BlueTail Technologies P25RX User Manual

BlueTail Technologies P25RX User Manual

Stand-alone, digital police and fire receiver with control-channel and bluetooth-audio support
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P25RX User Manual
Stand-alone, Digital Police And Fire Receiver
With Control-Channel And Bluetooth-Audio Support
The P25RX allows you to listen to unencrypted law-enforcement, fire department, and other
agency's digital communications publicly available in your area. The P25RX is not an old-
school scanner. The P25RX can receive the control-channel of trunked P25 Phase-1
systems. A single control channel frequency can enable monitoring of all the agencies or talk
groups that utilize that control channel. Some shared systems cover multiple cities and
counties. Configuration can be as simple as entering a single frequency for a control channel
in your area. Because the information is digital, you can also easily program the device with
agencies or talk groups you want to listen to. If you don't want to spend time configuring talk
groups, you can enable the configuration option for "allow unknown talk groups". In this case,
the BTConfig software will auto-collect and store all talk group information with the tag-field
set to 'unknown' for later editing. In the auto-collect mode, encrypted talk groups are
automatically stored and disabled for talk group tag-fields that have the default 'unknown'
description. The P25RX learns about alternate and adjacent control channels over-the-air
automatically and can be configured to roam to these alternate channels on loss of signal.
The integrated national frequency database makes programming primary and alternate
roaming control channel frequencies quick and easy. Unlike many receivers, the P25RX is
designed for excellent performance when receiving data from RF linear simulcast systems
(LSM).
BlueTail Technologies P25RX User Manual

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Summary of Contents for BlueTail Technologies P25RX

  • Page 1 With Control-Channel And Bluetooth-Audio Support The P25RX allows you to listen to unencrypted law-enforcement, fire department, and other agency’s digital communications publicly available in your area. The P25RX is not an old- school scanner. The P25RX can receive the control-channel of trunked P25 Phase-1 systems.
  • Page 2: Table Of Contents

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 Table of Contents 1.0 INTRODUCTION........................2 1.1 F ..........................2 EATURES 1.2 O ....................2 PERATING REQUENCY ANGES 1.3 C .............3 ONNECTOR AND NDICATOR OCATIONS UNCTIONS 1.4 F ..............5 OLLOW GROUP LUETOOTH AIRING UTTON 1.4.1 Single Click - Follow/Unfollow Talkgroup..............5...
  • Page 3: Introduction

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 Introduction 1.1 Features Easy to configure. Stand-alone reception of P25 Phase 1 trunked systems using a control channel. Automatic roaming to alternate control channel towers on loss of signal. Configuration software supported on Windows 7, Windows 10, and Linux.
  • Page 4: Connector And Indicator Locations And Functions

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 1.3 Connector and Indicator Locations And Functions • 3.5mm audio line-out - Line-level audio output. This will drive inputs to powered speaker systems or line-inputs on PC sound cards. This output provides high quality audio.
  • Page 5 BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 • Signal quality Indicator - The signal quality indicator led is key to finding the best orientation, position, and length for the included telescopic antenna. Three colors are used to indicate signal quality (not signal strength).
  • Page 6: Follow Talk-Group / Bluetooth Pairing Button

    (excluding all other talk groups) for a period of time. Press the TG button again with a single click to return to following all enabled talkgroups. The P25RX does not shuffle talk groups when the the follow talk group mode is active.
  • Page 7: Quad Click - Start Bluetooth Firmware Bootloader Update

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 1.4.4 Quad Click – Start Bluetooth Firmware Bootloader Update In this mode, the signal led flashes slowly between blue/red. A single click exits this mode. Please see section 5.2 for more information on updating the Bluetooth firmware.
  • Page 8 Doc Date: 12/18/2020 p25rx. For Windows this should be located in the “Documents/p25rx” directory. On Linux, “/home/username/p25rx/”. If you don’t want the mp3 files to be created, you can turn this functionality off in the “PC Audio Tab”. Page 7 Of 32...
  • Page 9: P25Rx Configuration Settings

    • Control Channel Frequency (Primary) The control channel frequency determines the frequency the P25RX uses for a control channel when it first powers up. It will continue to use this frequency for control except when roaming is enabled and the signal is not available.
  • Page 10 • Allow Unknown Talk Groups When this option is selected the P25RX device will attempt to listen to any active talk groups as reported by the control channel. The system-id, talk- group-id in the <talk group editor> will automatically be populated with the talk group set to ‘enabled’.
  • Page 11 Shuffle Control Channels After xx seconds Of Silence This option is only available when <Enable Roaming> is selected. When set to a positive value, the P25RX will switch to a new control channel if there is no voice activity after xx seconds. This option is intended to prevent a situation where you get stuck monitoring a control channel that has little to no voice activity.
  • Page 12: Frequency Programming

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 2.5 Frequency Programming The BTConfig software contains an integrated frequency database to aid locating P25 Phase 1 control channels in your area. The following map depicts approximate locations of registered fixed-location sites with emission designators that match known P25 systems (Phase 1 and Phase 2).
  • Page 13 BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 • Zip code, City/State Search Enter the search distance in miles and your zip code or city/state information and press search. Highlight the frequencies using the mouse. Ranges can be selected with shift-left-click or ctrl-left-click.
  • Page 14 • Set Selected Frequency As Primary This option configures the P25RX to use the selected frequency as the primary control channel frequency. This function is equivalent to entering the primary control channel frequency and pressing <Write Configuration> in the P25RX Configuration tab.
  • Page 15: Talk Group Editing

    Enable Selected / Disable Selected These buttons allow you to enable / disable all selected talk groups. • Read Talk Groups Read the contents from the P25RX flash memory for display in the talk group editor form. • Write Talk Groups Write the current state of the talk group table to the talk group flash area of the P25RX device.
  • Page 16 BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 • Make Backup (.tgp file) This option will create a backup file of current contents of the talk-group flash. The file can be used to restore the contents of the talk-group flash.
  • Page 17: Talk Group Logging

    The control channel frequency will normally be the primary frequency that the P25RX is configured for, but may also be an alternate or adjacent control channel if roaming is enabled. Most of the same information is also logged in the 24-hour “recmeta”...
  • Page 18: Audio Configuration For Pc Speaker Playback

    When selected, mp3 audio files are generated during voice activity in individual files with a 24-hour time stamp. The mp3 files are only recorded during periods of non-silence. Windows users will find these files in “Documents/p25rx”. Linux users will find them in “~/p25rx”. • AGC Target Volume (PC Speakers) This level determines what the target level for the automatic-gain-control is configured for during voice activity.
  • Page 19: Monitor Mode

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 volume more consistent for various speakers, equipments, etc. • Initial Master Volume Via USB On some systems this may have no effect. On others, this will determine what the volume level is for PC audio output when first starting the BTConfig software.
  • Page 20: Antenna Related Information

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 3.0 Antenna Related Information Telescopic Antenna Included With The P25RX (omni-directional) MANF Unbranded Model DQZH-006 Desc Replacement 450 mm 6 Sections Telescopic Antenna SMA male 360° This antenna is good for UHF reception. If you need VHF support, you will likely Coverage need to find a different antenna.
  • Page 21: Adjusting Telescopic Antenna Length

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 3.1 Adjusting Telescopic Antenna Length Frequency Recommend Length 850 MHz 310 mm 750 Mhz 352 mm 450 Mhz 317 mm This table is a suggestion for something to start with. You should experiment with different lengths, orientations, and positions.
  • Page 22: Usb Connection Is Unstable / Connector Feels Loose

    Something went wrong during a firmware update. Maybe power was lost? Now the P25RX SIG and TG leds are flashing rapidly at a constant rate. Don’t worry, the leds indicate that the device is in bootloader mode. Solution: Re-start the BTConfig software.
  • Page 23: Bluetooth Module Firmware Update

    If you are using Windows, the Doayee ESP32 DFU Tool can be used to perform the Bluetooth firmware update. https://github.com/doayee/esptool-esp32-gui/ 1. For the “Flash App”, select the P25RX Bluetooth firmware file, shown here as bluetooth_fw_2020-03-13.bin. Leave Flash Partition and The Bootloader blank. Do not press “Erase ESP”.
  • Page 24: Bluetooth Compatibility

    Bluetooth speaker (sink) device may be compatible with the Bluetooth audio capability of the P25RX even if it is not listed here. Note that firmware versions, etc are not available for any of the listed devices.
  • Page 25 BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 Bluetooth Speakers Tested: BRAVEN, Model 600 DOSS, Model: SoundBox Touch Marley, Model: EM-JA006-MI LETSCOM, Model: H10 Headphones (aka 100-Hr Headphones) SENSO, Model: activbuds s-250 Anker, Model: Soundcore – JBL, Model: Xtreme...
  • Page 26: Receiver Technical Specifications

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 Receiver Technical Specifications All specifications given for operating temperature of 25C unless otherwise specified. Specifications are subject to change. Parameter Typical Unit Condition Input Voltage 4.75 5V USB Power (Vusb)
  • Page 27 BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 Parameter Typical Unit Condition Conducted Fvco=3.144 GHz Fc = 131 MHz leakage,Fvco =3.144 GHz Conducted Fvco=3.084 GHz Fc=771.125MHz leakage,Fvco =3.084 GHz Conducted <-140 Fc = 131 MHz LO leakage Fc = 172 MHz No leakage Fc = 451.125 MHz...
  • Page 28: Bluetooth Transceiver Technical Specifications

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 Parameter Typical Unit Condition Synchronizer Polyphase / PLL Spurious < -85 dBm To 11 GHz Max RF Front-end is protected input power from ESD. level 8.0 Bluetooth Transceiver Technical Specifications...
  • Page 29: P25 Trunking And Conventional Messages Decoded

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 devices stored. 9.0 P25 Trunking And Conventional Messages Decoded P25 Phase-1 Voice and Trunking channels 4800 sps, 9600 bps rates, 12.5 kHz channels Trellis FEC, crc16, crc32, BCH, Golay message checks / FEC are implemented.
  • Page 30: Credits

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 MFID Specific: • Supports 0x90 Patched Talk Group Monitoring 10.0 Credits The P25RX firmware was inspired by portions of the following projects: https://github.com/jgaeddert/liquid-dsp https://github.com/szechyjs/dsd https://github.com/szechyjs/mbelib https://github.com/uwarc/dsd-dmr https://github.com/osmocom/op25 (Our partial port of TDMA to C can be found...
  • Page 31: Document History

    BlueTail Technologies User Manual, Software Release 2020-04-26 Doc Date: 12/18/2020 11.0 Document History 2020-03-02 T.E. Rev 0 Document creation. 2020-07-21 T.E. Update channel bw spec, add MFID Specific, Honda CRV 2017 AVRC 2020-08-24 T.E. Update ACRR specs 2020-09-14 T.E. Update Credits Section.

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