T2001S TEST DATA

FCC ID: H25T2001S

Test Report

Download: PDF
FCCID_107125

H25T2001S Test Data for H25T2001S I. INFORMATION REQUIRED UNDER PART 2 Para. 2.10033(a) This Application for Certification is filed on form 731 with all questions answered. Confidentiality is being requested for the schematic. An application fee of $475 and a request for confidentiality fee of $135 has been sent. 2.10033(b) N/A 2.10033(c)(1) The full name and address of the applicant and manufacturer for certification is: DTC Communications Inc. 75 Northeastern Blvd. Nashua, NH 03062 (2) The FCC Identifier of the device is H25T2001S (3) A copy of the operating instructions is included in the EXHIBITS. (4) Emission: NBFM Voice – Designator: 11K2F3E Emissions calculation is included in the EXHIBITS. (5) Frequency Range: 150 –174 MHz (6) Power: Two power levels: 500 mW at 130 mA; 6 VDC and 1.0 W at 240 mA; 9 VDC (7) Maximum Power Rating of 1.25 Watts (8) All stages are powered by 3.5 VDC regulated supplies with the exception of the final amplifier device, which is connected to the battery source. (9) A tune-up procedure is included in the EXHIBITS. (10) A schematic diagram is included in the EXHIBITS. (11) A drawing and photo of the equipment identification label is included in the EXHIBITS. (12) Photographs showing the external and internal construction of the equipment is included in the EXHIBITS. (13) N/A (14) Test Data as required by (46)§§(47) 2.1046 through 2.1057, inclusive, is measured in accordance with the procedure setout in (48)§ 2.1041. (15) N/A (16) N/A

H25T2001S (17) N/A II. TEST DATA Data required by (46)§§(47) 2.1046 through 2.1057, inclusive, is measured in accordance with the procedures setout in (48)§ 2.1041. RF POWER OUTPUT 2.1046(a), 2.1033(c)(8) Power output measurements were made at the RF output connector. This test was done with an unmodulated carrier in accordance with §90.205(d). The power output was measured with a Marconi Radio Communications Test Set, Model 2955. The electrical characteristics of the RF load was 50 + j0 Ohms (50 ohms pure resistive). The RF power measured mid-band was 590 mW at 6.0 VDC and 1.22 Watts at 9.0 VDC. Thus the sample complies with §90.205(d).

H25T2001S MODULATION CHARACTERISTICS 2.1047(a), 90.211(a) Spectrum analyzer data is included which shows that the equipment will meet the modulation requirements under §90.211(a). This transmitter is equipped with an audio low pass filter circuit. Frequency Response Measurement data showing the frequency response of the transmitter is tabulated and graphed below. A reference level of 1.25 kHz deviation (as measured with the Marconi Communications Test Set, model 2955) at the frequency of maximum response (2500 Hz) was used. At each test frequency, the input audio level was adjusted to maintain the reference deviation.

H25T2001S Modulation Limiting Curves showing frequency deviation versus the microphone input levels are shown below, tested at the frequency of maximum deviation (2.5 kHz). The information submitted shows the modulation limiting capability throughout the range of input signals employed. A Leader model LAG-125 Audio Generator was used to generate the modulation, and a Marconi Communications Test Set, model 2955 was used to measure modulation. Audio levels were verified with a HP34401 meter. OCCUPIED BANDWIDTH 2.1049, 90.211(a) The next series of plots are taken from a Marconi 2383 spectrum analyzer. The transmitter was modulated by a Leader model LAG-125 audio generator with a sine wave at 2500 Hz at a level 16 dB above that required to produce 50% modulation (1.25 kHz deviation). Audio levels were verified with a HP34401A multimeter. The transmitter output connector was connected to the input of the spectrum analyzer via a 9 inch test pigtail made of RG-188 coaxial cable, terminated with a BNC connector and a JFW model 50FH-020-10, 50-ohm, 20 dB attenuator. Power was supplied to the test sample via a HP E3610A Power Supply and test leads. Paragraph 90.210(d) states that for transmitters that are designed to operate with a 12.5 kHz channel bandwidth, any emission must be attenuated below the power (P) of the highest emission contained within the authorized bandwidth as follows: 1) 0n any frequency removed from the center of the authorized bandwidth f0 to 5.625 kHz removed from f0: Zero dB.

H25T2001S 2) 0n any frequency removed from the center of the authorized bandwidth by a displacement frequency (fd in kHz) of more than 5.625 kHz but no more than 12.5 kHz: At least 7.25 (fd – 2.88 kHz) dB. 3) 0n any frequency removed from the center of the authorized bandwidth by a displacement frequency (fd in kHz) of more than 12.5 kHz: At least 50+ log(P) or 70 dB, whichever is the lesser attenuation. The authorized bandwidth is 12.5 kHz; the frequency of the sample was set for 161.025 MHz. The first plot shows the unmodulated carrier. The second plot shows the modulated carrier. The mask is superimposed on both spectral plots. All emissions are below the required limits. Thus, the sample complies with 90.211(a).

H25T2001S SPURIOUS EMISSIONS AT ANTENNA TERMINALS 2.1053, 90.209 As required by §§2.1053 and 90.209, Emission Mask D, spurious emissions measurements at the antenna terminals were made using a Marconi 2383 spectrum analyzer. The transmitter was modulated by a Leader model LAG-125 audio generator with a sine wave at 2500 Hz at a level 16 dB above that required to produce 50% modulation (1.25 kHz deviation). Audio levels were verified with a HP 34401A multimeter. The transmitter output connector was connected to a JFW model 50FH-020-10, 50-ohm, 20dB attenuator at the input of the spectrum analyzer, via a 9-inch test cable made of RG-188 coax. The spectrum was investigated over the range 9 kHz – 1.75 GHz per §2.1057(a)(1). All emissions more than 250%, removed from the center of the authorized bandwidth must be attenuated by at least 50 + 10 log (P) dB below the intentional carrier. Since the maximum measured unmodulated carrier power was 1220 mW, this yields a minimum required attenuation of 50.86 dBc. All spurious emissions are attenuated below this level. The two significant spurs are the second harmonic at –53 dBc and the third at –59 dBc. Thus the sample complies with 2.1053 and 90.209 Emission Mask D. This plot shows the 160 MHz carrier in a span of 10 MHz – 220 MHz

H25T2001S This plot shows a scan from 0 to 2 GHz. Note the second and third harmonics

H25T2001S FIELD STRENGTH OF SPURIOUS RADIATION 2.1053 and 90.209 (Performed by Retlif Testing Laboratories) Test Conditions: Standard temperature and Humidity External Power: 9 VDC via test leads and HP E3610 Power Supply 9 Inch Pigtail made of RG-188 coax with BNC connector and 50 Ohm termination, soldered to the antenna terminals of the test sample. Test Equipment See Retlif Test Instruments List Minimum Standard §2.1053 The power of any emission shall be attenuated below the carrier power (P) by at least (50 + 10log P) dB or 70 dB, whichever is the lesser attenuation. Theoretical Calculation of Radiated Power Limit below 1000 MHz The emissions limit is expressed in terms of equivalent power that would have to be fed into a dipole antenna in order to produce the same electric field strength. Based on the maximum rated output power of 1.25W and the formula E = SQRT (30GPt)/R Where: E = Electric Field Intensity in V/m G = Antenna Gain = 1.64 Pt = Power in Watts R = Distance from test sample to antenna in Meters = 3 E = SQRT (49.2 X 1.25)/3 = 4.51 V/m = 133.11 dBuV/m Attenuation Requirement: §2.1053 requires that the spurious radiated emissions be attenuated at least 50 + 10 log (1.25W) = 50.86 dB below the unmodulated carrier field strength. Limit @ 3m = 133.11 – 50.86 dB = 82.2 dBuV/m Theoretical Calculation of radiated Power Limit above 1000 MHz For all emissions above 1000 MHz, the source of the emission is assumed to be isotropic. Therefore the antenna gain G = 1 and the limit is reduced slightly to: Limit @ 3m = 130.9 – 50.86 dB = 80.1 dBuV/m Retlif Laboratories measured the actual peak power and calculated the actual limit to be: –20 dBm + 107 dB = 87dBuV/m The difference between theoretical and actual limits is due to the T-2001’s antenna efficiency. Test Result Complies. The strongest spurious emission is at the second harmonic of the third test frequency with a level of 66.1 dBuV/m @ 3m. This is more than 20 dB below the limit.

copmmmomss @) Retlif Testing Laboratories ~*<=:*— 101 New Boston Head, Goffstown, NH 0301E ,fi%fi}:‘“}:fi%& I 603—407—4000 — Fax 608—407.5201 womtematence Jure 26, 2000 DTC Communications, Inc. 15 Nottheastem Biud. Nasina, NH 03062 Attention: Mr.Mike Murpty Dear Sin Enclosed you will indDataPackage R—3644N covering the testing ofthe Audio Transmniter, Mode! No. T2001, Serial No. FCCD to therequirements ofFCC Parts 2 & 90. This testing was performed egainst Purchase Order Number 47588. Test sctup photographs and drawings, equipmont lists, and test date are included for each test method performed on the above test semple. ‘Thank you for this opportunity to be ofservice to you. Should you have any questions conceming this data or the actual testing of your unit, please do not hesitate to contact us. Sincerely, RETLIF TeSTING LaBorAtoriss ArprresAIgljetng Amanda M. Lackey Publications Enc. (asstated) wardests Copennindiart wonmmosiinar ao enos«e aeee en uns «1800iensste aneas ies Atten Sats Copoutce «a Motnmisitcon

covonntomee " Retlif Testing Laboratories \2.‘~ semonazomton 101 New Boston Road, Gofstown, NH 03015 ieetts. 603—4907—4000 — Fax: 600—107—5001 wels "HreRt sefiRitihe DATA PACKAGE FOR Audio Transmitter Model No. T200 Serial No. FCCOL SHOWING COMPLIANCE WITH RADIATED EMISSIONS Customer Name: DTC Communications, Inc Customer P.0.: arses Data Package No: R364N Package Date: June 26, 2000 Test Start Date: June 15, 2000 Test Finish Date: June 16, 2000 Test Technician(s): Tim Fitcowsli Test Engineer: John Monghan Dets Prepared By: Amanda Lackey Supervisor: Soott Wentworth wtrene tetentutewcttermnnimeveiesuthtornatmnucce aoermeeirctmcnonaroces Meianareeignirenrmoteelatorereesmmceeereieeeenedeenc ts mminremenilovamonaromaiiitehoeoiiemmonlmrcenpimne mmtnnioeencmioiedrnne Connimer foinoeniacmooiee Henonnti Corentainiant woomeihiar won enos oices en —rume —As00«Amstenssr o» maus «es uemees «i Aferion Sut Grpoaten Anvtnncattemn

to TEST SETUP PHOTOGRAPH e Retlif Testing Laboratories r. DATA PACKAGE No. R—3644N

EQUIPMENT LIST Spurious Rediated Emissions rN Type Manafecturer Doscription. Madel No. CilDate: DueDate ms Spectum Ariber Adrates m rsone Ramin mone mome sue rroamolter Siey oxone mane arsass vano se aur PovecSurny BeicPreciin coovenaoa 1e zavo amm se bostic itOue sco nurore sus weee anm an Risaiba suco asvit—zone w sneeo enses on Contis ow RevetPrina Nn mon «sn ansm wse mc asipe: Beamsateris se rone messe aam mm e Reflif Testing Laboratories I DATA PACKAGE No. R—3644N

m RETLIF TESTING LABORATORIES = 7 Aeotaron se Foo ran2 4 so ramachart erosmscacte [contnuousty rensmiting oetesr unclon: Posk TestDisance= 2m Harmont ivitper EmissionMost 0 ot pregreph 90.210 Tesr imemowe autean womess merer conrecmon conreoren ut rneaueso reeovcior rosmon rosmon rexone racron seone esnerns wise jie men—necim occrcss cou 3 coorm ctaim 15006 — ¥—im so 52.0 143 10e3 — — 20043 Vctm so sa.0 13 sos 870 — aso Vctm so s2.0 ss 5s 1 — sooa vctm so 22.0 oo ses 1 — 7so4s v—tm so 130 34 as4 1 — soo.ns vctm so 180 360 sas i — 105022 ¥—4m o 572 o7 455 1 — 1200.20 Y—im o a1.6 437 270 1 — 1ss0.m4 Vctm o «3.0 ard sie : — 1snore Y¥—im o 478 and se7 sz0 oxtssset [1] or R—3644N

H25T2001S

====== RETLIF TESTNG LABORATORJES amm’"mg SHE enversem anssacore | Iteoter Functon: Peak TestDistance= Om | Harmoni init per Emision Mask D of pregrapn 90.210 Tear wemioe amoin wames weren comeonen conseoreo uit rreauenoy rrsousior rosmon rosmon seome racron reronia @suetens se im wen—mamm pconess cuy «& cuaim c 1105 — V—im so ss0 147 107z — — s00.19 im so 450 28 So8 aro — 18300 Vcim so s0 208 ses i — sea.te ¥oim so 200 21 s21 1 — sosa1 Y—im so 130 315 475 1 — seo.05 V—im so 130 s2 512 i — 11277 ¥im o ar4 37 sar 1 — 12882 — — — — — 1 — Taost im a 450 and as0 i — 11025 — — — — — szo para sneer R—3644N

=====___ RETLIF TESTING LABORATORIES Radiated Enissions t communteatons in. Trensniter co ranza so marocrarit anssacozr [owst {petector runcton: Pokc Testbistance= am. Homconts un Emission Mesk D of more Tear mamowe antein vomexs weren conrecmon commectco w rreousner rreauevr rosmon roamot serone racron nesoms eonerrs w m won—veiort oecnecs can «a smm Em oammsneer [3] or [3] R—3644N

H25T2001S FREQUENCY STABILITY 2.1055, 90.213, 90.214 Frequency stability measurements were made over the temperature range of –30° C to +60° C. Variations of the primary DC voltage were varied by more than 40 % lower and 10% higher than the rated voltage range (6-9 VDC). Frequency measurements were made using a direct (20 dB attenuated) connection to a Systron Donner model 6420 frequency counter with a frequency accuracy of better than 0.1 ppm. Power variations were accomplished with a variable regulated DC supply, an O.K. Industries PS732. Environmental conditions were accomplished with an environmental chamber the Associated Systems BK-1101.The temperature was first lowered to -30° C and then increased in 10° C increments. At each temperature, short- term transient effects were monitored and no adverse effects were noted. The frequency was recorded fifteen seconds after the turn on of the transmitter. The table below shows the frequency vs. temperature data. Temperature ( Degrees C) Frequency (Hz) -30 161025045 -20 161024939 -10 161024936 0 161024955 +10 161024970 +20 161024974 +30 161025001 +40 161024943 +50 161024916 +60 161024893

H25T2001S The table below shows frequency variations vs. power supply input voltage data. Power Supply Voltage Frequency (Hz) 3.5 161024964 4.0 161024970 4.5 161024970 5.0 161024968 5.5 161024966 6.0 161024965 6.5 161024965 7.0 161024962 7.5 161024962 8.0 161024961 8.5 161024958 9.0 161024958 9.5 161024956 10.0 161024975

H25T2001S DTC TEST INSTRUMENTS Type Manufacturer Model No. Radio Test Set Marconi Instruments 2955 Spectrum Analyzer Marconi Instruments 2383 Multimeter Hewlett Packard 34401A DC Power Supply O.K Industries PS732 Dc Power Supply Hewlett Packard E3610A Audio Generator Leader LAG-12S Temperature Chamber Associated Systems BK-1101 Frequency Counter Systron Donner 6420 Attenuator Pad 20 dB JFW 50FH-020

H25T2001S TRANSIENT FREQUENCY BEHAVIOR 90.214 (Performed by Retlif Testing Laboratories) The transient frequency behavior test was carried out in accordance with TIA/EIA 603 §2.2.19 method of measurement §3.2.19 standard. This test measures the amount of time required for the unmodulated higher amplitude test sample to “capture” or “release” a weaker 25 kHz FM modulated test signal during key-up and key-down. This is an indirect method of measuring the time that it takes for a transmitter to come on-channel and allows transition effects to be recorded. The device was powered up and down manually with a test lead and the power supply positive terminal. A fast responding diode detector acts as a trigger signal for the oscilloscope. As shown in the oscilloscope plots, three time periods are observed. The t1, t2, t3 mask limits are superimposed on the data runs. These plots indicate the ton and toff points and the related frequency displacement. The frequency difference remained within the limits of 90.213 between t2 and t3. The test sample comes on-frequency smoothly and remains within the limits of the mask. BLOCK DIAGRAM Transient Frequency Behavior 90.214 50 Ohm Termination Unit Directional Modulated Under Combiner Signal Coupler Test Generator Test RF Detector Oscilloscope Receiver Trigger

TEST SETUPPHOTOGRAPH TRANSIENT FREQUENCY BERAVIOR Retlif Testing Laboratories DATA PACKAGE No. R—3644N

EQUIPMENT LIST Transient Frequency Behavior EN Type Manufacturer Description, Model No. Cal Date Due Date ors InterBronce Analyzer ElectroMetics 10kite— 1 Gite rmcas smum seuor su7 Power Supply B&K Preciion 0—30Ves, 30 A 1ss0 aname arvor sns Graphics Poter Heweit Pckaed NA zeron «1100 anvor 3250 Signal Generor Heweft acaed 500 Ki— 1 Gife $6400—.007.32 81799 s13i0 «00. Oscillscope Tektronix NA Tos s20A anamo anam «004 RE Milivolimeter Boonton Electronics 10KHz— 12 0B se 1589 tosmo «s1 ‘Tee Adopter Bruel and Kjeer 10kits— 1 OHz stisa 102399 tarso asas Attcoustor TEW in DC —2 Gite sort.a0s—20n anuoe anvor ase2 Attonustor Nurda DC 18 Gitz i1020 sans shio Retlif Testing Laboratories DATA PACKAGE No. R—3644N

RETLIF TESTING LABORATORIES l Tek Stop: Single Seq 5.00k5/s 16 Jun 2000 14:03:18 TestMethod (FransiontFreauency Betavior ] Custorer [prC commnisatons.ine | jose Cem ] Test Sanple [nuc Tenoniter ] Motel No : :{reoon ‘[reon: ] Testspaateaion. [Foo part o Rerearaot coare | opestng hok: [biaung remotioca ] Tectaidin 3. Tt rmowsee Kotes ~ stee [1] ot [3

RETLIF TESTING LABORATORIES on Tek Stop: Single Seq 5.00k§/s t—4——— u F E F pE 1+ indfi qBC 200mVV M10.0ms CAZ 2 14.8mV 18 jun 2000 14:12:04 Testnerod [ranstent Frequency Toterince I Customic [re Communicalons ns * [nasion | Tést Sarigle [nodl Trensmiter ] Mosel K.. ... (rzcot frooms ] es Spealieiion [roo Part o Pegremh sorte l Opertig Made (swiching tom of o on | Technicin T. Aifown Jms {eeco ] Kotes: [ ] Sheat

H25T2001S END OF REPORT


Document Created: 2000-06-28 17:48:52
Document Modified: 2000-06-28 17:48:52
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC