PowerWave NTGY81AC Installation & Service Manual Download Page 1

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044-xxxxx Rev. x

INSTALLATION & SERVICE

MANUAL

MULTICHANNEL

POWER AMPLIFIER

NTGY81AC

1930-1990 MHz

50 WATTS AVERAGE POWER

04 April 2002

Powerwave Technologies, Inc.

Tel: (714) 466-1000

1801 E. St. Andrew Place

Fax: (714) 466-5800

Santa Ana, CA 92705

Web Site: www.powerwave.com

Summary of Contents for NTGY81AC

Page 1: ...RVICE MANUAL MULTICHANNEL POWER AMPLIFIER NTGY81AC 1930 1990 MHz 50 WATTS AVERAGE POWER 04 April 2002 Powerwave Technologies Inc Tel 714 466 1000 1801 E St Andrew Place Fax 714 466 5800 Santa Ana CA 9...

Page 2: ...7 Differential IIC Clock Receive and Transmit Connector P3 2 4 2 8 IIC Power Alarms and Controls Connector P4 2 4 2 9 IIC RS485 Power and Other Signals Connector P5 2 6 Section 3 Operating Instructio...

Page 3: ...ferential IIC Clock Receive and Transmit Connector P3 2 4 2 4 IIC Power Alarms and Controls Connector P4 2 4 2 5 IIC RS485 Power and Other Connector P5 2 6 4 1 NTGY81AC Multichannel Power Amplifier Fu...

Page 4: ...2 GENERAL DESCRIPTION The NTGY81AC is a linear multichannel power amplifier that operates in the 60 MHz frequency band from 1930 MHz to 1990 MHz It is designed to be mounted in an enclosure with EMI...

Page 5: ...Input Port Return Loss VSWR 2 1 Max Out of Band Spurious Less than 15 dBm 1 MHz DC Input Power 26 0 5 Vdc 260 mV p p max ripple 500 watts Operating Temperature 15 C to 85 C heatsink temperature Storag...

Page 6: ...044 xxxxx Rev x 1 3 P1 P4 P5 P3 P2 RF OUT RF IN Figure 1 1 NTGY81AC Multichannel Power Amplifier...

Page 7: ...the whole installation Circuit breakers should be thermal type capable of handling the maximum anticipated inrush current in a load center with a master switch 2 3 UNPACKING AND INSPECTION This equip...

Page 8: ...es to matching P1 through P5 connectors Refer to paragraphs 2 5 through 2 9 following 6 Check your work before applying DC voltage to the system Make certain all connections are tight and correct 7 Me...

Page 9: ...6V_ALARM 26V HPCA alarm input 4 15V_ALARM 15V HPCA alarm input 5 REMOTE_SENSE Remote sense for HPCA connected directly to 26V supply 6 REMOTE_SENSE_RTN Remote sense return for HPCA connected directly...

Page 10: ...N SIGNAL DESCRIPTION 1 IIC_CLK Differential IIC Clock to the DPM 2 IIC_CLK Differential IIC Clock to the DPM 3 IIC_RX_DATA Differential IIC Receive Data from DPM 4 IIC_RX_DATA Differential IIC Receive...

Page 11: ...Default status is OPEN upon power up and CLOSED on power down conditions 9 AUX_CTRL2 Contact closure switch on the MCPA but controlled by the MFRM software Default status is OPEN upon power up and CLO...

Page 12: ...l RS485 link to MTRM 7 MCPA_RX Differential RS485 link from MTRM 8 MCPA_RX Differential RS485 link from MTRM 9 IIC_CLK Differential IIC clock from MTRM 10 IIC_CLK D Di if ff fe er re en nt ti ia al l...

Page 13: ...les are properly connected CAUTION Before applying power make sure that the input and output of the amplifier are properly terminated at 50 ohms Do not operate the amplifier without a load attached Re...

Page 14: ...requirements of FCC Part 24 with respect to spurious emissions see table 1 1 Constant gain is maintained by continuously comparing active paths with passive references and correcting for small variati...

Page 15: ...tion board which gathers the status information of the amplifier and reports to the host system via the RS485 interface when instructed It also protects the MCPA from adverse conditions such as overpo...

Page 16: ...enance requirements are listed in Table 5 1 Table 5 1 also lists the intervals at which the tasks should be performed Table 5 1 Periodic Maintenance TASK INTERVAL ACTION Inspection Cables and Connecto...

Page 17: ...5 1 5 4 1 AMPLIFIER PERFORMANCE TEST To perform the test proceed as follows 1 Connect test equipment as shown in figure 5 1 NOTE Do not apply any RF signals at this time AMPLIFIER SPURIOUS EMISSIONS T...

Page 18: ...044 xxxxx Rev x 5 3 Figure 5 1 NTGY81AC Amplifier Test Setup Diagram...

Page 19: ...lyzer Span 60 MHz Marker 1 1930 MHz 2 1960 MHz 3 1990 MHz TEST CONDITION MIN MAX FREQUENCY MHz 1 00 NETWORK ANALYZER 1930 1960 1990 1 01 Gain 45 0 dB 49 0 dB 1 02 Gain Flatness 0 dB 0 4 dB 1 25 MHz 1...

Page 20: ...r equipment To replace a power amplifier module proceed as follows 1 Turn off 26 Vdc power to that specific module 2 Disconnect the two RF cables and connectors P1 through P5 3 Remove 13 screws that s...

Page 21: ...perative 1 Check for proper power supply voltage MCPA Not Enabled 1 Verify HPA Allow Enable line is high Alarm Output is RS 422 High Verify input RF is within specified power and frequency limits 6 3...

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