SRD_-_HF_HPA_systems_for_USA_2016_07_21_(V2).docx

ATTACHMENT 2- SYSTEM REQUIREMENTS/ SPECIFICATIONS

UNCLASSIFIED

System Requirements Document for High Power HF Transmit Shelters Rev. 1.0 6 April 2016

Table of Contents

1. Requirements

Mechanical

· The entire amplifier equipment for a single system shall be installed in one (1) modular shipping container enclosure (shelter) with a lockable double swing door at one of the ends. The container shall conform to the ISO standard ISO 668-2013 and ISO 1496-1:2013.

· Form factor – the shelter external dimensions shall not exceed 19.875ft(L) x 8ft(W) x 8.5ft(H).

· There shall be a second entrance/exit securable with keyed lock. The dimensions of this entrance shall be:

· Threshold - 72’’(T) x 30’’(W)

· Objective - 80’’(T) x 36’’(W)

· The shelter shall be wired with an electrical power system that includes: a panelboard, protected internal wiring, ceiling lights, smoke detector, and safety exit sign that remains lit for at least 5 minutes after power is removed. The panelboard shall have individual branch circuits for each major electrical sub-system. Each amplifier channel shall be supplied by an individual branch circuit. The entire electrical system shall meet the requirements of NFPA 70 – National Electrical Code (2014 edition).

· The shelter shall be fitted with a heating, ventilation and air conditioning system (HVAC). No part of the HVAC system shall extend beyond the dimensions of the shelter. The ventilation system shall provide adequate air exchange to support human occupation when the shelter is closed.

· The shelter shall have an anti-static floor installed.

· The shelter shall have the following internal-to-external interfaces installed. All interfaces shall have a removable cover which seals the interface during shipping or storage.

· General I/O patch panels: the shelter shall have 3 patch panels. The dimensions shall be 16’’ (W) x 24’’ (T), ±2’’ on each dimension. 2 panels shall be located on the 8ft (W) x 8.5ft (T) side opposite the side containing the double swing doors. 1 panel shall be located on the 19.875ft (L) x8.5ft (T) side nearest to the equipment rack(s). The panels shall be constructed of removable aluminum sheeting. The 2 panels located on the same side shall be preconfigured with one N-type female-female bulkhead connector for each amplifier channel.

· The gross weight of the shelter and all configured components shall not exceed 16,000lbs. The shelter shall have an additional weight capacity of 5,000lbs.

· The shelter shall be configured with forklift pockets.

· Threshold: 1 set with 81.5’’ separation on center and pocket size 14’’ (W) x 4’’ (H).

· Objective: 2 sets. (a) 81.5’’ separation on center and pocket size 14’’ (W) x 4’’ (H), (b) 37’’ separation on center, at least 12’’(W)x4’’(H).

· The shelter shall be constructed of Corten® Steel and painted with white marine grade epoxy paint.

· The shelter shall be fully insulated with a minimum R-5 insulation rating

· The shelter shall contain an ABC fire extinguisher mounted on the interior of the shelter and a ceiling mounted fire alarm.

· The minimum acceptable manual fire extinguisher with secure storage capability and ceiling mounted smoke detector.

An image of a potential shelter solution meeting some, but not all the requirements is shown in Figure 1. Figure 2 shows a notional layout of some of the major sub-system components inside a shelter.

Figure 1 - Example picture of potential enclosure – 20ft Shipping Container.

Patch Panel Wall Mount AC Antenna I/O Antenna I/O HVAC Compressor Compartment 2nd Door Power Amplifier Units x 10 Power Amplifier Units x 10 Equipment Rack Wall Mount AC and Electrical Box ~20ft ~8ft Swing Out Doors Ceiling Lights Ceiling Lights

Figure 2 - Notional internal layout of enclosure.

Heating and Air Conditioning System (HVAC)

· The enclosure shall contain an HVAC system capable of cooling and heating the interior of the shelter while the amplifier equipment is running at full output power.

· No part of the HVAC system shall extend beyond the outer dimensions of the container, i.e. exterior mounted HVAC systems are not acceptable. One possible solution is a split HVAC system similar to the LG 33,000BTU ductless unit, model #LSN360HV3/LSU360HV3. Multiple units are allowed if dictated by cooling requirements. The threshold range of exterior operating temperatures is -20 to 40 degrees Celsius. The objective range of exterior temperatures is -30 to 50 degrees Celsius.

· The HVAC system shall be designed to control the temperature of the shelter with all doors closed.

· It is permissible to configure the HPA system to cool the amplifier equipment with a separate cooling system. Examples of potential separate amplifier cooling systems are forced exterior air and water cooling.

Electrical System and Wiring

· All electrical equipment and wiring shall be configured to run on 60Hz power.

· The enclosure shall contain an electrical distribution system capable of supporting the simultaneous operation of the full transmit power, HVAC systems, and 60A/120VAC/single phase of additional power for auxiliary hardware.

· Each electrical sub-system shall be on an individual branch circuit.

· The shelter shall be wired with three auxiliary 20A/120VAC/single phase circuits. Electrical outlet boxes shall be wired to each circuit and located near the base of the auxiliary equipment racks. Each outlet box shall contain (4) 20A receptacles.

· The shelter shall contain at least two ceiling lights installed on the internal ceiling of the enclosure to provide working light. The lights shall be controlled by switches located adjacent to each shelter entry/exit door.

· The electrical system shall be capable of being powered from an external source of three-phase, 4-wire 208Y/120VAC power with a separate equipment grounding conductor. Permanent power connection points shall not extend beyond the external dimensions of the shelter. Power connection points shall be shielded from the external environment.

· The electrical panel-board shall have digital ammeters displaying the real-time current draw per power phase.

· On the interior of the shelter there shall be an emergency stop button which disconnects power from all the amplifier electrical circuits.

Auxiliary Equipment Racks

· The enclosure shall contain one or more equipment racks capable of storing standard 19’’ wide rack mountable equipment.

· The internal depth of each rack shall be 24.8’’.

· The rack(s) shall be mounted to both the floor and ceiling, with shock mounting.

· A total of 48U empty rack space shall be present, except for the specified RF drive, forward power, reverse power, and amplifier control ports mounted on patch panels.

· All amplifier channels shall be pre-wired with RF drive terminals wired to a common area in the equipment rack. Forward and reverse power monitoring ports for each channel shall also be included in the rack area. All ports shall be mounted on a patch panel in the rack. The ports shall be female BNC connectors.

· The rack shall also include a patch panel with female RJ45 Ethernet ports for each of the amplifier control modules.

· The rack(s) shall be orientated in a manner that allows 24’’ of clearance behind the rack and 30’’ of clearance in the front. It is acceptable to require opening the double swing doors to access one side of the rack.

HPA System and Amplifier Modules/Channels Requirements

· The HPA system shall be configured with the following channel count and power-per-channel configuration.

· Threshold: 20 independent channels, each with 1 kW output power.

· Objective: 16 independent channels, each with 2 kW output power.

· Each amplifier module/channel shall meet the following requirements.

· Frequency Range

· Threshold: 3-30MHz

· Objective: 2-45MHz

· Output power per channel

· Threshold: >=1 kW peak envelope power into 2:1 VSWR load

· Objective: >=2 kW peak envelope power into 2:1 VSWR load

· Input Drive levels

· Requirement: 0dBm ± 0.5dB (3-30MHz), 0dBm ± 2.5dB (2-3 MHz and 30-45MHz)

· Reverse Power Handling:

· Requirement: Operate with up 250W of reverse power. Automatic shutdown for reverse power exceeding 250W.

· Duty Cycle:

· Requirement: 100% at peak output power

· Modulation Type:

· Requirement: reproduce CW, AM, FM, pulsed.

· Input Impedance:

· Requirement: 50 ohms, 1.6:1 VSWR Max

· Output Impedance:

· Requirement: 50 ohms

· RF Noise:

· Requirement: <-165dBc/Hz @ peak output level

· Phase Noise:

· Requirement: <-95dBc/Hz at 0.1Hz center frequency offset at peak output power, <-105dBc/Hz at 1Hz center frequency offset at peak power, <-120dBc/Hz at 10Hz center frequency offset at peak power, <-130dBc/Hz at 100Hz center frequency offset at peak power

· Spurious Emissions:

· Requirement: <-110dBc @ peak output level per channel

· Harmonic Levels:

· Requirement: <-20dBc @ peak output level, without additional output filtering

· Temperature Range:

· Requirement: 0◦C-45◦C (Operating), -40◦C-60◦C (Non-Operating)

· Humidity Range:

· Requirement: 0-90% Relative humidity, non-condensing

· Marine environment compatible – resistance to corrosion

· Cooling: acceptable cooling options include both forced air and water/liquid cooling. If using forced air method, air cooling solution shall be via ambient external environmental air circulation, not interior HVAC system.

· Acoustic Noise:

· Threshold: <71dBA SPL per channel when operating at peak output power

· Objective: <65dBA SPL per channel when operating at peak output power

· Power Supply:

· Requirement: The efficiency of each amplifier channel shall be greater than 40%. The noise and modulation products produced by the power supply contained in the final high power RF output shall be >140dB below the carrier.

· Status display:

· Requirement: Each amplifier channel shall have an exterior status display such as a graphical touch screen display with selectable information to include, power output, temperature, bias voltages, current draw, airflow if applicable, forward and reverse power. The information displayed on the screen shall also be available via external Ethernet interface.

· Control:

· Requirement: Electronic microprocessor control internal to amplifier module with 100BaseT Ethernet connection external interface, RJ45 connection. Software shall be provided to monitor and control amplifier.

· Forward and reverse monitoring ports shall be available for each channel. The monitoring point shall be at the final amplifier output, including the output harmonic filter. Patch cables linking the monitoring ports to the rack mounted patch panel shall be phase matched (<0.5 degree at 30MHz).

· Each amplifiers RF output shall be wired to one of the two internal-to-external patch panels with phased matched cables (matched against all other amplifier channels, <0.5 degree at 30MHz).

· The phase variation between each amplifier output shall be less than +/-5degrees of phase when measured at any one frequency. The amplitude variation between each amplifier output shall be less than 0.2dB when measured at any one frequency. The reference planes for measurement are the RF drive ports on the rack mounted patch panels and the output of the harmonic filters.

SOURCE SELECTION SENSITIVE INFORMATION DISCLOSURE LIMITATIONS AS OUTLINED IN FAR 2.10 1 AND 3.104 APPLY

SOURCE SELECTION SENSITIVE INFORMATION DISCLOSURE LIMITATIONS AS OUTLINED IN FAR 2.10 1 AND 3.104 APPLY image1.jpeg