Internally gereated test data

FCC ID: H25T2350

Test Report

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FCCID_525994

TEST DATA

RF Power – 2.1046(a), 2.1033(c)(8) 2

Deviation Frequency Response – 2.1047(a) 4

Modulation Sensitivity – 2.1047(b) 7

Occupied Bandwidth – 2.1049(c)(1), 90.210(b)(d) 10

Spurious Emmisions At Antenna Terminals - 2.1049(c)(1), 2.1051, 90.210(b)(d) 16

Frequency Stability: Temperature Stability – 2.1055(a)(1)(c), 90.213 19

Frequency Stability: Power Supply – 2.1055(d)(2) 21

-1-

T-2350 (Digital Body Wire) RF Power Output:

Relevant FCC Chapter:
“§ 2.1046 Measurements required: RF power output.
(a) For transmitters other than single sideband, independent sideband and controlled carrier
radiotelephone, power output shall be measured at the RF output terminals when the transmitter is
adjusted in accordance with the tune-up procedure to give the values of current and voltage on the
circuit elements specified in § 2.1033(c)(8). The electrical characteristics of the radio frequency load
attached to the output terminals when this test is made shall be stated.

§ 2.1033 Application for certification.
(c) Applications for equipment other than that operating under parts 15 and 18 of the rules shall be
accompanied by a technical report containing the following information:
(8) The dc voltages applied to and dc currents into the several elements of the final radio frequency
amplifying device for normal operation over the power range.”

Test Setup:
The setup for this test is shown below.

PM
PS DMM UUT Pad PH

PS – Power Supply – Kikisui PAB18-38
DMM – Digital Multi-Meter – HP 3478A – 2619A31605
UUT – T-2350 Digital Body Wire
Pad – 10 dB Pad – Mini Circuits CAT10
PH – Power Head – HP 8481A – SN 2702A53289
PM – Power Meter - HP 437B - SN 2342A06759

Test Method:
The unit under test was set to a frequency 162.5 MHz, then calibrated to 1 watt at a supply voltage of 9.0 VDC.
For the data collection, the RF output of the UUT was measured at three frequencies across the operating
band. The power was measured with the 10 dB pad (50 ohms, pure resistive) connected directly to the RF
output of the UUT.

Test Results:
The results of the test are shown in Figures 1 and 2.

-2-

RF power output and current consumption as a function of frequency and supply voltage

9.0 VDC
Frequency (MHz)
Pout (mW) I (mA)
150 800 210
162.5 1000 235
174 920 242

Figure 1 - Power Output (Pursuant to FCC Requirement 2.1046a) – Raw Data

1100

1000

900
RF power output (mW)

800

700

600

500
145 150 155 160 165 170 175 180
Frequency (MHz)

Figure 2 - RF Power Output As A Function of Frequency
(Pursuant to FCC Requirement 2.1046a)

-3-

T-2350 (Digital Body Wire) Modulation Characteristics - Deviation Frequency Response

Relevant FCC Chapter:
“§ 2.1047 Measurements required: Modulation characteristics.
(a) Voice modulated communication equipment. A curve or equivalent data showing the frequency
response of the audio modulating circuit over a range of 100 to 5000 Hz shall be submitted. For
equipment required to have an audio low-pass filter, a curve showing the frequency response of the
filter, or of all circuitry installed between the modulation limiter and the modulated stage shall be
submitted.”

Test Setup:
The setup for this test is shown below.

AG Pad ACVM

MA
PS
UUT

AG – Audio Generator – Leader LAG120B – SN 7090853
PS – Power Supply – Kikisui PAB18-38
Pad – 10 dB Pad – Mini Circuits CAT10
ACVM – AC Volt Meter – Leader LMV181A – 3100941
UUT – T-2350 Digital Body Wire
MA – Modulation Analyzer – IFR 2975 – SN 598001503

Test Method:
The unit under test was calibrated to 100% modulation with a 1 kHz tone resulting in FM deviation of 2.5 kHz at
the Narrow Band setting and 5 kHz at the Wide Band setting. For the purposes of the test, the audio input of the
unit was driven with a level adequate to modulate the carrier at 20% (for both the Narrow and Wide Band
settings) from 100 Hz to 3100 Hz with measurements being taken at every 100 Hz.

Test Results:
The results of the test are shown in Figures 3 and 4 . Below 300 Hz it was not possible to drive the input level high
enough to elicit a 20% modulation level. This is due to the design of the AGC circuit, described in detail in the
Circuit Description document that is part of this filing.

-4-

AC mV RMS Required to Maintain Deviation (500 Hz for Narrow, 1kHz for Wide)

Hz x 100 Narrow Band Modulation Wide Band Modulation
AGC On AGC Off AGC On AGC Off
1 * * * *
2 2.35 * * *
3 1.30 20.5 1.30 21.3
4 .9 14.5 .94 15.0
5 .72 11.75 .75 12.0
6 .59 9.25 .61 9.60
7 .5 7.65 .52 7.90
8 .43 6.30 .47 6.80
9 .40 5.70 .41 6.00
10 .39 5.40 .39 5.55
11 .36 5.00 .36 5.10
12 .34 4.50 .34 4.60
13 .32 4.20 .33 4.30
14 .31 4.05 .32 4.10
15 .31 3.85 .31 4.00
16 .30 3.75 .30 3.80
17 .29 3.55 .29 3.60
18 .28 3.40 .28 3.40
19 .27 3.20 .28 3.20
20 .26 3.00 .27 3.10
21 .26 2.72 .26 3.00
22 .25 2.68 .25 2.70
23 .24 2.55 .25 2.60
24 .24 2.45 .24 2.50
25 .24 2.45 .24 2.45
26 .24 2.55 .25 2.55
27 .24 2.63 .26 2.65
28 .25 2.89 .26 2.90
29 .27 3.25 .28 3.25
30 .30 3.75 .32 3.80
31 .54 8.70 .57 9.80
32 1.1 * 1.20 *
33 6.3 * 7.40 *

* unable to achieve 20% deviation

Figure 3 - Deviation Frequency Response (Pursuant to FCC Requirement 2.1047a) – Raw Data

-5-

100
AC mV RMS Required to Maintain Deviation (500 Hz for Narrow,

10
1kHz for Wide)

1

0.1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Modulation Frequency, 100s of Hz

Narrow Band - AGC On Narrow Band - AGC Off W ide Band - AGC On W ide Band - AGC Off

Figure 4 – Audio Sensitivity as a Function of Input Frequency
(Pursuant to FCC Requirement 2.1047a)

-6-

T-2350 (Digital Body Wire) Modulation Characteristics – Modulation Sensitivity

Relevant FCC Chapter:
“§ 2.1047 Measurements required: Modulation characteristics.
(b) Equipment which employs modulation limiting. A curve or family of curves showing the percentage of
modulation versus the modulation input voltage shall be supplied. The information submitted shall be
sufficient to show modulation limiting capability throughout the range of modulating frequencies and
input modulating signal levels employed. “

Test Setup:
The setup for this test is shown below.

AG Pad ACVM

MA
PS
UUT

AG – Audio Generator – Leader LAG120B – SN 7090853
PS – Power Supply – Kikisui PAB18-38
Pad – 10 dB Pad – Mini Circuits CAT10
ACVM – AC Volt Meter – Leader LMV181A – 3100941
UUT – T-2350 Digital Body Wire
MA – Modulation Analyzer – IFR 2975 – SN 598001503

Test Method:
The unit under test was calibrated to 100% modulation with a 1 kHz tone at a level of 50 mV RMS. This resulted in
FM deviation of 2.5 kHz at the Narrow Band setting and 5 kHz at the Wide Band setting. For the purposes of the
test, the audio input of the unit was driven at 10 mv intervals from 10 to 100 AC mvRMS, as well as 1 AC mV RMS
and 5 AC mV RMS, for each of the audio tones of 500, 1000, and 3000 Hz. At each voltage interval and
frequency, the deviation was recorded with the unit in Narrow Band mode, AGC on and off, and Wide Band
mode, AGC on and off. Measurements above 100% modulation at each frequency were not recorded.

Test Results:
The results of the test are shown in Figures 5, 6 and 7.

-7-

Kilohertz of deviation as a function of audio input level at various frequencies

Audio 500 Hz 1000 Hz 3000 Hz
Input Narrow Wide Narrow Wide Narrow Wide
AGC
ACmvRMS AGC On
Off
AGC On AGC Off AGC On AGC Off AGC On AGC Off AGC On AGC Off AGC On AGC Off

1 700 110 1360 140 1400 150 2840 200 2050 200 4070 310
5 1020 230 1970 460 1800 490 3940 880 2.72* 700 5.36* 1280
10 1040 450 1980 880 2080 880 4200 1710 1300 2470
20 1080 850 2010 1670 2150 1750 4270 3500 2440 4750
30 1100 1070 2200 2130 2290 2190 4480 4500 2.62* 5.15*
40 1600 1590 3200 3170 2.6* 2.6* 5.34* 5.37*
50 2060 2060 4190 4180
60 2320 2310 4730 4710
70 2.52* 2.52* 5.17* 5.15*
80
90
100

* - 100% modulation reached

Figure 5 - Modulation Sensitivity (Pursuant to FCC Requirement 2.1047b) – Raw Data

3

2.5

2
Deviation (kHz)

1.5

1

0.5

0
0 20 40 60 80 100 120
Input Voltage (AC mV RMS)

500 Hz, AGC On 1000 Hz, AGC On 3000 Hz, AGC On
500 Hz, AGC Off 1000 Hz, AGC Off 3000 Hz, AGC Off

Figure 6 - Narrow Band Modulation Sensitivity (Pursuant to FCC Requirement 2.1047b)

-8-

6

5

4
Deviation (kHz)

3

2

1

0
0 20 40 60 80 100 120
Input Voltage (AC mV RMS)

500 Hz, AGC On 1000 Hz, AGC On 3000 Hz, AGC On
500 Hz, AGC Off 1000 Hz, AGC Off 3000 Hz, AGC Off

Figure 7 - Wide Band Modulation Sensitivity (Pursuant to FCC Requirement 2.1047b)

-9-

T-2350 (Digital Body Wire) Occupied Bandwidth

Relevant FCC Chapters:
§ 2.1049 Measurements required: Occupied bandwidth.
The occupied bandwidth, that is the frequency bandwidth such that, below its lower and above its upper
frequency limits, the mean powers radiated are each equal to 0.5 percent of the total mean power radiated
by a given emission shall be measured under the following conditions as applicable:
(c) Radiotelephone transmitters equipped with a device to limit modulation or peak envelope power
shall be modulated as follows.
(1) Other than single sideband or independent sideband transmitters—when modulated by a
2500 Hz tone at an input level 16 dB greater than that necessary to produce 50 percent
modulation. The input level shall be established at the frequency of maximum response of the
audio modulating circuit.

§ 90.210 Emission masks.
(The T-2350 is designed to operate at either 12.5 kHz bandwidth (aka Narrow), 25 kHz bandwidth (Wide), or off.
Under Section 90 part 210, the masks for equipment designated to operate in the 150 to 174 MHz band are
specified in the Applicable Emission Masks Chart, footnote 2.)

“ 2 Equipment designed to operate with a 25 kHz channel bandwidth must meet the requirements of Emission
Mask B or C, as applicable. Equipment designed to operate with a 12.5 kHz channel bandwidth must meet the
requirements of Emission Mask D”

(d) Emission Mask D - 12.5 kHz channel bandwidth equipment. For transmitters 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) On any frequency from the center of the authorized bandwidth f0 to 5.625 kHz removed from f0:
Zero dB.
(2) On 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 7.27 dB.
(3) On 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 + 10 log (P) dB or 70 dB, whichever is the lesser
attenuation.

(b) Emission Mask B - 25 kHz channel bandwidth equipment. For transmitters that are equipped with an audio
lowpass filter pursuant to § 90.211(a), the power of any emission must be below the unmodulated carrier power
(P) as follows:
(1) On any frequency removed from the assigned frequency by more than 50 percent, but not more
than 100 percent of the authorized bandwidth: At least 25 dB.
(2) On any frequency removed from the assigned frequency by more than 100 percent, but not more
than 250 percent of the authorized bandwidth: At least 35 dB.
(3) On any frequency removed from the assigned frequency by more than 250 percent of the
authorized bandwidth: At least 43 + 10 log (P) dB.

- 10 -

Test Setup:
The setup for this test is shown below.

ACVM
AG Pad 1

MA/SA
PS
UUT Pad 2

AG – Audio Generator – Leader LAB120B – SN 7090853
PS – Power Supply – Kikisui PAB 18-3A
Pad 1 – 10 dB Pad – Mini Circuits CAT10
ACVM – AC Volt Meter – Leader LMV181A – SN 3100941
UUT – T-2350 Digital Body Wire
MA – Modulation Analyzer – IFR 2975 – SN 598001503
SA – Spectrum Analyzer – Advantest R3131 – SN
Pad 2 – 10 dB Pad – Mini Circuits CAT10

Test Method:
With the carrier frequency 162.500000MHz and the Power Supply set to 9.0 VDC, the unit under test was
calibrated to 100% modulation with a 1 kHz tone at a level of 10 mV RMS. The Unit was then modulated with a
2500 Hz tone at a level of %50 – 1.25 kHz. The input level was then increased by 16 dB. The deviation was
measured using the IFR 2975 Modulation analyzer, then the output was switched to the spectrum analyzer for
the purpose of measuring the occupied bandwidth. The spectrum was measured with the unit set to each of
the following modes:
Unmodulated Carrier
Narrow Band, Digital Voice Modulation
Narrow Band, AGC On
Narrow Band, AGC Off
Wide Band, AGC On
Wide Band, AGC Off

For the purpose of calculating mask segments, the power of the unmodulated carrier was 1 watt, therefore:

90.210 (b) (3) 43 + 10log(1) = 43 dB
90.210 (d) (3) 50 + 10log(1) = 50 dB

The mask calculations are shown in figures 8, 9, and10

Test Results:
The results of the test are shown in Figures11 - 16.
The unit under test passes per the criteria established in 2.1049 and 90.210.

- 11 -

T-2350 (Digital Body Wire) Spurious Emissions at Antenna Terminals

Relevant FCC Chapters:
§ 2.1051 Measurements required: Spurious emissions at antenna terminals.
The radio frequency
voltage or Narrow and Wide band powers
Harmonic Frequency (MHz)
generated Level (dBc) level (dBc) within the
equipment and appearing on a spurious frequency shall be checked at the equipment output terminals when
properly loaded with a suitable artificial antenna. Curves or equivalent data shall show the magnitude of each
harmonic and other spurious emission that can be detected when the equipment is operated under the
conditions specified in § 2.1049 as appropriate. The magnitude of spurious emissions which are attenuated
more than 20 dB below the permissible value need not be specified.

§ 2.1049 Measurements required: Occupied bandwidth. (c) (1)

§ 90.210 Emission masks. (b) (d)

Test Setup:
The setup for this test is shown below.

PS MA/SA
UUT Pad 2

PS – Power Supply – Hewlett-Packard HP6207B – SN 1149A01889
UUT – T-2350 Digital Body Wire
MA – Modulation Analyzer – Marconi 2955R – SN 132260-001
SA – Spectrum Analyzer – Advantest R3162 – SN 120401992
Pad 2 – 10 dB Pad – Mini Circuits CAT10

Test Method:
The method used for testing Spurious Emissions is identical to the method used for testing the Occupied
Bandwidth. The spectrum was measured with the unit set to each of the following modes:
Narrow Band, AGC On
Wide Band, AGC On

For the purpose of calculating mask segment (b)(3), the power of the unmodulated carrier was 1 watt,
therefore
43 + 10log(1) = 43 dBc

Test Results:
The results of the test are shown in Figures 17, 18, and 19.
The unit under test passes per the criteria established in 2.1051, 2.1049, and 90.210.

F2 324 -62 -60
F3 486 >-70 >-70
F4 648 >-70 >-70
F5 810 >-70 >-70
F6 972 >-70 >-70
F7 1134 >-70 >-70
F8 1296 >-70 >-70
F9 1458 >-70 >-70
F10 1620 >-70 >-70
F11 1782 >-70 >-70
- 16 -

T-2350 (Digital Body Wire) Frequency Stability: Temperature Stability

Relevant FCC Chapter:
“§ 2.1055 Measurements required: Frequency Stability.
(a) The frequency stability shall be measured with variation of ambient temperature as follows:
(1) From -30° to +50° centigrade for all equipment except that specified in paragraphs (a) (2) and (3) of this
section.

[The T-2350 does not qualify under part 47, chapter 2.1055 (a)(2) or (a)(3)]
(c) Frequency measurements shall be made at the extremes of the specified temperature range and at
intervals of not more than 10° centigrade through the range. A period of time sufficient to stabilize all of the
components of the oscillator circuit at each temperature level shall be allowed prior to frequency
measurement. The short term transient effects on the frequency of the transmitter due to keying (except for
broadcast transmitters) and any heating element cycling normally occurring at each ambient
temperature level also shall be shown. Only the portion or portions of the transmitter containing the
frequency determining and stabilizing circuitry need be subjected to the temperature variation test.

90.213
(paraphrased) - For stations operating at less than 2 watts, with a 12.5 KHz channel spacing, and in the
frequency band between 150 and 174 MHz, the frequency stability shall be less than 5 PPM

Test Setup:
The setup for this test is shown below.

EC

PS UUT FC
Pad

PS – Power Supply – BK 1743 – SN 273 0200 0483
EC – Environmental Chamber – Applied Systems BK-1101 – SN 8665
UUT – T-2350 Digital Body Wire
Pad – 10 dB Pad – Mini-Circuits CAT 10
FC – Frequency Counter – HP 5351B – SN 3049A01169

Test Method:
The unit under test was powered at 9.0 VDC and set to a carrier frequency of 162.5 MHz. The unit was
calibrated to 162.5 MHz at an ambient temperature of 22.3O C. The Environmental Chamber was set to –30O C
and swept to +70O C in 10O steps. Due to the small size of the chamber and the UUT, the unit was left at each
temperature for 30 minutes before the measurement was made. Since there is no method of keying the
transmitter or any form of heating element in the UUT, those results are not required.

Test Results:
The results of the test are shown in Figures 20 and 21.

Frequency Deviation (PPM) as a function of temperature

- 19 -

Temp (OC) Fr Dev. (PPM)
-30 -.04
-20 +.07
-10 +.27
0 +.37
10 +.21
20 0
30 0
40 -.24
50 +.83
60 +1.85
70 +3.01

Figure 20 – Frequency Stability (Pursuant to FCC Requirement 2.1055a) – Raw Data

4
3.8
3.6
3.4
3.2
3
2.8
2.6
2.4
2.2
Frequency Deviation (PPM)

2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
-30 -20 -10 0 10 20 30 40 50 60 70
Temperature (deg. C)

Figure 21 - Frequency Deviation (PPM) as a Function of Temperature
(Pursuant to FCC Requirement 2.1055a)

- 20 -

T-2350 (Digital Body Wire) Frequency Stability: Power Supply Stability

Relevant FCC Chapter:
“§ 2.1055 Measurements required: Frequency Stability.
(d) The frequency stability shall be measured with variation of primary supply voltage as follows:
(2) For hand carried, battery powered equipment, reduce primary supply voltage to the battery operating end
point which shall be specified by the manufacturer.

Test Setup:
The setup for this test is shown below.

PS UUT FC
Pad

PS – Power Supply – Hewlett-Packard HP6207B – SN 1149A01889
UUT – T-2350 Digital Body Wire
Pad – 10 dB Pad – Mini-Circuits 10
FC – Frequency Counter – HP 5351B – SN 3049A01169

Test Method:
The unit was calibrated to 162500000Hz with a battery voltage of 9.0 VDC
The Frequency output of the unit under test was measured at supply voltages from 4.0 VDC to 9.0 VDC in .5
VDC increments.

Test Results: The results of the test are shown in Figures 22 and 23.

- 21 -

Frequency Deviation (Hz) as a function of supply voltage

Voltage (VDC) Fr Dev. (Hz)
4.0 5
4.5 5
5.0 5
5.5 5
6.0 5
6.5 5
7.0 0
7.5 0
8.0 0
8.5 0
9.0 0

Figure 22 – Frequency Stability (Pursuant to FCC Requirement 2.1055d) – Raw Data

6

5

4
Frequency Deviation (Hz)

3

2

1

0

-1
4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9
Pow er Supply (VDC)

Figure 23 - Frequency Deviation (Hz) as a Function of Supply Voltage
(Pursuant to FCC Requirement 2.1055d)

- 22 -

Document Created: 2005-03-23 10:48:41
Document Modified: 2005-03-23 10:48:41

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