NuWaves NUPOWER LS75T01 Manual de usuario

USER MANUAL

NUPOWERTM LS75T01

L- &S-BAND POWER AMPLIFIER

PART NUMBER:

NW-PA -LS-75-T01

NuWaves Engineering

132 Edison Drive

Middletown, Ohio 45044

PH: 513-360-0800

FAX: 513-539-8782

www.NuWaves.com

product.sales@nuwaves.com

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LS75T01 User Manual

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1NUPOWERTM PRODUCT LINE OVERVIEW

The NuPower family of solid state RF power amplifier (PA) modules is designed to meet the demanding

needs of the Aerospace & Defense, Industrial, and Commercial markets. Based on the latest gallium

nitride (GaN) technology, NuPower’s power efficiency and miniature form factor make it ideal for size,

weight, and power-constrained broadband RF telemetry and tactical communications systems.

1.1 NUPOWERTM PRODUCT LINE HIGHLIGHTS

•High Performance: Unique combination of broadband coverage, miniature form factors, and

high efficiency.

•Enclosures: The NuPower family of power amplifiers is housed in an aluminum enclosure with

mounting holes incorporated into the chassis.

•Completely Characterized: The NuPower family of solid-state power amplifiers has been

completely characterized over temperature, voltage, and frequency. These high-performance

modules offer significant value for the OEM user or the Systems Integrator.

•User Friendly: Over-Voltage protection and regulator thermal shutdown provide defenses

against user interface issues.

•High Reliability: NuWaves’ selection of conservatively rated components provides high

reliability. Each NuPower is inspected to IPC-A-610 Class II quality standards. NuWaves’ Quality

Management System is AS9100:2016 Rev D and ISO 9001:2015 certified.

•Applications: Broadband RF Telemetry •RF Communication Systems •Electronic Warfare •

Unmanned Aircraft Systems (UAS) •Unmanned Ground Vehicles (UGV) •Unmanned Surface

Vehicles (USV) •Software Defined Radios • Test Labs

•Available Options:

oFan-cooled heat sink with 28V operated fan

oLabeled interface cable with banana jack plugs

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LS75T01 User Manual

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2NUPOWERTM LS75T01 PA OVERVIEW

The NuPowerTM LS75T01 PA is a highly efficient, solid state power amplifier that provides 75 Watts (typ)

of RF power across the frequency range of 800 MHz – 2500 MHz.

Based on the latest gallium nitride (GaN) technology, NuPower L-Band power efficiency and <31 in3

form factor make it ideal for size, weight, and power-constrained broadband RF telemetry and tactical

communication systems.

The NuPowerTM LS75T01 ruggedized chassis allows the system integrator to easily incorporate the unit

into a platform operating in harsh environments with limited space, such as small Unmanned Aircraft

Systems (UAS).

Figure 1: NuPower LS75T01 Functional Diagram

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2.1 NUPOWER LS75T01 PA SPECIFICATIONS

The subsequent tables in this section outline the NuPower LS75T01’s performance specifications.

Table 1: NuPower LS75T01 Electrical Specifications

Parameter Specification

Frequency Range 800 MHz to 2500 MHz

RF Output Power 75 Watts (typ)

Output Power @ 1 dB Compression

32 dBm @ 800 MHz

43 dBm @ 1500 MHz

40 dBm @ 2500 MHz

RF Gain 48 dB (typ)

Input VSWR 1.9:1 (typ)

Output Mismatch

(No Damage) 10:1

Nominal Input Drive Level 0 dBm

Maximum Input Drive Level

(No damage) +15 dBm

Harmonic

2nd: ≤-23 dBc (typ)

3rd: ≤-30 dBc (typ)

Third Order Intercept Point

(Two tone test at 1 MHz spacing,

Pout = 20 dBm / tone)

TBR

Switching Speed 2 µS (max)

Operating Voltage +27 to +32 VDC

Operating Current 7 A @ +28 VDC (typ)

Module Efficiency 40% (typ)

Power Amplifier Enable RF Enable Grounded

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LS75T01 User Manual

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Impedance 50 Ω

Table 2: NuPower LS75T01 Environmental Specifications

Operating Conditions Specification

Operating Temperature -40 to +60 oC (ambient)

-40 to +85 oC (baseplate)

Storage Temperature -55 to +85 oC

Table 3: NuPower LS75T01 Mean Time Between Failure (MTBF)

Conditions Hours

Ground Benign (GB) 292,657

Airborne Inhabited Cargo (AIC) 14,955

Airborne Inhabited Fighter (AIF) 11,976

Airborne Uninhabited Cargo (AUC) 4,994

Airborne Uninhabited Fighter (AUF) 4,108

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2.2 NUPOWER LS75T01 PA MECHANICAL SPECIFICATIONS

Figure 2: NuPower LS75T01 Mechanical Outline

Table 4: NuPower LS75T01 Mechanical Specifications

Parameter Specification

RF Connectors SMA (female)

Control / Power Interface Connector 15 Pin Micro-D (socket)

Dimensions (L x W x H) 10.0” x 5.0” x 0.61”

Weight 1.3 lb.

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LS75T01 User Manual

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2.3 HEAT SINKING

The NuPower LS75T01 is offered as a stand-alone module or with an accessory kit

(p/n NW-PA-ACC-KT03), which includes a 28 VDC fan-cooled heatsink and requisite power cable. [The kit

also includes an upgraded module interface cable assembly, labeled and terminated with banana plugs.]

Figure 3: The NuPower PA Kit offers “out-of-the-box” operation for the user. The 28 VDC fan-cooled

heatsink is shown with the NuPower LS75T01 mounted.

Caution: The use of external heat-sinking is required especially for those applications

requiring high duty cycle operation (e.g. continuous wave) or for extended on-time testing.

Operation without a proper heat sink under these conditions will cause permanent damage

to the product and will void the product warranty.

The maximum operating temperature is 85˚ C (baseplate).

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3SETUP AND OPERATION

This section provides specific details for proper operation of the NuPower LS75T01 module. Following

these guidelines will prevent damage to the power amplifier or external equipment.

3.1 POWER SUPPLY REQUIREMENTS

To operate the NuPower LS75T01, ensure that the power supply has adequate overhead to source the

current demand of the RF power amplifier. The power supply source must provide a typical voltage of

+28 VDC with greater than 10 amps capability.

3.2 CONNECTING A PROPER LOAD TO THE ANTENNA TERMINAL

To prevent damage to the PA, the antenna terminal must be terminated into a 50 Ωload. Examples of a

proper load include:

•Directly connecting to an antenna specified for the frequency range (800 MHz to 2500 MHz).

Connecting to an inappropriate antenna may result in damage to the PA module.

•Connecting to a proper antenna through a 50 Ωtransmission line or coaxial cable. Avoid using

damaged cables or corroded connectors while attaching the unit to an antenna.

•Terminating the antenna terminal into a 50 Ωpower attenuator with minimum 20 dB

attenuation.

•Connecting to a load capable of dissipating the RF power from the PA module. Loads capable of

handling >125 Watts (min) are recommended.

3.3 POWERING-UP THE NUPOWER LS75T01

The NuPower LS75T01 must be terminated to a proper load before power is applied. Refer to Section

3.2 for the specifications of the proper load. After the PA is properly terminated, the interface cable can

be connected to the unit and power can be applied. The PA is now ready for operation.

3.4 TRANSMIT TURN-ON TIME

Caution: Do not apply transmit data until the PA module is at full power. This will prevent

loss of data at the beginning of a message.

The NuPower LS75T01 is at full power approximately 1 µS after the RF Enable line goes low (ground).

Therefore, transmit data can be applied to the input after 1 µS without loss of data.

3.5 RF OUTPUT POWER VS. SUPPLY VOLTAGE

The NuPower LS75T01 was designed for +28 VDC operation.

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LS75T01 User Manual

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4HARDWARE INTERFACE

•The RF Input connector is SMA (female).

•The RF Output connector is SMA (female).

•The pin-out definitions for the 15 pin Micro-D socket connector are provided in Table 5. In a

typical installation, the PA module is mated to a host controller board via a cable harness.

The RF Out SMA is the antenna connection. This connection should

always be

loaded into 50 Ω, otherwise the PA could be damaged.

4.1 INTERFACE CABLE HARNESS

The cable harness that connects the host controller to the 9 pin Micro-D connector of the NuPower

LS75T01 is made up of 9 wires.

Table 5: NuPower LS75T01 Interface Pin-Out Definitions

Pin No. Pin Name I/0 Description

Pins 1-6 V Supply I Primary Power (+28 VDC)

Pins 9-14 GND I Signal and Power Ground

Pin 7* – Temp Flag 1

Pin 8 – Temp Flag 2

Temp Flag O Over-temp Indicator

(Low = temperature fault)

Pin 15 RF Enable I Transmit Control

*Do not connect the Temperature Flag to DC Power (+28 Volts input). The Temperature Flag can be used

to monitor thermal shutdown.

4.2 DC POWER

The nominal supply voltage for the NuPower LS75T01 is +28 VDC; The acceptable supply voltage range is

+27 to +32 VDC.

4.3 GROUND

The signal and power grounds are tied together in the PA module.

4.4 RF ENABLE

This signal is the logic control input that designates whether the unit is in transmit or standby mode. The

RF Enable line is pulled high internally placing the PA module in standby mode. If the pin is left floating

(i.e. not connected), the unit will default to standby mode.

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LS75T01 User Manual

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Grounding the pin (i.e. a voltage below +0.2 VDC) places the unit in transmit mode. The user can either

connect the RF Enable line to pins 1, 2, 6 & 8 on the CTRL/PWR interface connector, or an open drain

logic line capable of sinking 500 µA to place the unit in transmit mode.

4.5 TEMP FLAG

This signal is an output to indicate an over-temperature condition in the NuPower LS75T01. A logic high

(+5 VDC) indicates normal operation, while a logic low (0 VDC) indicates an over-temperature condition.

The NuPower LS75T01 incorporates internal logic circuitry that turns off the DC bias to the RF

transistors.

Caution: The amplifier should be shut down and allowed to cool off when the over-

temperature flag is set low to avoid damage to the module.

Do not connect the Temperature Flag to DC Power (+28 Volts input). The Temperature Flag

can be used to monitor thermal shutdown

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