Test Data

FCC ID: H25TAC2001

Test Report

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FCCID_146365

H25TAC2001 Test Data for H25TAC2001 MODEL TAC/COM 2001 REPEATER 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 $495 and a request for confidentiality fee of $145 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 H25TAC2001 (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: 1.7 Watts at 800 mA; 12 VDC (Battery) (7) Maximum Power Rating of 2.0 Watts (8) A linear regulator with an output voltage of 5.0 VDC powers all stages except the final amplifier, which is powered with conditioned battery voltage. (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

H25TAC2001 (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) Repeater power output measurements were made at the RF output connector at the TX output frequency (165.9375 MHz). This test was done with an unmodulated input carrier on the RX frequency (171.600 MHz) in accordance with §90.205(d) using the setup of Figure 1. 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 was 1.7W at 12.0 VDC. Note that the TAC/COM 2001 repeater has input and output tuning bandwidths of 200 kHz respectively; power drops off quickly, either side of the desired band center due to the duplexer filter’s passband. Thus the sample complies with §90.205(d).

H25TAC2001 Power -vs- Voltage 2.5 2 1.5 Power (W 1 0.5 0 9.5 10.5 11.5 12.5 13.5 Voltage (VDC) 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 using the setup of FIGURE 1. A reference level signal of 500 Hz deviation (1/3 nominal deviation) at the frequency of maximum response (1000 Hz) was used. At each test frequency, the input deviation level was adjusted to maintain the reference output deviation. Note that the repeater is designed with a flat audio response in the audio passband. In this range, the repeater does not color the repeated transmitters original pre-emphasis curve. The Boonton 82AD modulation meter was used to measure FM deviation levels at both input and output frequencies.

H25TAC2001 TAC/COM 2001 Frequency Response Deviation = 1/3 nominal (500 Hz) Frequency Deviation Measurement Relative (Hz) (Hz) (dB) Response (dB) 100 120 41.584 -12.395 200 280 48.943 -5.036 300 440 52.869 -1.110 500 500 53.979 0.000 700 500 53.979 0.000 900 500 53.979 0.000 1000 500 53.979 0.000 1200 500 53.979 0.000 1400 500 53.979 0.000 1600 500 53.979 0.000 1800 500 53.979 0.000 2000 510 54.151 0.172 2200 500 53.979 0.000 2400 490 53.804 -0.175 2600 480 53.625 -0.354 2800 460 53.255 -0.724 3000 430 52.669 -1.310 3200 380 51.596 -2.383 3400 340 50.630 -3.349 3600 290 49.248 -4.731 3800 240 47.604 -6.375 4000 200 46.021 -7.958 4200 160 44.082 -9.897 4400 140 42.923 -11.056 4600 130 42.279 -11.700 4800 120 41.584 -12.395

H25TAC2001 5000 110 40.828 -13.151 5200 100 40.000 -13.979 Frequency Response 2.0 0.0 -2.0 -4.0 Response (dB) -6.0 -8.0 -10.0 -12.0 -14.0 -16.0 100 1000 10000 Frequency (Hz)

H25TAC2001 Modulation Limiting Curves showing frequency deviation output on 165.9375 MHz versus frequency deviation input on 171.600 MHz are shown below, tested at the frequency of maximum deviation (1 kHz). The repeater’s output connector was connected to the input of the spectrum analyzer via a 30 dB 10Watt attenuator and the HP 778D directional coupler thru-path as shown in FIGURE 1. The input test signal at 171.600 MHz was introduced via the incident coupling arm of the directional coupler, producing an input RF level which is 70 dB below the repeaters output level. The information submitted shows the modulation limiting capability well beyond the range of properly modulated input signals. A Marconi 2041 RF Signal Generator was used to generate the NBFM modulated input signal and a Boonton 82AD modulation meter was used to measure FM deviation levels at both input and output frequencies. TAC/COM 2001 FCC Testing Input Deviation -vs- Output Deviation Test Tone frequency = 1.0 kHz Input Output deviation level (Hz) deviation level (Hz) 300 360 500 540 700 730 900 920 1000 1010 1200 1200 1400 1390 1600 1580 1800 1770 2000 1950 2200 2150 2400 2330 2600 2510 2800 2630 3000 2710 3200 2780 3400 2810 3600 2830 3800 2860 4000 2870 4200 2900 4400 2910 4600 2920 4800 2920

Input dev. -vs- Output dev. 3500 H25TAC2001 3000 2500 Output Deviation (Hz) 2000 1500 1000 500 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Input Deviation (Hz)

H25TAC2001 OCCUPIED BANDWIDTH 2.1049, 90.211(a) The next series of plots are taken from a Marconi 2383 spectrum analyzer at 169.9375 MHz, the repeater’s output frequency. The repeater output connector was connected to the input of the spectrum analyzer via a 30 dB 10Watt attenuator and the HP 778D directional coupler thru-path as shown in FIGURE 1. The input test signal at 171.600 MHz is introduced via the incident coupling arm of the directional coupler, producing an input RF level which is 70 dB below the repeaters output level. The Marconi generator was modulated by its internal audio generator with a sine wave at 1 kHz and 2.5 kHz at a level 16 dB above that required to produce 50% modulation (4.73 kHz based on a nominal 1.5 kHz deviation). These represent overmodulated transmitter signals, which are to be repeated. Audio levels were verified with a Boonton 82AD Modulation Meter. 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. 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 165.9375 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).

H25TAC2001 Modulated at 2.5 kHz Modulated at 1 kHz

H25TAC2001 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 repeater test box was used to directly key the repeater. The leader LAG-12S audio generator was used to provide the repeater with a 1 kHz modulation signal at a level 16 dB above that required to produce 50% modulation (4.73 kHz based on a nominal 1.5 kHz deviation). The repeater output connector was connected to a total of 40 dB of attenuation comprised of 30 dB 10Watt attenuator and a 10 dB Mini-Circuits CAT-10 attenuator connected to the input of the spectrum analyzer, via a 18-inch test cable made of RG-58 coax. The additional attenuation was required, in order to maximze the spectrum analyzers dynamic range. 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 2 W, this yields a minimum required attenuation of 53 dBc. All spurious emissions are attenuated below this level. Thus the sample complies with 2.1053 and 90.209 Emission Mask D. This plot shows the 165.9375 MHz carrier in a span of 10 MHz – 220 MHz

H25TAC2001 This plot shows a scan from 0 to 2 GHz.

H25TAC2001 FIELD STRENGTH OF SPURIOUS RADIATION 2.1053 and 90.209 (Performed by Retlif Testing Laboratories) Test Conditions: Exciter Keying Direct Via Test Interface cable Standard temperature and Humidity Battery Power: 12 VDC via Battery Radiation into shielded load. 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 0.25W 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 0.25)/3 = 2.02 V/m = 126.10 dBuV/m Attenuation Requirement: §2.1053 requires that the spurious radiated emissions be attenuated at least 50 + 10 log (2W) = 53 dB below the unmodulated carrier field strength. Limit @ 3m = 126.10 – 53 dB = 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 = 123.97 – 53 dB = dBuV/m Retlif Laboratories calculated the actual limit to be: 77.37 dBuV/m

H25TAC2001 Test Result Complies. The strongest spurious emission is at the seventh harmonic of the 158.030 MHz test frequency with a level of 58.86 dBuV/m @ 3m. This is more than 18 dB below the limit.

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TEST SETUP PHOTOGRAPH RADIATED EMISSIONS RETLIE R—3749N Radiated Emissions ro Retlif Testing Laboratories I DATA PACKAGE No. R—3749N

DRAWING NO. RCISPR1—RE GENERAL TeST SETUP, TEST METHOD EMISSIONS Anteiamr RF TRaNseaRENT ENcLOSURE Tesr avrennia Tesr ownte # an crowp nuwme secomrun Anivzen vexsursvent eeument roou aue mee ro Retlif Testing Laboratories I DATA PACKAGE No. R—37495N

EQUIPMENT LIST Radiated Emissions EN Type Manufacturer Description Model No. Cal Date Due Date az02 Biconilog EMCO 26 Mitc—2 OB sle anomo anom ns BMTTest Receiver Rohde & Schware 20 He— 26. Citz Ese zon spm Retlif Testing Laboratories DATA PACKAGE No. R—3749N

RETLIF TESTING LABORATORIES TABULAR DATA SHEET [rost Metho: [Spurious Raciated Emssions 30 MHz to 1.7 GHz |customer: [DTC GCommunications, nc JJob No: [r—srzon ] frost Sampl Tactcal Repeater Model No: [Fac.con20012 Jsorial No: [AG13 ] fTest Specifiation: FCC Pan 2 & 90 Paragraph: 2.1053 & 90210 |operating Mode: [Contnuously Transmiting [rechnician: Date: 2zs01 ] Notes: Detector Function: Paak Test Distance= am Harmonic Limit por Emission Mask D oparagraph 90 210 Tos Hamone AntPoston‘ Ne Corecion Corecied it Frequency Frequency EuT is Readno Facor Reatig ats ht ie wie sow «e ctuvim coarm Tesor — serss — — — — si40 soree — . — — I — sesoo — — — — I szosr — — — — U — sesse — — — — U terai — — — — U — merre — — — — I — 19370 — — — — 1 — Tesore — — — — saxo No EUT emissions were observed twoughout he given hrequency spactrum [Data Sheet 1 of 1 R—3749N

H25TAC2001 Part 15 Spurious Receiver (Unintentional Radiator) For reference only: All receiver spurs are below the FCC Part 15 , Subpart B, Class B limits.

H25TAC2001 FREQUENCY STABILITY 2.1055, 90.213, 90.214 Frequency stability measurements were made over the temperature range of –30° C to +60° C by directly keying the exciter with a test interface cable. Variations of the primary DC voltage were varied by 20 % lower and 10% higher than the rated voltage range (9.6-13.2 VDC) using the KIKSUI power supply. 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. 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 TAC/COM 2001’s transmitter is well within the 5 ppm limit.

H25TAC2001 The table below shows frequency variations vs. power supply input voltage data. TAC/COM 2001 Frequency Stability over voltage Test Frequency (MHz) = 165.9375 Voltage Frequency Error (ppm) (VDC) (delta Hz) 9.6 -10 -0.06026 9.8 -10 -0.06026 10 -11 -0.06629 10.2 -12 -0.07232 10.4 -15 -0.0904 10.6 -15 -0.0904 10.8 -16 -0.09642 11 -17 -0.10245 11.2 -16 -0.09642 11.4 -15 -0.0904 11.6 -16 -0.09642 11.8 -17 -0.10245 12 -17 -0.10245 12.2 -18 -0.10847 12.4 -19 -0.1145 12.6 -20 -0.12053 12.8 -20 -0.12053 13 -20 -0.12053 13.2 -21 -0.12655 Frequency -vs- voltage 5 4 3 2 1 Error (ppm) 0 -1 -2 -3 -4 -5 9.5 10.5 11.5 12.5 13.5 Voltage (VDC)

H25TAC2001 The plot below shows the frequency vs. temperature data. TAC/COM 2001 Frequency -vs- Temperature Test Frequency (MHz) = 165.9375 Temperature Frequency Error (ppm) (degree C) delta (Hz) -30 150 0.903955 -20 130 0.783427 -10 70 0.421846 0 50 0.301318 10 60 0.361582 20 30 0.180791 30 -10 -0.06026 40 -140 -0.84369 50 -220 -1.3258 60 -60 -0.36158 Frequency -vs- Temperature 5 4 3 2 Frequency Error (ppm) 1 0 -1 -2 -3 -4 -5 -40 -30 -20 -10 0 10 20 30 40 50 60 70 Tem perature (Deg. C)

H25TAC2001 DTC TEST INSTRUMENTS Type Manufacturer Model No. Radio Test Set Marconi Instruments 2955 RF Signal Generator Marconi Instuments 2041 Spectrum Analyzer Marconi Instruments 2383 Deviation Meter Boonton 82AD Multimeter Hewlett Packard 34401A DC Power Supply O.K Industries PS732 DC Power Supply KIKSUI PAB 18-3-A Audio Generator Leader LAG-12S Directional Coupler Hewlett Packard 778D Frequency Counter Systron Donner 6420 RMS Voltmeter Hewlett Packard 3400A 30 dB 10W Attenuator Wienchell 33-30-34 10 dB ½ W Attenuator MiniCircuits CAT-10 Temperature Chamber Associated Systems BK-1101 Repeater Test Interface Box DTC –1 (Allows Repeater Exciter to be directly keyed and modulated without an input signal)

H25TAC2001 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 repeater was powered up and down manually with the test interface cable 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 SETUP PHOTOGRAPH TRANSIENTFREQUENCY BEHAVIOR r. Retlif Testing Laboratories . DATA PACKAGE No. R—3749N

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EQUIPMENT LIST Transient Frequency Behavior EN Type Manufacturer Description Model No. Cl Date Due Date 073. Inerfhencs Analy Electo—Metrics toxtte~ 1 oite Emcas souee sovor 3117.. PowerSopply B&K Precision 030 ¥de, 30 A 1620 2n3m0 ansion 3233 Grephcs Ploter Heslet Pockard Na za7a anuoo anuot 401. Oscilorcope Tektronis wa Tos s2oa srnamo sna: 4004 REMillvolimeter Boonton Electronics.. 10KHe— 12 Gfte sz 10500 1omer 4910 Tee Adapter Beuel and Kjaee 10k8e< 1 Gite oriea tosto 1oisor 4987 10X Probe ‘Tckironix 5oo Mz Petsa imam inge 4961 Atemnator Narda pe— 1s oife mosus 1ommo rorm 520 Digiul Miltmer Waverk NA 2587 vaad Team 5308 AM/EM Signal Generator MarconInste. 1okie~ 12 itz zom wsio Lo e Retlif Testing Laboratories I DATA PACKAGE No. R—3749N


Document Created: 2001-04-25 11:59:18
Document Modified: 2001-04-25 11:59:18
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