Furuno FS-2570 Manual

Pub. No.: SB-2241
Date : November 1, 2002
TECHNICAL
INFORMATION
TEST REPORT ON THE PERFORMANCE OF
MARINE SSB RADIO TELEPHONE
Trade Name: FURUNO
Type: FS-2570
FURUNO ELECTRIC CO., LTD.
NISHINOMIYA CITY, JAPAN

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Date : November 1, 2002
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November 1, 2002
All data herein contained is true and correct to my best knowledge.
Masayuki Mori
Manager
Radio Communication Engineering Section,
Research and Development Department,
Marine Electronic Products Division
FURUNO ELECTRIC CO., LTD.

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***** CONTENTS *****
1GENERAL INFORMATION................................................................................................3
1.1 Specifications...............................................................................................................3
1.2 List of Test Equipment Used.......................................................................................4
2 IDENTIFICATION OF EQUIPMENT (FCC Rule Part 2.925)...........................................6
3TEST DATA........................................................................................................................7
3.1 RF POWER OUTPUT (FCC Rules Part 80.215 & 2.1046).......................................7
3.2 MODULATION CHARACTERISTICS (FCC Rule Part 2.1047).............................10
3.2.1 Audio Frequency Response (FCC Rules Part 2.1047 (a) & 80.213)..............10
3.2.2 Power Limiting vs. Audio Input Voltage (FCC Rule Part 2.1047).....................12
3.3 OCCUPIED BANDWIDTH (FCC Rule Part 2.1049)................................................14
3.4 EMISSION LIMITATIONS (FCC Rule Part 80.211)................................................26
3.5 SPURIOUS EMISSIONS AT ANTENNA TERMINAL (FCC Rule Part 2.1051)......27
3.6 FIELD STRENGTH OF SPURIOUS RADIATION (FCC Rule Part 2.1053)...........40
3.7 FREQUENCY STABILITY (FCC Rule Part 2.1055).................................................46
3.8 SUPPRESSION OF INTERFERENCE FROM RECEIVER (FCC Rules Part
80.217 and 2.1051)....................................................................................................54
4TRANSMITTER POWER ADJUSTMENT PROCEDURE (FCC Rule part 2.1033)......55
5PHOTOGRAPHS TO REVEAL EQUIPMENT CONSTRUCTION AND LAYOUT
(FCC Rule Part 2.1033)....................................................................................................56
6DESCRIPTION OF CIRCUITRY AND DEVICES (FCC Rule Part 2.1033)...................57
6.1 Function of Each Semiconductor or Active Device.....................................................57
6.2 Description of the circuits employed for suppression of spurious radiation, for
limiting or shaping the control pulse, and for limiting or controlling power...................65
7Operators Manual incl. Circuit Diagrams (FCC Rule Part 2.1033)................................66

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1GENERAL INFORMATION
1.1 Specifications
(a) Manufacturer: Furuno Electric Co., Ltd.,
Ahihara-cho 9-52, Nishinomiya-city,
662-8580 Japan
(b) Model: FS- 2570
(Serial No.: 3536-0002)
(c) Frequency Range: 1.6 to 27.5 MHz (transmit)
0.1 to 29.9 MHz (receive)
(d) Class of Emission: J3E (LSB/USB, Telephony)
H3E (receive only)
F1B,
J2B (DSC, NBDP)
F3C (receive only)
(e) RF Output Power: 250 W
(e) Power Supply: 24 V DC
1.5 A (receive)
35 A (max) (transmit)
(f) Dimensions & Weight: (1) Transceiver unit (FS-2570T),
560 mm (H) x 340 mm(W) x 135 mm(D)
15.0 kg
(2) Antenna Coupler (AT-1560-25),
390 mm(H) x 267 mm(W) x 90 mm(D)
8.7 kg
(3) Control unit (FS-2570C)
121 mm(H) x 300 mm(W) x 110 mm(D)
1.8 kg
(4) Handset (HS-2001),
200 mm(H) x 55 mm(W) x 77 mm(D)
0.6 kg

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1.2 List of Test Equipment Used
(a) SPECTRUM ANALYZER
Manufacturer: Takeda Riken
Model: TR 4173
S/No: 85580030
(b) 50ΩLOAD/ WATT METER:
Manufacturer: Tokyo Denpa
Model: DJ 522-OH-2
DC to 30 MHz: 50 Ω250/500 W
S/No: 46507
(c) DC POWER SUPPLY
Manufacturer: Takasago
Model: GP 035-50R
0 to 35 VDC, 0 to 50 A
S/No: 13086029
(d) PLOTTER
Manufacturer EPSON
Model: HI-80
S/No: 02006569
(e) BROADBAND ROD ANTENNA
Manufacturer: AILTECH
Model: 95010-1
10 kHz to 40 MHz
S/No: 496
(f) BICONICAL ANTENNA
Manufacturer: ELECTRO METRICS
Model: BIA-25
20 MHz to 220 MHz
S/No: 2650
(g) FREQUENCY COUNTER:
Manufacturer TAKEDA RIKEN
Model: TR5824
10 Hz to 600 MHz: 5 x 10 -8/day
S/NO:. 41930036
(h) AUDIO SIGNAL GEN (2 ea.):
Manufacturer KENWOOD
Model: AG-253
50 Hz to 1 00 MHz, 600Ω
S/No:1100026 & 709003
(i) AUDIO VOLT METER:
Manufacturer: Kikusui Electronics Corp.:
Model: 161E
S/No: 2961776

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(j) OSCILLOSCOPE:
Manufacturer: SONY TEKTRONIX
Model: 2445
S/No: B02576
(k) STORAGE OSCILLOSCOPE:
Manufacturer: TEKTRONIX
Model: 2330
S/No: 300462
(L) MODULATION ANALYZER:
Manufacturer: HEWLETT PACKERD
Model: 8901B
S/No: 2718A01184

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2 IDENTIFICATION OF EQUIPMENT (FCC Rule Part 2.925)
The following nameplates are permanently fixed on the equipment.
FCC ID: ADB9ZWFS2570
Material of nameplate: Polyester film t 188 µm
ON TRANSCEIVER UNIT:
(mm)
ON ANTENNA COUPLER UNIT:

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3TEST DATA
3.1 RF POWER OUTPUT (FCC Rules Part 80.215 & 2.1046)
3.1.1
Method of Measurement
The FS-2570 is connected with measuring equipment as shown in Fig. 3.1.1.
Supply voltage is set to 24 VDC. An ammeter is connected in series with collector of each final
stage transistor. Test is made under normal environmental condition.
2 Audio Signal Generators generating each 400 Hz and 1800 Hz at an equal level are
adjusted to produce transmitter RF output power 250 Wpep. Collector current is then
measured.
Measurement is made on every test f frequency on class of emission J3E.
Fig. 3.1.1
OSCILLOSCOPE
Model 2445
S/N:B025716
SONY TEKTRONIX
EUT
SSB RADIOTELEPHONE
VOLT METER
AMMETER
50Ω/250W
WATT METER
Model DJ522 - OH -2
S/N:46507
TOKYO DENPA
DCPOWER SUPPLY
Model GP 035 -50R
S/N:13086029
TAKASAGO
AUDIOSIGNALGEN.
ModelAG-253
S/N: 1100026
KENWOOD
AUDIOSIGNALGEN.
ModelAG-253
S/N: 7090003
KENWOOD
AUDIO VOLT METER
Model 161E
S/N:2961776
KIKUSUI
(ANT.)(Audio Input)

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3.1.2Test Result
Results are shown in Table 3.1.1
Table 3.1.1
Frequency
(kHz) Class of Emission Supply Voltage
(VDC)
Collector
Current (A) PEP (W)
1605.0 J3E 24 22 250
2182.0 J3E 24 17 240
3023.0 J3E 24 16.8 240
4065.0 J3E 24 18.8 230
6200.0 J3E 24 18.8 220
8195.0 J3E 24 16.0 220
12230.0 J3E 24 15.2 220
16360.0 J3E 24 17.0 240
18780.0 J3E 24 15.0 220
22000.0 J3E 24 16.0 210
25070.0 J3E 24 16.0 200
Power is calculated by doubling the readout of Wattmeter showing average power as
explained in paragraph 3.1.3 below.
3.1.3Relation between Average Power and Peak Envelope Power
3.1.3.1 CW (Single Tone):
(Vpp/2√2)2 Vpp2
Average power: Pa = ---------------- = ------------
R
L 8 RL
(Vpp/2√2)2 Vpp2
PEP: Pp = ---------------- = -----------
RL 8 RL
Therefore; Pa = Pp
Vpp

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3.1.3.2 AM:
m2
Average power:Pa= (1+ ------- )・Pc
2
where, Pc: carrier power, m: depth of modulation.
(A/√2)2A2
While, Pc = -------------- = ----------
RL2R
L
and, Vpp = 2 (1 + m)・A
1Vpp Vpp2
Therefore, Pc = --------・( --------------- )2= ----------------------
2RL2(1 + m) 8(1 + m)2・RL
m2Vpp2
Therefore, Pa = (1 + -------- )・--------------------
28(1 + m)2・RL
(Vpp/2√2)2Vpp2
PEP: Pp = ------------------- = ---------
RL8RL
m2Pp
Therefore, Pa = (1 + -------- )・-------------
2 (1 + m)2
(1 + m)2
or, Pp = -----------------・Pa
1+ m2/2
m=1:Pp = 2.67 Pa
m=0.8 : Pp = 2.47 Pa
m=0.5 : Pp = 2.1 Pa
Vpp
m・A
A

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3.2 MODULATION CHARACTERISTICS (FCC Rule Part 2.1047)
3.2.1Audio Frequency Response (FCC Rules Part 2.1047 (a) &
80.213)
3.2.1.1 Method of Measurement
The FS-2570 is connected with measuring equipment as shown in Fig. 3.2.1.1.
A single audio tone is applied to the transmitter and varied over the range 100 to 5000 Hz.
Output power is measured for variation of audio frequency with the output level 30 W referred
to as 0 dB.
Fig. 3.2.1.1
3.2.1.2 Test Result
1. Output level for respective audio frequency is plotted in Fig. 3.2.1.2.
2. Carrier levels on each mode are as in Table 3.2.1.
Table 3.2.1
Class of
emission mode below pep Limit
J3E Suppressed Carrier mode 56.2 dB at least 40 dB
EUT
SSB RADIOTELEPHONE
Watt Meter
Model DJ522-OH-2
S/N:46507
Tokyo Denpa
DCPower Supply
Model GP035-50R
S/N:13086029
Takasago
AudioVolt-Meter
Model 161
S/N:2961776
Kikusui
-43 dB Coupler
Spectrum Analyzer
Model TR4173
S/N: 85580030
Takeda Riken
Plotter
Model HI-80
S/N:02006569
Epson
Audio SignalGen.
Model AG-253
S/N:1100026
Kenwood
Audio Signal Gen.
Model AG-253
S/N: 7090003
Kenwood

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Fig. 3.2.1.2 Audio Frequency Response

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3.2.2Power Limiting vs. Audio Input Voltage (FCC Rule Part 2.1047)
3.2.2.1 Method of Measurement
The FS-2570 is connected with measuring equipment as shown in Fig. 3.2.2.1.
2 audio tones of 400 Hz and 1800 Hz are applied to the transmitter in equal level. The input
level is varied and PEP is measured.
Fig. 3.2.2.1
OSCILLOSCOPE
Model 2445
S/N:B025716
SONY TEKTRONIX
EUT
SSB RADIOTELEPHONE
VOLT METER
AMMETER
50Ω/250W
WATT METER
Model DJ522 - OH -2
S/N:46507
TOKYO DENPA
DCPOWER SUPPLY
Model GP 035 -50R
S/N:13086029
TAKASAGO
AUDIOSIGNAL GEN.
ModelAG-253
S/N: 1100026
KENWOOD
AUDIOSIGNAL GEN.
ModelAG-253
S/N: 7090003
KENWOOD
AUDIO VOLT METER
Model 161E
S/N:2961776
KIKUSUI
(ANT.)(Audio Input)

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3.2.2.2 Test Result
Measurement is made on frequency 4065 kHz. The results are shown in Fig. 3.2.2.2.
Fig. 3.2.2.2 Power Limiting vs. Audio Input Voltage

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3.3 OCCUPIED BANDWIDTH (FCC Rule Part 2.1049)
3.3.1 Method of Measurement
The FS-2570 is connected with measuring equipment as shown in Fig. 3.3.1.
2 audio tones of 400 Hz and 1800 Hz are applied, in equal level, to the transmitter. The level
is adjusted to 10 dB above the level producing PEP output of 250 W for test frequencies 4
MHz or below.
The output is monitored with Spectrum Analyzer with settings of span 50 kHz, IF bandwidth
(resolution bandwidth) 300 Hz and video bandwidth 300 Hz.
Fig. 3.3.1
3.3.2Test Result
Results are shown in Fig. 3.3.2 to 3.3.12 for J3E (USB) and Fig. 3.3.13 to 3.3.22 for F1B, J2B.
Occupied bandwidth is a bandwidth in which 99 % of the mean power radiated falls.
EUT
SSB RADIOTELEPHONE
WattMeter
Model DJ522-OH-2
S/N:46507
Tokyo Denpa
DCPower Supply
Model GP035-50R
S/N:13086029
Takasago
AudioVolt-Meter
Model 161
S/N:2961776
Kikusui
-43 dB Coupler
Spectrum Analyzer
Model TR4173
S/N: 85580030
Takeda Riken
Plotter
Model HI-80
S/N:02006569
Epson
Audio SignalGen.
Model AG-253
S/N:1100026
Kenwood
Audio Signal Gen.
Model AG-253
S/N: 7090003
Kenwood

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Fig. 3.3.2 - (Fc: 1.6 MHz, J3E)
Fig. 3.3.3 - (Fc: 2 MHz, J3E)

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Fig. 3.3.4 - (Fc: 3 MHz, J3E)
Fig. 3.3.5 - (Fc: 4 MHz, J3E)

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Fig. 3.3.6 - (Fc: 6 MHz, J3E)
Fig. 3.3.7 - (Fc: 8 MHz, J3E)

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Fig. 3.3.8 - (Fc: 12 MHz, J3E)
Fig. 3.3.9 - (Fc: 16 MHz, J3E)

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Fig. 3.3.10 - (Fc: 18 MHz, J3E)
Fig. 3.3.11 - (Fc: 22 MHz, J3E)