The stylized “Daniels Electronics Ltd.” and “DE” logo are registered
Canadian and US trademarks of Daniels Electronics Ltd.
The stylized “Daniels Electronics Ltd.” and “DE” logo are trademarks of
Daniels Electronics Ltd.
IM08-MT-4E-TXRX
P1162
Jun 2011
Daniels Electronics Ltd.
Victoria, BC
PRINTED IN CANADA
ii
DOCUMENT CONTROL
DOCUMENT REVISION
DEFINITION
This document has been produced, veried and controlled in accordance
with Daniels Electronics’ Quality Management System requirements.
Please report any errors or problems to Daniels Electronics’ Customer
Service Department.
Daniels Electronics Ltd. utilizes a three-level revision system. This
system enables Daniels to identify the signicance of a revision.
Each element of the revision number signies the scope of change as
described in the diagram below.
1-0-0
Major Revisions:
The result of a major change to
product function, process or requirements.
Minor Revisions:
The result of a minor change to
product, process or requirements.
NOTE
The result of typing corrections or
Editorial Revisions:
changes in formatting, grammar or wording.
Three-level revision numbers start at 1-0-0 for the rst release. The
appropriate element of the revision number is incremented by 1 for each
subsequent revision, causing any digits to the right to be reset to 0.
For example:
If the current revision = 2-1-1 Then the next major revision = 3-0-0
If the current revision = 4-3-1 Then the next minor revision = 4-4-0
If the current revision = 3-2-2 Then the next editorial revision = 3-2-3
The complete revision history is provided at the back of the document.
The user’s authority to operate this equipment could be revoked through
any changes or modications not expressly approved by Daniels
Electronics Ltd.
The design of this equipment is subject to change due to continuous
development. This equipment may incorporate minor changes in detail
from the information contained in this manual.
Operation is subject to the following two conditions: (1) this device may
not cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the
device.
Exposure to radio frequency (RF) energy has been identied as a potential environmental factor that must be
considered before a radio transmitter can be authorized or licensed. The FCC and IC have therefore developed
maximum permissible exposure (MPE) limits for eld strength and power density, listed in FCC 47 CFR 1.1310
and IC RSS-102 Issue 2 Sect 4. The FCC has furthermore determined that determination of compliance with
these exposure limits, and preparation of an Environmental Assessment (EA) if the limits are exceeded, is
necessary only for facilities, operations and transmitters that fall into certain risk categories, listed in FCC 47
CFR 1.1307 (b), Table 1. All other facilities, operations and transmitters are categorically excluded from making
such studies or preparing an EA, except as indicated in FCC 47 CFR 1.1307 (c) and (d).
Revised FCC OET Bulletin 65 (Edition 97-01) and IC RSS-102 Issue 2 provide assistance in determining
whether a proposed or existing transmitting facility, operation or device complies with RF exposure limits. In
accordance with OET Bulletin 65, FCC 47 CFR 1.1307 (b) and RSS-102 Issue Sect 2.5, this Daniels Electronics
Ltd. transmitter is categorically excluded from routine evaluation or preparing an EA for RF emissions and this
exclusion is sufcient basis for assuming compliance with FCC/IC MPE limits. This exclusion is subject to the
limits specied in FCC 47 CFR 1.1307 (b), 1.1310 and IC RSS-102 Issue 2 Sect 4. Daniels Electronics Ltd. has
no reason to believe that this excluded transmitter encompasses exceptional characteristics that could cause
non-compliance.
Notes:
• The FCC and IC’s exposure guidelines constitute exposure limits, not emission limits. They are relevant
to locations that are accessible to workers or members of the public. Such access can be restricted or
controlled by appropriate means (i.e., fences, warning signs, etc.).
iii
• The FCC and IC’s limits apply cumulatively to all sources of RF emissions affecting a given site. Sites
exceeding these limits are subject to an EA and must provide test reports indicating compliance.
RF Safety Guidelines and Information
Base and Repeater radio transmitters are designed to generate and radiate RF energy by means of an external
antenna, typically mounted at a signicant height above ground to provide adequate signal coverage. To reduce
potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent
isotropically radiated power (EIRP) is not more than that permitted for successful communication. The following
antenna installation guidelines are extracted from Appendix A from OET Bulletin 65 and must be adhered to in
order to ensure RF exposure compliance:
Non-building-mounted Antennas:
Height above ground level to lowest point of antenna ≥ 10 m or Power ≤ 1000 W ERP (1640 W EIRP)
Building-mounted Antennas:
Power ≤ 1000 W ERP (1640 W EIRP)
The following RF Safety Guidelines should be observed when working in or around transmitter sites:
• Do not work on or around any transmitting antenna while RF power is applied.
• Before working on an antenna, disable the appropriate transmitter and ensure a “DO NOT USE” or
similar sign is placed on or near the PTT or key-up control.
• Assume all antennas are active unless specically indicated otherwise.
• Never operate a transmitter with the cover removed.
• Ensure all personnel entering a transmitter site have electromagnetic energy awareness training.
For more information on RF energy exposure and compliance, please refer to the following:
1. FCC Code of Regulations; 47 CFR 1.1307 and 1.1310.
2. FCC OET Bulletin 65, Edition 97-01, “Evaluating Compliance with FCC Guidelines for
Human Exposure to Radiofrequency Electromagnetic Fields.”
3. http://www.fcc.gov/oet/rfsafety/.
4. IC RSS-102 Issue 2, “Radio Frequency Exposure Compliance of Radio Communication Apparatus.”
NOTE: The General Information and the Theory of Operation sections are common for all models of
MT-4E Receivers and Transmitters. Information that is specic to individual models will be
identied where relevant.
1
INTRODUCTION
The MT-4E Receiver and Transmitter are FM
radio modules capable of analog operation
in 12.5 kHz (narrow band) or 25 kHz (wide
band) channels. A rmware upgrade may be
purchased to allow P25 Digital operation.
Modular design allows each of the receiver and
transmitter’s internal modules to be individually
assembled and tested, which facilitates
construction, tuning and general maintenance.
The MT-4E Receiver and Transmitter combine
state of the art performance in a compact
modular enclosure for applications ranging from
remote mountain top repeaters to congested
urban radio environments. Each module is
characterized by dependable, low maintenance
performance under the most severe
environmental conditions.
The MT-4E Receiver and Transmitter are
primarily software controlled radio modules,
allowing tuning, programming and maintenance
to be done via software service with few
hardware adjustments required.
P25 Digital Mode
When the P25 rmware upgrade is purchased,
the MT-4E family of receivers and transmitters
may be congured for P25 Digital operation,
or mixed mode operation. In a repeater
conguration, the receiver passes the complete
P25 Digital voice packet directly to the
transmitter so no P25 Digital information is lost.
All P25 specications, operational description
and information contained in this instruction
manual require the P25 rmware upgrade to
function. If the MT-4E Receiver and Transmitter
are purchased without the P25 rmware
upgrade, the radio will program and operate in
analog mode only.
NOTE: This equipment is not to be operated
within the frequency band
406–406.1 MHz unless specically
authorized by the Federal
Communications Commission or Industry
Canada in conjunction with COSPAS /
SARSAT.
The MT-4E series is compatible with all Daniels’
subrack and base station enclosures. It supports
a basic analog interface and may be used in
The receiver and transmitter are capable of decoding and encoding secure communications if a
DES-OFB / AES Encryption Module is installed. To successfully decode or encode a transmission,
the encryption module must be programmed with a valid encryption key using the Motorola KVL 3000
Plus Keyloader in conjunction with a Daniels Keyloader Cable. The Daniels Keyloader Cable plugs
into the front panel RJ45 jack on the front of the receiver or transmitter module.
Consult Keyloader instructions for details on loading a key. A loaded key may be zeroized by pulling
the CLEAR KEYS 1, then the CLEAR KEYS 2 inputs to ground 500 ms apart. Alternately, the
CI-BC-4E Base Controller or Universal Interface Card (UIC) may be used to clear the keys for all
modules in a system with a single key press of the switch marked ZEROIZE KEY. The CI-BC-4E
Base Controller can also be used to control whether the transmitter outputs a secure or a clear signal.
Firmware Upgrades
Receiver and transmitter rmware upgrading is performed with the PC-based rmware ashing
software. A USB Type A to 5-pin Mini-B cable is used to connect the USB port of an IBM-compatible
computer to the USB port on the front panel of the receiver or transmitter module.
Firmware upgrades can be found on the Daniels Electronics Ltd. website at www.danelec.com.
MT-4E Receiver Family Models
Following are the models in the MT-4E Receiver family:
VR-4E150-00-000 UR-4E460-00-000
VR-4E150-A0-000UR-4E460-A0-000
UR-4E380-00-000UR-4E500-00-000
UR-4E420-00-000UR-4E768-00-000
UR-4E420-A0-000UR-4E800-00-000
UR-4E440-00-000UR-4E850-00-000
MT-4E Transmitter Family Models
Following are the models in the MT-4E Transmitter family:
Four channel select lines, CSEL 0 – CSEL 3, from the motherboard are brought into the receiver and
transmitter modules by the 48-pin rear connector, allowing selection of 16 different channels. These
signals are normally pulled low in the receiver and transmitter, but are typically set by jumpers on
the motherboard to select Channel 1 by default. In addition, a bank select input is provided to switch
between Bank A and B, each of which has 16 channels. The Bank select line normally oats high
(+5 V), selecting Bank A, but may be pulled low or high externally to select Bank B.
Channel and Bank Select Line Mapping
The table below shows the relationship between the states of the bank and channel select lines. Note
that the channel select lines follow a binary pattern, but that the binary “0” represents Channel 1.
The Bank A/B select line normally oats high (+5 V), selecting Bank A, but may be pulled low or high
externally via the Bank A/B select line.
NOTE: This manual contains general information about Radio Service Software (RSS). Software
revisions occur regularly. For current RSS versions and instructions, refer to up-to-date help
les on the Daniels Electronics website (www.danelec.com > Products > Software > Radio
Service Software (RSS) > RSS Download Page). Once RSS is downloaded with either the full
or demo version, click Help to access the help les.
Receiver and transmitter programming is performed with the PC-based RSS. A USB Type A to 5-pin
Mini-B cable (included with the software) is used to connect the USB port of an IBM-compatible
computer to the USB port on the front panel of the receiver or transmitter module.
The RSS allows the receiver or transmitter to be programmed for:
The RSS should install automatically once the CD is inserted. If not, run SETUP.EXE, located on
the CD.
NOTE: The receiver and transmitter must be programmed separately.
Once the connections are made, the RSS may be run on the computer and the radio switched on.
The rst time a receiver or transmitter is connected, the USB drivers will need to be installed from the
CD using the Hardware Update Wizard.
To test the connection:
Choose the appropriate module from the Select Device drop-down list.1.
Click 2. Congure on the main screen to open the Receiver or Transmitter Conguration window.
Click 3. Rx ID (or Tx ID).
Click 4. Read.
The serial number, model number, rmware version and last programmed date should appear in the
appropriate elds.
RSS Programming Mode
Programming options are divided into two categories – Global Settings and Channel Settings. When
the receiver or transmitter menu is selected from the main screen, both the global and channel
settings for the current channel are displayed.
The RSS may be used to save a receiver or transmitter conguration to disk. This function allows the
user to save a standard conguration and use it as a starting conguration for all modules. An archive
of congurations from each radio system in operation may also be kept so that replacement radios
can be programmed easily.
NOTE: If the MT-4E Receiver or Transmitter is purchased without the P25 Digital rmware upgrade,
the P25 Digital options will not be available in the RSS.
RSS Service Mode
RSS Service Mode allows tuning, testing and setup of the receiver and transmitter modules. Analog
and P25 Digital test modes, such as Bit Error Rate testing and Test Patterns generation can be
selected by the RSS. Audio Levels, RF Power Output and Reference Oscillator adjustments can also
be performed in RSS Service Mode.
The MT-4E series receivers and transmitters may be congured in a repeater conguration. The
standard way of setting up a repeater system is to connect the receiver to the transmitter through a
Radio Interconnect Cable plugged into the RJ45 CNTL BUS connectors on the front panels of each
radio module. This cable routes analog and digital COR / PTT signals and LVDS Serial Data from
the receiver to the transmitter in both analog and P25 Digital mode. The Radio Interconnect Cable
may be connected directly from the receiver to the transmitter, or may be routed through a Repeater
Control Card.
7
A typical conguration is to set up the repeater to re-transmit an incoming signal in the same mode as
it is received (i.e., normally, you would want a received analog signal to be repeated as analog and a
received digital signal to be repeated as digital). This requires the receiver and transmitter modules to
be programmed in Mixed Mode of operation through the RSS. The repeater may also be programmed
to operate in analog or P25 Digital mode only.
Mixed Mode Repeat operation occurs as follows:
1. The receiver determines whether an incoming signal is analog or digital and asserts either the ANALOG
COR or DIGITAL COR signal line on the front panel RJ45 CNTL BUS connector. LVDS Serial Data is sent to
the RJ45 CNTL BUS connector as well.
2. The COR signal and LVDS Serial Data are transferred over the Radio Interconnect Cable directly to the
transmitter or are routed through a Repeater Control Card.
3. The transmitter senses the incoming ANALOG PTT or DIGITAL PTT signal from the front panel RJ45 CNTL
BUS connector and keys up in analog mode or P25 Digital mode. LVDS Serial Data is routed through the
transmitter for transmission.
An alternate way of setting up a repeater system is to connect the receiver to the transmitter through
an Audio Control Card or Base Controller. These control cards route analog audio and a single
COR / PTT signal from the receiver to the transmitter. This conguration is recommended for analog
repeater systems only.
The receiver and transmitter have no connection between them apart from the audio (Audio Control
Card or Base Controller only), COR / PTT signals and LVDS Serial Data lines. The transmitter does
not get any information from the receiver about which frequency or channel number to key up on.
The receiver and transmitter channel is determined by the state of the channel select lines and bank
select line.
The MT-4E series receivers and transmitters may be congured in a xed (or base) station
conguration with an analog interface. An Audio Control Card or Base Controller is added to the
system for E&M control. For tone remote control of the system, a Tone Remote Adapter is added to
the system along with the base controller. The audio control card or the base controller will also allow
for repeat capability of the system using analog audio as the repeat path.
The base controller is used for system control of encryption and decryption of the P25 Digital voice
messages. Optional decryption or encryption modules are required in the receiver and transmitter
modules.
DIGITAL FIXED (BASE) STATION INTERFACE
The MT-4E series receivers and transmitters may be congured in a xed (or base) station
conguration with a digital interface. A universal interface card (UIC) is added to the system for
MT-4E Receivers and Transmitters employ a high
percentage of surface mount components which
should not be removed or replaced using an
ordinary soldering iron. Removal and replacement
of surface mount components should be
performed only with specically designed surface
mount rework and repair stations complete with
Electrostatic Discharge (ESD) protection.
11
When removing surface mount solder jumpers, it
is recommended to use solder wick braid in place
of vacuum-type de-soldering tools. This will help
prevent damage to the circuit boards.
Alignment of the receiver and transmitter requires the following test equipment or its equivalent.
Power supply – Regulated +9.5 VDC at 2 APhillips PM 2811
Power Supply – Regulated +13.8 VDC at 2 ATopward TPS-4000
Oscilloscope / MultimeterFluke 97 Scopemeter
Current MeterFluke 75 Multimeter
Communications Service Monitor (Analog)Marconi Instruments 2965A or equivalent
Communications Service Monitor (P25 Digital and Analog)IFR 2975
Alignment ToolsDaniels A-TK-04
It is recommended that the radio communications test set be frequency-locked to an external
reference (WWVH, GPS, Loran C) so that the high-stability local oscillator may be accurately set.
Complete Receiver and Transmitter Alignment
A complete receiver and transmitter alignment is performed at the factory and should not be required
under normal circumstances. A large change in receiver or transmitter operating frequency, as
discussed in the next section, or a replacement of major receiver or transmitter sub-assembly
modules, may require a complete realignment operation.