TPL Communications 81AA User Manual 8

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Document ID	20089
Application ID	DH5WP6QAZQZZaBYdBGeDEw==
Document Description	8
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	9.66kB (120783 bits)
Date Submitted	1999-01-19 00:00:00
Date Available	1999-03-22 00:00:00
Creation Date	2001-07-07 12:12:19
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Document Lastmod	2001-07-07 12:12:20
Document Title	8

08 December 1998
FCC 11): BBDSIAA
APPENDIX B
OPERATING/ SERVICE! INSTRUCTION MANUAL
ijpl
COMMUNICATIONS
SERVICE
IIIANUAL
PA8—1AA
RF POWER
AMPLIFIER
3370 SAN FERNANDO RD.. #206
LOS ANGEL“, CA 90065
TEL: (323)-256-3000 FAX: (323)-254-3210
E Hall: eleetmnlc@eomputem.com
LPN-1MW
POWER AMPLIFIER SPECIFICATION
PA8-1AA
Frequency: 806-866 MHz
Voltage: 1146.6 VDC
Input Power: 1-3 Watts
Output Power: 13-25 Watts
Mode: FM
Frequency 806 MHz
Rnnge
Standby current
drain
Transmit
current drain
Receive path
lttenultion
Measured from RF
output connector to
RF input Connector
Carrier Output
Power Rating @
SW
Carrier Output
Power Rating @
lW
Transmitter
Stability into
VSWR
Reflected power
3 Watt input,
power reflected
back to the
BRIEF THEORY OF OPERATION
The PAS - IAA RF Power Amplifier is design to amplify an RF signal with a frequency
7 range of 806 - 866 MHz from 1-3 Watts to 12-25 Watts on its output.
The amplifier is a part of a simplex system therefor in transmit mode the amplifier amplifies
an output signal of a mnsceiver m an antenna. In the receive mode it creates a path from an
~~ antenna back to transceiver. There are no tanning components in the amplifier. It is designed
to cover its specified frequency range.
CIRCUIT DESCRIPTION.
The amplifier is comprised of a few main blocks ( Block Dia. #102167) - a brief description
of each follows
RF Sensor.
This circuit senses a presence of an RF signal from transceiver on the input of the amplifier.
When RF signal is detected by the directional coupler Z5, Z6 and an RF detector D6, D7 it
activates transistors 02 and Oil The transistor 01 applies a bias voltage (Vb) no the Power
Amplifier module and Solid State Antenna Switch Relay.
RF Power Amplifier
This stage provides approximately 10 db gain utilizing an RF hybrid module (U l) with input
and output impedance of 50 Ohms The attenuator ATT] insures a proper drive level for the
RF hybrid module Ul. Pins 3 and 4 ofUl are connected to regulated voltage Vr from the
Power Supply circuit and pin 2 is being controlled by voltage Vb from the Carrier Operated
Solid State Relay. The voltage Vb establishes O N / 05 state of U1.
DC isolation is accomplished by L5, L6, L7 and by-pass capacitors Cl3 - C23,
There are no running components. The Power Amplifier circuit is designed for specified
broadband operation.
Low Pas: Fllter 1 (LPFI) and Low Pass Filter 1 (LPFZ)
The LPFl (Z7, Z8, C24, C25, C35, C26) is a Chebyshev 5 pole low pass filter and LPF2 (Z9,
C11, C12) is a 3 pole providing 35 - 47 dB and 15 - 25 dB respectively ofattenuation of
frequencies at the 2“ harmonic and above.
Carrier Operated Solid State Relay (Antenna Switch Relay)
This circuit is directing the RF signal through the proper path in Tx and Rx mode.
In Tx mode RF inmrt signal from a transceiver is directed through forward biased PIN diode
D1 to the Power Amplifier. The output signal from the LPFl through also forward biased D4
is connected to RF output connector. In Rx mode there is no bias voltage applied to PlN
diodes which creates a signal path through C10, Z4, 23, C5, Z2, 21 and C1 from autenm
to transceiver,
Power Supply and Transient Voltage Suppression circuit
The Power supply is providing the regulated supply voltage Vr to the rest of the circuitry.
It consists of the low dropout voltage regulator U2 and high current pass transistor Q3.
DC isolation of the Vcc voltage is accomplished through LS, C28, C34.
C36, C27, C33 are by-pass The D5 is a tenet transient voltage suppressor which protects
the RF Power Amplifier from high voltage, high energy transients.
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SERVICE
For servbu on this amplifier, conhct:
TPL COMMUNICATIONS
Customer Ssrv|co Department
PHONE: (323) 256-3000 (600) HI POWER
FAX: (323) 354-3210
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