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Summary of Contents for Microhard Systems HP900
- Page 1 Operating Manual HP900 OEM 900 MHz Spread Spectrum Wireless Module Revision 0.4 February 27, 2019 www.microhardcorp.com...
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Page 2: Indemnification
Warranty Microhard Systems Inc. warrants that each product will be free of defects in material and workmanship for a period of one (1) year for its products. The warranty commences on the date the product is shipped by Microhard Systems Inc. Microhard Systems Inc.’s sole liability and responsibility under this warranty is to repair or replace any product which is returned to it by the Buyer... -
Page 3: Hp900 Regulatory Requirements
WARNING: Changes or modifications not expressly approved by Microhard Systems Inc. could void the user’s authority to operate the equipment. This device has been tested with the antennas listed in Appendix A When integrated in OEM products, fixed antennas require installation preventing end-users from replacing them with non-approved antennas. -
Page 4: Co-Location With Cellular Modems
3) EUT with 3 dBi dipole antenna co- located with LTE Data Module SARA-R410M ( FCC ID XPY2AGQN4NNN, IC 8595A-2AGQN4NNN) 4) EUT with 3 dBi dipole antenna co- located with LTE Data Module LE910-NA-V2 ( FCC ID RI7LE910NAV2, IC 5131A-LE910NAV2 ) HP900 Operating Manual... -
Page 5: Table Of Contents
Contents Indemnification ..................................ii Proprietary Rights ..............................ii HP900 Regulatory Requirements ........................iii Co-Location with Cellular Modems ........................iv CONTENTS ................................V GENERAL ................................1 ................................ 1 RODUCT VERVIEW ..............................2 UTPUT OWER EVEL INSTALLATION ..............................3 ..................................3 VERVIEW ............................3... -
Page 7: General
HP900 to interface directly to any equipment with an asynchronous serial interface. ◼ ease of installation and use – the HP900 module uses a subset of standard AT style commands, very similar to those used by traditional telephone line modems. -
Page 8: Output Power Level
While the typical application for the HP900 is to provide a short- to mid- range wireless communications link between DTEs, it can be adapted to almost any situation where an asynchronous serial interface is used and data intercommunication is required. -
Page 9: Installation
3. Installation 3.0 Overview The HP900 complies with FCC part 15 at the modular level for operation in the license-free 902-928 MHz ISM band. This chapter provides guidelines for installing and deploying equipment which incorporates the HP900 module. 3.1 Estimating the Gain Margin... - Page 10 Figure 1 Gain Calculation The power level has been set to 30dBm (1W) on the transmitter, and the receiver sensitivity for the HP900 is -108dBm. System gain would be calculated to be: 30 - 2 + 6 + 3 - 2 + 108 = 143 dB.
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Page 11: Antennas And Cabling
A PCB must be designed that incorporates a 50 Ω trace to a RP- SMA connector for the HP900 to interface to an external antenna. A high quality 50 Ω RF connector, such as a RP-SMA connector, provides proper PCB-to RF-cable transition. - Page 12 • Add GND clearance on buried metal layers below any pad of component present on the RF transmission lines, if top-layer to buried layer dielectric thickness is below 200 μm, to reduce parasitic capacitance to ground Operating Manual HP900...
- Page 13 An example of proper RF circuit design is shown below. In this case, the RF_Antenna pin is directly connected to SMA connectors by means of a 50Ω transmission line, with the recommended design layout. HP900 Operating Manual...
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Page 14: Internal Cabling
RPSMA antenna connector on the application PCB to a reverse TNC bulkhead connector on the chassis of the equipment as shown in Figure . This cable can be purchased from Microhard Systems. Reverse TNC Connector RG316 Cable with RPSMA male... -
Page 15: Installing External Cables, Antennas And Lightning Arrestors
Typically, both ports on surge arrestors are N-female. External Filter Although the HP900 is capable of filtering out RF noise in most WARNING: environments, there are circumstances that require external filtering. Paging towers and cellular base stations in close proximity to the HP900 Direct human contact with the antenna can desensitize the receiver. - Page 16 See appendix A for a list of approved antennas that can be used with the HP900 radio modem. If you require another type of antenna please WARNING: contact Microhard Systems Inc. The HP900 CANNOT be used with Be careful with dBi vs dBd gains any antenna that does not appear in Appendix A.
- Page 17 36dBm with respect to the isotropic radiator. Example 1) What is the maximum power the HP900 can be set to comply with FCC and IC given the following equipment given a Rubber Ducky Ant Gain 2dBi and no cable or connectors in the system? Max EIRP 36dBm Max TX power = EIRP –...
- Page 18 6dBd, 900 MHz Omni Directional Antenna Bluewave, RPTNC Pigtail WARNING: Changes or modifications not expressly approved by Microhard Systems Inc. could void the user’s authority to operate the equipment. This device has been tested with the antennas listed in Appendix A When integrated in OEM products, fixed antennas require installation preventing end-users from replacing them with non-approved antennas.
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