TEXAS DEPARTMENT OF TRANSPORTATION

SPECIFICATION NO.

TxDOT 730-54-53454

DATED AUGUST 2026

Digital Watt Meters with Carrying Cases

PUBLICATION

This specification is a product of the Texas Department of Transportation (TxDOT). This specification may not be sold for profit or monetary gain. If this document is altered in any way, the header and all references to TxDOT does not assume nor accept any liability when this specification is used in the procurement process by any other entity.

Line item 1, Quantity 27 each:

Digital RF Wattmeter with Modulation Analysis Capability, Telewave Model 44D-LX AND rugged protective carrying case, Telewave Model TC44-RX or TxDOT or TxDOT approved equals.

Minimum Specifications:

RF Performance

• Frequency range: Minimum 118 MHz to 960 MHz.

• No external frequency elements, slugs, or band modules required.

• Forward power measurement range:

o Minimum 5 watts to 500 watts.

• Reflected power measurement range:

o Minimum 1 watt to 100 watts.

• Measurement accuracy: ±0.5 dB or better.

• Frequency counter accuracy: ±200 kHz or better.

• Coupler directivity: 20 dB minimum.

RF Characteristics

• Nominal impedance: 50 ohms.

• Main RF connectors: N-Female.

• Sample RF port: SMA-Female.

• VSWR introduced by the meter: 1.2:1 maximum.

• RF insertion loss:

o 0.02 dB maximum through 500 MHz.

o 0.04 dB maximum through 1 GHz.

• RF sample port attenuation approximately -50 dB.

Modulation and Measurement Features

• Capable of measuring both analog and digital radio modulation.

• Display shall provide RF power measurements in watts and/or dBm.

• Typical measurement settling time of five (5) seconds or less.

• Capable of measuring forward and reflected power simultaneously or through selectable display functions.

Power Requirements

• Internal rechargeable battery.

• Minimum eight (8) hours of operation on a full charge.

• Recharge time of four (4) hours or less.

• Universal AC charger supporting 100-240 VAC, 50/60 Hz.

Environmental Requirements

• Operating temperature:

o At least 0°C to +45°C while charging.

o At least -20°C to +50°C on battery operation.

TEXAS DEPARTMENT OF TRANSPORTATION

SPECIFICATION NO.

TxDOT 730-54-53454

DATED AUGUST 2026

• Humidity range:

o 35% to 85% non-condensing minimum.

Physical Requirements

• Portable field-deployable design.

• Weight not to exceed 5 pounds.

• Ruggedized carrying case included with each unit.

• All cables, charging equipment, and accessories required for operation shall be included.

Warranty

• Minimum one-year manufacturer's warranty.

Line item 2, Quantity 3 each:

Portable Analog RF Wattmeter, Telewave Model 44A AND rugged carrying case, Telewave Model TC44-R or TxDOT approved equal.

Minimum Specifications RF Performance

• Frequency range: Minimum 20 MHz to 1000 MHz.

• No external frequency elements or slugs required.

• Power measurement ranges shall include:

o 5 watts o 15 watts o 50 watts o 150 watts o 500 watts

• Capable of measuring RF power from 1 watt through 500 watts.

Accuracy

• ±6% of full scale or better from 20 MHz to 150 MHz.

• ±6% of full scale or better from 150 MHz to 1000 MHz.

RF Characteristics

• Nominal impedance: 50 ohms.

• Maximum VSWR: 1.1:1.

• Maximum insertion loss: 0.1 dB.

• RF connectors:

o Standard N-Female connectors.

• Meter shall allow connector replacement or field-serviceable connector configuration.

Mechanical Requirements

• Portable self-contained design.

• Maximum weight: 4 pounds.

• Durable construction suitable for field use.

• Ruggedized carrying case included.

Functional Requirements

• Display at least five selectable power ranges.

• No band-switching required.

• Fully operable in freezing conditions.

• Printed or included reference information for VSWR and power correction calculations.

Warranty

• Minimum one-year manufacturer's warranty.