FCCID.CO- FCC ID Database
HomeCompaniesEquipment ClassesSearch

© 2026 FCC ID Database. All rights reserved.

AboutContactData sourced from FCC public records
  1. Home/
  2. Crescend Technologies LLC/
  3. CWWP5XXUH1

CWWP5XXUH1UHF 50W AMPLIFIER

Crescend Technologies LLC
UHF 50W AMPLIFIER - FCC ID CWWP5XXUH1 - Crescend Technologies LLC
Click to zoom

Application Details

Equipment Class
AMP - Amplifier
Date of Grant
Aug 14, 2011
Application Purpose
Original Equipment
Date of Application
Aug 14, 2011
Equipment Note
UHF 50W AMPLIFIER
Frequency Range
470.00000000 - 512.00000000
Company
Crescend Technologies LLC
Country
United States

Documents & Files

Select a file to view

Users Manual

↗

Cover Letter(s)

↗

External Photos

↗

ID Label/Location Info

↗
↗

Internal Photos

↗

RF Exposure Info

↗

Test Report

↗

Test Setup Photos

↗

Document Text

Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.

Users Manual

P5XXUH1 Power Amplifier User’s Manual 1. General Information. Power Amplifier (PA) is a AB/C-class unit. It is intended for amplification of single carrier phase (frequency) modulated (manipulated) narrowband signals. The working frequency range lays between 450 MHz and 512 MHz for UH unit. Code “xx” shows the input power range: Code: R1 R2 R5 1 2 5 10 20 Range, W: 0.1-0.2 0.2-0.5 0.5-1.0 1.0-2.0 2.0-5.0 5.0-10 10-20 20-50 In the normal operating mode the minimum output power is 50 W. Input VSWR is not greater than 1.8:1. PA meets all FCC requirements to harmonic and spurious levels. The nominal power supply voltage is 13.8VDC. DC current consumption does not exceed 12.5A at 13.8V Working ambient temperature range lies from -30 ºC to +60ºC. Input and output power levels are set up in the factory. Customer has an opportunity to reduce the output power, adjusting the special trimmer resistor in the unit, or picking up the value of outer resistor, connected to PA control pin. PA has automatic power control loop that provides the stability of output power during the normal operation and all necessary changes of power in the case of load mismatch or unit overheating. PA is intended for rack mounting in the standard 19” cabinet. The front panel is 7” high. The deepness of unit does not exceed 5”. Four LED at the front panel indicate the status of unit operation. The hole in the side wall gives an access to the trimmer resistor, which allows reducing the output power against the set value. There are two N connectors at the back of chassis. There is power filtering DC connector at the back of chassis with two # 6-32 screws for “+” pole and for “-“ pole. There are 3 filters at the back of chassis that bring alarming signal, as well signals for the outside power control. The fan at the back side of unit performs the forced air cooling. Fan starts rotating, when RF signal comes to the unit input. 2. Installation Guide. 2.1. Unit installation shall provide a proper air access to the unit; no obstacle for air is allowed closer than 3” from fan. 2.2. Copper wires # 12 AWG shall be use in DC power line. Wires shall be crimp to ring terminals. 3. Operation Guide 3.1. Power supply voltage shall be in the range 13.8 V + 1.0 V. 3.2. The input power inside the working frequency range shall be within the listed above limits. It is prohibit applying any RF signal out of the working frequency range with a power, greater than 10% of the minimum rated one. 3.3. Green LED “DC ON” is on, when DC voltage is applied to the unit. 3.4. Red LED “LOW POWER” is on, when the output power drops below 80% - 85% of set level. In majority of cases, it warns about of inside problem. However, the output power may fail due to high load VSWR (in that case, LED tells that the power decrease is stronger, then it is needed for VSWR protection). 3.5. Red LED “HIGH VSWR” is on, when the load VSWR exceeds 2.4 – 3. The output power is reduced. 3.6. Red LED “HIGH TEMP” is on, when the heatsink temperature is over +85 ̊C. Then the unit operates with output power, reduced to about 75% of rated one. Fans are running continuously, no matter, is RF drive applied or not. 3.7. Voltage at filter “ALARM” is about 9.5V during the normal unit operation and drops to less than 0.5V, when any of mentioned above red LED goes on. If 1.8 kOhm resistor is connected between this filter and the ground, TTL compatible output is created. 3.8. It is possible to significantly reduce the output power, pulling filter “SH/D” to the ground. However, it is possible to change the output power smoothly by a trimmer resistor (50 kOhm is the recommended value of it), connected between this pin and the ground. 3.9. The output power drops to about 75% of rated level, if the filter “CTRL” is pulled to the ground.

Cover Letter(s)

920 E. State Parkway • Schaumburg, IL 60173 Toll Free Number: (800) USA MADE (800.872.6233) Phone: 847.908.5400 • Fax: 847.908.5408 www.crescendtech.com • E-mail: [email protected] May 4, 2011 Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: CWWP5XXUH1 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: SchematicSchematics P5UH.pdf Block DiagramBlock Diagram P5UH.pdf Parts ListSemicond List P5UH.pdf Operational DescriptionDescription P5UH.pdf Tuning ProcedureTest Procedure P5UH.pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Pursuant to DA 04-1705 June 15, 2004 of the Commission’s public notice, we also request temporary confidential treatment of information accompanying this application as outlined below: External/Internal PhotosFCC Photos P5UH.pdf User manualUsers Manual P5UH.pdf Sincerely, Mark Obermann

External Photos

P5XXUH1 Back View P5XXUH1 Side view # 1 . P5XXUH1 Side view # 2 P5XXUH1 Side view # 3 P5XXUH1 Side view # 4

ID Label/Location Info

Place of Label

ID Label/Location Info

Crescend TechnologiesSN: xxxxxxxxx Model: P5 Series UHF-HPin: xx PN: xxxxxxxxxxxxxPout: xx FCC ID: CWWP5XXUH1Freq:xx IC: 7291A – P5XXUH1Voltage: xx

Internal Photos

P5XXUH1 Inside View P5XXUH1 Module Board P5XXUH1 Filter / Detector Board Ground Plane on Back of Board P5XXUH1 Control Board

RF Exposure Info

6/16/2011 Page 1 of 3 RF Exposure Report General information : Device category: Mobile per Part 2.1091 Environment: Uncontrolled Exposure Fixed devices that operate under Part 90 of this chapter are subject to routine environmental evaluation for RF exposure prior to equipment authorization or use if they operate at frequencies of 1.5 GHz or below and their effective radiated power (ERP) is 1.5 watts or more. However, compliance with the power density limits of 1.1310 is not required. Antenna: This device is typically used in fixed location service only. The although the manufacturer does not specify an antenna. A typical antenna in this type of service has a gain of 3 dBi. Configuration Antenna p/n Type Max. Gain (dBi) Fixed mounted Any omni 3 Operating configuration and exposure conditions: The conducted output power is 50 Watts. In typical use the duty cycle can approach 100%. The manufacturer also markets this device only for occupation use. But in fixed use the exposure is generally uncontrollable. A typical installation consists of an antenna system with a coaxial cable of the type RG 213/U which has a loss of 1dB for a length of 20 feet at these frequencies. 6/16/2011 Page 2 of 3 MPE Calculation: The minimum separation distance is calculated as follows: The limit for uncontrolled exposure environment above 300 MHz is f/1500 mW/cm 2 . Channel frequency: 450 - 512 MHz The conducted power output is 50 watt. The coax loss was taken as 1.5 dB (30 ft). Antenna gain was taken as 3 dBi 6/16/2011 Page 3 of 3 FCC RF Exposure Requirements: The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other transmitter/antenna system. The antenna should be mounted so as to maintain a distance of at least 5 ft (1.5m) between the antenna and bystanders, when operated in a typical installation and a 3 dBi antenna. Failure to observe these restrictions will result in exceeding the FCC RF exposure limits.

Test Report

FCC PT 90 AMPLIFIER AND IC RSS-131, RSS-GEN TEST REPORT APPLICANT CRESCEND TECHNOLOGIES, LLC ADDRESS 140 E. State Parkway SCHAUMBURG IL 60173 USA FCC ID CWWP5XXUH1 IC LABEL 7291A-P5XXUH1 MODEL NUMBER P5 SERIES UHF-H PRODUCT DESCRIPTION UHF 50W AMPLIFIER DATE SAMPLE RECEIVED 3/25/2011 DATE TESTED 3/28/2011 TESTED BY Nam Nguyen APPROVED BY Mario de Aranzeta TIMCO REPORT NO. 598AUT11TestReport.doc TEST RESULTS PASS FAIL THE ATTACHED REPORT SHALL NOT BE REPRODUCED EXCEPT IN FULL WITHOUT THE WRITTEN APPROVAL OF TIMCO ENGINEERING, INC. 849 NW STATE ROAD 45 NEWBERRY, FL 32669 USA PH: 888.472.2424 OR 352.472.5500 FAX: 352.472.2030 EMAIL: [email protected] HTTP://WWW.TIMCOENGR.COM Certificate # 0955-01 Applicant: CRESCEND TECHNOLOGIES, LLC FCC ID: CWWP5XXUH1 IC: 7291A-P5XXUH1 MODEL #: P5 SERIES UHF-H Report: C\CRESCEND_CWW\598AUT11\598AUT11TestReport.doc Page 2 of 18 TABLE OF CONTENTS ATTESTATION STATEMENT ............................................................................ 3 REPORT SUMMARY ........................................................................................ 4 TEST ENVIRONMENT AND TEST SETUP ......................................................... 4 DUT DESCRIPTION ......................................................................................... 5 TEST EQUIPMENT .......................................................................................... 6 TEST PROCEDURES ....................................................................................... 7 TEST RESULTS ............................................................................................... 9 RF POWER OUTPUT ............................................................................................................... 9 OCCUPIED BANDWIDTH ...................................................................................................... 13 SPURIOUS EMISSIONS AT ANTENNA TERMINALS (CONDUCTED)...................................... 15 FIELD STRENGTH OF SPURIOUS EMISSIONS (RADIATED) ................................................ 16 PASSBAND GAIN AND BANDWIDTH (FOR IC ONLY) ..................................... 17 POWER LINE CONDUCTED INTERFERENCE....................................................................... 18 Applicant: CRESCEND TECHNOLOGIES, LLC FCC ID: CWWP5XXUH1 IC: 7291A-P5XXUH1 MODEL #: P5 SERIES UHF-H Report: C\CRESCEND_CWW\598AUT11\598AUT11TestReport.doc Page 3 of 18 ATTESTATION STATEMENT This equipment has been tested in accordance with the standards identified in the referenced test report. To the best of my knowledge and belief, these tests were performed using the measurement procedures described in this report. Test Certificate #0955-01 All instrumentation and accessories used to test products for compliance to the indicated standards are calibrated regularly in accordance with ISO 17025 requirements. I attest that the necessary measurements were made by me or under my supervision, at Timco Engineering, Inc. located at 849 N.W. State Road 45, Newberry, Florida 32669 USA. Authorized by: Mario R. de Aranzeta Signature: Function: Test Lab Supervisor / Engineer Date: March/30/11 Applicant: CRESCEND TECHNOLOGIES, LLC FCC ID: CWWP5XXUH1 IC: 7291A-P5XXUH1 MODEL #: P5 SERIES UHF-H Report: C\CRESCEND_CWW\598AUT11\598AUT11TestReport.doc Page 4 of 18 REPORT SUMMARY Disclaimer The test results relate only to the items tested. Purpose of Test To show the DUT in compliance with FCC CFR 47, Part 90 and IC RSS-131 requirements for amplifiers Test Procedures ANSI/TIA 603-C: 2004 FCC CFR 47 Part 90 IC RSS-131 ANSI C63.4: 2003 Related Approval N/A TEST ENVIRONMENT AND TEST SETUP Test Facility All tests were conducted by Timco Engineering Inc. located at 849 NW State Road 45, Newberry, FL 32669 USA Laboratory Test Condition Temperature: 26ºC Relative humidity: 50% . Deviation from the standards No deviation Modification to the DUT No modification was made. Test Exercise (software etc.) The DUT was placed in continuous transmitting mode of operation. System Setup Stand alone device. Applicant: CRESCEND TECHNOLOGIES, LLC FCC ID: CWWP5XXUH1 IC: 7291A-P5XXUH1 MODEL #: P5 SERIES UHF-H Report: C\CRESCEND_CWW\598AUT11\598AUT11TestReport.doc Page 5 of 18 DUT DESCRIPTION Manufactured by CRESCEND TECHNOLOGIES, LLC Product Description UHF 50W AMPLIFIER FCC ID CWWP5XXUH1 IC Label 7291A-P5XXUH1 Model # P5 SRIES UHF-H Operating Freq 450-454, 456-462.5375, 462.7375-467.5375, 467-7375-512 MHz Max. Output Power 50 Watts Modulation N/A Amplifier Power Source 13.8 VDC DC Power Test Item Preproduction Type of DUT Fixed/Mobile Amplifier Applicant: CRESCEND TECHNOLOGIES, LLC FCC ID: CWWP5XXUH1 IC: 7291A-P5XXUH1 MODEL #: P5 SERIES UHF-H Report: C\CRESCEND_CWW\598AUT11\598AUT11TestReport.doc Page 6 of 18 TEST EQUIPMENT Device Manufacturer Model Serial Number Cal/Char Date Due Date 3-Meter Semi- Anechoic Chamber Panashield N/A N/A Listed 5/10/10 5/10/12 AC Voltmeter HP 400FL 2213A14499 CAL 6/12/11 6/12/13 Antenna: Dipole Kit Electro- Metrics TDA-30/1-4 153 CHAR 8/10/09 8/10/11 Antenna: Passive Loop EMC Test Systems EMCO 6512 9706-1211 CAL. 8/1/09 8/2/11 Frequency Counter HP 5385A 2730A03025 CAL 9/4/09 9/4/11 Hygro- Thermometer Extech 445703 0602 CAL 6/15/11 6/15/13 Modulation Analyzer HP 8901A 3435A06868 CAL 5/26/09 5/26/11 Digital Multimeter Fluke FLUKE-77 35053830 CAL 11/18/09 11/18/11 Analyzer Tan Tower Preamplifier HP 8449B-H02 3008A00372 CAL 11/21/09 11/21/11 Analyzer Tan Tower Quasi- Peak Adapter HP 85650A 3303A01690 CAL 11/22/09 11/22/11 Analyzer Tan Tower RF Preselector HP 85685A 3221A01400 CAL 11/21/09 11/21/11 Analyzer Tan Tower Spectrum Analyzer HP 8566B Opt 462 3138A07786 3144A20661 CAL 11/24/09 11/24/11 Temperature Chamber Tenney Engineering TTRC 11717-7 CHAR 4/25/10 4/25/12 Applicant: CRESCEND TECHNOLOGIES, LLC FCC ID: CWWP5XXUH1 IC: 7291A-P5XXUH1 MODEL #: P5 SERIES UHF-H Report: C\CRESCEND_CWW\598AUT11\598AUT11TestReport.doc Page 7 of 18 TEST PROCEDURES Power Line Conducted Interference The pr…

Text truncated - open the document above for the full version.

Contact Information

Applicant

James Hougo(President)
[email protected]800-872-6233Fax: 8479085408

Technical Specifications

#Rule PartsFrequency RangePower OutputEmissionTolerance
722,9470 MHz - 512 MHz50 WNOTE 1Amp
Confidentiality
Long Term
Grant Notes
Power Output listed is conducted. Maximum Rated Output Power per 90.205(s) is 53 W. The antennas used for this amplifier must be fixed-mounted on outdoor permanent structures. RF exposure compliance is addressed at the time of licensing, as required by the responsible FCC Bureau(s), including antenna co-location requirements of Section 1.1307(b)(3). NOTE 1: F1D, F1E, F3D, F3E, G3E

Other Applications from Crescend Technologies LLC

Power Amplifier AB to C Class - FCC ID CWWP25XXDE4 - Crescend Technologies LLC
CWWP25XXDE4

Power Amplifier AB to C Class

Sep 17, 2025

Equipment Class

B2I - Part 20 Industrial Booster (CMRS)
VHF AMPLIFIER - FCC ID CWWP10XXDE1 - Crescend Technologies LLC
CWWP10XXDE1

VHF AMPLIFIER

Mar 10, 2020

Equipment Class

B9B - Part 90 Class B Industrial Booster (non-SMR)
HIGH BAND HIGH POWER AMPLIFIER - FCC ID CWWP25XXHA3 - Crescend Technologies LLC
CWWP25XXHA3

HIGH BAND HIGH POWER AMPLIFIER

Jan 27, 2020

Equipment Class

B9A - Part 90 Class A Industrial Booster (non-SMR)
LOW BAND HIGH POWER AMPLIFIER - FCC ID CWWP25XXGA3 - Crescend Technologies LLC
CWWP25XXGA3

LOW BAND HIGH POWER AMPLIFIER

Jan 21, 2020

Equipment Class

B9A - Part 90 Class A Industrial Booster (non-SMR)
25Watt One-Way Amplifier - FCC ID CWWP2RTK450 - Crescend Technologies LLC
CWWP2RTK450

25Watt One-Way Amplifier

May 10, 2015

Equipment Class

AMP - Amplifier