Abell A-510T Service Manual Download Page 15 | Manualshive

Page: 15 / 53

background image

A-510T（UHF）Ver1.0

15/53

Chapter 5 Unit circuit introduction

5.1

DMR digital circuit Signal block diagram

4FSK digital signal channel process of Block diagram of DMR digital circuit:

（

1

）

Via MIC, voice comes into NJM2904V, being amplified; After that DSP digital signal is processed to 4FSK

digital modulating signal, which are sent to VCO and crystal modulator by two ways as MDO1/MOD2, then sent out
by transition circuit.

（

2

）

The 4FSK digital modulation signal received by acceptor circuit is sent to SCT3258TD DSP digital signal

processing; and it was demodulated by AMBE3000 to be 4FSK digital audio signal; then TDA2822 power amplifier
will magnify and drive SP speaker.

5.1

Circuit structure

The two way radio consists of microprocessor control circuit, receiving circuit, transmission circuit, carrier
frequency/baseband processing circuit, audio power amplifier circuit, battery/power circuit.
Radio-frequency carrier signal is directly produced by radio frequency/baseband processing chip; chopped wave
frequency in band and the principle block diagram of whole machine can be set by writing frequency software on
PC. (Refer to figure 1)

BAP65-03

Q6

RF AMP

ANT

U307

TDA2822

SP

SCT3258TD

IP data port

MIC

U306

NJM2904

Q4

TX AMP

Q3

PA AMP

DMR Circuit Structure

U302

data/vocie port

AMBE-3000

Encoder/Decoder

AD/DA switch

Frame Encoding

Frame Decoding

Modulation

Frame Header/Vaild Date

Demodulation

TDMA

12.8M

MOD2

D1 D3

X2

Voice

VCO

0/90

Q

ADC

Q

PGA

PA_drvier

MOD1

IF-IN

TLV320AIC3204

CODEC DEMOD

VCO

«
...
13
14
15
16
17
...
»

Summary of Contents for A-510T

Page 1: ...A 510T UHF Ver1 0 1 53 A 510T UHF Service Manual ...

Page 2: ...BLE THE BELT CLIP 10 4 2 ASSEMBLE AND DISASSEMBLE ANTENNAAND KNOB 11 4 3 DISASSEMBLE INTER MACHINE 12 4 4 DISASSEMBLE PCB BOARD 13 4 5 EXPLORATION CHART OF PARTS 14 CHAPTER 5 UNIT CIRCUIT INTRODUCTION 15 5 1 DMR DIGITAL CIRCUIT SIGNAL BLOCK DIAGRAM 15 5 1 CIRCUIT STRUCTURE 15 5 2 RECEIVING PART 16 5 3 TRANSMISSION PART 16 5 4 FREQUENCY SYNTHESIZER BASE BAND PROCESSOR 17 5 5 POWER 19 5 6 CONTROL SY...

Page 3: ... OF RECEIVING GROUP 26 6 2 4 LIST OF RADIATE CONTACTS 26 6 2 5 RADIATING AND RECEIVING COLOR CODE 26 6 2 6 TIMESLOT SELECTION 26 6 2 7 CHANNEL TIME SLOT CALIBRATOR 27 6 2 8 TDMADIRECT MODE 27 6 2 9 ENCRYPTION FUNCTION 27 6 2 10 BASIC ENCRYPTION KEY 27 CHAPTER 7 DEBUGGING FOR WHOLE MACHINE 29 7 1 THE REQUIRED TEST EQUIPMENT 29 7 2 DEBUGGING INTRODUCTION 30 CHAPTER 8 SPECIFICATIONS OF PERFORMANCE 35...

Page 4: ...ransmission safety for human when you use two way radios for communication please keep the two way radio perpendicular to the ground and your month away from microphone 2 5 5 cm Electromagnetic interference In order to avoid electromagnetic interference please turn off two way radio when you are in the places where there is clear indication to turn off the two way radio such as hospital airport Ex...

Page 5: ...o listen 2 3 5 are the function keys K1 K2 K3 relatively These keys are programmable function key such as long key key press time should reach the time we set for long key and short key normal key which can be set for different functions Press it to enable programmable auxiliary functions 4 Microphone 6 Channel switcher Rotate it to select channel 1 16 7 Power switch volume control knob Clockwise ...

Page 6: ...emergency alarm Steady state monitoring Analog mode If it is in a state of non automatic reset press this key to be in the monitoring state press it again to quit the monitoring state Transient state monitoring Analog mode If it is in a state of non automatic reset press this key to be in monitoring state release it to quit the monitoring state Steady state Cancelling squelch Analog mode When pres...

Page 7: ...A 510T UHF Ver1 0 7 53 One key call 1 5 DMR Shortcut calling key press it to come into shortcut calling mode then press PPT to send calling auxiliary service function ...

Page 8: ... Mode type Operation steps user mode Boot whilst automatically come into user mode PC mode Use programming cable to connect with PC Debugging mode Through programming software come into debugging mode 3 3 PC mode 3 3 1 Preface Use programming cable to connect two way radio and PC operate programming software ABELL A 510T programming software on PC to make programming setting for communication equi...

Page 9: ... used for connecting A 510 and PC There is a level switching circuit in its D model sub socket 9 cores this circuit can convert RS 232C logic level to transistor logic level PC programming interface cable can connect A 510 side socket and PC RS 232C serial port Description of programming software ABELL A 510 programming software installed can allow user to conduct programming setting on A 510 thro...

Page 10: ...A 510T UHF Ver1 0 10 53 Chapter 4 Disassembled parts in maintenance process 4 1 Assemble and disassemble the belt clip Loosen these two screws to disassemble back splint ...

Page 11: ...A 510T UHF Ver1 0 11 53 4 2 Assemble and disassemble antenna and knob 1 Loosen antenna by rotating 2 Pull out the volume and channel knob 3 Loosen the three nuts 4 Loosen the two rear screws ...

Page 12: ...A 510T UHF Ver1 0 12 53 4 3 disassemble inter machine 1 Uplift the aluminum she ll of inter machine from its bottom 2 When inter machine is over the plastic shell of the bottom pull it to backwards 1 2 ...

Page 13: ...A 510T UHF Ver1 0 13 53 4 4 Disassemble PCB Board 1 Loosen all screws on PCB board 2 Use soldering iron to seal off the tin of antenna pedestal 3 Uplift PCB board from the front end 1 2 ...

Page 14: ...A 510T UHF Ver1 0 14 53 4 5 Exploration Chart of Parts ...

Page 15: ...nd drive SP speaker 5 1 Circuit structure The two way radio consists of microprocessor control circuit receiving circuit transmission circuit carrier frequency baseband processing circuit audio power amplifier circuit battery power circuit Radio frequency carrier signal is directly produced by radio frequency baseband processing chip chopped wave frequency in band and the principle block diagram o...

Page 16: ...requency amplifier Q6 for amplification after the signal is amplified by Q6 then the unwanted signal is filtered out by L15 and C57 and the useful signal comes into U9 RFIN Refer to figure 2 5 3 Transmission part 1 Radio frequency power amplifier The radio frequency signal produced by U9 is amplified by pre amplifier Q8 then the amplified signal is amplified by driving amplifier Q4 after that it i...

Page 17: ...oltage is in direct proportion The output voltage can control the power amplifier of field effect tube and maintain the constant of output power of transmission part The output power of transmission part can be changed by microprocessor and the reference voltage can be changed by microprocessor to control output power 4 Temperature protection circuit When the temperature of thermistor TH1 reaches ...

Page 18: ...igh low level to output the voice the microprocessor U300 sends a high level signal to FM MUTE control wire by Q302 and enable the audio power amplifier U306 3 QT DQT code The received carrier frequency is demodulated to be audio signal by U302 and that audio signal is filtered by filter to remove the unwanted signal then the signal is changed into plus signal by U302 analog digital converter then...

Page 19: ...e whether to enable transmission by detecting the input high low level Refer to figure 5 SP IF AMP DET DET LPF U9 RD1846S FM IF LPF HPF TDA2822 U306 Q302 Power SW QT DQT U300 CPU BUSY FM_MUTE AFCO TI Chart 5 AF Amplifier and Squelch W N De_emphasis U302 SCT3258TD U9 RD1846S FM IF VCO U307 MIC NJM2904V M1 9 Voice prompt Chinese English voice broadcast signal can be produced by U316 and the signal t...

Page 20: ...equency output and the clock of microprocessor adopts C394 C409 R336 R337 R339 and X300 to contribute the coming out of 12 228MHz oscillator Refer to figure 7 RESET EEPROM 12 228MHz X300 XOUT XIN SDA SCL WP 24C512 U318 S 80122ANMC U317 RESET STM32F103VBT6 U300 PTT MONI PTT MONI K1 K2 Chart 7 CPU FUNC ALARM K3 K4 FUNC ALARM U314 XC6204B502M R 5V 5R RX_CTL DC SW U313 LM 2734XM K Vcc7 5V DC DC U309 U...

Page 21: ...e of warning 6 3V default the red LED will blink and sound the warning tone of low power please charge 2 Chart 8 When the battery voltage drops to below the transmission latching voltage the radio will immediately stop transmission when you press PPT switch there will be a prompt tone du coming out and when release it there will be a low power please charge Refer to figure 8 U300 STM 32F 103VBT6 C...

Page 22: ...ort the broadcast of voice channel and prompt broadcast of electricity power so as to understand channel and low power to charge timely 6 1 5 One key call The functions of one key call include short message voice call and supplementary service 6 1 6 Call confirmation When the calling party initiates a call the called party can choose the call confirmation 6 1 7 Rich supplementary application It ca...

Page 23: ...sently With voice instead of pressing the PTT key use voice to control transmission by microphone 6 1 13 Emergence alarm function Emergence alarm system consists of Analog alarm and digital emergence alarm 6 1 14 Low power warning function When battery voltage is low the indicator light will blink If battery power is below the default value during the process of two way radio signal transmission t...

Page 24: ...scan If never radiate the channel will be the one before scan entering Priority Replying with the priority channel configured Priority present If not standing in a certain channel the transmission channel will be the priority channel If the scan stands in a certain channel this channel will be the one for transmission Default off Note if there is no priority channel the priority related options wi...

Page 25: ...ote when the timeout of timer is arrival the transmit overtime will indicate on the screen Pre warning time you can set how long the time before the timeout the two way radio will sound pre warning voice When pre warning voice sounds and the appointed time is passed the TOT is arrival Range closed 0 1 15 seconds Step value 1 second Default 3 seconds 0 represents there is no pre warning function No...

Page 26: ...ion among other systems but when you want to monitor many systems set different color code on many digital channels you can enable the scan function to make host monitor the activities of many systems Value range 0 15 Default 1 6 2 6 Timeslot selection DMR adopts TDMA technique to divide 12 5k Hz channel into two alternative time slot and user can choose either of them to conduct voice communicati...

Page 27: ...t choice this two way radio should be first preferred as channel time slot calibrator When TDMA direct mode operation is not ticked the parameter is read only Default disqualified 6 2 8 TDMA direct mode Set TDMA direct mode function about whether to enable two way radio TDMA direct mode operation means the direct mode operation of time division multiple access of DMR digital two way radio and in t...

Page 28: ...A 510T UHF Ver1 0 28 53 Value range 0 65535 Default 0 Note when the encryption function is not ticked this item is invalid ...

Page 29: ... low loss cable 3 Digital voltmeter 1 Voltage range approximate FS 18V 2 Input impedance 1MΩ or even bigger 4 Oscilloscope 1 Measuring range DC to 30MHZ 2 High accuracy measurement can be provided from 5 to 25MHz 5 Spectrum analyzer Measurement range DC to 1GHz or even bigger 6 Dummy load 16Ω 3W or even bigger 7 General purpose tester 8920A 8921A 8920B Chart 1 Adjustment Frequency List Frequency U...

Page 30: ...ram to radio Note After adjustment reform the loaded backup channel data 7 2 Debugging introduction Chart 3 TX part measurement regulation item condition Test equipmen t Termi nal Component Method specification 1 low power modulation BAT1 terminal low power banning transmission 5 8V digital voltage meter antenna terminal J2 port A 510T programming software low power adjustment enter low power adju...

Page 31: ...gh power 4 5W 0 2W current below 1 7A 4 low power adjustment debugging channel CH 0 1 2 3 4 BATT end 7 5V power meter ampere meter antenna terminal A 510T programming software low power 4 3 2 1 0 frequency point adjustment enter power adjustment enable PTT adjust data change power current after debugging click confirmation to save debugging data Low power 1W 0 2W Current below 1A 5 VOX adjustment ...

Page 32: ...row band adjustment Adjust channel CH 0 1 2 3 4 AG 1KHz 120mv frequency deviation filter LPF 15KHz HPF 50KHz power meter frequency deviation meter oscilloscope Audio generator Antenna Termina l J4 Mic socket A 510T programming software audio frequency deviation narrow band 4 3 2 1 0 adjustment Enter audio frequency deviation adjustment After Changing sub audio deviation adjustment click confirmati...

Page 33: ...requency deviation after debugging click confirmation to save debugging data QT frequency deviation 350Hz 50Hz 10 DQT broadband frequency deviation adjustment 023N A 510T programming software DQT broadband 4 3 2 1 0 frequency point DQT frequency deviation 750Hz 100Hz 11 DQT narrow band frequency deviation adjustment 023N debug channel CH 0 1 2 3 4 frequency deviation filter LPF 3KHz HPF 20Hz power...

Page 34: ...t test channel CH 2 1 级 SSG 125dBm 5 级 SSG 121dBm 9 级 SSG 117dBm MOD 1KHz DEV 1 5KHz signal generator audio voltage meter distortion tester sinad meter LPF 15KHz HPF 50Hz Antenn a Termin al J2 Earpho ne socket A 510T programming software 1 5 9 level SQ open 2 frequency point narrow band adjustment enter SQ open speaker adjustment enable automatic data adjustment change squelch open speaker after d...

Page 35: ...sitivity 12dB SINAD 25K 121dBm 12 5K 119dBm SNR 25K 45 dB 12 5K 40 dB Adjacent Channel Selectivity 25K 65 dB 12 5K 60 dB Intermediation Disturbance Rejection 25K 60 dB 12 5K 55 dB Spurious Response 65 dB Audio Output Power 1000 mW Digital Sensitivity 5 BER 0 3μV Audio Distortion 5 Frequency Stability 2 5ppm stand by Time 60Hours 1600mAh TX Specifications RF Power H 4 W L 1 5 W Modulation 25K 16KΦF...

Page 36: ...ncy Range UHF 400 470MHz Rf Power Output H 4 W L 1 5 W Channel Numbers 16 CH Working Voltage 7 5V VDC 0 1 Working Temperature Range 25 到 60 22 to 140 Size L W H 104 5mm 52mm 28 mm Weight 232g Machine with Battery and Antenna Battery Li ion DC 7 4V 1600mAh ...

Page 37: ...07270R 3 R10 R71 R72 8 151 13312211 010 SMD carbon resistor 330R 5 0402 YAGEO RC0402JR 07330R 4 R38 R80 R104 R343 9 151 13912211 010 SMD carbon resistor 390R 5 0402 YAGEO RC0402JR 07390R 1 R36 10 151 14712211 010 SMD carbon resistor 470R 5 0402 YAGEO RC0402JR 07470R 4 R59 R312 R319 R330 11 151 16812211 010 SMD carbon resistor 680R 5 0402 YAGEO RC0402JR 07680R 1 R39 12 151 18212211 010 SMD carbon r...

Page 38: ...72 R380 27 151 12732211 010 SMD carbon resistor 27K 5 0402 YAGEO RC0402JR 0727K 2 R96 R325 28 151 13032211 010 SMD carbon resistor 30K 5 0402 YAGEO RC0402JR 0730K 2 R25 R307 29 151 13332211 010 SMD carbon resistor 33K 5 0402 YAGEO RC0402JR 0733K 3 R44 R45 R316 30 151 14732211 010 SMD carbon resistor 47K 5 0402 YAGEO RC0402JR 0747K 12 R28 R29 R83 R313 R314 R352 R360 R361 R362 R363 R398 R402 31 151 ...

Page 39: ...ata GRM1555C1H470J 4 C11 C26 C309 C380 47 081 15606251 040 SMD ceramic capacitors COG 56P 5 0402 50V muRata GRM1555C1H560J 1 C83 48 081 18206251 040 SMD ceramic capacitors COG 82P 5 0402 50V murata GRM1555C1H820J 2 C105 C124 49 081 11016251 040 SMD ceramic capacitors COG 100P 5 0402 50V murata GRM1555C1H101J 8 C46 C56 C65 C67 C320 C327 C376 C434 50 081 12216251 040 SMD ceramic capacitors COG 220P ...

Page 40: ... C442 C446 C449 60 081 91057221 040 SMD ceramic capacitors X5R 1uF 10 0402 10V muRata GRM155R61A105K 15 C12 C66 C158 C300 C314 C321 C336 C341 C347 C413 C417 C418 C422 C431 C448 61 081 10201351 040 SMD ceramic capacitors COG 2P 0 1pF 0603 50V murata GRM1885C1H2R0B 1 C131 62 081 124A1351 040 SMD ceramic capacitors COG 2P4 0 1pF 0603 50V murata GRM1885C1H2R4B 1 C132 63 081 10301351 040 SMD ceramic ca...

Page 41: ...pacitors X7R 10uF 10 1206 16V maRata GRM31CR71C106K 1 C344 79 081 92267521 040 SMD ceramic capacitors X5R 22uF 10 1206 10V muRata GRM31CR61A226K 2 C313 C335 80 081 94768521 040 SMD ceramic capacitors X5R 47uF 20 1206 10V muRata GRM31CR61A476ME15L 1 C330 81 101 1072B401 010 Tantalum capacitor 100uF 10V 20 B 3528 21 AVX 1 C311 82 231 06042201 010 Chip Bead 6A 0805 22R murata BLM21PG220SN1D 5 L7 L8 L...

Page 42: ...diode Pin switch BAP65 03 SOD 323 URP NXP 1 D1 101 021 L4148121 120 diode switch LL4148 LL 34 ST 1 D302 102 031 C3356103 040 audion NPN SMD 2SC3356 T1B A R25 SOT 346 SC 59 RENESAS 1 Q8 103 031 C5108122 080 Audion NPN SMD 2SC5108 SOT 523 SC 75 TOSHIBA 1 Q10 104 032 114YE122 050 Audion PNP SMD DTA114YETL SOT 416 EMT3 ROHM 1 Q304 105 031 114EE122 050 Audion NPN SMD DTC114EETL SOT 416 EMT3 ROHM 7 Q9 Q...

Page 43: ...00 123 013 C512C194 020 EEPROM storageIC AT24C512C SSHM T 8 lead JEDEC SOIC ATMEL 1 U318 124 014 15050115 250 IC Speech WTV080 20SS WTC150507 41 ROM SSOP20 1 U316 125 012 6228D191 190 IC 1 2V stabilivolt XC6228D122VR G SOT 25 TOREX 1 U309 126 01Y C1G04193 54 0 IC logical SN74LVC1G04DBVR SOT 23 TEXAS INSTRUMENTS 1 U304 127 014 C3204177 540 IC audio TLV320AIC3204IRHBR QFN32 TEXAS INSTRUMENTS 1 U301 ...

Page 44: ...N_P V1 01 76 exe 963 00A51T10172 3 V1 01 72 C 0B5C3D 42H A 51 T _CN_C V1 01 72 exe Prog ram ming softw are 963 00A51T10172 4 V1 01 72 C BB4164 01H A 51 T _EN_C V1 01 72 exe Welding afterward components 1 801 A510TD07 00 1 PCBA A 510T D07 1 2 432 03BA0101 010 microswitch 7 4 7 3 4 3mm SKHLLBA010 ALPS 1 57N 3 K1 K2 K3 3 391 26036421 010 Microphone with feet COB636P 2042 00 AA D6 3 6mm 42dB 2 0V 1 M1...

Page 45: ...0001 012 positive and negative support A 510 PC brass Black 1 rubber articles 1 542 0A510001 011 function keys A 510 silica gel 60 Black 1 2 543 0A510001 012 The alarm button A 510 silica gel 60 orange 1 3 547 0A510001 021 The host waterproof circle A 510 silica gel 40 Black 1 On the aluminum housing 4 546 0A510001 013 Ear cover A 51series silica gel 40 Black 1 5 545 0A510001 012 positive negative...

Page 46: ...ross recess carbon steel nickeling 2 Antenna base screw 8 662 P0025060 302 Mechanical tooth half screw PM2 5 6 cross recess stainless steel nickeling 2 Housing and aluminum housing fastening screw 9 661 P0020035 301 Self taping screw PBH2 0 3 5 T6 wintersweet slot white nickel plating 8 Fix PCB all the model is available 10 662 P0014030 101 Mechanical tooth screw PM1 4 3 cross recess carbon steel ...

Page 47: ... xiaoyinlong 22 5mm circle corner 1 747 00A51001 011 Serial number A 510 PET White on Black Domestic 6 747 00A51003 011 Serial number English A 510 PET 26 5 9 4 0 1mm White on Black 2 Oversea 7 74B 000ALL01 011 QC PASS tag ALL 13 5 9 3mm Black on gold English 1 Accessory material 1 FL2 A001 703 sealant white 1 07mL p cs Used for speaker earphone cover ...

Page 48: ...A 510T UHF Ver1 0 48 53 Diagram 1 A 510T Tag Number Diagram TOP ...

Page 49: ...A 510T UHF Ver1 0 49 53 BOT ...

Page 50: ...O 31 VDDIO 30 VDDIO 26 VDDIO 22 HPIDATA0 57 VDDIO 8 VDDIO 1 HPIDATA1 56 HPIDATA2 55 HPIDATA3 54 HPIDATA4 53 HPIDATA5 52 HPIDATA6 51 HPIDATA7 50 VDD2 38 VDD2 33 VDD2 41 VDD2 49 S1CLK 4 S1XFS 3 S1RF S 5 S1DO 2 PLLDVDD 47 VDD2 7 VDD2 20 VDD2 23 VDD2 29 VDD2 32 S1DI 6 PIO1 17 PIO0 18 C LKOUT 44 C LKIN 46 PIC3 15 PIC2 16 HWRN 62 VSS 65 NC 25 R STN 59 INTO 64 PLLBYPS 45 PLLSEL2 48 HIM I 58 HOB IB 60 HCS...

Page 51: ...C11 9 5P 4 1 2 3 5 Q 7 UMC4 N DC7V5 C26 47 P C25 47 nF C29 10 0n F CN2 00 A NT R10 1 5K 6 C54 10 0n F C55 10 nF R98 6K 8 D S Q 6 A T3 201 1 L1 2 10 0NH C56 10 0P R10 4 33 0R C53 10 00 P 5R C60 NC L1 3 18 NH L1 1 NC L9 0R C62 47 0P R10 0 4K 7 C52 2P C58 20 P C61 3P D6 HSC27 7 L1 0 0 4 1 6 4T D5 HSC27 7 C59 4P C57 NC L1 5 NC R10 3 NC R99 0R R10 2 NC R97 0R L1 6 B L60 1 APC RF IN C12 1 22 nF R19 47 R...

Page 52: ...face Bus Q9 DTC114TE SW D2 NC RF O UT RF IN K 3 S4 VOICE_BUSY U313 LM 2734XM K Vcc 7 5V DC DC U309 U310 XC6219B332 XC6219B332 5V A3V3 REG REG RF 3V3 APC CT DCSS DECODE BATT DET Programming FC CTC M OD RXC TXC AF_MODE K1 MIC Mute K2 K3 TX LED RX LED PTT CP U3V3 AF out TH 1 BEEP CP U3V3 EEP RO M U318 24C512 VO X SCT3258TD IP data port U302 AMBE 3000 Encoder Decoder AD DA switch Frame Encoding Frame ...

Page 53: ...A 510T UHF Ver1 0 53 53 Diagram 4 A 510T Packaging ...

Reviews:

No comments

Related manuals for A-510T

Brand: Icom Pages: 63

Brand: Icom Pages: 7

Brand: Icom Pages: 53

Brand: Icom Pages: 2

Brand: Icom Pages: 25

IC-F3160 SERIES

Brand: Icom Pages: 14

Brand: Icom Pages: 2

Brand: Ferguson Pages: 21

22 Ch GMRS/FRS Two-way Radios

Brand: Radio Shack Pages: 28

EDDINGTON EDD-DAB-BLK

Brand: MAJORITY Pages: 26

Brand: Topcom Pages: 4

Brand: kchibo Pages: 2

Brand: BRONDI Pages: 48

microTalk CXR800

Brand: Cobra Pages: 17

Brand: Curtis Pages: 3

Brand: Hitachi Pages: 12

Brand: Hitachi Pages: 20

Brand: Hitachi Pages: 20

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands