Related Manuals for TELEWAVE 44L1
Summary of Contents for TELEWAVE 44L1
- Page 1 Model 44L1/L1P BROADBAND RF WATT METER Operation Manual 48421 Milmont Dr Phone 408-929-4400 Fremont, CA 94538 sales@telewave.com www.telewave.com support@telewave.com Copyright © 2024 Telewave.io.
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Page 2: Table Of Contents
Telewave.io 44L1/L1P Operation Manual MODEL 44L1/L1P BROADBAND RF WATTMETER DESCRIPTION AND OPERATION Table of Contents Specifications ..........................3 General Description ........................4 Physical Description ........................6 Functional Description ........................8 Operation ..........................10 IMPORTANT ..........................10 Maintenance ..........................14 Reference ..........................18 Copyright ©... -
Page 3: Specifications
These are provided to assist the user in formulating acceptance criteria, determining applications, and for periodic recalibration of the instrument. Minor deviations from these specifications which do not affect performance of the Model 44L1/L1P Wattmeter should not be considered a warranty issue. -
Page 4: General Description
AC power or batteries. A carrying case (Model TC44) is available as an option. The Model 44L1/L1P is ideally suited for mobile, marine, and aircraft applications as well as base stations. - Page 5 Telewave.io 44L1/L1P Operation Manual Figure 2-1: Model 44L1/L1P Broadband RF Wattmeter Controls and Indicators Copyright © Telewave.io. Page 5 of 20 Specifications subject to change without notice www.telewave.com 1-408-929-4400 240826 sales@telewave.com support@telewave.com...
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Page 6: Physical Description
Telewave.io 44L1/L1P Operation Manual Physical Description The controls and indicators of the Model 44L1/L1P Broadband RF Wattmeter are illustrated in Figure 2-1, and the functions of these elements are described in Table 3-1. Table 3-1 : Model 44L1/L1P Description Key Item... - Page 7 Telewave.io 44L1/L1P Operation Manual Figure 3-1: Model 44L1/L1P RF Wattmeter Schematic Table 3-2 : Model 44L1/L1P Parts List DESCRIPTION MFG P/N CU1,2 COUPLER HEAD ASSEMBLY TELEWAVE 7988 METER: 20 UA TRIPLETT 7034 KNOB RAYTHEON MS-91528-1P2B SCREW: BUMPER 6-32 TELEWAVE TB44...
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Page 8: Functional Description
This provides protection for the sensitive meter when the instrument is being transported. Model 44L1/L1P provides an RF sampling port with an output of -40 dB (+/- 2 dB) below the transitional line level to use for measurement of frequency, spectrum analysis, to inject a signal for measurement of receiver sensitivity, or other applications. - Page 9 Telewave.io 44L1/L1P Operation Manual Optional Accessories The table below lists the most common accessories for the Model 44L1/L1P Wattmeter. Consult the current price list or our website for current pricing. Part Number Description TC44 Leather carry case with accessory pouch...
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Page 10: Operation
Telewave.io 44L1/L1P Operation Manual Operation Unpacking After the Model 44L1/L1P Wattmeter arrives, examine the shipping container for visible loss or damage. Carefully unpack the wattmeter and examine the exterior for damage. IMPORTANT The Model 44L1/L1P Wattmeter is carefully tested, inspected, and packed before leaving the Telewave.io factory. - Page 11 Telewave.io 44L1/L1P Operation Manual Forward Power Measurement The following procedure will assist the user in making an incident or forward power measurement. Refer to Figure 2-1. Step Procedure Set the Mode Switch to the FWD position. Apply RF power to the transmission line.
- Page 12 Telewave.io 44L1/L1P Operation Manual VSWR Calculation The following procedure will assist the user in determining the Voltage Standing Wave Ratio. Step Procedure Perform the procedures outlined in 5.03 and 5.04. Record the true incident and reflected power. Refer to the VSWR Chart on the rear of the instrument or Figure 7-1.
- Page 13 VSWR. Since the impedance on either side of 1/2 wavelength is identical, the jumper cable added to the input or output of the Model 44L1/L1P should be of an appropriate length to equal 1/2 wavelength at the frequency of operation, thus eliminating any error due to the additional length.
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Page 14: Maintenance
A Return Material Authorization (RMA) is required when products are returned to Telewave.io. The following information will be requested in order to assign an RMA: The Model 44L1/L1P serial number. The ID plate is located on the top of the instrument. Include the date of purchase and Purchase Order number if known. - Page 15 Telewave.io 44L1/L1P Operation Manual Figure 6-1: Adjustment Potentiometers and Parts Location REVERSE RANGES FORWARD RANGES 5 watt range 5 watt range 15 watt range 15 watt range 50 watt range 50 watt range 150 watt range 150 watt range 500 watt range...
- Page 16 Calibration / Adjustment Requirements and Equipment The ambient temperature during calibration must be 72.4 degrees. The Telewave.io meter must be calibrated in the intended operating position, either vertical or horizontal. Meters are calibrated by Telewave.io in the vertical position. The Telewave.io wattmeter and any interconnections must use only Type N connectors.
- Page 17 Set the wattmeter RF Range Switch to the 5 watt range. Set the RF source to 4 watts output. Adjust R1 until the Telewave.io wattmeter reads 4 watts. Set the wattmeter RF Range Switch to the 15 watt scale. Set the RF source to produce 11 watts output.
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Page 18: Reference
Telewave.io 44L1/L1P Operation Manual Reference Part 7 contains additional data for the Model 44L1/L1P RF Watt- meter which is helpful in making low-frequency and VSWR measurements. Figure 7-1 (below) shows a nomograph for estimating VSWR from the measured incident and reflected power. - Page 19 Telewave.io 44L1/L1P Operation Manual Figure 7-2 shows a chart for a jumper cable to be used inline with the Model 44L1/L1P Wattmeter to minimize potential measure- ment errors in systems with high VSWR. The chart shows lengths for a 50-ohm, RG-213 jumper cable, including N connectors, using a velocity factor of 0.66 for the cable and connectors.
- Page 20 Telewave.io 44L1/L1P Operation Manual PRODUCT WARRANTY Products sold by Telewave.io and covered by this Warranty are warranted to be free from defects in material and workmanship at the time of and for a period of one (1) year after delivery to the Buyer.
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