, Inc. 11 IPSeries MR User Manual / Rev. A / 04-September-03
operating parameters, which are retained after the base station’s power
is cycled off.
Modems Convert data into an analog audio waveform for transmission and analog
audio from the receiver to serial data interface. There is one (1) modem
that is dedicated to the transmit operation and two (2) modems dedicated
to the receive operation. The modem dedicated to the transmit supports
a 115.2 KBPS data transmission rate on the serial port, SLIP protocol,
and a 19.2 KBPS OR 9.6 KBPS over-the-air data transmission rate.
Provides Forward Error Correction (FEC) and Error Detection (using
Cyclic Redundancy Check or CRC), bit interleaving for more robust data
communications, and third generation collision detection and correction
capabilities.
Diversity Reception Circuitry selects one of three (3) diversity receiver audio outputs for
processing by the modem by comparing the Received Signal Strength
Indication (RSSI) output from each receiver. Audio from the receiver
with the highest RSSI value is passed to the modems.
RX Injection The Injection Synthesizer board provides a highly stable local oscillator
signal for the three (3) receivers. This displays a serial data input/output
interface, synthesizer, and VCO.
Transmitter Consists of an exciter and a power amplifier module covering various
frequency bands in segments. The transmitter power control isincluded
with the power supply circuitry on the same board.
Receiver 1/Receiver 2/ Uses three (3) discrete receivers tuned to the same frequency.
Receiver 3 The three (3) receivers are required to support IPMobileNet’s base
station Diversity Reception System (DRS).
NOTE:Some installations use only two (2) receivers.
The receivers are double-conversion superhetrodynes with an
Intermediate Frequency (IF) of 45 MHz. Each receiver consists of
bandpass filters, RF amplifiers, a mixer, 45 MHz crystal filter, and a one-
chip IF system. The injection synthesizer provides the first local
oscillator signal and outputs from each receiver include RSSI and analog
audio for Diversity Reception.
Power Supply Power supply circuitry derives the various operating voltages required by
the base station. Fixed voltage regulators are employed through the
base station for this purpose.

CHAPTER 2: BASIC NETWORK CONFIGURATIONS
2003 IPMobileNet, Inc. 12 IPSeries MR User Manual / Rev. A / 04-September-03
Basic Network Configurations
This section provides basic network connection samples to help the user better understand some of the
possibilities in setting up their respective systems.
Basic Network Connection
Figure 5 depicts a basic network connection for a network inclusive of one (1) Internet Protocol Network
Controller (IPNC) and a range of base stations, mobile radios, mobile computers, and additional
components that can interface with the system.
Figure 5: Basic Network Connection
!For serial connectivity to Ethernet only systems, please refer to the IPTurbo Converter Quick
Reference Guide (IPMN p/n: 516.80496.QR) on the Production Documentation CD (IPMN p/n:
480.0001.001).

CHAPTER 2: BASIC NETWORK CONFIGURATIONS
2003 IPMobileNet, Inc. 13 IPSeries MR User Manual / Rev. A / 04-September-03
Network Connection to an Existing LAN
Figure 6 depicts network connection to an existing LAN (local area network) inclusive of one (1) IPNC,
one (1) base station, and a range of mobile radios, VIUs (voice interface units), mobile computers, and
additional components that can interface with the system. This diagram also shows a LAN VIUas well as
Terminal Server VIU.
Figure 6: Network Connection to an Existing LAN
!For serial connectivity to Ethernet only systems, please refer to the IPTurbo Converter Quick
Reference Guide (IPMN p/n: 516.80496.QR) on the Production Documentation CD (IPMN p/n:
480.0001.001).

CHAPTER 3: PRODUCT SETUP AND PRELIMINARY TESTING
2003 IPMobileNet, Inc. 14 IPSeries MR User Manual / Rev. A / 04-September-03
Base Station Setup
Intended for rack unit configuration, the base station can be installed in an existing rack or assembled into
a rack of its own.
Rack Unit Mounting
Figure 7: Base Station Mounting in the Rack Unit (Front View)
Table 5 lists the required components for a base station setup.
TABLE 5: BASE STATION COMPONENTS REQUIRED FOR INSTALLATION
QTY DESCRIPTION
1Frequency appropriate IPSeries Base Station
1Ethernet cable
15’ DC power input cable with connector
4RF coaxial cables (may require an additional cable if connecting the base station to a
power amplifier)

CHAPTER 3: PRODUCT SETUP AND PRELIMINARY TESTING
2003 IPMobileNet, Inc. 15 IPSeries MR User Manual / Rev. A / 04-September-03
Preliminary Testing
This section provides a functional preliminary test for the base station prior to installation. It is used to
determine the condition of the new base station before placing into service. If the base station is found to
be non-functional after completing this test, refer to Chapter 6: Customer Support for the appropriate
action.
!This section applies to all base station frequency ranges.
Checklist for Required Material for Preliminary Testing
The following checklist provides a list of tools required to perform this preliminary test procedure.
TABLE 6: CHECKLIST OF REQUIRED EQUIPMENT FOR PRELIMINARY TESTING OF A BASE
STATION
1
Calibrated Base Station System –Consisting of the following components:
(1) IPSeries Base Station
(2) Desktop or laptop computer configured as an Internet Protocol Network
Controller (IPNC)
(3) Corresponding IPSeries Mobile Radio tuned to Base Station frequencies (If an
IPB138 base, use IP138 mobile)
(4) Desktop or laptop computer with two (2) available serial ports and Microsoft
Windows 98 or greater, IPMobileNet Dial-Up Networking, IPMessage software,
and HyperTerminal for base station installed
2DC power supply with ammeter, with the appropriate volts, see page 9 Current Consumption
for each base station (Astron VS12M or equivalent)
3Six (6) antennas (generic mag mounts) tuned to frequency or transceiver
4Base Station power cable.
Serial Base Station Interface
No. Requirement ü
1DB9 RS232 serial cable
2IPTurboConverter (IPMN p/n: 900.00012.01)
3IPTurboConverter Quick Reference Guide (IPMN p/n: 516.80496.QR)
Ethernet Base Stations Interface
No. Requirement ü
1Ethernet RJ45 Cable
2Ethernet Crossover Cable

CHAPTER 3: PRODUCT SETUP AND PRELIMINARY TESTING
2003 IPMobileNet, Inc. 16 IPSeries MR User Manual / Rev. A / 04-September-03
Preliminary Test Procedure
Perform the following initial setup to prepare the base station for preliminary test:
Step 1 Connect the base station to the 13.8 VDC power supply.
Step 2 Power on the base station and verify that the LED’s illuminate and the power LED on the
front panel remains illuminated.
Step 3 Verify that the base station DC-supply current is <1.2 amps.
Step 4 For the ideal serial or Ethernet setup please refer to the IPTurboConverter Quick
Reference Guide (IPMN p/n: 516.80496.QR) available on the Product Documentation CD
enclosed with this product.
Step 5 Connect the antennas to the mobile radio.
Step 6 Power on the mobile radio.
Step 7 Connect the antenna to the base station’s TX port.
Step 8 Recycle the base station power.
Step 9Connect the antennas to the base station’s RX1.
Step 10 Verify that the RX1 and CD LED’s is illuminated when the mobile is attempting to
connect. Repeat Steps 9 and 10 with RX2 and RX3.
Step 11 From the Mobile PC, open the DOS prompt, then ping the IPNC with the following
command:
ping 172.16.23.200 (or replace with appropriate IPNC IP address).
Press [ENTER] and verify that the IPNC responds to the ping request. Also verify that
the base station carrier detect (CD) LED is lit followed by the TX LED.

CHAPTER 4: PRODUCT INSTALLATION
2003 IPMobileNet, Inc. 17 IPSeries MR User Manual / Rev. A / 04-September-03
Installation Overview
This chapter provides the basic setup involved in the installation process of an IPSeries Base Station.
For backhaul requirements, refer to Appendix A of this document.
1Standard considerations such as air flow clearance above the base station for heat dissipation
and ensuring adequate space exists behind the base station for the routing of cables are of
primary importance.
A minimum clearance of 1 rack space is recommended for natural convection cooling.
Adjustment points are available through holes in the base station bottom cover. Sufficient space
below the base station should exist to facilitate adjustments.
Coax, power, and interface cabling service lengths with neat routing will make the removal and
replacement of the base station easier for functional testing and maintenance purposes.
To prevent injury and damage to the base station, exercise extreme caution throughout the
installation process and follow the reminders listed below.
§Follow safety precautions for handling rack unit installations.
§Do not alter the components listed in the Installation Requirements section, unless
substituions are noted within this chapter.

CHAPTER 4: PRODUCT INSTALLATION
2003 IPMobileNet, Inc. 18 IPSeries MR User Manual / Rev. A / 04-September-03
Adjusting the Power
The power output of the base station will depend upon whether it will be used to drive an external power
amplifier or transmit directly over-the-air.
!In either case it is important to measure and set the transmitter power output using a wattmeter
and dummy load before connecting it to the power amplifier or antenna system.
The base station power is adjusted mechanically by tuning a potentiometer (pot) on the bottom of the
base station. Depending upon the model, this pot can be reached through an access hole in the bottom
cover on either the exciter board or power amplifier board. Figures 8, 9, and 10 display the Power
Adjustment Potentiometer location for the IP1B, IP4B, and the IP8B.
1Do not use a metal tool to make this adjustment, only use non-conducting alignment tools.
Equipment will be damaged if this warning is ignored.
Figure 8: Power Adjustment Potentiometer Location for the IP1B
Figure 9: Power Adjustment Potentiometer Location for the IP4B

CHAPTER 4: PRODUCT INSTALLATION
2003 IPMobileNet, Inc. 19 IPSeries MR User Manual / Rev. A / 04-September-03
Figure 10: Power Adjustment Potentiometer Location for the IP8B
Step 1 Connect a computer with the HyperTerminal utility to the base station’s monitor serial port.
!Refer to the section titled HyperTerminal Setup located in Chapter 5: Programming
Instructions for HyperTerminal Setup and access instructions.
Step 2 Launch the HyperTerminal utility.
Step 3 Locate the adjustment hole (see Figures 8, 9, or 10 according to the model being used).
Step 4 Fit the tool to the potentiometer.
Step 5 Key the transmitter on the base station by typing X=1450,10 in the HyperTerminal window.
The base station will generate 10 data packets, each 1450 bytes in length.
!If this does not work, check the base station’s MTU parameter. The X=number must
be smaller than the MTU value.
1To avoid damage to the amplifier, when setting the power to drive an external amplifier, set the
base station power below the external amplifier’s maximum drive limit.
Step 6 If setting the power to drive an external amplifier, use a wattmeter and dummy load to
measure the output power of the base and set it to the amount of drive power that is will be
needed for the amplifier.
!Be aware that the coaxial cable that will connect the base station to the power
amplifier may have completely different characteristics to the test cable used to
measure power output. If possible, adjust the power with the coaxial cable that will
be used in the system ensuring the power measured is exactly what will be fed into
the amplifier.

CHAPTER 4: PRODUCT INSTALLATION
2003 IPMobileNet, Inc. 20 IPSeries MR User Manual / Rev. A / 04-September-03
Step 7 Once the adjustment is made, connect the base station to the external amplifier and connect
the wattmeter and dummy load to the amplifier’s output.
Step 8 Measure the power output of the amplifier.
!If the amplifier does not produce the expected power, additional adjustments to the
base station output are necessary. When making large adjustments in power, the
external amplifier should be disconnected from the base station and the base
station’s power reset.
1Do not attempt to make large adjustments to the output power while the base is connected to the
external amplifier or if the external amplifier is not producing any power. The base station power
adjustment is very sensitive and it is possible to overdrive an external amplifier and ruin it with
just small movements of the power adjustment potentiometer. You must be sure to keep the
base station’s output power below the input drive limit of the external amplifier.
Step 9 Once the base station power is adjusted, reconnect the base station and the wattmeter to the
external amplifier and measure the output power of the external amplifier again using the
X=1450,10 command.
Step 10 Once the power amplifier is nearly at the proper output, small adjustments can be made to
the power output, while the base station is connected. Turning the power adjustment very
carefully while transmitting into the external power amplifier will enable the power to be
adjusted to exactly the right level.
1Be careful not to apply sideways pressure to the adjustment potentiometer, otherwise the circuit
can be damaged. Always use a light touch when adjusting base station output power.
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