FRIENDCOM FC-301/D User manual

FC-301/D
USER MANUAL
SHENZHEN FRIENDCOM TECHNOLOGY DEVELOPMENT CO.,LTD
ADD: 6/F, 17 Building , Guangqian Industrial Park, Longzhu Road, Xili Town, Nanshan,
Shenzhen City 518055 P.R.CHINA.
TEL: +86-755-86026600 +86-755-86026192 FAX: +86-755-86026300
WEBSITE: www.friendcom.cn

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TABLE OF CONTENTS
TABLE OF CONTENTS .....................................
.
01
..
SPECIFICATIONS ..........................................02
CIRCUIT DIAGRAM........................................07
INTRODUCTION...........................................08
FEATURES................................................08
TROUBLE SHOOTING GUIDE...............................09
WIRING DIAGRAM.........................................10
PROGRAMMING ..........................................13
FACTORY DEFAULT SETTING ..............................27

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SPECIFICATION
GENERAL
Equipment Type…………………………………Data Radio
Performance Specification…………..................TIA/EIA-603 & ETS 300-113
Band …………………………………………...UHF/VHF
Channel Spacing………………………………25KHz,12.5KHz programmable
RF Output Power……………………………….1W - 5W Programmable
Modulation type ………………………………..16K0F3E,8K5F3E
Intermediate Frequency………………………… 45.1MHz & 455KHz
Number of Channels…………………………….16
Frequency Source ……………………………….Synthesizer
Operation Rating…………………………………Intermittent
5:5:90 ( TX: RX: Standby )
Power Supply ……………………………………12.5V DC Nominal Voltage
Temperature Range
Storage………………………………………from –40°C to +80°C
Operating……………………………………from –30°C to +60°C
Current Consumption
Standby (Muted) ……………………………≤40mA
Transmit 5 Watts RF Power …………………< 1.5A
Transmit 1 Watt RF Power…………………..<0.8A

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Frequency Bands ………………RX UHF: 400 – 470 MHz VHF: 136 – 174 MHz
………………TX UHF: 400 – 470 MHz VHF: 136 – 174 MHz
Dimensions………………………………………..(120mm)L x (60mm)W x (20mm)H
Weight……………………………………………..≤150 grams
TRANSMITTER
Sustained Transmission…………………………… Nominal conditions
Time: 5 10 30sec
Power: >95% >95% >90%
Frequency Error…………………………………..±2.5 ppm
Frequency Deviation:
25kHz Channel Spacing……………………..≤±5.0kHz,
12.5kHz Channel Spacing……………………≤±2.5kHz,
Audio Frequency Response………………………. Within +1/-3dB of 6dB octave
@300Hz to 2.55kHz for 12.5kHz C.S
@300Hz to 3.0khz for 25kHz C.S
Adjacent Channel Power
25kHz…………………………………………< 70 dBc @ Nominal Condition
<65 dBc @ Extreme Condition
12.5kHz ………………………………………< 60 dBc @ Nominal Condition
< 55 dBc @ Extreme Condition
Conducted Spurious Emission …………………….< -36 dBM
Modulation Sensitivity……………………………. 100mV RMS@60% peak Dev.
Hum & Noise:
25kHz Channel Spacing………………….….>40 dB (with no PSOPH)

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12.5kHz Channel Spacing………………..……>36 dB (with POSPH)
Modulation Symmetry ……………………………..<10% Peak Dev@1kHz input
for nominal dev +20dB
Load Stability……………………………………No osc at >= 10:1 VSWR all
phase angles and suitable antenna
Nodestroyat>=20:1allphaseangle
RECEIVER
Sensitivity(12dB Sinad) ………………………….UHF <-117 dBm,
VHF<-1[email protected]
Amplitude Characteristic………………………….<±3dB
Adjacent Channel Selectivity:
25 kHz Channel Spacing …………………….≥70dB @ Nom.
12.5kHz Channel Spacing…………………….≥60dB@Nom.
Spurious Response Rejection………………………70dB
Image Response…………………………………… > 70 dB
IF Response ………………………………………. >70 dB
Others………………………………………………> 70 dB
Intermodulation Response Rejection………………≥65 dB
Conducted Spurious Emission @ Nominal Conditions………<-57 dBm
AF Distortion ………………………………………………....<5% @ Nom.,
<10%@ Extreme Condition
RX Hum & Noise:
25.0kHz CP……………………………………………< 40dB No PSOPH
12.5kHz CP ………………………………………..…< 40dB with PSOPH

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Receiver Response Time …………………………….< 20ms
Squelch Opening sensitivity: ………………………-118dBm
Squelch Closing sensitivity ……………………….. -121dBm
Squelch Attack Time:
RF Level at Threshold ………………………… <40ms
RF Level at Threshold +20dB…………………<30ms
L.O. Frequency Temperature Stability…………….1 st <2.5 ppm,
2 nd <10 ppm for –30°C to +60°C
L.O. Frequency Aging Rate………………………….±2 ppm/year
REFERENCE CRYSTAL
Frequency…………………………………………………. 13MHz
Temperature Characteristic……………………………+/- 2.5PPM
from –30°C to +60°C
Aging Rate……………………………………………….< 2ppm/year in 1 st year
<1ppm/year thereafter
Lock Time …………………………………………………<10 ms
TX to RX ………………………………………………… < 20 ms
RX to TX ………………………………..……………….. < 25 ms
ENVIRONMENTAL ( performance without degradation unless stated)
Temperature……………………………………………… deg C
Operating………………………………………………….-30° to +60°C Degradation
Specified@Extreme
Storage …………………………………………………… -40°C to +80°C

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Recharging ……………………………………………… -10 to +55
ESD………………………………………………………. 20kV (C-MIC >= 15kV)
Vibration………………………………………………… MIL STD 810 C Procedures I,II,V
and IEC68 26
·
Due to continuing researching and development the company reserves the
right to alter these specifications without prior notice.

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FC-301/D CIRCUIT DIAGRAM
Fig.1. Circuit diagram

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INTRODUCTION
The FC-301/D Series of RF Link Modules from Friendcom utilizes the latest
technology in its design and manufacturing. Both the UHF and VHF models
are PLL (Phase Lock Loop Synthesizer) / microprocessor controlled, and offer
one to five watts of power with 16 channel capability. Multiple functions
including AC audio coupling, 1200 to 9600 baud rates GMSK and FSK
modulation capability are standard in these fully programmable wide
bandwidth RF Link Module units.
FEATURES
●16 Channels
●1- 5 Watt Programmable Output
●12.5 / 25 kHz Programmable Channel Spacing

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TROUBLE SHOOTING GUIDE
Table 1: Trouble shootings
SYMPTOM S
CAUSES
COUNTERMEASURES
Unit does not work
1.No power incomplete
connection
2. No input voltage of 5V or 8V
3. CPU does not work
4. EEPROM fail
5. Channel error
6. PLL error
1.Check COM1 connection
2. Check IC500、IC504
3. Check IC510
4. Check IC502
5. Check CF3
6. Check TCXO、VCO、PLL IC
Bad RX Sensitivity
1.Antenna signal short-circuit
2.Antenna signal open-circuit
3. Bad electronic turner
4. Defective high frequency
amplifier
5. Bad mixer
6. Local signal amplitude
become small
7. Bad 1st and 2nd intermediate
frequency
1. Check D106 D107
2. Antenna loose weld
3. Check L23 L24 L25 L26
4. Replace Q15
5. Check IC3 T3 T4
6. Check D103 Q111
7. Check XF1 XF2 IC2
Defective RX
1. No output signal
2. Bad signal waveform
3. Bad stability of VCO
1. Replace IC801
2. Check U2 c412 c404
3. Check component of VCO
PLL Error
1. TCXO frequency error
2. Bad stability of VCO
3. PLL can’t be locked
1.Check crystal oscillator of TCXO
2.Check the component of
TX/RXVCO
3. IC301 Q321 Q320 C327
Low TX Power
1. Bad amplifier circuit
2. Bad APC circuit
1. Replace IC102
2. Check D102 IC1
No TX Power
1. No power on TX
2. No signal on driver
3. Bad amplifier circuit
4. Bad APC circuit
1. Check Q502 Q503
2. Check Q1 Q2 D101
3. Check IC102 D102
4. Check IC1
No Modulation
1. No input signal
2. No TX signal
1. Check IC801
2. Check U1 R403 R404

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WIRING DIAGRAM
The standard FC-301/D is shown as below picture. The pins of CON1, CON2
and CON3 are all connected via the bridge board (As shown in Fig.2 and
Fig.3).
Fig.2. FC-301/D with bridge board

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Fig.3. Wiring diagram

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Table2 : Pin Description
Pin
Function
Type Range Description
Pin 1
Audio in(Data
TX)
Input
200mVP-P ------
300mVP-P
External Modulation Input
Pin 2
Audio out (Data
RX )
Output
150mV-250mV
Demodulation Output
Pin 3
PTT
Input
0V/+5V
Transmit Enable
0V - Radio in Transmit status
5V - Radio in receive
status(Default )
Pin 4
GND
GND
0V
GND
Pin 5
B+
V+
10-15V
Power Supply(+12.5V typical )
Pin 6
SQ
Output
Open/Short
RF Carrier Detect
Open -- low level,
Short -- high level (Default).
Pin 7
RSSI
Output
0.8V-2.2V
Pin 8
Switch
Input
0V/5V
Programming Enable
0V - Radio programmable
5V - Radio work (Default )
Pin 9 Speaker
Output
8ohm /0.5W

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PROGRAMMING
When you want to program FC-301/D, you should connect the radio with the
program cable (TTL to RS-232) to PC as shown in below Fig. 4.:
Fig.4. Program cable of FC-301/D
And the radio should be connected with the bridge board as shown in Fig.2.
FC-301/D should be connected with PC via program cable as Fig.4. when in
program mode. The detailed description as below:
Red wire (Pin 5): Power supply +12.5V,
Black wire (Pin 4): Power negative (GND).
Yellow wire(Pin 8): GND. (Yellow wire to GND for program, hung for

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normal work mode).
Run program software ‘QuickSet.exe’ for FC-301/D to program the radio. The
detailed procedures on programming FC-301/D as following:
Ⅰ. To start FC-301/D Program Software and read the parameters of FC-301/D
RF Link Module
Step 1: Make sure the radio FC-301/D is in program status (pin8 SW of
CON1(DB9) in low level-GND) and the connection is ready between
FC-301/D and PC via program cable.
Step 2: Double click ‘QuickSet.exe’ for FC-301/D. It will enter into program
interface of FC-301/D as following:

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Fig.5.
Step 3: Click Icon ‘Port’ , choose and open the right serial port of PC.

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Fig.6.
Step 4: Click Icon ‘Read’, the software will automatically detect and read the
parameters of FC-301/D as shown in Fig.7.

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Fig.7.
The basic information about the radio will be displayed:
Model:FC-301/D
Hardware version: Indicates the hardware version.
Firmware version: Indicates the software version of the radio.

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Frequency range: Indicates the frequency range.
Current channel:the default current channel 1.
ID: User can Input 5 digits(decimal) for ID code(for example 12345) (range
from 0 to 65535). Zero will be added to the front.. You can set an ID for
different FC-301/D. It can be changed by ‘Write’ as fig.8.
Fig.8.

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Ⅱ. To read / write the frequency and the Tx power of each channel
Click ‘Read ’, the frequency and the Tx power of each channel from 1 to 16
will be displayed on the screen as shown in Fig.9.
Fig.9.
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