Huawei HIKEY960 User Manual

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HiKey960 Development Board Hardware User Manual
HiKey960 Development Board Hardware User Manual
Version 1.0
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HiKey960 Development Board Hardware User Manual
Table of Contents
Table of Contents ....................................................................................................................................... 2
Introduction ................................................................................................................................................ 3
What’s in the Box ....................................................................................................................................... 4
Board Overview.......................................................................................................................................... 5
Key Components ........................................................................................................................................ 6
System Block Diagram ............................................................................................................................... 7
Getting Started ............................................................................................................................................ 8
Prerequisites ........................................................................................................................................... 8
Starting the board for the first time ........................................................................................................ 8
Component Details ..................................................................................................................................... 9
Processor ................................................................................................................................................ 9
PMIC ...................................................................................................................................................... 9
Memory (DRAM) .................................................................................................................................. 9
Storage ................................................................................................................................................... 9
Micro SDHC .......................................................................................................................................... 9
Boot ROM .............................................................................................................................................. 9
Networking ............................................................................................................................................. 9
WiFi ....................................................................................................................................................... 9
Display Interface .................................................................................................................................... 9
Camera Interface .................................................................................................................................. 10
USB Ports ............................................................................................................................................. 10
Audio .................................................................................................................................................... 11
DC Power ............................................................................................................................................. 11
Power Measurement ............................................................................................................................. 11
External Fan Connection ...................................................................................................................... 11
UART ................................................................................................................................................... 11
Buttons ................................................................................................................................................. 11
LED Indicators ..................................................................................................................................... 11
Additional Functionality ...................................................................................................................... 12
Expansion Connectors .............................................................................................................................. 13
Low Speed Expansion Connector ........................................................................................................ 13
High Speed Expansion Connector ........................................................................................................ 14
Power Management Overview ................................................................................................................. 17
Block Diagram ..................................................................................................................................... 17
DC Power Input ................................................................................................................................... 17
Power-on Sequence .............................................................................................................................. 17
Voltage Rails ........................................................................................................................................ 18
Mechanical specification ......................................................................................................
.................... 20
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HiKey960 Development Board Hardware User Manual
Introduction
The HiKey960 Development Board is a 96Boards compliant community board based on Hisilicon Kirin960 SoC. The following table lists its key features:
Processor
Memory/ Storage
Wireless
USB
Display
Video
Audio HDMI output
Kirin 960 SoC 4x Cortex-A73 @ 2.4GHz 4x Cortex-A53 @ 1.8GHz ARM Mali-G71 MP8 900MHz 32GB UFS flash storage MicroSD card slot PCIE Gen2 on M.2 Key connector WiFi (2.4- and 5-GHz dual band with two antennas)( DFS band not support)
Bluetooh not support 2 x USB 3.0 type A (host mode only)
1 x USB 2.0 type C OTG 1 x HDMI 1.4 (Type A - full) 1 x 4L-MIPI DSI HDMI output up to FHD 1080P Inside Encoder:H.265/H.264 3840*2400@30fps 4 * 1080p @ 30 fps Inside Decoder: H.265,HEVC MP/High Tier, Main 10/High Tier,H.264BP/MP/HP, MPEG1/2/4, VC-1, VP6/8
Camera
Expansion Interface
LED
Button
Power Source
OS Support AOSP/LINUX Appearance
characteristic
1 x 4-lane MIPI CSI 1 x 2-lane MIPI CSI 40 pin low speed expansion connector: +1.8V, +5V, DC power,GND,2UART, 2I2C, SPI, I2S, 12*GPIO60 pin high speed e xpansion connector: 4L-MIPI DSI, I2C x2, SPI (48M),USB 2.0, 2L+4LM IPI CSI 1 x WiFi activity LED(Yellow) 1 x Activity LED (Blue) 4 x User LEDs (Green)
Power Button Button Power on/off & Reset the system
Recommend a 12V@2A adapter with a DC plug which has a 4.75mm outerb diameter and 1.7mm center pin with standard center-positive (EIAJ-3Compliant)
85mm x 55mm
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HiKey960 Development Board Hardware User Manual
What’s in the Box
The box contains one HiKey960 Development Board and a quick start guide.
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HiKey960 Development Board Hardware User Manual
Board Overview
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HiKey960 Development Board Hardware User Manual
Key Components
Position Reference Description 1 J2002 Low Speed Expansion Connector 2 P401 DC Input 8-18V 3 U1601 UFS 32GB 4 U501 Kirin960 & 3GB LPDDR4 5 U2101 WLAN 6 P2301 Micro SD Card Socket 7 J2001 High Speed Connector 8 J1901 HDMI Type A Port 9 J1701 USB Type C Connector 10 J1801 USB3.0 Host2 Connector 11 J1702 USB3.0 Host1 Connector 12 J2501 PCI-E 13 SW2201
Auto Power Boot SEL
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System Block Diagram
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HiKey960 Development Board Hardware User Manual
Getting Started
Prerequisites
Before you power up your HiKey960 Development Board for the first time you will need the following:
 HiKey960 Development Board.  A 96Boards compliant power supply (sold separately ).  A HDMI or DVI LCD Monitor that supports a resolution of 1080P/60Hz.  HDMI-HDMI cable or HDMI-DVI cable to connect the board to the Monitor.  A computer keyboard with USB interface.  A computer mouse with USB interface.
Starting the board for the first time
To start the board, follow these simple steps: step1. Connect the HiKey960 to your display with the HDMI cable. It is important to do this fir st becausethe monitor will not detect the board if it is connected after starting. Ensure that the source for the displayis switched to the HDMI port you are using. step2. Connect the Express-UartBoard.
step3. Ensure Auto Power is ON.
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HiKey960 Development Board Hardware User Manual
Component Details
Processor
4 ARM Cortex-A73 MPCore(Big Core 4 2.4G Hz) 4 A53 MPCore(Little Core 1.8G) ARM Mali G71 MP8 3DGPU
PMIC
There are a master PMIC and two slave PMIC for Kirin960 platform. Master PMIC is a power management system chip. One of the slave PMIC is a 4-phase high efficiency buck converter which applied to offer the power of CPU-B, and the other one is used for GPU&CPU-L.
Memory (DRAM)
The Hikey960 Development Board provides 3GB LPDDR4-SDRAM which is a 4-channel and 64bit width bus implementation interfacing directly to the Kirin960 build-in LPDDR controller. The maximum DDR clock is 1866MHz. It is mounted over the Kirin960 using pop technology.
Storage
The Hikey960 Development Board provides an 32GB UFS which is compliant with UFS2.0.
Micro SDHC
The Hikey960 Development Board SD slot signals are routed directly to the Kirin960 SDC interface. It meets the SD3.0 standard.
Boot ROM
The Hikey960 Development Board boots up from the UFS.
Networking WiFi
  Dual-band (2.4/5GHz) single stream 802.11 a/b/g/n RF.   20- and 40-MHz SISO and 20-MHz 2 × 2 MIMO at 2.4 GHz for High Throughput: 80 Mbps(TCP), 100 Mbps (UDP).   2.4-GHz MRC Support for Extended Range and 5-GHz Diversity Capable.
Display Interface
HDMI
The 96Boards specification calls for an HDMI port to be present on the board. The Kirin960 doesn’t
include a built-in HDMI interface.
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HiKey960 Development Board Hardware User Manual
The Hikey960 Development Board deploys the built-in DSI interface as the source for the HDMI output. A peripheral Bridge IC (U1901, ADV7535) performs this task and it supports 1080p at 30H z.
MIPI-DSI The 96Boards specification calls for a MIPI-DSI implementation via the High Speed Expansion
Connector. The Hikey960 Development Board implements a 4-lane MIPIDSI interface meeting this requirement. It
can support up to 2560*1600@60fps. The Hikey960 Development Bo ard routes the MIPIDSI interface signals to the DSI-0 interface of the Kirin960.
Camera Interface
The 96Boards specification calls for two camera interfaces. The Hikey960 Development Board supports two camera interfaces, one with a 4-lane MIPICSI interface
and one with 2-lane MIPICSI interface, meeting this requirement. The 4-lane MIPICSI interface can support 26M camera and the 2-lane MIPICSI can support 8M camera.
USB Ports
The Hikey960 Development Board supports a USB OTG port and three USB host ports via a USB MUX. The input channel( D+/D-) of USB MUX is connected to the usb port of the SOC, and the two output channels(1D+/1D-,2D+/2D-) are connected to type C USB port and USB hub respectively. The three USB host ports are connected to the downstream ports of the USB hub. The control of MUX is done via a software controlled GPIO. When this signal is logic low, ‘0’, the USB data lines are routed to the type C USB connector. When ‘USB SWSEL’ is logic level high, ‘1’, the USB data lines are routed to USB HUB.
USB Host ports
The Hikey960 Development Board supports three USB host port via a USB hub (U1803 USB5734). Its upstream signal is connected to USB interface of Kirin960.  Port 1 of the USB HUB is routed to J1702, a Type ‘A’ USB Host connector. A current controller (U1704) sets the Power Current limit to 1A.  Port 2 of the USB HUB is routed to J1801, a Type ‘A’ USB Host connector. A current limited controller (U1806) sets the Power Current limit to 1A.  Port 3 of the USB HUB is routed to the High Speed Expansion connector. No current limited controller is implemented on the board for this channel.
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HiKey960 Development Board Hardware User Manual
USB OTG ports
The Hikey960 Development Board implements a OTG port. The port is located at J1701, a type C USB. Note: the board can work in one mode at a time, Host mode or Device mode, not both.
Audio
The Hikey960 Development Board has two audio ports: HDMI and I2S.
DC Power
The Hikey960 Development Board can be powered as follow: 8V to 18V supply from a dedicated DC jack(P401)
Power Measurement
The Hikey960 Development Board has three current sense resistors R401/R413/R408.
Reference Net Description R401 DCIN To measure the current of total base board power R413 SYS5V To measure the current of SYS_5V power R408 VCC4V2 To measure the current of VDD4V2 power
External Fan Connection
The 96Boards specification calls for support for an external fan. That can be achieved by using the 5V orthe SYS_DCIN (12V), both present on the Low Speed Expansion connector.
UART
The Hikey960 Development Board has two UART port s (UAR T6 / UART3), both present on the Low Speed Expansion connector. They are routed to the UART6 (UART1TxD, UART1RxD) and UART3 (UART3TxD, UART3RxD, UART3CTS, UART3RTS) interface of Kirin960 separately. The UART6 isused for the serial console output.
Buttons
The Hikey960 Development Board presents one button. It is Power key which also can be used as Resetkey. The power ON/OFF and RESET signals are also routed to the Low Speed Expansion connector.
Power Button
The push-button S2201 serves as the power-on/sleep button. Upon applying power to the board, press thepower button the board will boot up. Once the board is running you can turn power-off by pressing thepower button for more than 3 seconds. If the board is in a sleep mode, pressing the power bottom willwake up the board. Oppositely, if the board is in an active mode, pressing the power bottom will changethe board into sleep mode.
Reset Button
The push-button S2201 also serves as the hardware reset button. press the button for more than 10 seconds,the system will be rebooted.
LED Indicators
The MediaTek X20 Professional Board has six LEDs.
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Two activity LEDs:
WiFi activity LED –The Hikey960 Development Board drives this Yellow LED via GPIO205
fromKirin960.
Activity LED –The Hikey960 Development Board drives this Blue LED via GPIO207
fromKirin960.
Four User LEDs:
The four user LEDs are surface mount Green in 0603 size located next to the USB type A connector. TheHikey960 Development Board drives the four LEDs from the soc GPIO: GPIO150, GPIO151 GPIO189and GPIO190.
Additional Functionality
The Hikey960 Development Board also has a additional interface for user debugging. It includes JTAG interface. The position is reserved, but the component is not mounted in the mass production.
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HiKey960 Development Board Hardware User Manual
Expansion Connectors
Low Speed Expansion Connector
The following tables show the Low Speed Expansion Connector pin out:
HiKey960 Signals 96Boards Signals PIN PIN 96Boards Signals HiKey960 Signals GND GND 1 2 GND GND UART3CTSN UART0CTS 3 4 PWRBTNN PWRONN UART3TXD UART0TxD 5 6 RSTBTNN EXPRSTOUTN UART3RXD UART0RxD 7 8 SPI0SCLK SPI1CLK UART3RTSN UART0RTS 9 10 SPI0DIN SPI1DI UART5TXD UART1TxD 11 12 SPI0CS SPI1CSN UART5RXD UART1RxD 13 14 SPI0DOUT SPI1DO I2C0SCL I2C0SCL 15 16 PCMFS CODECSSIDATA I2C0SDA I2C0SDA 17 18 PCMCLK SLIMBUSCLK I2C7SCL I2C1SCL 19 20 PCMDO SLIMBUSDATA I2C7SDA I2C1SDA 21 22 PCMDI GPIO045CODECRST GPIO215 GPIO-A 23 24 GPIO-B GPIO216 GPIO217 GPIO-C 25 26 GPIO-D GPIO218 GPIO220 GPIO-E 27 28 GPIO-F LCDBLPWM LCDTE0 GPIO-G 29 30 GPIO-H GPIO040LCDRSTN GPIO052CAM0RSTN GPIO-I 31 32 GPIO-J CAMPDN0 GPIO075CAM1RSTN GPIO-K 33 34 GPIO-L CAMPDN1 VOUT111V8/2V95 +1V8 35 36 SYSDCIN SYSDCIN SYS_5V +5V 37 38 SYCDCIN SYSDCIN GND GND 39 40 GND GND
UART {3/6}
The 96Boards specifications calls for a 4-wire UART implementation, UART0 and an optimal second 2-wire UART, UART1 on the Low Speed Expansion Connector.The HiKey960 Development Board implements UART3 as a 4-wire UART that connects directly to theMT6797 SoC. These signals are driven at 1.8V.The HiKey960 Development Board implements UART6 as a 2-wire UART that connects directly to theMT6797 SoC. These signals are driven at 1.8V.
I2C {0/1}
The 96Boards specification calls for two I2C interfaces to be implemented on the Low Speed Expansion Connector. The HiKey960 Development Board implements both interfaces named I2C0 and I2C7. They connect directly to the Kirin960 SoC. Each of the I2C lines is pulled up to VIO18_PMU via 1K resistor.
GPIO {A-L}
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The 96Boards specification calls for 12 GPIO lines to be implemented on the Low Speed Expansion Connector. Some of these GPIOs may support alternate functions for DSI/CSI controlThe HiKey960 Board implements this requirement. All GPIOs are routed to the Kirin960 SoC. Take LowSpeed Expansion Connector for reference.
SPI 0
The 96Boards specification calls for one SPI bus master to be provided on the Low Speed Expansion Connector. The HiKey960 Development Board implements a full SPI master with 4 wires, CLK, CS, MOSI and MISO. The signals are connected directly to the Kirin960 SoC and driven at 1.8V.
I2S
The 96Boards specification calls for one PCM/I2S bus to be provided on the Low Speed Expan sion Connector. The CLK, FS and DO signals are required while the DI is optional. The HiKey960 Development Board implements a I2S interface with 4 wires, CLK, FS, DO and DI. The signals are connected directly to the Kirin960 SoC and driven at 1.8V.
Power and Reset
The 96Boards specification calls for a signal on the Low Speed Expansion Connector that can power on/off the board and a signal that serves as a board reset signal. The HiKey960 Development Board routes the PWRBTNN (named PWRKEY on schematic) signal to thePWRKEY pin of the PMIC. This signal is driven by s2201 as well, the on-board power on push-buttonswitch. A mezzanine implementation of this signals should not drive it with any voltage, the only allowedoperation is to force it to GND to start the board from a sleep mode. The HiKey960 Development Board routes the RSTBTNN (nam ed exp_rstoutn on schematic) signal to the HRESETN pin of the PMIC Hi6421.
Power Supplies
The 96Boards specification calls for three power rails to be present on the Low Speed Expansion Connector:
  +1.8V Max of 100mA   +5V Provide a minimum of 5W of p ower (1A).   SYS_DCIN 8-18V input with enough current to support all the board functions or the output
DCIN from on-board DC Connector able to provide a minimum of 7W of power.
The HiKey960 Development Board supports these requirements as follows:
  +1.8V Driven by PMIC up to 150mA.    +5V Driven by a 5A DC-DC buck converter (U403). It also provides the VBUS power to
the twoUSB host connectors (J1702, J1801) and the HDMI 5V power to the HDMI connector (J1901).Theremaining capacity provides a total of 7W which meets the 96Boards requirements.
High Speed Expansion Connector
There is a 60-pin High Speed Expansion Connector on board. As shown in the table below.
HiKey960 Signals 96Boards Signals PIN PIN HiKey960 Signals 96Boards Signals
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GPIO148SPI3DO SDDAT0/SPI1DOUT 1 2 CSI0C+ CSI0CLKP UART0IRDARXD SDDAT1 3 4 CSI0C- CSI0CLKN UART0IRDATXD SDDAT2 5 6 GND GND
GPIO149SPI3CS0N SDDAT3/SPI1CS 7 8 CSI0D0+ CSI0DATA0P
GPIO146SPI3CLK SDSCLK/SPI1SCLK 9 10 CSI0D0- CSI0DATA0N
GPIO147SPI3DI SDCMD/SPI1DIN 11 12 GND GND
GND GND 13 14 CSI0D1+ CSI0DATA1P
ISPCCLK0MCAM CLK0/CSI0MCLK 15 16 CCSI0D1- CSI0DATA1N
ISPCCLK1SCAM CLK1/CSI1MCLK 17 18 GND GND
GND GND 19 20 CSI0D2+ CSI0DATA2P
DSI2CLKP DSICLK+ 21 22 CSI0D2- CSI0DATA2N
DSI2CLKN DSICLK- 23 24 GND GND
GND GND 25 26 CSI0D3+ CSI0DATA3P
DSI2DATA0P DSID0+ 27 28 CSI0D3- CSI0DATA3N
DSI2DATA0N DSID0- 29 30 GND GND
GND GND 31 32 I2C2SCL ISPSCL0
DSI2DATA1P DSID1+ 33 34 I2C2SCL ISPSDA0
DSI2DATA1N DSID1- 35 36 I2C3SDA ISPSCL1
GND GND 37 38 I2C3SDA ISPSDA1
DSI2DATA2P DSID2+ 39 40 GND GND
DSI2DATA2N DSID2- 41 42 CSI1D0+ CSI1DATA0P
GND GND 43 44 CSI1D0- CSI1DATA0N
DSI2DATA3P DSID3+ 45 46 GND GND
DSI2DATA3N DSID3- 47 48 CSI1D1+ CSI1DATA1P
GND GND 49 50 CSI1D1- CSI1DATA1N
USB2DNDP4CON USBD+ 51 52 GND GND
USB2DNDM4CON USBD- 53 54 CSI1C+ CSI1CLKP
GND GND 55 56 CSI1C- CSI1CLKN
NC HSICSTR 57 58 GND GND NC HSICDATA 59 60 RESERVED Pull-up vout21v8
MIPI DSI {0}
The 96Boards specification calls for a MIPI-DSI to be present on the High Speed Expansion Connector. A minimum of one lane is required and up to four lanes can be accommodated on the connector. The Hikey960 Development Board implementation supports a full four lane (1.2Gbps/lane) MIPI-DSI interface that is routed to the High Speed Expansion Connector. The MIPI-DSI signals are directly connected to DSI-0 of Kirin960.
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HiKey960 Development Board Hardware User Manual
MIPI CSI {0/1}
The 96Boards specification calls for two MIPI-CSI interfaces to be present on the High Speed ExpansionConnector. Both interfaces are optional. CSI0 interface can be up to four lanes while CSI1 is up to twolanes. The Hikey960 Development Board impl ementation supports a full four lane MIPI-CSI interface on CSI0 and two lanes of MIPI-CSI on CSI1. All MIPI-CSI signals are routed directly to/from the Kirin960 SoC. CSI0 can support up to 26M@30fps and CSI1 can support up to 8M@30fps. The max data rate of each lane is 2.5Gbps.
I2C {2/3}
The 96Boards specification calls for two I2C interfaces to be present on the High Speed Expansion Connector. Both interfaces are optional unless a MIPI-CSI interface has been implemented. Then an I2C interface shall be implemented. The Hikey960 Development Board implementation supports two MIPI-CSI interfaces and therefore mustsupport two I2C interfaces,they are ISPI2C0 and ISPI2C1. Each of the I2C lines is pulled up to VIO18_PMU via 1K resistor.
SD/SPI
The 96Boards specification calls for an SD interface or a SPI port to be part of the High Speed ExpansionConnector. The Hikey960 Development Board implements a full SPI master with 4 wires (96Boards SPI Configuration), CLK, CS, MOSI and MISO. All the signals are connected directly to the Kirin960 SoC. These signals are driven at 1.8V.
Clocks
The 96Boards specification calls for one or two programmable clock interfaces to be provided on the High Speed Expansion Connector. These clocks may have a secondary function of being CSI0MCLK andCSI1MCLK. If these clocks can’t be supported by the SoC than an alternative GPIO or No-Connect isallowed by the specifications. The Hikey960 Development Board implements two CSI clocks which are connected directly to the Kirin960 SoC. These signals are driv en at 1.8V.
USB
The 96Boards specification calls for a USB Data line interface to be present on the High Speed ExpansionConnector. The Hikey960 Development Board implements this requirement by routing USB channel 4 from the USBHUB to the High Speed Expansion Connector.
HSIC
The 96Boards specification calls for an optional MIPI-HSIC interface to be present on the High Speed Expansion Connector. The Hikey960 Development Board impl ementation doesn’t support this opti onal requirement.
Reserved
The pin 60 of the High Speed Expansion Connector is pulled up to VIO18_PMU via 100K resistor.
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HiKey960 Development Board Hardware User Manual
Voltage Rails
Circuit Type Net Name
Default ON
Voltage(V)
Iout Max
(mA)
Expected use
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HiKey960 Development Board Hardware User Manual
SYS5V 5 5000 system 5V VDD4V2 4.2 5000 system power VDDCPUB 0.8 16000 VDDCPUL 1.05 30000
BUCK
LDO
Other
VDDGPU 0.8 12000 Core power for GPU Vbuck00V8 0.8 2500 core power for PERI Vbuck11V1 1.1 3000 DRAM and LDO Vbuck21V45 1.45 2500 power for LDO Vbuck32V15 2.15 2500 power for LDO LDO0 0.8 300 UFS,sys LDO1 1.29 300 HDMI V1P2 LDO2 1.8 800 1.8V IO LDO3 1.85 300 HDMI LDO5 1.8 500 MIPI phy,DDR phy,HKADC LDO7 1.8 300 ABB,PLL LDO8 1.8 300 sys PLL LDO9 1.8/2.95 150 SD card IO LDO10 3.2 100 USB phy 3.3V LDO11 1.8 150 40 pin connector LDO15 3 600 UFS LDO16 2.95 800 SD card LDO21 1.8 200 efusesys LDO26 1.8 50 19.2M XO LDO29 1.2 200 UFS 1.2V LDO30 0.8 300 UFS 0.8V HDMI5V 5 HDMI output voltage
VBUSHOST1 5
VBUSHOST2 5
VIO18PMU 1.8 1.8V on LS connector SYS5V 5 5V on LS connector
DCIN 8 ~ 18
4Cortex A73 4Cortex A53
USB host1 output voltage(CON6401) USB host2 output voltage(CON6402)
8-18V DCIN on LS connector as output
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HiKey960 Development Board Hardware User Manual
Mechanical specification
The Hikey960 Development Board is compli a nt with the 96boards mechanical specification.
FCC Regulations:
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
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HiKey960 Development Board Hardware User Manual
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/ TV technician for help.
Changes or modifications not expressly approved by the manufacturer could void
the user’s authority to operate the equipment.
FCC RF Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. To comply with FCC RF Exposure compliance requirements, this grant is applicable to only Mobile Configurations. The antennas used for the transmitter must be installed to provide a separation distance of at least 20cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
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