Motorola 89FC5810 Users manual

APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Operational or User’s Manual
The manual should include instruction, installation, operator, or technical manuals with required ‘information to the users’. This manual should include a statement that cautions the user that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. The manual shall include RF Hazard warning statements, if applicable.
The instruction and service manual for this base radio are not published at this time. However, draft copy of some of the manual information has been assembled and has been included as part of this filing package.
Upon request, published and/or printed manuals will be sent to the commission and/or telecommunication certification body (TCB) as soon as they become available. All of the descriptions, block diagrams, and schematics that are included in this filing package are current as of the package submittal date.
EXHIBIT DESCRIPTION
D1-1 Manual Front Matter (Draft) D1-2 Specifications (Draft) D1-3 Field Replaceable Units and Orderable Parts (Draft) D1-4 Tune-Up Procedure D1-5 Racking Configurations D1-6 Functional Description / Operation of Modules and Interconnect (Draft)
EXHIBIT D
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Manual Front Matter (Draft)
EXHIBIT D1-1
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Manual Front Matter (Draft, Continued)
EXHIBIT D1-1
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Manual Front Matter (Draft, Continued)
EXHIBIT D1-1
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Manual Front Matter (Draft, Continued)
EXHIBIT D1-1
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
Spurious and Harmonic Emissions
FCC Designation:
Frequency Range
Type
Power Output
User / Operational Manual
Specifications (Draft)
General Performance
Model T7039 H x W x D 5.25" x 19" x 18" (133x483x457mm) Weight 45 lbs (20 kg) Power Requirements
AC: 90-264 VAC, 47-63 Hz
DC: 43-60 VDC Temperature Range -22 to 140F (-30 to 60C) Input / Output Impedance 50 ohms Antenna Connectors
Transmit: N female
Receive: N female
Modulation
HPD Transmit / Receive: 64QAM, 16QAM, QPSK
IV&D Transmit / Receive: C4FM, LSM
Frequency Stability External Reference Channel Spacing
HPD: 25 kHz
C4FM / LSM: 12.5 kHz
Transmitter
Frequency Range 851-870 MHz Power output
HPD: 2-50 Watts (Average)
C4FM: 2-100 Watts
LSM: 2-100 Watts (Average)
Electronic Bandwidth Full Bandwidth Intermodulation Attenuation 40 dB
Attenuation
85 dB
FCC Type Acceptance
ABZ89FC5810 851-869 MHz Transmitter, HPD Variable 2-50 W
ABZ89FR5811 806-824 MHz Receiver N/A
Transmitter, C4FM/LSM Variable 2-100 W
EXHIBIT D1-2
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Field Replaceable Units and Orderable Parts (Draft)
Field replaceable units, or FRUs, include special packaging to allow shipment to customers. Parts and FRUs available for customer order are listed in this section. All parts and FRUs are sourced through the Radio Products and Service Division (RPSD).
FRU # Description DLN6567A FRU: PA Mid Power 700 / 800 MHz DLN6568A FRU: AC / 48V DC Power Supply DLN6566A FRU: Transceiver 700 / 800 MHz DLN6569A FRU: Site Controller DLN6636A FRU: Expansion HUB DLN1317A External Dual Circulator 700 / 800 MHz DLN6634A FRU:700 / 800 MHz Site LNA DLN1306A FRU: 700 / 800 MHz Cabinet LNA DLN1340A FRU: Receive Multi-Coupler Tray DLN1338A FRU: Fan Module DLN1327A FRU: Power Supply Fan Module DLN1329A FRU: Site Controller Backplane DLN1330A FRU: Base Radio Backplane DLN1331A FRU: AC Junction Panel DLN1332A FRU: Expandable Site Subsystem Backplane DLN1339A FRU: AC Distribution
PARENT ITEM Part Number Description NA TRN7663A Power Cable, North America NA TRN7755A Power Cable, Continental Europe NA TTN5049A Power Cable, UK / Ireland NA TTN5103A Power Cable, Australia Cables All Other X153 TTN5028A Rack Mount Hardware ### Fan Filler Panel ### FRU: Ps Filler Panel ### Diplexer, 700 / 800 MHz ### Transmit Post Filter 700 MHz ### Transmit Post Filter 800 MHz ### Phasing Harness WEB NIR FRU: Base Radio Preselector 700 / 800 MHz ### FRU: Site Preselector 700 / 800 MHz DLN1316A FRU: Duplexer, 700 MHz DLN1315A Duplexer, 800 MHz CLN1790A Dual Circulator Tray CLN1790A TKN8750A Cable Peripherals CLN1790A TKN9133A Cables Peripherals Tray CLN1790A TLF7320A Double Circulator CLN1790A TLF7340A Low Pass Filter CLN1790A TLN3391A Circulator Load CLN1790A TRN7751A Peripheral Shelf
EXHIBIT D1-3
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Tune-Up Procedure
There is no field tune-up procedure. All adjustments are software controlled and are pre-set at the factory. Certain station operating parameters can be changed via man-machine interface (MMI) commands, within predetermined limits. Examples include transmit / receiver operating frequencies and transmitter power level.
EXHIBIT D1-4
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Racking Configurations
There are various equipment racking configurations available to customers. The following section includes sketches which depict many of the racking alternatives.
Configuration Layout
Configuration Layout
Bay #3
Bay #3
Bay #3
Bay #3
PA #5
PA #5
PA #5
PA #5
XCVR #4
XCVR #4
XCVR #4
XCVR #4
XCVR #5
XCVR #5
XCVR #5
XCVR #5
PA #6
PA #6
PA #6
PA #6
SC #2
SC #2
SC #2
SC #2
Fan Module #1 serves PA Bay #1
Fan Module #1 serves PA Bay #1
Fan Module #1 serves PA Bay #1
Fan Module #1 serves PA Bay #1 Fan Module #2 serves PA Bay #2
Fan Module #2 serves PA Bay #2
Fan Module #2 serves PA Bay #2
Fan Module #2 serves PA Bay #2 Fan Module #3 serves PA Bay #3
Fan Module #3 serves PA Bay #3
Fan Module #3 serves PA Bay #3
Fan Module #3 serves PA Bay #3 Fan Module #4 serves XCVR Bay #1
Fan Module #4 serves XCVR Bay #1
Fan Module #4 serves XCVR Bay #1
Fan Module #4 serves XCVR Bay #1 Fan Module #5 serves XCVR Bay #2
Fan Module #5 serves XCVR Bay #2
Fan Module #5 serves XCVR Bay #2
Fan Module #5 serves XCVR Bay #2 Fan Module #6 serves XCVR Bay #3
Fan Module #6 serves XCVR Bay #3
Fan Module #6 serves XCVR Bay #3
Fan Module #6 serves XCVR Bay #3
XCVR #6
XCVR #6
XCVR #6
XCVR #6
PA
PA
PA
PS
PS
PS
PS
PS
PS
PS
PS
Receive Only Base Radio
Receive Only Base Radio
PA
XCVR
XCVR
XCVR
XCVR
Base Radio
Base Radio
XCVR #1
XCVR #1XCVR #1
XCVR #2
XCVR #2XCVR #2
XCVR #2XCVR #2
XCVR #2XCVR #2
Bay #1 Bay #2
Bay #1 Bay #2
Bay #1 Bay #2
Bay #1 Bay #2
PA #3
PA #3
PA #3
PA #2
PA #2
PA #2
PA #2
XCVR #2
XCVR #2
XCVR #2
XCVR #2
PA #3
XCVR #3
XCVR #3
XCVR #3
XCVR #3
PA #1
PA #1
PA #1
PA #1
SC #1
SC #1
SC #1
SC #1
XCVR #1
XCVR #1
XCVR #1
XCVR #1
PA #4
PA #4
PA #4
PA #4
ALARM
ALARM
ALARM
ALARM
PS #1
PS #1
PS #1
PS #1
PS #2
PS #3
PS #3
PS #3
PS #3
PS #4
PS #4
PS #4
PS #4
PS #2
PS #2
PS #2
GTR 8000 Expandable Site Sub-system Layout
GTR 8000 Expandable Site Sub-system Layout
PS #5
PS #5
PS #5
PS #5
PS #6
PS #6
PS #6
PS #6
EXHIBIT D1-5
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) Control Module Overview
The transceiver control circuitry performs the digital signal processing data formatting for the base radio (BR) and provides the external interfaces to the rest of the communication equipment present at the site. The Host Processor is the MPC8250 and the DSP is the MSC8101. General functionality includes:
Data and Control interface to the Receiver chip set devices
Data and Control interface to the Exciter chip set devices
Block Encoder / Decoder Interface
DSP interfaces
DSP / Host interface
Host bus size and speed
Host memory size, speed, and types supported
External ports (ethernet, RS232, etc.)
External physical interfaces (switches, connectors, etc.)
Control Switches
There is one switch on the Front Panel of the XCVR Control Module. The function of this multifunction switch can be seen in the table below. The switch is debounced in hardware for 100 ms for the “less than 1 second” case. When the switch is pressed for greater than 3 seconds a “PreReset” signal is sent to the Host processor via the CPLDs IRQ1x signal followed by the actual reset command 1 second later.
Switch Functions
Switch Function
Switch1 Pressed for less than 1 second (See note) Switch1 ­Pressed for greater than 3 seconds
(Application Specific) When this switch closure conditions are met, the Host CPLD/FPGA will generate an interrupt on IRQ2x XCVR Control Module Reset When these switch closure conditions are met the Host CPLD/FPGA will generate a Pre-reset signal to the MPC8250 via IRQ1x of the CPLD followed by a HRESET one second later.
Note: This switch function can be SW controlled. The typical usage for this switch is Access Disable, which disables the power amplifier.
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) Front Panel LEDs
The number and color scheme of the LEDs is described in the following table. The Alarm LED (LED0) is placed closest to the outside edge of the front panel. The physical location of the other LEDs are placed in numerical order next to LED0.
Normal LED Operation
LED Color Status Condition
Alarm Red Off Red Same as above
Status Green Off See Service User Interface Spec document for LED7_g Green Off No Power
LED7_r Red Green Flashing
Green Red Spare Constant
LED6_g Green Off No Power LED6_r Red Green Flashing
Red Constant
LED5_g Green Off No Power
Red Green LED5_r Flashing
LED4_g LED4_r
LED3_g LED3_r
LED2_g LED2_r
Green Off No Power Red
Red Green
Red Green
Amber
Green
Amber
Green
Red
Constant
Amber
Green
Flashing
Green
Red
Constant
Amber
Off No Power
Green
Flashing
Green
Red
Constant
Amber
Off No Power
Green
Flashing
Green
Red
Constant
Amber
See Service User Interface Spec document for more info.
more info.
Spare
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
LED Color Status Condition
LED1_g LED1_r
Ethernet Link1 Green Off No link established On Link established,
Ethernet Link2 Green Off No link established On Link established,
Front Panel Ethernet (visual indication on connector)
ON Link established (referenced to front view,
Yellow/ On Link activity (referenced to front view,
Red Green
Green Off No link established
Amber
Off No Power
Green
Flashing
Green
Red
Constant
Amber
Off No Activity Amber
On Link activity
Off No Activity Amber
On
Off No Activity
Link activity
connector tab at top, green LED will be on the left side of the connector)
connector tab at top, green LED will be on the right side of the connector)
Exciter Module Overview
The exciter, in conjunction with the Power Amplifier or PA, provides the transmitter functions for the Base Radio. The exciter, which is a part of ‘transceiver’ RF board, consists of a baseband circuit block, a baseband modulator circuit block, a pre-amplifier circuit block, and a final amplifier circuit block. The transmitter Voltage Controlled Oscillator (VCO) and frequency synthesis circuitry blocks are also part of the exciter. Other functional blocks in the exciter include the various DC voltage regulators which drive the different circuits, the digital decoding circuitry block which interfaces the exciter circuits to the microprocessor in the control section, metering capability, and exciter to receiver loopback capability for diagnostic purposes.
The exciter interconnects to the control module using an 84-pin flex cable connector. There are no user controls or indicators on the exciter.
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) Power Amplifier Module Overview
The power amplifier (PA) module is a forced convection cooled RF power amplifier that operates to the following electrical performance specifications:
- RF Gain: 42 dB
- Input Return Loss: 10 dB
- Max Current Draw: 17.4 Amps
- Rated Average Power Out: 100 Watt
- Rated Peak Power Out: 200 Watt
- Supply Voltage: 29 Volts DC
- Operational Frequency Range: 746 MHz to 870 MHz
The Power Amplifier is comprised of six internal modules. These are described briefly in the following paragraphs.
1. The Core Board provides the following functionality:
- Routes DC to the Converter and Driver Boards
- Routes RF to the Driver Board
- Provides gain and FB power control
- Provides for diagnostic sensors
- Provides for intermediate voltages used by itself and other modules in the PA
- Provides the PA’s digital interface to the rest of the Base Radio
- Provides for cooling measures control
- Provides for control of subordinate modules
2. The Power Converter Board provides the following functionality:
- Provides 29 Volts DC and an intermediate voltage to the Distribution Board
3. The Driver Amplifier Board provides the following functionality:
- Provides the first RF gain stage of the PA
- Provides supporting bias circuits for the Driver Amplifier
4. The Final Amplifier Board provides the following functionality:
- Provides the second RF gain stage of the PA (parallel stage)
- Provides supporting bias circuits for the Final Amplifier
- Provides for RF power splitting
- Provides for RF power combining
- Provides diagnostics
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
5. The Distribution Board provides the following functionality:
- Provides for RF routing from the Driver Amplifier to the Final Amplifier
- Provides for RF routing from the Final Amplifier to the Output Module
- Provides for DC power routing from the Core Board to the Output Module
- Provides for DC power routing from the Power Converter Board to the Final Amplifier
- Provides for Forward and Reverse Power routing from the Output Module to the Core Board
- Provides for feedback power coupling to the Core Board
- Routes module control from the Core Board to the Final Module
- Routes diagnostics from the Final Module to the Core Board
6. The Output Module provides the following functionality:
- Provides output isolation to the PA
- Provides for harmonic attenuation
- Provides for forward and reverse power detection
Power Supply Module Overview
The power supply module operates from either an AC or DC input and provides the DC operating voltages for the other Base Radio modules. These modules are sometimes also referred to as field replaceable units (FRU).
When operating from an AC source (90 to 264 VAC, 47 to 63 Hz), the supply generates two DC output voltages of
28.94 Volts with reference to output ground. The power supply automatically adjusts to AC input ranges and supplies a steady output. In AC mode, the power supply contains a separate battery charger which can be used to maintain the charge on a 48 Volt DC nominal system, positive or negative ground (if installed).
When operating from a DC source (43 VDC to 60 VDC, positive or negative ground), the supply generates two DC output voltages of 28.94 Volts with reference to output ground. The battery charger is not useable when operating from a DC input power source.
When both AC and DC sources are available, the power supply operates from the AC source. When the AC source is lost, the power supply automatically shifts to DC operating mode. When the AC source is restored, the power supply automatically shifts to AC operating mode.
The power supply contains several switching-type power supply circuits, power factor correction circuitry, battery charging circuitry, diagnostics and monitoring circuitry.
The power supply module interconnects to the chassis backplane using a multi-pin power connector. Two Torx screws on the front panel of the power supply module secure it in the chassis.
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) Power Supply Controls and Indicators
The power supply module has three front panel light emitting diode (LED) indicators:
1) ALARM: a RED LED that when illuminated indicates the power supply is no longer operating within its design specifications
2) STATUS: a GREEN LED that when illuminated indicates the power supply is operating within its design specifications
3) FAN: a RED LED that when illuminated indicates the power supply fan is no longer functioning per its design specifications.
The front panel ON/OFF switch is used to enable or disable the DC outputs of the power supply module.
Power Supply Performance Specifications
Operating Temperature: -30 to +60 °C Input Voltage: AC: 90 to 264 Volts AC
DC: 43 to 60 Volts DC Input Frequency Range (AC operation): 47 to 63 Hz Input Current: AC: 10 Amps Maximum
DC: 18A maximum Steady-State Output Voltage:
Main DC Output: 28.94 Volts DC +/- 2.7% Aux DC Output: 28.94 Volts DC +/- 2.7%
Total Output Power Rating: DC Outputs: 600 Watts Battery Charger: 150 Watts
Battery Charger Output Voltage Range: 45 to 58 Volts DC Output Ripple: All outputs 50 mV p-p
(measured with 20 MHz BW oscilloscope at 25°C) Short Circuit Current: 0.5 Amp average (maximum)
Receiver Module Overview
The Receiver, which supports three-branch diversity, provides the receiver functions for the Base Radio. The receiver is a part of the ‘transceiver’ RF board and consists of a front end low noise amplifier section, an on board pre-selector section, an IF filter section, and a baseband converter section. The receiver Voltage Controlled Oscillator (VCO) and frequency synthesis circuitry blocks are also part of the receiver section. A digital decoding section for interface to the control section microprocessor also exists as part of the receiver module.
The receiver interconnects to the control module using an 84-pin flex cable connector. There are no user controls or indicators on the receiver.
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) Additional Information – Control, Reference, Interconnect
The Host
The host microprocessor is a MPC8250A also known as the Power Quad Integrated Communications Controller II (PowerQUICC II). The MPC8250 features 64-bit data and 32-bit address busses providing up to 4 GBytes of address space. The MPC8250 is comprised of a variant of the PowerPC 603e core with Memory Management Units (MMUs), and a Communication Processor Module (CPM). The MPC8250 is in a 480-pin TBGA package to allow easier migration to other PowerQUICC processors.
Control and Communications Features
Microprocessor
266 MHz PowerQuicc II Core 66 MHz External Bus 64-bit (only 32 used) wide 60x Compatible Data Bus, 4 GB Address Space 32-bit wide Local Data Bus, 256 KB Address Space Separate 16-Kbyte data and instruction caches Three User Programmable Machines SDRAM Controller Virtual DMA for memory to memory and memory to I/O transfers 166 MHz Communication Processor Module COP/JTAG Test Access Port Four General Purpose Timers Bus Monitor Software Watchdog Timer Periodic Interval Timer Flexible Interrupt Controller
Main Memory
32 Mbytes of SDRAM, one 32-bits wide bank Option to place an additional 96 MB of SDRAM (for a total of 128 MB) On board SDRAM components 66/133 MHz Device with 9 ns (or faster) Cycle Time No Parity Support
Non-volatile Memory
32 MB Compact Flash Memory Card (Application, 16 bit), which can be easily upgraded to larger densities One 8/16 MB Flash device (Test app., Boot 0, parameter/data storage, 16 bit) On board Flash components
External Interfaces
Serial Peripheral Interface (SPI) Bus One V.24 / RS-232 Serial Port: Synchronous (Front panel) One RS-232 Serial Port, (TXD and RXD only): (Front panel) One RS232 / Ethernet CST Port (Front panel) Three internal 10/100BaseT Ethernet ports
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) Serial Interfaces and I/O
The following table shows the MPC8250’s communication port configuration for the control board. SCC1 will support a synchronous RS232 port. It will also support the same V.24 functionality.
MPC8250 Communication Port Configuration
Port Interface supported
FCC1 10/100BaseT Ethernet FCC2 10/100BaseT Ethernet FCC3 10/100BaseT Ethernet SCC1 Sync. RS232 / V.24 SCC2 Asynch RS232 SCC3 Transparent RX-only for PSM SCC4 Unused SMC1 Unused SMC2 Front panel RS232 MCC1 Unused MCC2 Unused I2C I2C to 1-wire Bridge (to Dallas DS2433 EEPROM) IDMA2 IDMA2 (DSP) IDMA3 IDMA3 (DSP) IDMA4 IDMA4 (Compact Flash) SPI SPI
The control board has 64 MB of total SDRAM in the form of two 32 MB(16Mx16) devices. It supports a total of two separate Flash memory banks, one bank for boot and one for application code. It also supports a CompactFlash memory card. CompactFlash I/O cards are not supported. The Control board supports both Type I and Type II form factor cards.
Reset Configuration
The front panel has one switch. The switch provides two functions, Access Disable and Reset. The Front Panel switch is debounced for 16-32 ms. An Access Disable function will occur if the switch is pressed for less than 1 second but greater than the debounce time. A Reset sequence will occur if the switch is pressed for greater than 3 seconds. The reset sequence will consist of a Pre-Reset signal after 3 seconds followed by the actual reset 1 second later. The Pre-reset signal is used to notify the MPC8250 that an HRESET* is coming and to gracefully shutdown the processor before reset occurs.
The DSP is an industrial temperature StarCore (SC140) based MSC8101. Production parts will operate at the highest core and CPM rates supported at the date of shipment. Initial devices have a maximum core frequency of 275 MHz but will run at 268.8 MHz with CPMs running about half that speed. Core voltages are 1.6 VDC and IO voltages are 3.3 VDC. On chip memory size is 512 KB. The package is a 332 pin FC-PBGA. See the following table for clock mode and frequency information.
DSP Clock Information
Clock Mode 06 DSP Clock Input 67.2 MHz Core Clock 268.8 MHz CPM Clock 134.4 MHz System Bus Clock 67.2 MHz SCC Clock 67.2 MHz Clock Out 67.2 MHz BRG Clock 16.8 MHz default, configurable in SCCR
Station Reference
The station reference clock is 16.8 MHz. This clock is derived from a VCXO and in normal operation is locked to an external reference of 5 MHz, 10 MHz, 20 MHz, or 5 MHz / 1 PPS. The 5MHz_1PPs signal is a 5 MHz signal with an embedded 1 PPS clock. Typically the duty cycle of the clock is 25%. The duty cycle will change to 75%
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
for one period to indicate this is the 1 PPS mark. The external reference sources are the Ext_Ref input, the two CP2 links, and the OCXO which resides on the Supplemental Analog Card (SAC) (future development). The STIC FPGA will automatically or manually (based on the STIC’s memory mapped register configuration) determine what clock will be used as the reference. The same applies to the 1 PPS signals which come from a variety of sources. The 1 PPS sources are the CP2_A, CP2_B, Ext_Ref, and Ext_1PPS. A block diagram of the Station Reference Circuit can be seen in the Figure below.
The 16.8 MHz and external reference clocks will be divided down to 200 kHz internally in the STIC. These resulting signals will be fed into an internal phase detector function block which will measure the phase difference between the two signals. If the rising edge of the 200 kHz clock sourced from 16.8 MHz occurs later than the rising edge of the 200 kHz clock sourced from the external reference, then the Phase_Det_U output of the FPGA will pulse high for the duration of the phase difference. The high pulse on the Phase_Det_U will result in the Charge Pump increasing its output voltage and increasing the VCXO frequency. The same scenario occurs if the 200 kHz clock sourced from 16.8 MHz occurs before the rising edge of the 200 kHz clock sourced from the external reference. In this case the output of the Phase_Det_D pulses high for the duration of the difference. This pulse will result in the Charge Pump decreasing the phase locked loop steering voltage and decreasing the VCXO frequency.
The OCXO can be calibrated by applying a 5 or 10 MHz input signal (preferably a rubidium or equivalent) to the reference BNC on the front panel of the XCVR. The STIC will automatically generate an interrupt (if not masked in SW) to the DSP to indicate the presence of a valid 5 or 10 MHz input signal. The station reference will use this signal to lock the 16.8 MHz VCXO. When locked it will record the steering voltage required to create this lock condition by reading an ADC. Then the OCXO frequency reference will be used to lock the 16.8 MHz VCXO. The VCXO steering voltage required for lock will also be recorded using the same ADC. The two VCXO steering voltages will be compared. If the voltages are different, the OCXO steering voltage will be changed via the DAC. The OCXO steering voltage will be changed until its output frequency creates the same VCXO steering voltage as the VCXO steering voltage recorded when using the 5/10 MHz input reference. The OCXO DAC will reside on the SAC. Data for the OCXO DAC will be placed on the DSP TDM bus TX Slot #8 (Outbound from DSP, Inbound to SAC FGPA). The CST interface can be used to initiate the calibration process and indicate when the calibration is complete. It can also record and timestamp the calibration date(s) and indicate when another calibration is required.
Station Reference Block Diagram
The external references supported are the two 20 MHz clocks from the Site Controller, the external reference, and the OCXO from the SAC board (future development). The STIC will monitor all of these signals and determine which ones are not present or grossly out of tolerance. Each one of these fault conditions can be enabled to create an interrupt to the DSP. The reference clock status can be determined by reading the STIC’s IRQ register and/or the Clock Frequency Status registers. The FPGA can automatically determine which reference should use
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
and automatically select that reference. It also has the option of manually selecting the reference that should be used. The order or priority of the reference clocks are shown below.
External Reference Clock Sources and Frequencies Supported
Reference Source Clock
(clocks shown in accending order
Clock Frequencies
Supported
with highest priority clock first)
CP2 Link1 20 MHz CP2 Link2 20 MHz
External Reference 5 MHz, 10 MHz, 20 MHz, and 5
MHz / 1 PPS
OCXO Reference 10 MHz or 20 MHz
Front Panel 5 MHz or 10 MHz
1 PPS Sources
The table below shows the possible 1 PPS sources and their priority levels. Each source can be manually or automatically selected based on the configuation of the STIC FPGA. While both CP2 links have an imbedded 1PPS signal, the Host CPLD will select which CP2 1 PPS signal gets sent to the FPGA. Thus there is only one CP2 1 PPS signal to the FPGA.
1PPS Sources and Frequencies Supported
Reference Source Clock
(clocks shown in accending order with
highest priority clock first)
CP2 Link (CP2A or CP2B)
(aka Raw_1PPs)
Ext_Ref
(Demodulated 5MHz_1PPS)
External 1PPS
External Interfaces RS-232 Port
This Async port is used to hook up to a dial up modem, MOSCAD, and as the zone link for a Trunking IR system. This port can also be configured for asyncronous operation. This port interfaces to SCC2 of the MPC8250.
Async. RS-232 Port Signals
RJ-45 Pin # RS-232 Signal Type Resource
1 RTS Output PD26 2 DSR/CD Input PC12 3 RxD Input PD28 4 Local_Failsoft* Input PA13 5 GND GND 6 TxD Output PD27 7 DTR Output PC21 8 CTS Input PC13
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft) V.24 Port
This port can be used for either synchronous or asynchronous applications. This RJ45 connector and pinout is the same as used on previous product V.24 boards. This port can also be configured for asyncronous operation. This port interfaces to SCC1 of the MPC8250.
Synchronous V.24 RJ-45 Telco Pin-out (on Xcvr)
RJ-45 Pin
#
1 RCLK Input PC20 2 RX Line Det. Input PC14 3 TCLK Input/Output PC29 4 GND GND 5 RX Data Input PD31 6 TX Data Output PD30 7 CTS Input PC15 8 RTS Output PD29
V.24
Signal
Type Resource
External 1 PPS
The external 1PPS connector currently resides on the Backplane. It is DC coupled, high impedance input, accepts 3.3V DC TTL level signals and is 5 Volt tolerant.
External References
There are two external references (Ext_Ref and 5MHz_In). The Ext_Ref signal resides on the Backplane. It accepts both 5 MHz, 5 MHz / 1 PPS, and 10 MHz references and is DC coupled. The second external reference (5MHz_In) is located on the front panel behind the fan assembly. It has a 50 ohm input resistance and is AC coupled. This input will be used to align the OCXO residing on the SAC.
System Connector
The System connector is a 50-pin Mini SCSI connector. It is used for all the Wildcard general purpose inputs and outputs. It also provides I/O for both MRTI Phone Patch and 6809 Trunking Controller configurations.
Wildcard Connector
Pin # Signal Type Function/Notes
1 Aux In1 (Site Failsoft) Input Customer-defined transistor buffered input (Note1) 2 Aux In2 (TX Inhibit) Input Customer-defined transistor buffered input (Note1) 3 Aux In3 (Rx Inhibit) Input Customer-defined transistor buffered input (Note1) 4 Aux In4 (Duplex Enable) Input Customer-defined transistor buffered input (Note1) 5 Aux In5 (In Cabinet
Repeat) 6 Aux In6 Input Customer-defined transistor buffered input 7 Aux In7 Input Customer-defined transistor buffered input 8 Aux In8 Input Customer-defined transistor buffered input 9 Aux In 9 Opto+
(Ext_PTT)
10 Aux In 9 Opto-
(Ext_PTT)
11 Aux In 10 Opto+ Input Opto-isolated customer defined input 12 Aux In 10 Opto- Input Opto-isolated customer defined input 13 Aux In 11 Opto+ Input Opto-isolated customer defined input 14 Aux In 11 Opto- Input Opto-isolated customer defined input 15 Aux In 12 Opto+ Input Opto-isolated customer defined input 16 Aux In 12 Opto- Input Opto-isolated customer defined input 17 Aux Out1 (Failsoft
Indicate)
Input Customer-defined transistor buffered input (Note1)
Aux In 9
Opto+
(Ext_PTT)
Aux In 9
Opto-
(Ext_PTT)
Output Customer-defined transistor buffered output (Note1)
Opto-isolated customer defined input (Opto A+)
Opto-isolated customer defined input (Opto A-)
Doubles as MRTI PTT and 6809 PTT
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
18 Aux Out2 Output Customer-defined transistor buffered output 19 Aux Out3 Output Customer-defined transistor buffered output 20 Aux Out4 Output Customer-defined transistor buffered output 21 Aux Out5 Output Customer-defined transistor buffered output 22 Aux Out6 Output Customer-defined transistor buffered output 23 Aux Out Relay7
N.O.(RdStat)
24 Aux Out Relay7 Com
(RdStat) 25 Aux Out Relay8 N.O. N.O. contact of Relay A 26 Aux Out Relay8 Com COM contact of Relay A 27 Aux Out Relay9 N.O. N.O. contact of Relay A 28 Aux Out Relay9 Com COM contact of Relay A 29 Aux Out Relay10 N.O. N.O. contact of Relay A 30 Aux Out Relay10 Com COM contact of Relay A 31 GND 32 Aux Out11 Output Customer-defined transistor buffered output 33 Ext_Reset Input External Reset Input (to CPLD) 34 GND 35 GND 36 Mute Monitor In Input 6809 Mute / MRTI Monitor Input 37 CCI / PL Strip In Input 6809 CCI / MRTI PL Strip Input 38 RxAudio Output 6809/MRTI RX Audio output 39 RSTAT/Aux Indicate Out
Detect 40 TSTAT/RXCarrier Detect Output 6809 TDATA / MRTI RX Carrier output 41 Tx Data+ Input 6809 Tdata to AuxTX ADC 42 TX Data -/GND Ground 43 MRTI TxAudio In Input MRTI Transmit Audio (to PCM Codec) 44 Patch Inhibit Out Output MRTI Patch Inhibit output 45 GND 46 GND 47 PL+ Input 48 PL- Input 49 Gen TX+ Input 50 GenTX- Input
N.O. contact of Relay A (Note1) COM contact of Relay A (Note1)
Output 6809 RSTAT / MRTI Aux Indicate output
Transceiver Power / Backplane Connector
This connector provides the interconnect between the XCVR Control and XCVR RF (Exciter and Receiver) board which also incorporates the power supply. This connector consists of the two 10/100 BaseT Ethernet signals, SPI signals for the 28.6 VDC power supply and Power Amplifier, Fan Kit signals, and the CP2 TDM links. All of these signals go to the backplane. This connector also supplies the XCVR Control board with power from the power supply on the XCVR RF board.
XCVR Power/Backplane Interconnect
Pin # Signal Type Function/Notes
1 ETH_TX1+ Output Primary Ethernet Link 2 GND 3 ETH_TX1- Output Primary Ethernet Link 4 GND 5 NC 6 SPARE 7 ETH_RX1+ Input Primary Ethernet Link 8 GND
9 ETH_RX1- Input Primary Ethernet Link 10 GND 11 NC 12 GND 13 SPARE
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
14 GND 15 NC 16 GND 17 PWR_ON_
SEQUENCE 18 GND 19 NC 20 GND 21 ETH_TX2+ Output Redundant Ethernet Link 22 GND 23 ETH_TX2- Output Redundant Ethernet Link 24 GND 25 NC 26 GND 27 12VDC 28 12VDC 29 12VDC 30 12VDC 31 NC 32 GND 33 ETH_RX2+ Output Redundant Ethernet Link 34 GND 35 ETH_RX2- Output Redundant Ethernet Link 36 GND 37 NC 38 SPARE 39 TDM_TX1+ Input Primary TDM Link 40 GND 41 TDM_TX1- Input Primary TDM Link 42 GND 43 NC 44 SPARE 45 TDM_CLK1+ Input Primary TDM Link 46 GND 47 TDM_CLK1- Input Primary TDM Link 48 GND 49 NC 50 SPARE 51 TDM_TX2+ Input Redundant TDM Link 52 GND 53 TDM_TX2- Input Redundant TDM Link 54 GND 55 NC 56 SPARE 57 TDM_CLK2+ Input Redundant TDM Link 58 GND 59 TDM_CLK2- Input Redundant TDM Link 60 GND 61 3.3VDC 62 3.3VDC 63 3.3VDC 64 3.3VDC 65 3.3VDC 66 3.3VDC 67 3.3VDC 68 3.3VDC 69 Wattmeter_Vf Input Wattmeter Forward Power voltage 70 GND 71 NC 72 GND
Input Provides 2V (Host Core) power up
sequence control
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
73 PSM_4.2MHz+ To PA for PSM 74 GND 75 PSM_4.2MHz- To PA for PSM 76 GND 77 NC 78 Fan_PWR_Status 79 SPARE DIFF Pins 79 and 81 form diff pair spare 80 GND 81 SPARE DIFF Pins 79 and 81 form diff pair spare 82 GND 83 NC 84 GND 85 Wattmeter_Vr Input Wattmeter Reflected Power voltage 86 GND 87 Fan Fail Lamp Test Normally high, a logic low will illuminate the
Fan Fail LED 88 GND 89 NC 90 GND 91 TEMP Temperature signal from Circulator. Goes to
ADC1 channel 0 (first channel) 92 GND 93 5VDC 94 5VDC 95 5VDC 96 5VDC 97 5VDC 98 5VDC 99 5VDC
100 5VDC 101 ANT_RLY_PDx A low indicates the antenna relay is present 102 GND 103 ANT_RLY Output From PC30 on DSP.
Needs to be defined. Voltage level,
protection, default state etc.
104 GND 105 FAN_FAIL Input Multidrop signal? 106 GND 107 FAN_POWER_
CNTL
108 FAN_DETECTx Input Multidrop signal? 109 ALT_RESETx Output (for PA and PS) 110 GND 111 NC 112 GND 113 PA_SPI_CLK Output Dedicated SPI_CLK for PA 114 GND 115 NC 116 PA1_SPI_EN Output 117 PA1_PRESENCE_D
ETECT 118 GND 119 PA_ENABLEx Output Low activates PA(for P2 HW and beyond)) 120 GND 121 NC 122 HPB_IRQx Input 123 HPB_SPI_EN Output 124 GND 125 NC
Output Controls fan power switch on XCVR RF
board.
Input Pulled down by PA when PA is present
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
126 HPB_PRESENCE_
DETECT 127 HPB_SPI_CLK Output Dedicated SPI_CLK for HPB 128 GND 129 NC 130 GND 131 SPI_A0 Output SPI, to PS&PA 132 GND 133 NC 134 SPI_A1 Output SPI, to PS&PA 135 SPI_A2 Output SPI, to PS&PA 136 GND 137 SPI_A3 Output SPI, to PS&PA 138 GND 139 NC 140 SPI_MOSI Output SPI 141 SPI_MISO Input SPI 142 GND 143 NC 144 GND 145 PS1_SPI_EN Output 146 GND 147 NC 148 PS1_FAULT Input Indicates to XCVR Control board that the
149 PS_PRESENCE_D
ETECT 150 GND 151 PS_SPI_CLK Output Dedicated SPI_CLK for PS 152 GND 153 NC 154 BP_ID1 Input/Output BP_ID1 155 NC 156 GND 157 EXT_REF Input 158 GND 159 NC 160 EXT_1PPS Input
Input Pulled down by HPB when HPB is present
Power supply detected a fault condition and to write the condition to its EEPROM before it goes off-line.
Input Pulled down by PS when PS is present
RF Board Receiver Interconnect
The XCVR Control board interfaces to the RF board via a ribbon cable. The signals going to the RF board Receiver’s interface are shown in the following Table.
RF Board Receiver Interconnect
Pin # Signal Type Function/Notes
1 Attn_Cntl_1_5 Output To RCVR from FPGA GPIO1_5 2 GND 3 Attn_Cntl_1_4 Output To RCVR from FPGA GPIO1_4 4 GND 5 Attn_Cntl_1_3 Output To RCVR from FPGA GPIO1_3 6 GND 7 Attn_Cntl_1_2 Output To RCVR from FPGA GPIO1_2 8 GND
9 Attn_Cntl_1_1 Output To RCVR from FPGA GPIO1_1 10 GND 11 Rcvr3_CU_Cntl Output switch control for RX power
From Host
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
12 GND 13 Abacus3 FS3 Input From Abacus3_3, to FPGA 14 GND 15 Abacus3 Data3 Input From Abacus3_3, to FPGA 16 GND 17 Abacus3 Clk3 Input From Abacus3_3, to FPGA 18 GND 19 Abacus3 FS2 Input From Abacus3_2, to FPGA 20 GND 21 Abacus3 Data2 Input From Abacus3_2, to FPGA 22 GND 23 Abacus3 Clk2 Input From Abacus3_2, to FPGA 24 GND 25 Abacus3 FS1 Input From Abacus3_1, to FPGA 26 GND 27 Abacus3 Data1 Input From Abacus3_1, to FPGA 28 GND 29 Abacus3 Clk1 Input From Abacus3_1, to FPGA 30 GND 31 Rcvr2_CU_Cntl Output Switch control for RX power
From Host 32 GND 33 Attn_Cntl_2_5 Output To RCVR from FPGA GPIO2_5 34 GND 35 Attn_Cntl_2_4 Output To RCVR from FPGA GPIO2_4 36 GND 37 Attn_Cntl_2_3 Output To RCVR from FPGA GPIO2_3 38 GND 39 Attn_Cntl_2_2 Output To RCVR from FPGA GPIO2_2 40 GND 41 Attn_Cntl_2_1 Output To RCVR from FPGA GPIO2_1 42 GND 43 Aba_SPI_En3
44 GND 45 Aba_SPI_Data3 46 GND 47 Aba_SPI_Clk3 48 GND 49 Aba_SPI_En2 50 GND 51 Aba_SPI_Data2 52 GND 53 Aba_SPI_Clk2 54 GND 55 Aba_ SPI_En1 56 GND 57 Aba_ SPI_Data1 58 GND 59 Aba_ SPI _Clk1 60 GND 61 SPI CLK Output SPI CLK 62 GND 63 RCVR_SPI_EN Output From Host pin PD6 64 GND 65 SPI MOSI Output 66 GND 67 SPI MISO Input 68 GND 69 SPI Addr2 Output SPI Addr signal (MSB) for Abacus3s,
Metering, tunable filters, and LV
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
Fract-N. See DSP SPI section for
address decoding. 70 GND 71 SPI Addr1 Output SPI Addr signal for Abacus3s, Metering,
tunable filters, and LV Fract-N. See DSP
SPI section for address decoding. 72 GND 73 SPI Addr0 Output SPI Addr signal (LSB) for Abacus3s,
Metering, tunable filters, and LV Fract-N.
See DSP SPI section for address decoding. 74 GND 75 Noise_Cntl_1 Output To RCVR from FPGA GPIO2_0 76 GND 77 SYNCB Output Reset SSI data 78 GND 79 GND 80 GND 81 16.8MHz_ref 82 GND 83 GND 84 GND
RF Board Exciter Interconnect
The XCVR Control board interfaces to the RF board Exciter interface via a ribbon cable. The signals going to the RF board Exciter’s interface are shown in Table 8.9.
RF Board Exciter Interconnect
Pin # Signal Type Function/Notes
1 Exciter_PWDN Shuts off power to Exciter 2 GND 3 RXD Receive data for PSM (to Host SCC3) 4 GND 5 RCLK Receive Clock for PSM (to Host SCC3) 6 GND 7 RFS Frame Sync for PSM (to Host SCC3) 8 GND
9 PSM_ACQ 10 GND 11 Exc_Tmhk_
Resetx 12 GND 13 Exc_Jav_Resetx Alt_Resetx AND’ed Exc_Jav_Resetx
14 GND 15 Spare 16 GND 17 Javelin TSLOT/Tx
Enable 18 GND
19 GND 20 GND 21 SCF_2X_CLK
22 GND 23 SCF_CLK From FPGA 24 GND
Output Alt_Resetx AND’ed Exc_Tmhk_Resetx
(From Host PC31)
(From Host PC27 )
Output Exciter, GPIO from MSC8101 (Pin PA23).
Note PA22 reserved for TSLOTB if differential signaling is used
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
25 DMCS Output Exciter, to Tomahawk 26 GND 27 Tomahawk FS Input Exciter, from Tomahawk 28 GND 29 Spare 30 GND 31 SSI Data Output Exciter, to Tomahawk 32 GND 33 GND 34 GND 35 SSI CLK Input Exciter, from Tomahawk 36 GND 37 GND 38 GND 39 Spare 40 GND 41 Spare 42 GND 43 Power Detector
dynamic range
control Cntl* 44 GND 45 GND 46 GND 47 SPI CLK Output Exciter , same signal to Rcvr 48 GND 49 Exciter_SPI_En Output From Host 50 GND 51 SPI MOSI Output Exciter , same signal
52 GND 53 SPI MISO Input 54 GND 55 Spare 56 GND 57 SPI_A3 Output SPI MSB Address signals for Tomahawk,
58 GND 59 SPI_A2 Output SPI Address signals for Tomahawk, Javelin,
60 GND 61 SPI_A1 Output SPI Address signals for Tomahawk, Javelin,
62 GND 63 SPI_A0 Output SPI LSB Address signals for Tomahawk,
64 GND 65 GND 66 GND 67
TX Forward
Switch Cntl* 68 GND 69 Spare . 70 GND
Output from Host pin PA22. This signal is
pulled down.
to Rcvr
Javelin, EEPROM, LV Fract-N, and Metering CSs. (See SPI section for address decoding.)
EEPROM, LV Fract-N, and Metering CSs. (See SPI section for address decoding.)
EEPROM, LV Fract-N, and Metering CSs. (See SPI section for address decoding.)
Javelin, EEPROM, LV Fract-N, and Metering CSs. (See SPI section for address decoding.)
From Host
Normally low.
EXHIBIT D1-6
APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC5810
User / Operational Manual
Functional Description / Operation of Modules and Interconnect (Draft)
Pin # Signal Type Function/Notes
71
DSP_DC_NULL_ DOUT
72 GND 73 DSP_DC_NULL_
DIN 74 GND 75 DSP_DC_NULL_
CS 76 GND 77 DSP_DC_NULL_
CLK 78 GND 79 GND 80 GND 81 16.8MHz_ref Output Exciter , Javelin 82 GND 83 GND 84 GND
Input to FPGA
SPI_ADC_MISO
Output from FPGA
SPI_ADC_MOSI
Output from FPGA
SPI_ADC_CS
Output from FPGA
SPI_ADC_CLK
Front Panel RS-232 / Ethernet (DB9) / RJ45 Interface
The Front Panel CST port supports 2-wire RS-232 on a DB9 connector and 10/100BaseT Ethernet on a RJ45 connector. See tables below for connector pinout.
Only the TXD and RXD signals are supported by the SMC, no other handshake signals are provided. Refer to the SMC section of the MPC8250 User’s Manual for features and programming information. The table below shows the signals supported along with the Host hardware resource responsible the RS232 signals.
The front panel also supports a 10/100BaseT Ethernet port. The connector is configured and an MDI-X port that can be connected to a laptop using a standard cable. In essence, the transmit and receive signal pairs are reversed on the BRC front panel compared to that defined in IEEE Std. 802.3 Clause 14.5.1. The Ethernet PHY is a Broadcom BCM5221. Its address (4:0) is '00100'. Both the Front Panel Ethernet PHYand the CP2 PHY (BCM5222) communicate to the Host via the "bit -banged" GPIO MDC and MDIO signals.
Front Panel Port Signals
RJ45 Pin # RS-232 Signal
1 RD+ (Ethernet) 2 RD- (Ethernet) 3 TD+ (Ethernet) 4 NC 5 NC 6 TD- (Ethernet) 7 NC 8 NC
Front Panel RS232 Cable Adapter
RJ45 Pin # RS232 DB9 / Female
1 NC 2 TXD (RS232) (Host PA9) 3 RXD (RS232) (Host PA8) 4 NC 5 GND 6 Ext_Trigger_In (DSP IRQ1) 7 NC 8 GND 9 Ext_Trigger_Out (DSP PA20)
EXHIBIT D1-6
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