Motorola Gr300 Zr310 Community Repeater 6880902z68 C Manual

							 
Section 4 
Theory of Operation 
TPL Encoding  
Two signals are used for TPL generation: 
• Clock frequency at the exact TPL rate from the microprocessor  
• Clock frequency at 64 times the TPL rate from the timer module  
These signals are fed into a switched capacitor low pass filer U17, then sent to the transmitter.
 
DPL Encoding 
For generating DPL signals, the microprocessor sends the digital code out its pin 9. Data inversion is done inside the microprocessor if 
required. The timer module produces a high frequency clock signal that is fed into the low pass filter U17. Operation is very similar to TPL 
encoding described above. 
Beep Tone Encoding 
Timer U15 generates progress tones (Morse ID, warning beeps, etc). Square wave output is filtered and summed at the transmit audio 
junction U11D, then it passes through the output buffer amp to the transmitter audio input at P2-2. 
Squelch/Repeater Audio 
The repeat audio is passed through input unity gain stage U18B, the audio hi-pass filter U11 and U11A to remove the TPL/Digital encode, 
de-emphasized by the R29/R30/C34 network and finally to squelch gate. 
U12B and U12C. The microprocessor controls the squelch gate. The repeat audio is summed at the transmit audio junction U11D, then 
passes through the output buffer amp to the transmitter audio input at P2-2
 
CSQ Input 
From the 8 or 16 channel GM300 radio, U4B and U4F are used to select the CSQ input connection and polarity. The COR logic signal is 
presented to the microprocessor input port pin 20. 
 
 
 
 
 
 
 
 
 
 
 
March, 1993  6880902Z68-O  Section 4-1 
						

							 
Section 5 
Maintenance 
Overview 
This section contains information and procedures that will enable the technician to proform preventive maintenance and troubleshooting 
techniques on the ZR310 Community Repeater Panel. Fault isolation and component-level troubleshooting are not covered in the section. 
Preventive Maintenance 
Preventive maintenance of the ZR310 consists of: 
• Visual inspection  
• Periodic cleaning  
• Checks using diagnostic commands entered via the DTMF keyboard
  
Visual Inspection 
Check that external surface of the equipment are clean, that connecting cables are not damaged, and that connections are firm. A detailed 
inspection of the interior electronic circuitry is not needed or desired. 
Cleaning 
Periodically clean smugges and grime from the exterior housing. Use a soft, non-abrasive cloth moistened in a mild soap and water solution. 
Rinse the surface using a second cloth moistened in clean water. 
Diagnostic Commands 
Refer to Programming section, Diagnostic Commands. 
Disassembly 
In order to inspect the cable and other components, and to remove the top cover, you must remove the ZR310 from the GR300 housing. 
Complete the steps in paragraphs 3.1 and 3.2 to accomplish this. 
Removal 
To remove the ZR310 from the repeater housing, perform the following steps: 
1. Place the GR300 power switch to off and unplug the ac line from the ac supply outlet. 
2. Using a T15 Torx screwdriver, remove the four M3.5x0.6x6 taptite screws (3) that secure the fan assembly to the 
repeater housing. 
3. Remove the fan assembly (1) and rest it on top of the repeater housing.
 
 
 
 
 
 
 
 
 
 
 
 
March, 1993  6880902Z68-O  Section 5-1 
						

							 
Section 5 
Maintenance 
 
NOTE 
In order to have enough room to move the fan 
assembly around and to remove the ZR310, you will 
have to cut the cable tie wrap. Make sure that you 
obtain another cable tie wrap for use when 
reassembling the GR300.
 
4. Using a T25 torx screwdriver, remove the two M5x0.8x8 machine screws that secure the ZR310 to the repeater housing. 
5. Remove the ZR310 from the repeater housing. 
6. Disconnect the transmit and receive radio repeater cables from the transmit and receiver connectors.
 
Top Cover Removal 
To remove the top cover from the ZR310 for inspection of components and to make necessary adjustments, perform the following steps. 
1. Using a #1 Phillips screwdriver, remove the four #4-40x3/16 flathead machine screws. 
2. Remove top cover.
 
Troubleshooting 
There are two forms of troubleshooting: 
• Finding problems with the ZR310 system: operations. The troubleshooting charts provided in Table 2-2 will aid in resolving these 
system issues.  
• Repair of a defective ZR310. An experienced technician with the commonly available test equipment, the schematic diagram 
located in the back of this manual and the PC overlays should have no difficulty finding the problem area and faulty component(s).  
The ZR310 schematic diagrams provide the circuit detail for isolating malfunctioning components. [The troubleshooting charts provides....] 
Before proceeding with troubleshooting, scan Table 5-1 to determine if you can solve the existing malfunction. By reading this information, 
you could save valuable time by isolating the circuit where the faulty component os located.
 
Problem/Indication Possible Solution 
400Hz beep just before 
transmit radio unkeys Memory problem 
Memory automatically reset 
to default positions At reset/power: > 15 errors detected 
Unit fails  Reset unit: send DTMF digit from 
mobile/handheld radio to repeater site for 
> 15 seconds 
ZR310 does not detect TPL 
tones Carrier LED is off 
 
 
 
 
March, 1993  6880902Z68-O  Section 5-2 
						

							 
Section 6 
Programming 
Overview 
This section contains information and procedures that allow the technician to program the ZR310. 
You can program the ZR310 in the following ways: 
• Motorola RIB compatible interface, using a computer running Motorola radio service software (RSS) designed for the ZR310  
• DTMF over the radio channel (over-the-air) from a mobile, base station, or handheld  
• DTMF from a telephone plugged into the programming jack on the front of the ZR310  
• ZR310 monitor program via RS232 Communications Program
  
Programming Via Radio Service Software (RSS) 
We recommend that you program the ZR310 using a PC that runs the Motorola Radio Service Software (RSS), because it is the easiest 
programming method. Using this software allows you to access the programmable features of the ZR310 from user-friendly screens on the 
PC. You can archive the final configuration for safekeeping or later examination. 
The programming port on the ZR310 is hardware compatible with the Motorola RIB. The RSS will prompt the system installer to plug into 
the ZR310 so that the configuration can be read or written to the ZR310.
 
Getting Started 
At the Main Menu: 
1. Press F3 (Get/Save) 
You will see the Get/Save Screen, Radio Mode (Figure 6-1). 
We recommend that the radio be programmed in repeater mode. To begin programming in repeater mode:
 
 
Figure 6-1. Get/Save Screen, Radio Mode 
 
 
 
 
 
March, 1993  6880902Z68-O   Section 6-1 
						

							 
Section 6 
Programming 
 
2. Press F6 to change to repeater mode. 
You will see the Get/Save Screen, Repeater Mode (Figure 6-2)
 
 
Figure 6-2. Get/Save, Repeater Mode 
Programming the Repeater 
1. From the Get/Save Menu, Press F2 to read the repeater. 
You will see the screen in Figure 6-3. 
You have two options: to read the repeater, or to designate it as a generic. You may need to use the generic designation if the option board is 
not physically accessible (i.e. programming a replacement radio). 
To read the repeater: 
1. Connect the programming cable to the repeater. 
2. Frees F2 to continue. 
To designate the repeater as generic: 
1. Press F10 to abort
 
 
Figure 6-3. Read Repeater Screen 
 
 
March, 1993  6880902Z68-O  Section 6-2 
						

							 
Section 6 
Programming 
Reading the Transmitter Radio 
After reading the repeater, you will see the screen in Figure 6-4. 
 
Figure 6-4. Read Transmitter Screen 
You have two options: to read the transmitter, or to skip it. 
To read the transmit radio: 
1. Connect the programming cable to the transmitter. 
2. Press F2 to continue. 
To skip the transmitter: 
1. Press F10 to abort. 
If you choose to read the radio, and it has previously been programmed in radio mode, you will see the screen in Figure 6-5. 
NOTE 
Figure 6-5 is for your information only. It may indicate 
that the wrong radio was read. 
If custom settings have previously been programmed for the radio, you will see the screen in Figure 6-6. 
 
 
 
 
 
 
 
 
March, 1993  6880902Z68-O  Section 6-4 
						

							 
Section 6 
Programming 
 
 
Figure 6-6. Non-Default Information Warning 
To allow all programming information to reset to default settings: 
1. Press F2 to continue. 
CAUTION 
To keep custom programming, you must use radio 
mode. If custom settings have previously been 
programmed for the radio, you will see the screen in 
Figure 6-6. Programming in repeater mode resets all 
custom accessor y information to its default settings. 
Pressing F2 (Continue) will overwrite any custom 
programming. 
Reading the Receiver 
After reading the ZR310 option board and the transmitter, you will see the screen in Figure 6-7. 
 
 
Figure 6-7. Read Receiver Screen 
 
 
 
 
 
 
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Section 6 
Programming 
 
You have two choices: to read the receiver, or to skip it 
To read the receiver: 
1. Connect the programming cable to the receiver. 
2. Press F2 to continue. 
To skip the receiver: 
1. Press F10 to abort. 
As with the transmitter, if the radio has previously been programmed in radio mode, the warning screens in Figure 6-5 and Figure 6-6 may 
appear.
 
Configuring the System 
From the Main Menu: 
1. Press F4 (Change/View). 
2. Press F2 (Radio/Wide). 
You will see the screen in Figure 6-8.
 
 
Figure 6-8. ZR310 Configuration Screen 
Table 6-1 lists the functions you can perform from within the ZR310 Configuration Screen. 
 
 
 
 
 
 
March, 1993  6880902Z68-O  Section 6-6 
						

							 
Section 6 
Programming 
 
Table 6-1. Command Key Function 
Command Function 
F1=HELP  Get specific help for highlighted field 
F2=GOTO USER Choose a user number to display (TPL=1-50; 
DPL=51-70) 
F3=PREVIOUS 
USER Go to previous active user (both enabled and 
reserved users are active) 
F4=NEXT USER Go to next active user (both enabled and reserved 
users are active) 
F5=PRINT 
SCREEN Print contents of screen. 
F6=VIEW ALL  View user summary screens 
F7=DELETE USER  Delete currently displayed user from active list. 
F8=ADD USER  Add new user to active list 
F10=EXIT  Go to previous menu (Change/View) 
Table 6-2 lists other keys and their general function. 
Table 6-2. Other Key Functions 
Key Function 
ESC  Exit Main Menu 
Tab/Enter/Return Accept data currently in field and move prompt 
forward one field 
Shift + Tab Accept data currently in field and move prompt 
backward one field 
Up / Down  Arr ow Scroll through selections or increase/decrease 
current relative value. 
Left/Right Arrow  Move cursor left/right one space 
Back space Erase current character in field and move cursor 
left one space 
Page Up/Page 
Down Display previous/next page of information on 
screen 
 
 
 
 
 
 
 
 
March, 1993  6880902Z68-O  Section 6-7 
						

							 
Section 6 
Programming 
 
From the ZR310 Configuration Screen, you may set the programmable features. Programmable feature in the ZR310 are divided into three 
categories: 
• System Programmable Fields  
• User Programmable Fields  
• Diagnostic Tests
  
System Programmable Fields 
The following subparagraphs describe the system commands available for the ZR310. 
Program Mode Access Code 
The program mode access code is a number between 1000 and 32000. 
Morse ID interval, Speed, and Frequency 
You can program the Morse Code station identification in frequency, interval and speed. The following table outlines the programmable 
range and the default settings of each. 
Table 6-3. Station ID Programming
 
   Programmable Range  Default 
Frequency 400-2000Hz 1200Hz 
Interval 1-99  15 Min 
Speed  4-25 wpm  22 wpm 
Each user on the ZR310 has its own independent station ID timer that is accurate to one second per interval. When the station ID is sent, the 
timer is reset. The call is transmitted on the first dispatch message after the timer has expired. 
During normal dispatch, the minimum character speed will be 15 wpm. This allows the List functions (using Morse code as a format) to be 
sent at very slow speed, while maximizing airtime use during normal dispatch.
 
Courtesy Tone Frequency 
The courtesy tone is used for courtesy tone and prompt beeps. It is programmable in frequency from 400 to 2500 Hz, and the default setting 
is 1000 Hz. 
A possible reason to change the frequency could be to differentiate between co-channel repeaters to know which repeater site is active. 
System ID User Number 
A user number may be assigned as the System ID user number so that the repeater will identify every ID interval (1 to 99 minutes). 
Before sending the System ID, the following conditions must be met: 
• The system ID interval timer must expire (adjustable 1 to 99 minutes).  
• The ZR310 must be inactive (TPL/DPL Decode LED off).  
• The System ID must have a number programmed.  
 
 
 
March, 1993  6880902Z68-O  Section 6-8