Astro25 Series Radios

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Motorola Astro25 Series
Market Public Safety
Release Date 2002
EOL Date 2013
Supported Features Conventional Analog
Conventional P25
Motorola Type II Trunking
P25 Phase 1 Trunking

The Astro25 series of radios are public-safety and commercial radios capable of digital P25 conventional and trunking operation. The series was introduced in 2002, and was declared end-of-life in 2013, with depot services continuing until 2018.

Models in Line

Portable Radios

Mobile Radios


Flashport Options

Pulled from

Flashcode Description
Q806 Astro IMBE Digital Operation
H14 Enhanced Digital ID Display
Q52 Federal Government FPP
H869 Hardware Multikey Encryption
Q498 Hardware Multikey Encryption with OTAR
H43 Trunked Remote Monitor / Radio Trace
H46 Trunked One Touch Status Message
Q507 12.5kHz FCC Mandate
G996 Over the Air Provisioning
H35 Conventional Systems Operation
H02 Encrypted Tactical Inhibit
H37 Smartnet Systems Operation
H38 SmartZone Systems Operation
G857 FDNY Emergency RX/TX Tone Set
Q369 Inter-system Roaming RSSI
H04 Conventional Tactical Rekey
H345 Astro25 Radio Authentication
Q352 User-definable Soft ID
Q947 APCO Packet Data Interface
Q241 Analog-only Operation
Q53 FCC FPP / Radio Cloning
Q387 Conventional Voting Scan
Q173 SmartZone Omnilink Multizone Operation
Q182 Enhanced Radio Control Protocol
Q361 Astro25 9600baud Trunking
Q445 Fireground Accountability Software
Q446 Fireground Voice/Channel Announcement
Q667 ADP Software Encryption

AN vs BN Radios

Several radios in the Astro25 line are considered "AN" or "4-meg" radios and contain a smaller flash rom chip (4 megabyte vs 8 megabyte) and are more limited in firmware and feature support. Earlier models of the XTS2500 and the Astro Spectra Plus are considered AN radios and are limited to the firmware version specified below.


The latest firmware (as of 12/21/2016) is R20.50.08 for 8-meg BN radios and R09.00.41 for 4-meg AN radios.

Audio Enhancements

Analog and digital audio is processed by the audio DSP before it is sent through the RF section and transmitted. The default settings are fine, and most people will have no complaints with the quality of audio from these radios. However, as found through testing and tweaking by members of, there exists a much better setting for Astro25 radios that can make the transmitted audio from these units sound even better. These audio settings can be found in the Radio Configuration -> Radio-Wide -> Tx Audio Control Per Mode section of CPS.

The settings are as follows:

  • Internal Mic: All AGC Checked
  • External Mic: All AGC Checked
  • AGC
    • Output: -3
    • Total: 12
  • Noise Suppression: Checked
  • Attenuation Level: Advanced

Text Messaging Service


Astro25 radios program using the Astro25 Portable and Mobile CPS Packages. The portable version of CPS supports the XTS2500, XTS4000, and XTS5000. Astro25 Mobile CPS supports the Astro Spectra Plus, XTL1500, XTL2500, and XTL5000.

Amateur Use & Bandsplits

If you have a radio whose bandsplit is outside the amateur bands (a UHF-R2 "S"-split radio for the 450-520 MHz band would be an example) you must modify the CPS executable to allow the software to accept frequencies which are out of band for the model. This is done using the Hex-edit Method which works for many CPS distributions, and detailed information can be found on the information page.

All Astro25 radios excluding the Astro Spectra Plus will tune to all frequencies in the amateur bands without issues. The Astro Spectra Plus VCO will not lock on some frequencies far from its rated band and requires a hardware mod to allow it to lock properly at these frequencies.

Single-Zone FPP Setup

Contrary to other reports, it is possible to set up a radio running BN firmware (R10+) for only a single zone of FPP channels, as opposed to 16 zones with 16 channels each. The way to do this is not immediately obvious however, as it may seem like all zones are locked as FPP only. The "gotcha" here is that any FPP zone must be preceded by only other FPP zones. I don't know why Motorola decided to do it this way, but you can't just take any zone in the middle of the codeplug and make it FPP or non-FPP.

Starting with a codeplug that has all 16 zones set up for FPP (meaning you also have 128 personalities - yikes), the procedure to get to a single FPP zone is as follows:

  1. Start from zone 16. You should be able to uncheck the "FPP Zone" field. Once you acknowledge the warnings and this is done, the 16 personalities assigned to that zone should be deleted and the codeplug structure will have been reopened.
  2. Now you should be able to delete zone 16.
  3. Follow the above procedure for the remaining 14 zones (zones 2-15)
  4. You should be left with a single FPP zone and 16 un-deletable conventional personalities. Configure these however you like per your FPP preference.

15+1 Trunking Scan

For Astro25 CPS R20.00 and R20.01

CPS Hex Offset Original Value New Value
Portable 0x009301A1 0A 0F
Mobile 0x009E4D51 0A 0F

Make these changes to the PatMob or PatPort executable files using your favorite hex editor.

Astro25 Tuner Virtual Com Ports

Astro25 Tuner is known to have issues with reading & writing with higher COM port numbers. Ports above 20 appear to cause issues and give errors such as "Read Radio Failed." If you encounter issues, try lowering the com port number of your virtual com port.