Paradigm MAF 900-60S User Manual

MAF 900- 60S

MULTI- CARRIER

POWER

AMPLIFIER

USER MANUAL

Table Of Contents

Page
Section 1 No.

General Description......................................................................................1

Section 2

Specifications................................................................................................2

Mechanical Specifications ............................................................................3

Environmental Specifications .......................................................................4

Section 3

Multi-Carrier Power Amplifier Principals of Operation...............................5

Principals of Operation.................................................................................6

Principals of Operation.................................................................................7

Section 4

Operating Instructions...................................................................................8

Section 5

Installation Instructions.................................................................................9

Installation Instructions................................................................................10

Installation Instructions................................................................................11

Section 6

Maintenance.................................................................................................12

Maintenance.................................................................................................13

Maintenance.................................................................................................14

Maintenance.................................................................................................15

Maintenance.................................................................................................16

Section 7

Troubleshooting ...........................................................................................17

1

Section 1 Amplifier System Description

Introduction

This manual contains information and specifications of Paradigm Wireless Systems MAF
900-60S Multi-Carrier Power Amplifier. The purpose of this manual is to familiarize the
user to the basic operation and specification of the product. Any misuse of information
may lead to partial or total damage to the amplifier. This manual is organized into the
following sections:

Section 1 Amplifier System Description Section 6 Maintenance
Section 2 Amplifier Specifications Section 7 Troubleshooting
Section 3 Principals of Operation
Section 4 Operating Instructions
Section 5 Installations

1.1 General Description

The Paradigm Wireless Systems MAF 900-60S Multi-Carrier Power Amplifier (MCPA)
is designed to operate in the 5 MHz frequency band of 935 MHz to 940 MHz. The MAF
900-60S amplifiers are designed for 2-way paging radio transceiver base stations using
GMSK modulation. The MCPA is designed to integrate with a sub-rack system. Total
composite output power is 80 Watts from the MCPA.

The MCPA draws +27 Vdc power from the sub-rack. The LED on the front panel of the
MCPA will be GREEN during normal operation. Any alarm condition will turn the LED
to RED or AMBER. This will indicate an alarm condition within the MCPA. External
alarms for connecting to the base station will be sent via the D-subminiature connector
through the sub-rack. These are dry contact or RS485.

Fans are used to cool the heat sink to ensure unit performs to specification over the
temperature range. Air is pulled from the front of the amplifier and exhausted through the
back of the sub-rack. Over temperature alarms will shut down the MCPA when the heat
sink temperature reaches 95°C. The amplifier will auto restart when heat sink
temperature decreases to 75°C. This will prevent thermal run away of the MCPA.

Each MAF 900-60S MCPA will generate 1900 BTU of heat at full power. Proper cooling
and ventilation is essential for continuous operation of the amplifier.

2

Section 2 MAF 900-60S Amplifier Specification

The MAF 900-60S MCPA series electrical specification:

Frequency Range 935-940 MHz

Channel Spacing 25 kHz

Input Power +5 dBm

Output Power 80 Watts (49.00 dBm)

Gain +58 dB

Gain Flatness

Normal Operating Voltage +27 Vdc

Current Consumption 27.5 Amps @ 80 Watts Power Output

Abnormal Operating

Voltage

Efficiency 10.77 %

RF Gain Variation over

Temperature

Gain Variation over

Dynamic Range

IMD -65 dBc min @ 25 kHz channel spacing, 75 Watts

Modulation Type GMSK

Output Return Loss -14 dB minimum

Output Protection Mismatched Protected

Output Isolation 20 dB minimum

MCPA Front Panel Switch CKT Breaker +27 Vdc Power Indicator

±0.2 dB

<24 Vdc
>28 Vdc

±0.5 dB @ 0°-60° C. +27 Vdc
±0.5 dB over 20 dB +27 Vdc

-63 dBc min @ < 24 Vdc to > 28 Vdc

3

MAF 900-60S MCPA series mechanical specifications:

Physical Dimension of MCPA 13.82 in. high x 3.90 in. wide x 17.0 in. long
Weight 31.5 lbs.
Connector Type D-Sub, Hybrid, Plug-in Type RF Connector: PKZ 26-

0020 series straight plug (Phoenix Co.)

Connector Description Pin Outs

A1 RF Input (Coaxial Contact)
A2 Ground (Power Contact)
A3 +27 Vdc (Power Contact)
A4 RF Output (Coaxial Contact)

1 RX + 10 Reset
2 RX - 11 Reserved
3 GND 12 Reserved
4 TX + 13 Amp Address #1
5 TX - 14 Amp Address #2
6 GND 15 Amp Address #3
7 LPA Detect 16 Reserved
8 Summary 17 Reserved

9 DC ON/OFF
Font Panel LED Display LED type: SMD
RUN GREEN (MCPA enabled for operation)
ALARM Major RED (MCPA disabled MAJOR alarm occurred LED is

ON)
ALARM Minor AMBER (MCPA enabled MINOR alarm)
ALARM Major RED (MCPA disabled)
ALARM Minor GREEN Blinking (MCPA Standby)
ALARM Definition (Major) Over Power, Over Temperature, Loop Fail, DC Fail
ALARM Definition (Minor) VSWR
FCC ID TBD
MCPA Captive Fasteners Spring loaded, positive alignment

4

MAF 900-60S MCPA series environmental specifications

Operating Temperature

Storage Temperature

0° to 60° C.

-40° to 80° C.

Relative Humidity 5%-90% RH (non-condensing)

Operating Air Pressure 860 to 1060 mbar

Shock 40 m/s s* @ 22 ms half sinusoid shock

Pressure

Vibration

Integral forced air cooling must operate
correctly at up to 0.3 back
Bellcore TR-NWT-000063 (1 m/s*0.1
∼200 Hz)
The MCPA shall comply with the

Corrosion Resistance/Salt Fog

requirements of Bellcore Technical
Reference TA-NWT-000487, Issue 2
Section 4.12

All specifications shall be met at an altitude
up to 15,000 feet where the maximum
external ambient temperature is decreased

Altitude

by 0.5 C/1000 feet above sea level. The
MCPA shall not sustain damage when
being transported at altitude up to 40,000
feet or uniformly applied pressure to 30
PSIA.