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Jacobs Certus CST-88 User Manual

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Jacobs Certus™ CST-88
User Guide
March 2023

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Summary of Contents for Jacobs Certus CST-88

  • Page 1 Jacobs Certus™ CST-88 User Guide March 2023...

  • Page 2: Table Of Contents

    Size & Mass ................................21 Enclosure Material ..............................21 Mechanical Drawing.............................. 21 Mounting Considerations............................22 Grounding ................................23 Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 1 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.
  • Page 3 SHALL APPLY EVEN IF THE EXPRESS LIMITED WARRANTY AND DOCUMENTATION FOR THE PRODUCT FAILS OF ITS ESSENTIAL PURPOSE. IN NO EVENT SHALL JACOBS BE LIABLE FOR ANY DAMAGES IN EXCESS OF THE PURCHASE PRICE OF THE PRODUCT, REGARDLESS OF LEGAL THEORY, INCLUDING WITHOUT LIMITATION CONTRACT, EXPRESS OR IMPLIED WARRANTY, STRICT LIABILITY, GROSS NEGLIGENCE OR NEGLIGENCE.
  • Page 4 Regulations (EAR) (15 CFR 772) and, as such, may not be exported, disclosed, or otherwise transferred to any non- “U.S.Person” as defined under the EAR (15 CFR 772) without the prior written authorization of the US Government. Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 3...

  • Page 5: Revision History

    Revision History Version Description Date Initial Release 2 March 2023 Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 4 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.

  • Page 6: Introduction

    Intended Audience This document is intended to be used by a VAM that is building products incorporating the Jacobs Certus CST-88. This document focuses on hardware aspects relating to the integration of the Jacobs Certus CST-88 into a VAM product.

  • Page 7: Abbreviations

    Serial Peripheral Interface UART Universal Asynchronous Receiver Transmitter Value-Added Manufacturer VSWR Voltage Standing Wave Ratio Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 6 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.

  • Page 8: Digital Interface

    Pin Locations The Jacobs Certus CST-88’s digital connector is a 50-pin connector with pin numbering that does not follow Samtec’s drawing for its socket connector. The location of pins 1 and 2 are shown in the figure below, as seen looking at the top surface of the Jacobs Certus CST-88.
  • Page 9 I2S_SPKR_SD SPI_CS0 Reserved SPI_CS1 I2S_SPKR_WS RESERVED Reserved RESERVED I2S_SPKR_SCK RESERVED RESERVED RESERVED SIM_CLK RESERVED Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 8 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.

  • Page 10: Pinout Descriptions

    Audio output data 19. Reserved Output No connect 20. I2S_SPKR_WS Output I2S word select Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 9 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.
  • Page 11 UART_A is active 37. XMIT_GATE Output 100k pull-down Transmitter active High = transmitting Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 10 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.
  • Page 12 No Connect 48. RESERVED No Connect 49. RESERVED No Connect 50. RESERVED No Connect Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 11 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.

  • Page 13: Digital Input/Output

    Figure 2.7-1 provides typical power consumptions for the Jacobs Certus CST-88. The power consumption figures in the table assume that the Jacobs Certus CST-88 has clear view of the sky for tracking all available Jacobs satellites. The Jacobs Certus CST-88’s power consumption varies based on factors such as: ▪...

  • Page 14: Power On Control

    The typical power consumption at full transmit and receive in Table 2.7-1 assumes nominal operation in an open sky environment where the Jacobs Certus CST-88’s output RF power varies due to the Jacobs power control loop. The Jacobs Certus CST-88’s power consumption increases as its temperature increases. At 70ºC ambient, its maximum peak power consumption at full transmit and full receive is 35 W.
  • Page 15 Figure 2.8-1: Power On Timing Sequence After a VAM product applies valid and stable EXT_PWR, it can activate the Jacobs Certus CST-88 by asserting the ENABLE signal. In response to ENABLE being activated, the Jacobs Certus CST-88 raises PWR_GOOD when its internal regulator stabilizes and then starts its boot sequence.

  • Page 16: Power Off Control

    Figure 2.9-1: Power Off Timing Sequence Before a VAM product removes EXT_PWR, it must release the ENABLE line or drive it low. When the Jacobs Certus CST- 88 detects that ENABLE is inactive, it performs an orderly shutdown procedure and makes BOOTED inactive. After making BOOTED inactive, the Jacobs Certus CST-88 disables UART_A and makes PWR_GOOD inactive approximately 50 ms later.

  • Page 17: Phantom Powering

    When the local SIM is used, SIM_PD must be active when the Jacobs Certus CST-88 powers up the SIM. If SIM PD goes inactive when the Jacobs Certus CST-88 is active, the SIM is declared invalid, and the Jacobs Certus CST-88 must be reset for the SIM to be recognized.

  • Page 18: Power Saving Features

    The Jacobs Certus CST-88 supports power saving features used to reduce power consumption when the transceiver is idle, which happens when the transceiver is not transferring user data or in a voice call. When the Jacobs Certus CST-88 is saving power, it monitors the Iridium network for “ring alerts” and turns off all unnecessary clocks, including those used to support serial communications with a VAM product.
  • Page 19 In order for Jacobs to better support VAM field trials, a VAM product should support a microSD holder that connects to the Jacobs Certus’ SPI interface using SPI_CS0. The SD holder does not need to be installed in every VAM production unit, but a microSD holder capability should be available for VAM testing and field trials.

  • Page 20: Rf Interface

    Conducted RF Interface The Jacobs Certus CST-88’s RF output power at its connector varies during normal operating conditions as it is subject to dynamic transmitter power control by the Iridium network. As such, the conducted RF power average (measured at the RF connector) across the burst may range between +24 dBm and +40 dBm, depending on the signal type, link conditions and dynamic power control level.

  • Page 21: Esd Protection

    VAM product. Developers are encouraged to review the IEC62368-1 standard for additional details. ESD Protection The Jacobs Certus CST-88 transceiver provides protection of its RF connection against ESD at level 4 of ESD standard EN 61000-4-2:2009, using a human body model direct-contact discharge of 8 kV. Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 20 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.

  • Page 22: Mechanical Specifications

    The enclosure material is an Aluminum 6061-T6511 Alloy with a RoHs Compliant clear chemical film finish. Mechanical Drawing Figure 4.3-1 shows the mechanical dimensions of the Jacobs Certus CST-88. CAD files for the Jacobs Certus CST-88 are also available in a STEP file as per Reference 2.

  • Page 23: Mounting Considerations

    The Jacobs Certus CST-88 has nine mounting holes highlighed red in Figure 4.4-1 with clearance for #8-32 bolts (McMaster 93802A645 or similar) that can be used to secure the transceiver to a VAM product. The Jacobs Certus CST- 88 should be assembled into a VAM product securing the transceiver to the VAM’s enclosure. The VAM product’s mating connector (or PCA with mating connector) should be pushed straight down onto the transceiver’s socket...

  • Page 24: Grounding

    Jacobs Certus CST-88’s power amplifier where the dominate heat is generated. At a minimum, it is recommended that heat sinks on a VAM product contact the Jacobs Certus CST-88 at this location. Depending on a VAM product design and use case scenarios, larger heat sink contact zones may be required.
  • Page 25 Once the Jacobs Certus CST-88 enters a fault mode, a reset or power up is required to recover. Reference 1 describes how to read the status of internal temperature sensors and the notifications that are generated if the Jacobs Certus CST-88 goes into fault mode.

  • Page 26: Environmental

    Environmental The environmental specifications for the Jacobs Certus CST-88 are summarized in Table 5-1. Figure 5-1: Environmental Specifications Parameters Value Operating Temperature Range -40ºC to + 70ºC Operating Humidity Range ≤ 95% RH Storage Temperature Range -40ºC to + 85ºC Storage Humidity Range ≤...

  • Page 27: Regulatory Approvals

    Regulatory Approvals The Jacobs Certus CST-88 transceiver is a regulatory approved module (also referred to as device or equipment within this section) that can be fitted within in a VAM product (or host device). The VAM is responsible for providing the appropriate external connections to ensure that the host device meets all pertinent regulatory requirements (for example, CE, FCC, and IC) and is sold as a regulatory certified product.

  • Page 28: Fcc Class B Digital Device Notice

    EU Declaration of Conformity The EU Declaration of Conformity is available as mentioned in Reference 4. Jacobs Certus™ CST-88 | V00 Proprietary Confidential | 27 Controlled for export under the EAR as set forth in the LEGAL DISCLAIMER AND CONDITIONS OF USE.

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