Midian Electronics TRC-500 User manual

1
TRC-500
Tone Remote Controller with Motorola’s MDC-1200 ANI Decoding
Manual Revision: 2012-07-27
Covers TRC Firmware Revisions:
1.22 & Higher
Covers Keyboard Firmware Revisions:
3.2 & Higher
Covers Encoder/Decoder Firmware Revisions:
5.0 & Higher
Covers PCB Revisions:
G & Higher

2
TABLE OF CONTENTS
Specifications 3
General Information 4
Hardware Installation 5
Hardware Alignment 7
Jumper Settings 9
Controls & Indicators 10
Operation 12
Product Programming 15
Tone Signaling Formats 25
System Error Messages 27
Theory of Operation 29
Technical Notes 31
Contact Information 31

3
SPECIFICATIONS
Voltage/Current:
Operating Voltage: 18 VDC
Operating Current (standby): 210 mA
Operating Current (RX): 380 mA
Operating Current (TX): 220 mA
RX Inputs:
Input Impedance (RX): 600 Ohms
Compression Threshold: Adjustable to –20 dbm
Compression Range: Not more than 3 db change for 30 db increase above threshold
Speaker Audio Output: 2.0 Watt
Distortion: Less than 3% at full audio
Hum & Noise: 50 db below normal operating level
Frequency Response: Less than 3 db from 300 Hz-3 KHz
Notch Filter Depth: 45 db relative to 1 KHz below compression
TX Outputs:
TX Output: Adjustable to +15 dbm on 2175 Hz
Output Impedance (TX): 600 Ohms
Mic Compression Threshold: Adjustable typically 50 mv
Compression Range: Not more than 3 db change for 30 db increase above threshold
Hum & Noise: 50 db below normal operating level
Notch Filter Depth: 45 db relative to 1 KHz below compression
Mechanical:
Dimensions: 2.875" H x 6.5” W x 8.75" L
Operating Temp (excluding LCD): -30° to +60° C
Default Control Tone Frequencies & Timing:
Function Tone Frequency Level & Duration Function
Tone Default Level & Duration
High-Level Guard 2175 Hz 10 dBm for 120 msec F8 1250 Hz 0 dBm for 40 msec
Low-Level Guard 2175 Hz -20 dBm continuous F9 1150 Hz 0 dBm for 40 msec
Monitor 2050 Hz 0 dBm for 40 msec F10 1050 Hz 0 dBm for 40 msec
F1 1950 Hz 0 dBm for 40 msec F11 950 Hz 0 dBm for 40 msec
F2 1850 Hz 0 dBm for 40 msec F12 850 Hz 0 dBm for 40 msec
F3 1750 Hz 0 dBm for 40 msec F13 750 Hz 0 dBm for 40 msec
F4 1650 Hz 0 dBm for 40 msec F14 650 Hz 0 dBm for 40 msec
F5 1550 Hz 0 dBm for 40 msec F15 550 Hz 0 dBm for 40 msec
F6 1450 Hz 0 dBm for 40 msec F16 2350 Hz 0 dBm for 40 msec
F7 1350 Hz 0 dBm for 40 msec F17 2450 Hz 0 dBm for 40 msec
Encode Formats:
DTMF (0-9, *, #, A, B, C)
5-Tone (CCIR, DZVEI, DDZVEI, EEA, EIA, Eurosignal, MODAT, NATEL, ZVEI)
2-Tone
Pulse Tone (1500 Hz & 2805 Hz)
Decode Formats:
Motorola’s MDC-1200 ANI and Emergency ANI

4
GENERAL INFORMATION
Midian’s TRC-500 is a tone remote controller with Motorola MDC-1200 ANI and ENI display decoding with dialing
capabilities in DTMF, 5-Tone, Pulse Tone and 2-Tone. The TRC uses EIA and Industry standards for monitor,
guard, and F1-F16 function tones. Midian also adds F17 for additional function control when used with Midian’s
TTC-1. The built-in display shows the frequency/function selection, real-time clock and the decoded ANI/ENI with
Alias.
The TRC comes standard with an internal microphone and speaker. A gooseneck microphone (TRC Option A) or
handset and cradle (TRC Option C) are also available. The standard configuration is for a 2-wire and single line
system. A 4-wire option (TRC Option F) or a Line 2 option (TRC Option E) is available for these types of systems.
Midian’s TRC can be used with Midian’s TTC-1, tone remote adaptor, or another manufacturer’s tone remote
adaptor that uses EIA and industry standard F1-F16 function tones.

5
HARDWARE INSTALLATION
Be certain to follow standard anti-static procedures when handling any of Midian’s products.
Getting Started:
The TRC has a number of adjustment potentiometers and configuration jumpers. These have been adjusted and
configured at the factory for a typical installation. However, audio levels should be verified and adjusted (if
necessary) at the time of installation. Also, the configuration jumpers should be inspected prior to installation to
verify that they are in the right configuration. Jumper descriptions appear in the jumper settings section with a
quick reference table. NOTE: The Zener Diode D-605 is installed to reduce the input voltage to regulators U601
and U602. D-605 is operating within specifications however when the TRC is open for adjustment, care should be
used to avoid touching the diode as it can be hot to the touch.
Line Interface
The line interface connector PL1 is a 10-pin RJ-45 style connector in the center of the back panel. A standard 4-
pin RJ-11 cable will plug into the RJ-45 and connect to the center 4-pins that are needed for 2-wire or 4-wire
interfaces. The remaining 6 pins are for use with a telemetry radio or microwave E&M options and for future
interoperability options.
2-Wire & Line 1 Operation: For a single line, 2-wire installation, simply connect pins 5 and 6 (red and green) to
the dedicated line. This is the standard configuration for the TRC. See table 3.1.
Table 3.1
Pin Color 2-Wire
PL1-4 Black Not Used
PL1-5 Red Line 1
PL1-6 Green Line 1
PL1-7 Yellow Not Used
2-Wire with Line 1 & 2 Operation: For a 2-line, 2-wire installation connect pins 5 and 6 (red and green) for line 1
and pins 4 and 7 (black and yellow) for line 2. For this feature TRC Option E must be installed in the TRC.
Remove JP202 and JP203 for proper operation. See table 3.2. Please note that the 4-Wire Option (TRC Option
F) is not available in Line 2 operation.
Table 3.2
Pin Color 2-Wire
PL1-4 Black Line 2
PL1-5 Red Line 1
PL1-6 Green Line 1
PL1-7 Yellow Line 2
Diagram 3.1
1

6
4-Wire & Line 1 Operation: For a single line 4-wire installation, connect pins 4 and 7 (black and yellow) for
receive audio and pins 5 and 6 (red and green) for transmit audio. For this feature TRC Option F must be installed
in the TRC. JP204 should be moved to the 3-4 position. See table 3.3. Please note that the Line 2/Supervisor
Option (TRC Option E) is not available in 4-wire operation.
Table 3.3
Pin Color 4-Wire
PL1-4 Black RX
PL1-5 Red TX
PL1-6 Green TX
PL1-7 Yellow RX
Parallel Remote Operation: When multiple remotes are connected to a single dedicate phone line JP304 must
be installed in the unit furthest from the phone line connection. All remaining units must have JP304 removed.
Diagram 3.2 – Parallel Remote Wiring
Supervisor Operation: When using the supervisor option (TRC Option E), the supervisor TRC is connected to
the line via pins 2 and 3. The remaining TRC’s pins 5 and 6 are connected in parallel to the supervisor’s TRC pins
4 and 7. To enable these remotes, the supervisor relay must be engaged by pressing the * and # keys
simultaneously.
Diagram 3.3 – Supervisor Wiring
Telemetry Radio: Rather than connecting the TRC to a dedicated line to communicate with the tone remote
adaptor, telemetry radios can be used for communication. If connecting to a telemetry radio connect PL1 as
follows to the radio:
PL1-3: PTT Output: Connect to the PTT of the radio. Jumpers JP210 1-2 and JP208 1-2 should be installed.
PL1-6: TX Audio Output: Connect to the mic-hi input of the radio. Install JP205 2-3.
PL1-7: RX Audio Input: Connect to a point in the radio providing flat receive audio. Install JP11 1-2 & remove
JP204.
PL1-9: Battery: 15 volts through a 100 Ohm current limiting resistor (R216).
PL1-10: Ground: Connect to the ground of the radio.
Microwave: Connect the 4-wire audio to the TX and RX sides of the microwave. If the M lead is desired install
JP208 1-2 and JP10 1-2. Connect the microwave’s M lead to PL1 Pin 3 for an open collector to ground. If using
an external relay to control the microwave’s M lead you may use Q205 to provide 12 volts and install JP207 1-2
and JP208 2-3.
PL1-8: External Speaker or PA System
5
TRC
65
TRC
6 5
TRC
6
To Tone
Remote
Adaptor
JP304
Out JP304 Out JP304 In
To Tone
Remote
Adaptor 66
7
4
5
TRC
5 TRC
6 5
TRC
Supervisor

7
HARDWARE ALIGNMENT
The following procedures assume a good quality dedicated line is being used and the tone remote adaptor is already
installed. The alignments are preset at the factory and should not need to be adjusted during installation. However, if an
adjustment is needed, please follow the procedures below.
RX Input Line Level Adjustment:
1. With the dedicated line connected to the TRC, connect a line level meter to the red and green (or yellow & black
with the 4-wire option) in bridging mode. If testing on a bench with no tone remote adaptor available use termination
mode on the line level meter.
2. With the line level meter generating Low-Level Guard Tone at -20 dBm, monitor TP304 with an oscilloscope.
3. Adjust RP306, so that 200 mV p-p is seen at TP304 or 165 mV p-p is seen at TP301. If paralleling multiple remotes,
this alignment should be done with all remotes attached.
TX Output Line Level Adjustment:
1. With the dedicated line connected to the TRC, connect a line level meter to the red and green in bridging mode. If
testing on a bench with no tone remote adaptor available use termination mode on the line level meter.
2. Set RP201 to 90%.
3. Push and hold the SEND key on the TRC to generate the Low-Level Guard Tone.
4. Adjust RP202 so that the line level meter shows the Low-Level Guard Tone at -20 dBm. If paralleling multiple
remotes, this alignment should be done with all remotes attached.
RX Notch Filter Alignment:
1. Generate the 2175 Hz Low-Level Guard Tone to the TRC.
2. Turn RP303 fully clockwise.
3. Monitor TP303 with a Sinadder. The sensitivity of the Sinadder should be adjusted to hear the tone.
4. Adjust RP302 until the tone is at it’s most diminished point.
5. Adjust RP303 until the tone fully diminishes.
6. Repeat steps 4 and 5 until no tone remains.
TX Notch Filter Alignment:
1. Unplug the internal microphone from the TRC, install JP101 1-2 and turn RP102 fully clockwise.
2. Push and hold the SEND key on the TRC to generate the 2175 Hz Low-Level Guard Tone.
3. Monitor TP103 with a Sinadder. The sensitivity of the Sinadder should be adjusted to hear the tone.
4. Adjust RP103 until the tone is at it’s most diminished point.
5. Adjust RP102 until the tone fully diminishes.
6. Repeat steps 4 and 5 until no tone remains.
7. After aligning the TX notch filter, remove JP101 and plug back in the internal or gooseneck microphone.

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Handset Ear Level (TRC Option C Only):
1. With a field radio talking on channel to the TRC, adjust RP304 to a comfortable level.
Motorola MDC-1200 Decode Level Alignment:
1. Transmit a 1500 Hz test tone over the air at approximately 2/3 full system deviation (3.3 kHz wideband, 1.7 kHz
narrowband).
2. Monitor TP501 with an oscilloscope and adjust RP501 for maximum amplitude, so that 700 mV p-p (250 mV RMS)
is seen at TP501.

9
JUMPER SETTINGS
The following table shows the default jumper settings and their function:
Jumper
Number Default Position Description
JP101 Out Install during TX Notch Filter Alignment only
JP201 Out Sidetone for dialing (4-wire option only)
JP202 In Removed when TRC Option E is installed (Line 2/Supervisor)
JP203 In Removed when TRC Option E is installed (Line 2/Supervisor)
JP204 1-2 In – 3-4 Out 2-wire (1-2 In 3-4 Out) or 4-wire option (1-2 Out 3-4 In)
JP205 1-2 In – 2-3 Out Balanced (1-2 In 2-3 Out)/Unbalanced (1-2 Out 2-3 In) Audio
Selection for use with a telemetry radio instead of a dedicated line.
JP206 Out Power with current limit.
JP207 Out Activates Q205 to provide 14 V to external M lead relay.
JP208 Out If JP208 1-2 is installed with JP210 1-2, provides an open-collector
to ground on PL1-3 to PTT a telemetry radio or ground a relay for
an M lead.
JP209 In Always installed unless directed otherwise by Midian.
JP210 1-2 Out – 2-3 Out Install JP210 1-2 with JP208 1-2 to PTT a telemetry radio.
JP301 1-2 In – 2-3 Out Future Use
JP302 Out Handset Audio Feedback. Install only with the TRC Option C if dial
tones and voice in the ear piece are desired.
JP303 Out TX Audio Loading. If less TX audio is needed, install this jumper.
JP304 In 2-Wire RX Audio Termination. If more RX audio is needed, remove
this jumper. This should only be needed if paralleling remotes.
JP305 Out 4-wire option only. RX Audio Loading. If less RX audio is needed,
install this jumper.
JP306 Out 4-wire option only. RX Audio Termination. If more RX audio is
needed, remove this jumper. This should only be needed if
paralleling remotes.
JP307 1-2 Out – 2-3 In With 2-3 installed the volume control switch is the main source of
controlling the handset ear piece audio level. With 1-2 installed and
2-3 removed, the volume control switch does not affect the handset
ear piece audio level and RP304 is the only source of control.
JP308 Out Low impedance audio for external speaker or PA System.
JP309 In Leave In: In for hard mute and out for soft mute
JP401 Out Factory Use Only
JP409 Out Factory Use Only

10
CONTROLS & INDICATORS
Power/Volume Switch: On the right side of the TRC, there is a switch which acts as the power and volume
switch. The switch is in the power off position when turned fully clockwise past the click. Turning the switch
counter-clockwise past the click turns the power on to the volume control. At this point the volume is in the low
position. Turning the switch further counter-clockwise increases the volume.
LCD: The 2-line LCD displays the time and unit ID on the first line and the frequency selection and frequency
alias on the second. When a dialing sequence is performed the second line is cleared and the dialing sequence is
displayed. Channel changes are also shows between parallel remotes.
LED 1 (PWR - LINE/SUP): This LED is a bi-color LED. The LED will glow red when the power is on to the TRC. It
glows orange when Line 2/Supervisor mode is active.
LED 2 (SEND - F1/F2): This LED is a tri-color LED. The LED will glow red during transmit of Freq 1 and orange
during transmit of Freq 2. It glows green when Guard Tone is detected from a parallel tone remote.
FREQ: The FREQ button acts as the frequency select and the function select key. Pressing this key followed by
0-17 will select the associated frequency or function. When using the TRC with Midian’s TTC-1 tone remote
adaptor both frequency and function tones are available. When using the TRC with another manufacturer’s tone
remote adaptor the frequency tones are selectable.
INTER: Pressing the INTER key will allow intercom communications between several connected tone remotes
without transmitting over the radio. When the INTER key is pressed and held, the audio is routed on the line
without the Guard Tone activating the transmitter. Other tone remotes on the same line will hear the audio
automatically. No cross mute is available in intercom mode since there is no Guard Tone present.
MONITOR: Pressing the MONITOR key will allow the user to monitor the channel before pressing the SEND key
to make a call. If a conversation is heard then another co-channel user presently “owns” the channel and should
not be interrupted.
1 ABC 2 DEF 3
GHI
4 JKL 5 MNO 6
PQRS
7 TUV 8 WXYZ 9
MENU
* OPER 0 CLR #
FREQ INTER
MONITOR
SEND
◄SCROLL ►
PWR - LINE/SUP SEND - F1/F2
12:00 ID: 1234
Freq: 01 Fire 1