User's Manual

FCC ID: MI7-ECSHPA80TX
A10
Sheet 6 of 6.
Power combiner section. Three hybrid couplers are shown here. The
purpose of these devices is to combine the RF outputs from the power amplifier modules
in phase.
Capacitor C23 and transmission line TRL1 form a tuned stub which reduces harmonic
emissions. An isolator protects the power amplifiers from damage if a high VSWR load
is connected. An external harmonic filter (not shown) attached to the RF OUT connector
provides an additional measure of harmonic suppression.
5. Maintenance
The HPA8 High Power Amplifier has modest maintenance requirements. However, for
long, trouble free life, it is important to assure good, unobstructed airflow through the
unit. Keep the following maintenance items in mind when working with the unit.
•
Periodically inspect the heatsink and fan grille for dust build-up. Clean with a soft
brush and a vacuum cleaner when necessary.
•
Inspect the connectors and verify they are tight.
6. Specifications
Published specifications for the HPA8 High Power Amplifier:
PARAMETER SPECIFICATION
Frequency Range 851 - 866 MHz
Output Power 80W minimum, 851-866 MHz
Duty Cycle 100%
Power Gain 29 dB nominal
Power Supply
Voltage 13.8 VDC nominal (16 VDC maximum)
Power Supply 0A standby
Current 20A transmit at 80W output
RF Input Power 100 mW nominal
RF Connectors Two type “N” female jacks (RF in/RF out)
Load Mismatch
Tolerance Infinite
Temp. Range,
Operating -30
o
C to +60
o
C (-22
o
F to +140
o
F)
Size 7.0” H x 7.38” W x 11.0” D (incl. J1, J2)
Weight 11.5 lbs
Emission Designator F1D