The Icom FR4100

Icom IC-FR3100/FR4100 Repeater Series
Compact in design, the IC-FR3100/FR4100 will instantaneously retransmit received audio without any noticeable delay and extend the operating range of a radio scheme even further. Designed to enhance coverage of a two-way radio system, the IC-FR3100/F4100 can be added to an existing radio system.
Two versions are available, IC-FR3100 for VHF, for wide area or the IC-FR4100 UHF version for on site systems. Incorporating a large heat sink, cooling fan and high performance power amplifier, the repeater provides a stable 25 Watts output power at a full duty cycle operation.
Wall or rack mount available
With an optional microphone, the repeater can be placed on a desktop as a base station. The optional MB-77 wall mount bracket allows you to set the repeater on a wall. A 19" 3U height rack mount bracket, MB-78, is also available.
Most signaling and codes are standard
Signaling such as CTCSS, DTCS, DTMF and 5-tones, 2-tones encoder/decoder are standard. All signaling is fully programmable.
Single source for integrated solutions
The IC-FR3100/IC-FR4100 series is compatible with any analogue UHF or VHF portable or mobile radio.
Compatible with Trunking systems
The IC-FR3100/IC-FR41000 series has D-SUB 25 pin/modular interfaces for external controllers such as PassPort® and MPT1327.
Built-in AC power supply
The repeater has a built-in 240V power supply unit. For back up the repeater can be connected to an external battery, the repeater will automatically change the power source if the AC power fails.
Internal space for duplexer and isolator
A duplexer allows the use of a single antenna for transmitting and receiving.
Telephone line connector
The repeater has a 4-pin modular connector allowing telephone interconnection.
32 memory channels
The repeater has 32 memory channels. Each memory channel can store a 10-character channel name, wide/narrow (25/12.5 kHz) channel spacing, repeater/base operation etc, as well as frequency settings.
16-digit display
The 16-digit alphanumeric LCD can display a variety of information’s such as channel number, channel name, decoded ID (with 5-Tone and DTMF), etc.
Multiple CTCSS/DTCS tone memories
Each channel has a maximum 16 Receive and Transmit CTCSS and DTCS tone memories that are freely programmable. These memories allow multiple groups to share a single channel.
Built-in 2-Tone, 5-Tone, DTMF encoder and decoder
Four 2-Tone codes, nine 5-Tone codes and 20 DTMF codes are programmable. You can also combine these tones with CTCSS or DTCS tones to control repeater access.
ID transmission function
ID codes or call signs can be sent at the beginning and/or end of the transmission. An ID code can be used for identifying the repeater with the ANI (Automatic Number Identification) function. The ID format is selectable from CW, DTMF and 5-Tone.
5-Tone relay function
In a system that has 5-Tone capability, the repeater relay is opened by the matched 5-Tone signal. The repeater begins relaying the moment it receives the Repeater code. The Station and ID codes are relayed to the intended station.
2-Tone/5-Tone auto TX function
When a matched 2-Tone/5-Tone is received, the auto Transmit function automatically starts the transmission. The external source is selectable from MIC, ACC and Remote lines. With this function it is possible to listen to activity near the repeater itself from a remote location. This for example, allows you to know if unauthorized persons are near the repeater by being able to hear them talking.
Backup functions
An automatic alert function detects an internal error and alerts you with a beep sound or a telephone call. If the Repeater fails from an internal error, the Master repeater will automatically switchover to a sub-unit (Master/Slave switchover).
Optional Voice scrambler unit
The optional voice scrambler units, UT-109 or UT-110 provide secure communication by scrambling voice signals. Up to 32 codes with the UT-109 and 1020 codes (255 codes ïƒâ€â€ÃƒÂ¯Ã¢â€šÂ¬Ã‚ 4 groups) with the UT-110 are available, respectively.
Programmable key assign function
The following functions can be assigned to the [PROG] button. • Priority A • Priority A (Rewrite) • Display select • Lock• High/Low • Wide/Narrow• Call • Call A, B (PMR mode only) • Emergency Single • Emergency Repeat• Scrambler • Special Function 1, 2 • Null
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Radio Base Stations
Central to any radio system is the base station. This can take one of three basic forms -
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Fixed Mobile, which just acts as a standard radio but is fixed in a manned office.
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Talkthrough Base - as a fixed mobile but can be switched into repeater mode.
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Repeater - often at a remote site, permanently repeating the signal via a high aerial to gain an extended range.
The following models can be provided in any of these three configurations:
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The Entel RP500
The RP500 series base station is a high
quality, affordable, low power talk through base
station, ideal for small on-site systems or, with the optional internal battery, remote events.
Model Numbers & Frequency Variants
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VHF LB |
66 - 88MHz |
RP520 |
VHF High |
136 - 174MHz |
RP580 |
UHF |
400 - 470MHz |
RP580-U |
UHF u/band |
450 - 520MHz |

Compact & durable
Constant full transmit
Local control
Versatile
Mains fail backup
Dual or single antenna operation
Dual receiver
PC programmable
Voice scrambler
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Internal Li-Ion battery for transportable or backup use |
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12v power lead
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Desk mic with optional foot switch |
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Fist mic
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Internal duplexer (with VHF Low Band, the duplexer is external)
Wall-mount bracket
Weatherproof enclosure
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Channels |
1 Channel |
Operating Voltage |
External - 110-240VAC or 13.8VDC
Internal - 7.5VDC |
Size (mm - excluding protrusions ) |
210(H) x 113(W) x 260(D) |
Sub audible tone |
CTCSS, DCS with reverse burst |
Channel spacing |
12.5KHz, 20KHz or 25KHz |
Channel steps |
5KHz or 6.25KHz |
Weight (excluding internal duplexer and internal battery)
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5kg |
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Power Output |
VHF - 5 Watts (high) 1 Watt (low)
UHF - 4 Watts (high) 1 Watt (low) |
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