SINCGARS - Revision history

R4002: /* Background and History */

2025-12-31T23:21:50Z

Background and History

← Older revision		Revision as of 23:21, 31 December 2025
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	The PRC-638 manpack (backpack portable or transportable) radio made by IRET in Italy covers 30.000 MHz to 79.975 MHz in 25 kHz steps, with selector switches for 30 MHz/40 MHz/50 MHz/60 MHz/70 MHz, rotary decade switches for 0-9 and then a selector for 00 kHz, 25 kHz, 50 kHz or 75 kHz. For example, to select the frequency 31.575 MHz, the user would select "3", "1", "5" and then "75" on the radio's panel.		The PRC-638 manpack (backpack portable or transportable) radio made by IRET in Italy covers 30.000 MHz to 79.975 MHz in 25 kHz steps, with selector switches for 30 MHz/40 MHz/50 MHz/60 MHz/70 MHz, rotary decade switches for 0-9 and then a selector for 00 kHz, 25 kHz, 50 kHz or 75 kHz. For example, to select the frequency 31.575 MHz, the user would select "3", "1", "5" and then "75" on the radio's panel.

-	This is very similar in operation to the PRC-25/PRC-77 and VRC-12 (RT-542/VRC, RT-246/VRC, RT-246A/VRC, aux receiver R-442/VRC R-442A/VRC) series of radios. However, on many of the Eastern style radios, there are knobs for each digit, vs. having a knob for MC steps (1 MHz steps) and a knob for KC change (kHz steps, 00, 25, 50 or 75 or 00/50 depending on channel steps). In the example above, a FM radio would have four knobs, the first changing between the 30 MHz, 40 MHz, 50 MHz, 60 MHz, or 70 MHz band, the second changing between 0 and 9, the third changing between 0 and 9 and the last switching between 00, 25, 50 and 75. To select 51.00 MHz, the user would switch the first knob to the "5" position, the second knob to the "1" position, the third knob to the "0" position and the last knob to the "00" position (to show the frequency readout of 51.000 or 51000. In theory, being able to go up/down 10 MHz steps, 1 MHz steps and 100 kHz steps provides the capability for faster frequency changes (frequency agility). In real battlefield conditions, however, the utility of this is debatable at best.	+	This is very similar in operation to the PRC-25/PRC-77 and VRC-12 (RT-542/VRC, RT-246/VRC, RT-246A/VRC, aux receiver R-442/VRC R-442A/VRC) series of radios. The RT-542 and RT-246 VHF FM transceivers and related auxiliary 30-76 MHz receivers combined to make the AN/VRC-12 and AN/VRC-43, the AN/VRC-44, the AN/VRC-45, the AN/VRC-46, the AN/VRC-47, the AN/VRC-48 and the AN/VRC-49.
		+
		+	However, on many of the Eastern style radios, there are knobs for each digit, vs. having a knob for MC steps (1 MHz steps) and a knob for KC change (kHz steps, 00, 25, 50 or 75 or 00/50 depending on channel steps). In the example above, a FM radio would have four knobs, the first changing between the 30 MHz, 40 MHz, 50 MHz, 60 MHz, or 70 MHz band, the second changing between 0 and 9, the third changing between 0 and 9 and the last switching between 00, 25, 50 and 75. To select 51.00 MHz, the user would switch the first knob to the "5" position, the second knob to the "1" position, the third knob to the "0" position and the last knob to the "00" position (to show the frequency readout of 51.000 or 51000. In theory, being able to go up/down 10 MHz steps, 1 MHz steps and 100 kHz steps provides the capability for faster frequency changes (frequency agility). In real battlefield conditions, however, the utility of this is debatable at best.

	Other radios use the same concept - but instead of allowing the operator to select the frequency directly, the switches select a channel number. An example of this would be the RU-2 manpack portable VHF FM radio, which covers 30.000 MHz to 69.950 MHz in 50 kHz steps. The channel selection is made using three selector knobs, A, B and C - which correspond to the 3 digit channel number. Knob A has 8 positions, 0, 1, 3, 4, 5, 6 and 7. Knob B and knob C have 10 positions, the digits 0 through 9. This allows the selection of channel numbers 000 through 799. Channel 000 is 30.000 MHz, channel 001 is 30.050 MHz, channel 002 is 30.100 MHz, channel 003 is 30.150 MHz, up to channel 798 being 69.900 MHz and 799 being 69.950 MHz. The end result is effectively identical, and the operator is provided with a conversion chart to quickly convert the 3-digit channel number to a frequency in MHz.		Other radios use the same concept - but instead of allowing the operator to select the frequency directly, the switches select a channel number. An example of this would be the RU-2 manpack portable VHF FM radio, which covers 30.000 MHz to 69.950 MHz in 50 kHz steps. The channel selection is made using three selector knobs, A, B and C - which correspond to the 3 digit channel number. Knob A has 8 positions, 0, 1, 3, 4, 5, 6 and 7. Knob B and knob C have 10 positions, the digits 0 through 9. This allows the selection of channel numbers 000 through 799. Channel 000 is 30.000 MHz, channel 001 is 30.050 MHz, channel 002 is 30.100 MHz, channel 003 is 30.150 MHz, up to channel 798 being 69.900 MHz and 799 being 69.950 MHz. The end result is effectively identical, and the operator is provided with a conversion chart to quickly convert the 3-digit channel number to a frequency in MHz.

R4002 at 14:58, 3 July 2025

2025-07-03T14:58:42Z

← Older revision		Revision as of 14:58, 3 July 2025
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	[[File:SINCGARS_2.jpg\|200px\|thumb\|left\|Two handheld VHF-FM tactical radios Datron HH7700 30-88 MHz (30.000 MHz to 87.975 MHz or 30.0000 MHz to 87.9875 MHz) in 25 kHz steps, with no frequency hopping capability, the radio below is a vehicle-mounted VHF-FM military tactical radio. The HH7700 radio has the capability to switch to narrowband 12.5 kHz steps, doubling the number of available channels from 2320 channels to 4640 channels]]		[[File:SINCGARS_2.jpg\|200px\|thumb\|left\|Two handheld VHF-FM tactical radios Datron HH7700 30-88 MHz (30.000 MHz to 87.975 MHz or 30.0000 MHz to 87.9875 MHz) in 25 kHz steps, with no frequency hopping capability, the radio below is a vehicle-mounted VHF-FM military tactical radio. The HH7700 radio has the capability to switch to narrowband 12.5 kHz steps, doubling the number of available channels from 2320 channels to 4640 channels]]

-	[[VHF / UHF Radio\|VHF-FM]] tactical radio system, with frequency-hopping and voice encryption/data encryption [[Electronic warfare\|capabilities]]. Operating in the 30.000 to 87.975 MHz frequency band with 25 kHz channel steps. Uses 150.0 Hz CTCSS squelch system. Operates in single-channel (SC) and frequency-hopping (FH) modes for voice and data. Original generation SINCGARS radio such as the RT-1439 VRC set (VRC-87 configuration) and modern radios such as the Harris RT-1523 series offer +/5 kHz and +/- 10 kHz offset frequencies from the standard 25 kHz channels.	+	[[VHF / UHF Radio\|VHF-FM]] tactical radio system, with frequency-hopping and voice encryption/data encryption [[Electronic warfare\|capabilities]]. Operating in the 30.000 to 87.975 MHz frequency band with 25 kHz channel steps. Uses 150.0 Hz CTCSS squelch system. Operates in single-channel (SC) and frequency [[Electronic_warfare\|hopping]] (FH) modes for voice and data. Original generation SINCGARS radio such as the RT-1439 VRC set (VRC-87 configuration) and modern radios such as the Harris RT-1523 series offer +/5 kHz and +/- 10 kHz offset frequencies from the standard 25 kHz channels.

	Single channel mode, also known as fixed frequency, is referred to as [[Militia_Radio_Frequencies#Line_of_Sight_LOS_Range_Estimations_for_VHF.2FUHF_Radios_VULOS\|VULOS]], or VHF UHF Line Of Sight ([[Militia_Radio_Frequencies#UHF_and_VHF_range_handheld_radios_range_line_of_sight_improving_handheld_tactical_voice_radio_range_discussion\|LOS]]). It is a catch-all term for VHF-FM 30-88 MHz, VHF-AM 108-150 MHz, VHF-FM 136-174 MHz, UHF-AM 225-399.975 MHz and UHF-FM [[Military_ISR\|380]]-512 MHz fixed frequency clear (plaintext, or PT) or encrypted (ciphertext, or CT) simplex communications nets, including [[Military_ISR\|low power UHF]] 380-430 MHz intra-squad tactical radios (low power, very short range - also called "Personal Role Radio" or [[Personal_Role_Radio\|PRR]]).. Duplex or half-duplex repeaters (relay, retrans) or retransmission facilities may be used for VULOS nets. Frequencies in the 30.000 to 87.975 MHz range may be used for these nets in conjunction with SINCGARS, UHF SATCOM and UHF aircraft HAVE QUICK [[Electronic warfare\|ECCM]] nets. PRC-148, PRC-152 and similar radios make reference to the VULOS radio net type. See also: PRC-150 HF/VHF radio (1.5-30 MHz SSB and various digital modes, 30-60 MHz [59.999 MHz] FM only. FM radios often have a "deviation" (bandwidth) setting. SINCGARS and fixed channel mode is generally set to 8 kHz deviation (36 kHz bandwidth) at 25 kHz steps. Land mobile settings include 5 kHz deviation (20 kHz bandwidth) and 2.5 kHz deviation (10 kHz bandwidth, regular narrow FM).		Single channel mode, also known as fixed frequency, is referred to as [[Militia_Radio_Frequencies#Line_of_Sight_LOS_Range_Estimations_for_VHF.2FUHF_Radios_VULOS\|VULOS]], or VHF UHF Line Of Sight ([[Militia_Radio_Frequencies#UHF_and_VHF_range_handheld_radios_range_line_of_sight_improving_handheld_tactical_voice_radio_range_discussion\|LOS]]). It is a catch-all term for VHF-FM 30-88 MHz, VHF-AM 108-150 MHz, VHF-FM 136-174 MHz, UHF-AM 225-399.975 MHz and UHF-FM [[Military_ISR\|380]]-512 MHz fixed frequency clear (plaintext, or PT) or encrypted (ciphertext, or CT) simplex communications nets, including [[Military_ISR\|low power UHF]] 380-430 MHz intra-squad tactical radios (low power, very short range - also called "Personal Role Radio" or [[Personal_Role_Radio\|PRR]]).. Duplex or half-duplex repeaters (relay, retrans) or retransmission facilities may be used for VULOS nets. Frequencies in the 30.000 to 87.975 MHz range may be used for these nets in conjunction with SINCGARS, UHF SATCOM and UHF aircraft HAVE QUICK [[Electronic warfare\|ECCM]] nets. PRC-148, PRC-152 and similar radios make reference to the VULOS radio net type. See also: PRC-150 HF/VHF radio (1.5-30 MHz SSB and various digital modes, 30-60 MHz [59.999 MHz] FM only. FM radios often have a "deviation" (bandwidth) setting. SINCGARS and fixed channel mode is generally set to 8 kHz deviation (36 kHz bandwidth) at 25 kHz steps. Land mobile settings include 5 kHz deviation (20 kHz bandwidth) and 2.5 kHz deviation (10 kHz bandwidth, regular narrow FM).

R4002 at 14:57, 3 July 2025

2025-07-03T14:57:50Z

← Older revision		Revision as of 14:57, 3 July 2025
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-	Military tactical radio - [[FM]] tactical radio system '''Single Channel Air-Ground Radio System''', commonly known as SINCGARS "sink-gars", '''[[FM]]''' or '''F'''ox '''M'''ike radio. SINCGARS and FM are used in conjunction with HF-SSB systems, UHF/SHF/EHF SATCOM and other communications systems for tactical military communications purposes. See also: [[Militia_Radio_Frequencies\|militia radio frequencies]] and militia [[Militia_Radio_Frequencies#Militia_Intra-Squad_Radio_Frequencies_Channels_UHF_16-Channel_Radio_Programming_Plan_Militia_Patriot_Inter-Squad_Radio_Frequencies_Channel_List\|intra-squad radio (ISR) frequency list militia patriot tactical short-range UHF ISR UISR UHFISR frequencies]].	+	'''Military tactical radio - combat net radio or CNR''' - [[FM]] tactical radio system '''Single Channel Air-Ground Radio System''', commonly known as SINCGARS "sink-gars", '''[[FM]]''' or '''F'''ox '''M'''ike radio. SINCGARS and FM are used in conjunction with HF-SSB systems, UHF/SHF/EHF SATCOM and other communications systems for tactical military communications purposes. See also: [[Militia_Radio_Frequencies\|militia radio frequencies]] and militia [[Militia_Radio_Frequencies#Militia_Intra-Squad_Radio_Frequencies_Channels_UHF_16-Channel_Radio_Programming_Plan_Militia_Patriot_Inter-Squad_Radio_Frequencies_Channel_List\|intra-squad radio (ISR) frequency list militia patriot tactical short-range UHF ISR UISR UHFISR frequencies]].

	== VHF Tactical FM Land Mobile Air-Ground Military Communications ==		== VHF Tactical FM Land Mobile Air-Ground Military Communications ==

R4002 at 14:56, 3 July 2025

2025-07-03T14:56:50Z

← Older revision		Revision as of 14:56, 3 July 2025
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-	Military tactical radio - FM tactical radio system '''Single Channel Air-Ground Radio System''', commonly known as SINCGARS "sink-gars", '''FM''' or '''F'''ox '''M'''ike radio. SINCGARS and FM are used in conjunction with HF-SSB systems, UHF/SHF/EHF SATCOM and other communications systems for tactical military communications purposes. See also: [[Militia_Radio_Frequencies\|militia radio frequencies]] and militia [[Militia_Radio_Frequencies#Militia_Intra-Squad_Radio_Frequencies_Channels_UHF_16-Channel_Radio_Programming_Plan_Militia_Patriot_Inter-Squad_Radio_Frequencies_Channel_List\|intra-squad radio (ISR) frequency list militia patriot tactical short-range UHF ISR UISR UHFISR frequencies]].	+	Military tactical radio - [[FM]] tactical radio system '''Single Channel Air-Ground Radio System''', commonly known as SINCGARS "sink-gars", '''[[FM]]''' or '''F'''ox '''M'''ike radio. SINCGARS and FM are used in conjunction with HF-SSB systems, UHF/SHF/EHF SATCOM and other communications systems for tactical military communications purposes. See also: [[Militia_Radio_Frequencies\|militia radio frequencies]] and militia [[Militia_Radio_Frequencies#Militia_Intra-Squad_Radio_Frequencies_Channels_UHF_16-Channel_Radio_Programming_Plan_Militia_Patriot_Inter-Squad_Radio_Frequencies_Channel_List\|intra-squad radio (ISR) frequency list militia patriot tactical short-range UHF ISR UISR UHFISR frequencies]].

	== VHF Tactical FM Land Mobile Air-Ground Military Communications ==		== VHF Tactical FM Land Mobile Air-Ground Military Communications ==

R4002 at 19:08, 13 March 2024

2024-03-13T19:08:28Z

← Older revision		Revision as of 19:08, 13 March 2024
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	*VRC-10 39.00 MHz to 54.90 MHz (100 kHz steps, continuous tuning) - RT-68 FM transceiver		*VRC-10 39.00 MHz to 54.90 MHz (100 kHz steps, continuous tuning) - RT-68 FM transceiver

-
-
-	~~== Confirmed 30-88 MHz and 30-50 MHz FM Military Frequencies Outside North America USA ==~~
-	*30.300 MHz FM - Germany Army military comms 150 Hz
-	*30.900 MHz FM - British military comms
-	*31.100 MHz FM - British military comms
-	*32.150 MHz FM - Greek military comms
-	*34.050 MHz FM - British military comms
-	*34.150 MHz FM - British military comms
-	*38.375 MHz FM - Russian military comms
-	*38.400 MHz FM - British military comms
-	*38.525 MHz FM - Russian military comms
-	*38.575 MHz FM - Russian military comms
-	*38.750 MHz FM - Indian Army
-	*40.875 MHz FM - Indian Army
-	*41.700 MHz FM - British military comms
-	*42.400 MHz FM - IDF
-	*45.000 MHz FM - Germany Army military comms
-	*46.450 MHz FM - Italian Military Comms
-	*47.725 MHz FM - German Army military comms

	== Further Reading and Additional Resources ==		== Further Reading and Additional Resources ==

R4002 at 19:08, 13 March 2024

2024-03-13T19:08:18Z

Show changes

R4002 at 14:53, 22 February 2024

2024-02-22T14:53:40Z

← Older revision		Revision as of 14:53, 22 February 2024
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	[[File:SINCGARS_2.jpg\|200px\|thumb\|left\|Two handheld VHF-FM tactical radios Datron HH7700 30-88 MHz (30.000 MHz to 87.975 MHz or 30.0000 MHz to 87.9875 MHz) in 25 kHz steps, with no frequency hopping capability, the radio below is a vehicle-mounted VHF-FM military tactical radio. The HH7700 radio has the capability to switch to narrowband 12.5 kHz steps, doubling the number of available channels from 2320 channels to 4640 channels]]		[[File:SINCGARS_2.jpg\|200px\|thumb\|left\|Two handheld VHF-FM tactical radios Datron HH7700 30-88 MHz (30.000 MHz to 87.975 MHz or 30.0000 MHz to 87.9875 MHz) in 25 kHz steps, with no frequency hopping capability, the radio below is a vehicle-mounted VHF-FM military tactical radio. The HH7700 radio has the capability to switch to narrowband 12.5 kHz steps, doubling the number of available channels from 2320 channels to 4640 channels]]

-	[[VHF / UHF Radio\|VHF-FM]] tactical radio system, with frequency-hopping and voice encryption/data encryption capabilities. Operating in the 30.000 to 87.975 MHz frequency band with 25 kHz channel steps. Uses 150.0 Hz CTCSS squelch system. Operates in single-channel (SC) and frequency-hopping (FH) modes for voice and data. Original generation SINCGARS radio such as the RT-1439 VRC set (VRC-87 configuration) and modern radios such as the Harris RT-1523 series offer +/5 kHz and +/- 10 kHz offset frequencies from the standard 25 kHz channels.	+	[[VHF / UHF Radio\|VHF-FM]] tactical radio system, with frequency-hopping and voice encryption/data encryption [[Electronic warfare\|capabilities]]. Operating in the 30.000 to 87.975 MHz frequency band with 25 kHz channel steps. Uses 150.0 Hz CTCSS squelch system. Operates in single-channel (SC) and frequency-hopping (FH) modes for voice and data. Original generation SINCGARS radio such as the RT-1439 VRC set (VRC-87 configuration) and modern radios such as the Harris RT-1523 series offer +/5 kHz and +/- 10 kHz offset frequencies from the standard 25 kHz channels.

-	Single channel mode, also known as fixed frequency, is referred to as [[Militia_Radio_Frequencies#Line_of_Sight_LOS_Range_Estimations_for_VHF.2FUHF_Radios_VULOS\|VULOS]], or VHF UHF Line Of Sight ([[Militia_Radio_Frequencies#UHF_and_VHF_range_handheld_radios_range_line_of_sight_improving_handheld_tactical_voice_radio_range_discussion\|LOS]]). It is a catch-all term for VHF-FM 30-88 MHz, VHF-AM 108-150 MHz, VHF-FM 136-174 MHz, UHF-AM 225-399.975 MHz and UHF-FM [[Military_ISR\|380]]-512 MHz fixed frequency clear (plaintext, or PT) or encrypted (ciphertext, or CT) simplex communications nets, including [[Military_ISR\|low power UHF]] 380-430 MHz intra-squad tactical radios (low power, very short range - also called "Personal Role Radio" or [[Personal_Role_Radio\|PRR]]).. Duplex or half-duplex repeaters (relay, retrans) or retransmission facilities may be used for VULOS nets. Frequencies in the 30.000 to 87.975 MHz range may be used for these nets in conjunction with SINCGARS, UHF SATCOM and UHF aircraft HAVE QUICK nets. PRC-148, PRC-152 and similar radios make reference to the VULOS radio net type. See also: PRC-150 HF/VHF radio (1.5-30 MHz SSB and various digital modes, 30-60 MHz [59.999 MHz] FM only. FM radios often have a "deviation" (bandwidth) setting. SINCGARS and fixed channel mode is generally set to 8 kHz deviation (36 kHz bandwidth) at 25 kHz steps. Land mobile settings include 5 kHz deviation (20 kHz bandwidth) and 2.5 kHz deviation (10 kHz bandwidth, regular narrow FM).	+	Single channel mode, also known as fixed frequency, is referred to as [[Militia_Radio_Frequencies#Line_of_Sight_LOS_Range_Estimations_for_VHF.2FUHF_Radios_VULOS\|VULOS]], or VHF UHF Line Of Sight ([[Militia_Radio_Frequencies#UHF_and_VHF_range_handheld_radios_range_line_of_sight_improving_handheld_tactical_voice_radio_range_discussion\|LOS]]). It is a catch-all term for VHF-FM 30-88 MHz, VHF-AM 108-150 MHz, VHF-FM 136-174 MHz, UHF-AM 225-399.975 MHz and UHF-FM [[Military_ISR\|380]]-512 MHz fixed frequency clear (plaintext, or PT) or encrypted (ciphertext, or CT) simplex communications nets, including [[Military_ISR\|low power UHF]] 380-430 MHz intra-squad tactical radios (low power, very short range - also called "Personal Role Radio" or [[Personal_Role_Radio\|PRR]]).. Duplex or half-duplex repeaters (relay, retrans) or retransmission facilities may be used for VULOS nets. Frequencies in the 30.000 to 87.975 MHz range may be used for these nets in conjunction with SINCGARS, UHF SATCOM and UHF aircraft HAVE QUICK [[Electronic warfare\|ECCM]] nets. PRC-148, PRC-152 and similar radios make reference to the VULOS radio net type. See also: PRC-150 HF/VHF radio (1.5-30 MHz SSB and various digital modes, 30-60 MHz [59.999 MHz] FM only. FM radios often have a "deviation" (bandwidth) setting. SINCGARS and fixed channel mode is generally set to 8 kHz deviation (36 kHz bandwidth) at 25 kHz steps. Land mobile settings include 5 kHz deviation (20 kHz bandwidth) and 2.5 kHz deviation (10 kHz bandwidth, regular narrow FM).

	Most radios include relay capability (called RETRANS or retransmit in military usage). It is important to note the difference between RELAY and REPEATER operation (modern military VHF FM tactical radios are capable of both). Relay operation involves two radios and two sets of TX/RX frequencies. Repeater operation involves semi-duplex (different TX and RX frequencies) operation that most amateur radio operators are familiar with.		Most radios include relay capability (called RETRANS or retransmit in military usage). It is important to note the difference between RELAY and REPEATER operation (modern military VHF FM tactical radios are capable of both). Relay operation involves two radios and two sets of TX/RX frequencies. Repeater operation involves semi-duplex (different TX and RX frequencies) operation that most amateur radio operators are familiar with.

R4002: /* NTIA Federal and Non-Federal Allocations */

2024-01-23T13:06:39Z

NTIA Federal and Non-Federal Allocations

← Older revision		Revision as of 13:06, 23 January 2024
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	'''For additional information, see the [[11_meter#Legal_Users_of_the_25-30_MHz_Spectrum\|legal users of the 25-30 MHz 11 meter / 10 meter spectrum]] and the [[Business_Radio\|Business Radio]] (Business Band) land mobile radio service page - including the VHF low band [[Business_Radio#VHF_Low_Band_25-50_MHz\|subsection]].'''		'''For additional information, see the [[11_meter#Legal_Users_of_the_25-30_MHz_Spectrum\|legal users of the 25-30 MHz 11 meter / 10 meter spectrum]] and the [[Business_Radio\|Business Radio]] (Business Band) land mobile radio service page - including the VHF low band [[Business_Radio#VHF_Low_Band_25-50_MHz\|subsection]].'''
		+
		+

R4002: /* NTIA Federal and Non-Federal Allocations */

2024-01-23T13:06:15Z

NTIA Federal and Non-Federal Allocations

← Older revision		Revision as of 13:06, 23 January 2024
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	== NTIA Federal and Non-Federal Allocations==		== NTIA Federal and Non-Federal Allocations==

-	For additional information, see the [[11_meter#Legal_Users_of_the_25-30_MHz_Spectrum\|legal users of the 25-30 MHz 11 meter / 10 meter spectrum]] and the [[Business_Radio\|Business Radio]] (Business Band) land mobile radio service page - including the VHF low band [[Business_Radio#VHF_Low_Band_25-50_MHz\|subsection]].	+	'''For additional information, see the [[11_meter#Legal_Users_of_the_25-30_MHz_Spectrum\|legal users of the 25-30 MHz 11 meter / 10 meter spectrum]] and the [[Business_Radio\|Business Radio]] (Business Band) land mobile radio service page - including the VHF low band [[Business_Radio#VHF_Low_Band_25-50_MHz\|subsection]].'''

R4002: /* NTIA Federal and Non-Federal Allocations */

2024-01-23T13:06:05Z

NTIA Federal and Non-Federal Allocations

← Older revision		Revision as of 13:06, 23 January 2024
Line 245:		Line 245:
	== NTIA Federal and Non-Federal Allocations==		== NTIA Federal and Non-Federal Allocations==

-	For additional information, see the [[Business_Radio\|Business Radio]] (Business Band) land mobile radio service page - including the VHF low band [[Business_Radio#VHF_Low_Band_25-50_MHz\|subsection]].	+	For additional information, see the [[11_meter#Legal_Users_of_the_25-30_MHz_Spectrum\|legal users of the 25-30 MHz 11 meter / 10 meter spectrum]] and the [[Business_Radio\|Business Radio]] (Business Band) land mobile radio service page - including the VHF low band [[Business_Radio#VHF_Low_Band_25-50_MHz\|subsection]].

← Older revision		Revision as of 14:58, 3 July 2025
Line 7:		Line 7:
	[[File:SINCGARS_2.jpg\|200px\|thumb\|left\|Two handheld VHF-FM tactical radios Datron HH7700 30-88 MHz (30.000 MHz to 87.975 MHz or 30.0000 MHz to 87.9875 MHz) in 25 kHz steps, with no frequency hopping capability, the radio below is a vehicle-mounted VHF-FM military tactical radio. The HH7700 radio has the capability to switch to narrowband 12.5 kHz steps, doubling the number of available channels from 2320 channels to 4640 channels]]		[[File:SINCGARS_2.jpg\|200px\|thumb\|left\|Two handheld VHF-FM tactical radios Datron HH7700 30-88 MHz (30.000 MHz to 87.975 MHz or 30.0000 MHz to 87.9875 MHz) in 25 kHz steps, with no frequency hopping capability, the radio below is a vehicle-mounted VHF-FM military tactical radio. The HH7700 radio has the capability to switch to narrowband 12.5 kHz steps, doubling the number of available channels from 2320 channels to 4640 channels]]

-	[[VHF / UHF Radio\|VHF-FM]] tactical radio system, with frequency-hopping and voice encryption/data encryption [[Electronic warfare\|capabilities]]. Operating in the 30.000 to 87.975 MHz frequency band with 25 kHz channel steps. Uses 150.0 Hz CTCSS squelch system. Operates in single-channel (SC) and frequency-hopping (FH) modes for voice and data. Original generation SINCGARS radio such as the RT-1439 VRC set (VRC-87 configuration) and modern radios such as the Harris RT-1523 series offer +/5 kHz and +/- 10 kHz offset frequencies from the standard 25 kHz channels.	+	[[VHF / UHF Radio\|VHF-FM]] tactical radio system, with frequency-hopping and voice encryption/data encryption [[Electronic warfare\|capabilities]]. Operating in the 30.000 to 87.975 MHz frequency band with 25 kHz channel steps. Uses 150.0 Hz CTCSS squelch system. Operates in single-channel (SC) and frequency [[Electronic_warfare\|hopping]] (FH) modes for voice and data. Original generation SINCGARS radio such as the RT-1439 VRC set (VRC-87 configuration) and modern radios such as the Harris RT-1523 series offer +/5 kHz and +/- 10 kHz offset frequencies from the standard 25 kHz channels.

	Single channel mode, also known as fixed frequency, is referred to as [[Militia_Radio_Frequencies#Line_of_Sight_LOS_Range_Estimations_for_VHF.2FUHF_Radios_VULOS\|VULOS]], or VHF UHF Line Of Sight ([[Militia_Radio_Frequencies#UHF_and_VHF_range_handheld_radios_range_line_of_sight_improving_handheld_tactical_voice_radio_range_discussion\|LOS]]). It is a catch-all term for VHF-FM 30-88 MHz, VHF-AM 108-150 MHz, VHF-FM 136-174 MHz, UHF-AM 225-399.975 MHz and UHF-FM [[Military_ISR\|380]]-512 MHz fixed frequency clear (plaintext, or PT) or encrypted (ciphertext, or CT) simplex communications nets, including [[Military_ISR\|low power UHF]] 380-430 MHz intra-squad tactical radios (low power, very short range - also called "Personal Role Radio" or [[Personal_Role_Radio\|PRR]]).. Duplex or half-duplex repeaters (relay, retrans) or retransmission facilities may be used for VULOS nets. Frequencies in the 30.000 to 87.975 MHz range may be used for these nets in conjunction with SINCGARS, UHF SATCOM and UHF aircraft HAVE QUICK [[Electronic warfare\|ECCM]] nets. PRC-148, PRC-152 and similar radios make reference to the VULOS radio net type. See also: PRC-150 HF/VHF radio (1.5-30 MHz SSB and various digital modes, 30-60 MHz [59.999 MHz] FM only. FM radios often have a "deviation" (bandwidth) setting. SINCGARS and fixed channel mode is generally set to 8 kHz deviation (36 kHz bandwidth) at 25 kHz steps. Land mobile settings include 5 kHz deviation (20 kHz bandwidth) and 2.5 kHz deviation (10 kHz bandwidth, regular narrow FM).		Single channel mode, also known as fixed frequency, is referred to as [[Militia_Radio_Frequencies#Line_of_Sight_LOS_Range_Estimations_for_VHF.2FUHF_Radios_VULOS\|VULOS]], or VHF UHF Line Of Sight ([[Militia_Radio_Frequencies#UHF_and_VHF_range_handheld_radios_range_line_of_sight_improving_handheld_tactical_voice_radio_range_discussion\|LOS]]). It is a catch-all term for VHF-FM 30-88 MHz, VHF-AM 108-150 MHz, VHF-FM 136-174 MHz, UHF-AM 225-399.975 MHz and UHF-FM [[Military_ISR\|380]]-512 MHz fixed frequency clear (plaintext, or PT) or encrypted (ciphertext, or CT) simplex communications nets, including [[Military_ISR\|low power UHF]] 380-430 MHz intra-squad tactical radios (low power, very short range - also called "Personal Role Radio" or [[Personal_Role_Radio\|PRR]]).. Duplex or half-duplex repeaters (relay, retrans) or retransmission facilities may be used for VULOS nets. Frequencies in the 30.000 to 87.975 MHz range may be used for these nets in conjunction with SINCGARS, UHF SATCOM and UHF aircraft HAVE QUICK [[Electronic warfare\|ECCM]] nets. PRC-148, PRC-152 and similar radios make reference to the VULOS radio net type. See also: PRC-150 HF/VHF radio (1.5-30 MHz SSB and various digital modes, 30-60 MHz [59.999 MHz] FM only. FM radios often have a "deviation" (bandwidth) setting. SINCGARS and fixed channel mode is generally set to 8 kHz deviation (36 kHz bandwidth) at 25 kHz steps. Land mobile settings include 5 kHz deviation (20 kHz bandwidth) and 2.5 kHz deviation (10 kHz bandwidth, regular narrow FM).