Trimble ELIZABETH35 User Manual
p
y
TRM-1
Deleted:
Low-band RF Power Amplifier
Formatted
Product Requirements Document
Revised August 20, 2003
Deleted: Version 1A¶
Deleted: A
Deleted: May 3, 2003
Deleted: Jul
ril 147, 200331057
1, 2003nely31
Vytek TRM-1 PRD
Vytek Wireless
Wireless Products Division
2310 Cousteau Court
Vista, CA 92083, USA
(760) 536-1000
www.vytek.com
Deleted: T
1
TABLE OF CONTENTS
¶
¶
Technical Brief.....................................................................................................................3
Scope................................................................................................................................3
Functionality ....................................................................................................................3
Design Philosophy ...............................................................................................................3
Robustness .......................................................................................................................3
Implementation and Construction....................................................................................3
Operation..........................................................................................................................4
Specifications.......................................................................................................................4
Hardware Block Diagram ....................................................................................................6
Interface Definitions ............................................................................................................7
Power Supply Connector .................................................................................................7
Power Amplifier Module Connector ...............................................................................8
Filter / Coupler Module Connector..................................................................................8
Rear Panel DC Power Connector.....................................................................................9
Rear Panel RS232 Connector...........................................................................................9
Controller Connections ..................................................................................................10
FPGA Register Definitions............................................................................................12
Software Description .........................................................................................................13
Alarms Types & Behavior .............................................................................................13
Power Amplifier Alarms............................................................................................13
Power Supply Alarms ................................................................................................15
“Push” Enabling for alarm conditions ...........................................................................15
Alarm Algorithms ..........................................................................................................16
State Machine.................................................................................................................17
PA Cutover.....................................................................................................................18
Manual PA/PS Offline ...................................................................................................18
Serial Port Commands available to User .......................................................................19
LEDs ..................................................................................................................................20
LIST OF TABLES
Table 1: Specifications............................................................................................................................................ 5
Table 2: Power Supply Connector.......................................................................................................................... 7
Table 5: Power Amplifier Connector...................................................................................................................... 8
Table 6: Rear Panel RS232 Connector ................................................................................................................... 9
Table 7: Power Amplifier Alarms......................................................................................................................... 13
Table 8: Serial Port Commands available to User................................................................................................ 19
Vytek TRM-1 PRD
Deleted: Technical Brief
Scope
3¶
Functionality
Design Philosophy
Robustness
Implementation and Construction
Operation
Specifications
Hardware Block Diagram
Interface Definitions
Power Supply Connector
Power Amplifier Module Connector
Filter / Coupler Module Connector
Rear Panel DC Power Connector
Rear Panel RS232 Connector
Controller Connections
FPGA Register Definitions
Software Description
Alarms Types & Behavior
Power Amplifier Alarms
Power Supply Alarms
“Push” Enabling for alarm conditions
Alarm Algorithms 16¶
State Machine
PA Cutover
Manual PA/PS Offline
Deleted: Technical Brief
Scope
Deleted: Technical Brief
Scope
Deleted: Technical Brief
Scope
Deleted: Technical Brief
Scope
Deleted: Technical Brief
Scope
Deleted: Technical Brief
Scope
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Formatted
Formatted
Formatted
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Formatted
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Deleted: 20
Formatted
Deleted: Table 1: Specifications
Table 2: Power Supply Connector 7¶
Formatted
Deleted: Table 1: Specifications 5¶
Table 2: Power Supply Connector 7¶
Formatted
Deleted: Table 1: Specifications ¶
Table 2: Power Supply Connector ¶
Formatted
Deleted: Table 1: Specifications ¶
Table 2: Power Supply Logic
Formatted
Formatted
3¶
3¶
4¶
4¶
17¶
18¶
3¶
3¶
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3¶
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3¶
3¶
3¶
3¶
6¶
7¶
7¶
8¶
8¶
9¶
9¶
10¶
12¶
13¶
13¶
13¶
15¶
18¶
15
... [1]
3¶
... [2]
3¶
... [3]
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... [4]
3¶
... [5]
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... [6]
3¶
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5¶
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2
Technical Brief
Scope
The scope of this PRD is to describe the technical implementation of a custom modular Low-Band RF Power
Amplifier Unit. The PA is part of a wide-area
data network base station. It is non-linear, with redundancy
built-in for extra reliability and up-time.
Functionality
The amplifier takes in a constant-envelope (CE) RF signal at a level of approximately 5dBm, and amplifies it to
a level of 56dBm (400 watts). The amplifier module and
the power supplies are all fully redundant. A CPU
monitors the amplifier, manages alarms, and controls the switching of redundant circuits.
The internal CPU provides a Command Line Interface (CLI) via an RS-232 serial port, for an external device to
monitor and control its operation.
The Amplifier runs off of 90-130V AC input. The CPU controller will also operate off of an external DC input,
if available.
Design Philosophy
Robustness
The design will incorporate, to the extent feasible and cost effective, margin against the specified criteria. In
each case the margin is determined from the expected normal variations in manufacturing parameters and
device variations as they apply to the design. Additionally, the product incorporates robust circuit design to
require minimal alignment or tuning during test. To the extent possible, all components will be surface mount
and utilize multiple source parts.
The amplifier must self-protect against all fault conditions. In particular, care is taken to prevent damage due
to:
1. Reverse DC voltage
2. RF overdrive
3. High VSWR on output
4. Over-temperature
5. Failure of any LRU
Deleted: ¶
John Sonnenberg¶
Vytek Wireless¶
Vista, CA ¶
¶
Deleted: Final PA
Deleted: circuit
Deleted: ,
Deleted: y circuit, the cooling fan, and
the driver circuit
Deleted:
Formatted: Bullets and Numbering
Page Break
Page Break
Implementation and Construction
The amplifier is divided into these sections, each section capable of being tested by itself.
1. Two field replaceable 500 watt RF Amplifier Modules.
2. An RF switch to select which output stage is routed to the antenna.
3. Lowpass Filter and RF wattmeter with directional coupler.
4. DC monitoring (current and voltage)
5. CPU Controller (bias voltage generation, AGC management, monitoring, CLI, alarming…)
6. Two field replaceable AC power supplies.
Vytek TRM-1 PRD
Formatted: Bullets and Numbering
3
Operation
The amplifier should look like a gain block, with some AGC for power leveling.
It powers up in the “on” state.
Specifications
Parameter Customer Specification Design Goals Notes
System
Temperature Range 0 to +50 C ambient -30 to +60 C
Shock So LRUs can be easily packed and
Size 19” open telecom rack mount
Weight TBD <50 lbs
Line Replaceable Units PAs/Drivers, Fans, AC-DC Supplies PAs/Drivers, Fans, AC-DC Supplies Plug-in LRUs are hot swappable
MTBF
Time To Repair 10 minutes max to replace LRU to fix
EMC, Line Faults and
Lightening Protection
Hot Standby stages PA, Driver, Fan, AC-DC converter PA, Driver, Fan, AC-DC converters
TBD height
25,000 hours f or soft failures
80,000 hours f or hard failures
soft failure
UL Approved A C power supp ly
Lightening protection on RF output
19” rack mount, 6 U tall, 17” deep.
50,000 soft fail
100,000 hrs hard-fail
2 minutes to replace LRUs
UL Approved AC power supply
Lightening protection on RF output
15kV ESD on all other I/Os
Power Amp
Power Line Input 110 VAC; 60 Hz
AC Power Switch and
Breaker
Frequency Range 35.15 to 35.75 MHz 32-38 MHz No tuning
Input Signal +5 dBm (+/-3 dB)
Input Connector Panel-mount N-Type female TNC female
Output Power 400 W (+/- 1 dB) Programmable 250-500 watts +/- 1dB
Harmonics and Spurious Per FCC 22.359 (b)(1)
Harmonic Filter All harmonics up to 500MHz, <80dBc Some tower contracts require the use of
Type Approva ls None None Trimble will take respo nsibility for this
Output Impedance 50 ohms 50 ohms
Output Match Operate into 2:1 VSWR
Output Connector 7/16 DIN female 7/16 DIN female
Duty Cycle 100 % 100% at up to 500 watts. Will not usually be operated below 50 %
Soft-fail cut-over < 2 Seconds Time to switch over to redundant back-
< 10 Amps
On front or rear panel Rear Panel Bump-proof
50 ohms
single carrier
constant envelope phase modulation
< 40 kHz bandwidth
nominally 2 Hz pulse with 99% duty
<-30dBm in OFF mode,
Rise/Fall time < 5 mS and >100uS
with 10 dB margin for +/- 50 kHz
Also, close-in spurs (+/- 15 kHz) < -45
dBc
No damage into infinite VSWR
90-130VAC, <10A at 110Vac
+5 dBm (+/-3 dB)
50 ohms
single carrier
constant envelope phase modulation
< 40 kHz bandwidth
nominally 2 Hz pulse with 99% duty
<-30dBm in OF F mode,
Rise/Fall time < 5 mS and >100uS
0-50C; +/-1.5dB –30 to +60 C
Per FCC 22.359 (b)(1)
with 10 dB margin for +/- 50
kHz
Also, close-in spurs (+/- 15 kHz) < 45 dBc
Operate into a 3:1. No damage into
infinite VSWR.
Controller
Battery Power Input 10-16 VDC 10-32V Controller operates independent of AC
Vytek TRM-1 PRD
shipped via Fedex
Soft failures don’t degrade performance.
Room temperature calculations.
Assume “authorized bandwidth” of 20
KHz
Test with pure carrier
Do we need additional limits such as
those for Unintentional Radiators or
Restricted Bands as specified in Part 15?
No
a “harmonic filter.” While the
performance of this device isn’t
specified, we should have something in
the P.A. that we can point to and call a
“harmonic filter.”
up circuitry.
Deleted: Expected Operating
Performance
Formatted
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Deleted: Multiple chassis may be
appropriate
Deleted:
Deleted: o
Deleted: N
Deleted: <500mS
Deleted: 00
Deleted: mS
4
< TBD Amps power to power amp. Battery MUST be
Control Interfaces Serial port for local console
Measurements Volta ges, currents, forward and
Alarms Via Control Serial port. Via Control Serial port. LED alarm
Console Protocol VT100 over serial port
Network Protocols none none
Connectors DB9 female for console
Firmware update Via serial port Via serial port
Soft-fail modes Fan monitoring
Hard reset input Via RTS pin on Serial Port Via RTS pin on Serial Port or via
Internal Measurement
Accuracy
RF leveling time constant
for change s in drive lev el.
Antenna Switching No “Hot Switching” Power Amplifiers must be in “standby”
reflected RF power, temperature, fan
health, alarms, PA stage in use.
XModem or Ymodem for software
upgrading
PA stage
Driver Stage
AC-DC converter
Power +/- 0.5dB
<10 seconds.
Serial port for local console,
38400 bps, N,8,1.
Voltages, currents, forward and
reflected RF power, temperature, fan
health, alarms, PA stage in use.
status.
VT100 over ser ial port
XModem or XModem/1k
upgrading
DB9 Female
Fan monitoring
PA stage
Driver Stage
AC-DC converter
serial command. RTS reset ability
may be defeated by removal o
internal jumper.
Voltage
+/- 2%
Current +/- 5%
Temperature +/- 3 degrees
for software
f
present in order to ensure operation of
controller when amplifier power is off.
As appropriate on all fans, power
supplies, power amp stages
Failure of any one of these components
will not cause the amplifier to cease
operation.
Unit is operational when RTS is asserted
and held in reset when not asserted.
Power valid for VSWR < 1.15:1
or “off” state when changing the antenna
switch setting.
Table 1: Specifications
Deleted: 192
Deleted: o
Deleted: External alarm output.
Deleted: Ymodem
Deleted: E
Deleted: A PA failure may require a
3dB reduction of power output.
Deleted: i
Deleted: Volatage
Deleted: ¶
V
Formatted
Vytek TRM-1 PRD
5
Hardware Block Diagram
Deleted: Page Break
TRM-1 Power Amplifier
VyTek Wireless
Battery
10 to 18 volts
Input
Power Supply
Module
110
VAC
Input
Power Supply
Module
Input Pow er
Limiting Amplifier
Supply Power
LPF
Control
48 volts
48 volts
Control
Driver
Voltage
Regulators
and
Switches
Controller Module
Analog Controls
and Status
Temp
Sensor
Power
Amplifier
Power Amplifier Module
15 volts
5 volts
Fans
Atmel
ATmega128
Processor
A/D Inputs
LEDs
Tx
Alarm
FPGA
Atmel
EP1K30
DAC Outputs
External
I/O
Connector
RF Input
Vytek TRM-1 PRD
Input Pow er
Limiting Amplifier
Supply Power
LPF
Driver
Analog Controls
and Status
Temp
Sensor
Power
Amplifier
Power Amplifier Module
Fwd Pwr Rev Pwr
LPF
RF Output Module
RF Output
6
Interface Definitions
Power Supply Connector
Pin Name Function
1 +Vout Output Voltage
2 +Vout Output Voltage
3 GND Output Return
4 GND Output Return
5 -Sense Connect to Ground
6 Vout Adjust Output Voltage Control. Vout = 59v – 2.42v – 1.8 x {Vout Adjust}
59v – 2.42v – 1.8 x {Vout Adjust = 5v} = 47.6 volts
7 OC Alarm Over Current Alarm
8 Iout Monitor Output Current Monitor. Iout monitor = Iout x 10-4. Not Connected.
9 Share Bus Connect with Share Bus of the other Power Supply. Not Connected.
10 Enable Low = Enable Power Supply. Floating or High = Turn Power Supply Off.
11 +Vout Output Voltage
12 +Vout Output Voltage
13 GND Output Return
14 GND Output Return
15 +Sense Connect to Output Voltage
16 NC No Connect
17 V Shift Voltage Shift Input. Connected to Vout.
18 OV Alarm Over Voltage Alarm
19 GND Output Return
20 Rect Fail High = Power Supply is OK. Low = Power Supply Failure.
21 +Vout Output Voltage
22 GND Output Return
23 GND Output Return
24 GND Output Return
25 SD0 Serial Data Option. Not Connected.
26 SD1 Serial Data Option. Not Connected.
27 AC Sense Low = AC is < 60 VAC. High if AC is > 60 VAC.
28 OV Adjust Over Voltage Adjustment Pin. OV Level = 60v – 1.2 x {OV Adjust}
60v – 1.2 x {OV Adjust = 5v} = 54 volts
60v – 1.2 x {OV Adjust = 8.3v} = 50 volts
29 Lamp Test Turn on all LEDs for Testing. Not Connected
30 On / Off Front Panel Power Switch Status. Low = On, High = Off
Table 2: Power Supply Connector
Formatted
Deleted: . Not Connected.
Deleted: ,
Deleted: 1
Deleted: ,
Deleted: 2
Deleted: Not Connected.
Deleted: 3
Deleted: OV Level = 60v – 2.2 x {OV
Adjust}
Deleted: Not Connected.
Deleted: 4
Deleted: 25
Formatted
Deleted: Logic
Deleted: Controller: Power Supply
Logic Connector
Vytek TRM-1 PRD
7
Power Amplifier Module Connector
Pin Name I/O Function
A1 GND Input High Current Ground
A2 +48V Input High Current Power Supply (+48 volts)
1 Installed Output “Amplifier Installed” signal to the Controller.
Connected to Ground inside of the PA. Floats high when
module is not plugged-in.
2 Not Connected
3 V_out Output Low Current Power Supply Loopback to Controller
4 Amp_Select Input Amplifier Select Switching:
(+15 volts = Amplifier 1, Low = Amplifier 2)
Note: Internal pullup to +15 volts required.
5 +5V_Controller Input +5 volts from the Controller
6 RF_Detect Output RF Input Detector
7 Fan_On Input Fan Power On Signal (+28V = Fan On, 0V = Fan Off)
8 TX_LED Input Drive to the TX LED from Controller
9 RF_det_thresh Input RF Detector threshold voltage from Controller
10 Fan_2 Output Fan #2 Current Sensor Analog Signal
11 Address Input Amplifier Identification:
(0 = Amplifier 1, Float = Amplifier 2)
12 Amp_Bias Input Bias Voltage (Analog Control Signal from Controller)
13 Temp Output Temperature analog signal
14 Fan_1 Output Fan #1 current sensor analog signal
15 Alarm LED Input Alarm LED Digital Control Signal (0 = OK, 1 = Alarm)
Table 3: Power Amplifier Connector
Filter / Coupler Module Connector
Pin Name I/O Function
1 Ground
2 +5v_Controller Input +5 volts from Controller
3 Fwd Offset Input Bias Voltage for Forward Power Detector
4 Fwd Power Output Forward Power Detector Analog Signal
5 Rev Offset Input Bias Voltage for Reverse Power Detector
6 Rev Power Output Reverse Power Detector Analog Signal
7 NC
8 NC
9 NC
Vytek TRM-1 PRD
Deleted: Table : Controller: Rear Panel
I/O Connector
Formatted
Deleted: In1 Pwr
Deleted: Fwd Bias
Deleted: PA #1 Input Power Sensor
Analog Signal
Deleted: Forward Power Bias
Deleted: In2 Pwr
Deleted: Rev Bias
Deleted: PA #2 Input Power Sensor
Analog Signal
Deleted: Reverse Power Bias
Deleted: Driver
Deleted: +15V
Deleted: BiasDriver Bias
SignalTemp1PA #1 Temperature Sensor
Analog SignalTemp2PA #2 Temperature
Sensor Analog Signal
Deleted: Table : Controller: Control &
Status Connector¶
Deleted: <#>¶
Formatted
Deleted: In Pwr
Deleted: Input Power Sensor Analog
Signal
Deleted: Driver Bias
Deleted: Temp
Deleted: DC Voltage… Out to PA
Deleted: Temperature Sensor Analog
Signal
Deleted: …
Deleted: Low = Amplifier 1,
Deleted: BiasA…
Deleted: d…
Deleted: S
Deleted: s
Deleted: elect D
Deleted: d
Deleted: igital
Deleted: …s
Deleted: 0…#1…1…#2
Deleted: a…s
Deleted: Gnd
Deleted: B
Deleted: analog
Deleted: d…s
Formatted
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... [20]
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8
Rear Panel DC Power Connector
Pin Name Function
1 Monitor Controller Power Monitor (Don’t apply an
2 Gnd Ground
3 Gnd Ground
4 Battery Battery Backup Power (8 to 24 volts)
Rear Panel RS232 Connector
DB9 Female Connector
Pin Name Function
1 DCD No Connection
2 RXD Receive Data from the unit
3 TXD Transmit Data to the unit
4 DTR No Connection
5 GND Ground
6 DSR No Connection
7 RTS Active level enables the unit. Inactive level
8 CTS No Connection
9 RI No Connection
external voltage to this pin, but it may be
used to monitor the actual controller voltage
if desired.)
resets the unit, Jumper Selectable
Table 4: Rear Panel RS232 Connector
Deleted: 6
Vytek TRM-1 PRD
9
Controller Connections
Pin Name I/O Logical Connection Function
J1-1 +5v Output Voltage Regulator +5 Volts from Controller
J1-2 Temp 2 Input CPU ADC2 Temperature Sensor Signal from Amp #2
J1-3 Gnd
Pin Name I/O Logical Connection Function
J2-1 Fan1 Input FANA MUX
Fan #1 current sensor analog signal
to CPU ADC6
J2-2 Fan2 Input FANB MUX to
Fan #2 current sensor analog signal
CPU ADC6
J2-3 Input FANC MUX to
Unused current sensor analog signal
CPU ADC6
J2-4 Fan_On Output FPGA Pin 130 ->
Q6 FET Switch
Fan Power On Signal
(+28V = Fan On, 0V = Fan Off)
J2-5 Alarm LED1 Output CPU PB0 Amp #1 Alarm LED Control Signal
(0 = OK, 1 = Alarm)
J2-6 Alarm LED2 Output CPU PB6 Amp #2 Alarm LED Control Signal
(0 = OK, 1 = Alarm)
J2-7 TX LED Output CPU PB2 Transmit LED (1 = On)
J2-8 Ground
J2-9 Rev Power Input CPU ADC1 Reverse Power Detector Analog Signal
J2-10 Rev Offset Output DAC U11-B Bias Voltage for Reverse Power Detector
J2-11 Output Voltage Regulators +5 Volts
J2-12 Ground
J2-13 TP16
J2-14 Amp Select Output CPU PB5 -> Q5
FET (Open Drain)
Amplifier Select Switching:
(Low = Amplifier 1, Hi-Z = Amplifier 2)
Pin Name I/O Logical Connection Function
J5-1 Power Input Voltage Regulators Input Supply Voltage (+28 volts nominal)
J5-2 Gnd Ground
J5-3 Gnd Ground
J5-4 Curr Sens Input CPU ADC5 Current Sensor Input
J5-5 +5v Output Voltage Regulator +5 Volts
Pin Name I/O Logical Connection Function
J15-1 Output Voltage Regulator +5 Volts (Analog)
J15-2 Ground
J15-3 (mod1_bias) Output DAC U13-A
J15-4 (mod2_bias) Output DAC U13-B
J15-5 (mod3_bias) Output DAC U13-C
J15-6 (mod4_bias) Output DAC U13-D
J15-7 Amp 1 Inst
(intspi_cs1)
J15-8 RF_det_thresh
Input FPGA Pin 59 0 = Amplifier 1 Installed
(Must be pulled up by FPGA.)
Output DAC U12-D PA RF Detector threshold voltage
(drvr_stg_bias)
Vytek TRM-1 PRD
Deleted: Select Digital
Deleted: 0
Deleted: off
Deleted: 1
Deleted: on
Deleted: CPU PB5 to
Deleted: FPGA Pin 135
Deleted: Hi-Z
Deleted: Low
10
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