User's Manual
Table Of Contents
- General Information
- Radio Service Software Programming
- Radio System Configurations
- VHF & UHF Receivers and Transmitters
- VHF & UHF Hardware Tuning and Troubleshooting
- VHF and UHF Parts List
- VHF / UHF Receiver Electrical Parts List
- VHF / UHF Receiver Mechanical Parts List
- VHF / UHF Receiver P25 Digital Firmware
- VHF / UHF Receiver and Transmitter Encryption
- VHF / UHF Receiver and Transmitter RSS
- VHF / UHF Transmitter Electrical Parts List
- VHF / UHF Transmitter Mechanical Parts List
- VHF / UHF Transmitter P25 Digital Firmware
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX-P1162
Specication Data Sheets
45
380–406 MHZ TRANSMITTER
PERFORMANCE SPECIFICATIONS
General
Frequency Range: 380–406 MHz
Carrier Frequency Stability: ± 0.5 ppm
Channel Spacing: 12.5, 15, 25 and 30 kHz
Channel Selection: 6.25 kHz
Number of Channels: Preset capability for 2 banks of 16 channels
Compatibility: MT-3 and MT-4 Series Radio Systems; P25 interoperable*
RF Output Power: 0.5 to 6.0W Continuous
Emission Designators: n/a
System Impedance: 50 Ω; Type-N connector
Duty Cycle: 100%; Continuous operation
Undesired Emissions:
(Adjacent Channel Power Ratio)
< -70 dBc, Wide Band Analog
< -60 dBc Narrow Band Analog
< -67 dBc, Digital*
Undesired Emissions:
(Conducted Spurious)
< -70 dBc @ 6.0W RF Output
Intermodulation Attenuation: ≥ 40 dB Analog
≥ 40 dB Digital*
VSWR Protection: < 20:1 VSWR at all phase angles
Operating Temperature Range: -30˚C to +60˚C
Operating Humidity: 95% RH (non-condensing) at +25°C
Operating Voltage: +13.8 VDC Nominal (range +10 to +17 VDC) †
+9.5 VDC Regulated
Transmit Current: < 1.7A @ 2.0W RF Output
< 2.8A @ 6.0W RF Output
Stand By Current: <50 mA (no encryption installed)
<80 mA (with encryption modules installed)
Front Panel Controls: Transmitter Power On (Norm) / Off / Key Tx
Mic Mode: Analog / Digital
Analog and Digital Transmit LED indicators
PTT Time-Out-Timer: Programmable from 15 to 465 sec. (in increments of 15 sec., ± 5 sec.) or
innity (default 300 sec.) using Radio Service Software.
Audio Input: 600 Ω balanced or unbalanced input
(600 Ω or 15k Ω selectable input impedance)
Audio Frequency Response: Pre-emphasis; +1, -3 dB (300 to 3000 Hz)
Audio Deviation Limiting: ± 2.5 kHz Narrow band, ± 5.0 kHz Wide band
Audio Distortion: < 2% THD; 1 kHz tone at 1.5 kHz or 3 kHz deviation
FM Hum and Noise Ratio: ≥ 40 dB Wide Band Analog (0.3 to 3.4 kHz De-emphasis off)
≥ 34 dB Narrow Band Analog (0.3 to 3.4 kHz De-emphasis off)
CTCSS Decode / Encode: Programmable to any of 42 CTCSS tones.
* P25 Digital specications are applicable only for modules with the P25 Digital rmware upgrade.