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Spectra Engineering RELM BK Radio MX800 T19 Technical Manual Download Page 35

Technical Manual 

MX800 Transceiver T19 Option 

 

 

 

1.8  RX Line Output Frequency Compensation

 

 

This feature provides Line Output Frequency Compensation on the 4-Wire port (CN9). Any 
substantial low or high frequency signal attenuation can be compensated for, by configuring the 2 
Shelf equalizers. The Equalizer is configured by adjusting switches on an 8-Way DIP switch 
(Dip1). The Equalizer can be enabled or disabled by the setting of JMP6. The switches provide 

 

 

Table 1-6  Line Equalizer Settings

 

 

DIP Switch

 

Type

 

Approximate Gain

 

1 

Low Shelf (400Hz) 

+0dB 

2 

Low Shelf (400Hz) 

+3dB 

3 

Low Shelf (400Hz) 

+6dB 

4 

Low Shelf (400Hz) 

+9dB 

5 

High Shelf (2500Hz) 

+0dB 

6 

High Shelf (2500Hz) 

+3dB 

7 

High Shelf (2500Hz) 

+6dB 

8 

High Shelf (2500Hz) 

+9dB 

 

Figure 1-8 Line Equalizer Response Graph

 

 

 

33 

© SPECTRA ENGINEERING 2010 Revision 1.0.4 

 

Summary of Contents for RELM BK Radio MX800 T19

Page 1: ...Base Station Repeater Receiver and Transmitter MX800 T19 Option T19 Technical Manual...

Page 2: ...This page left blank intentionally...

Page 3: ...ence is not accepted by Spectra Engineering Pty Ltd or any director officer agent or employee of Spectra Engineering Pty Ltd Copyright Spectra Engineering Pty Ltd 1997 2010 This work is copyright Othe...

Page 4: ...MX800 Transceiver Technical Manual This page left blank intentionally 2 SPECTRA ENGINEERING 2010 Revision 1 0 4...

Page 5: ...issued you will also receive a replacement for this page Date Version Chapter Changes Pages Changed 30 03 08 1 0 0 Initial Release 30 03 09 1 0 1 Added Tone Remote Section 10 06 09 1 0 2 Updated Sect...

Page 6: ...environment constitutes a definite safety hazard DO NOT ATTEMPT INTERNAL SERVICE WHILE TRANSMITTING Thermal or RF burns may result from touching certain components within the power amplifier module w...

Page 7: ...LCALL 21 1 6 4 Selecting the tone set 22 1 6 5 Configuring the SELCALL commands 22 1 6 6 Changing the SELCALL transmit preamble 24 1 6 7 Changing the SELCALL acknowledge preamble 24 1 7 Motorola TRICK...

Page 8: ...ical Manual 2 1 2 Diagnostics Menu 41 2 1 3 Calibration Menu 42 3 Setting up HyperTerminal 43 4 Firmware Upgrade 49 4 1 Upgrade Procedure 49 4 1 1 Upgrade Steps 49 5 PCB Overlay 51 6 SPECTRA ENGINEERI...

Page 9: ...ut Detail View from Rear of MX800 34 Figure 1 10 CN9 RJ45 Pin out Detail View from Rear of MX800 35 Figure 2 1 T19 T26 Main Software menu 37 Figure 2 2 T19 T26 configuration menu 38 Figure 2 3 T19 T26...

Page 10: ...MX800 Transceiver Technical Manual Figure 0 1 T19 T26 PCB Overlay 51 8 SPECTRA ENGINEERING 2010 Revision 1 0 4...

Page 11: ...iable Tone Voting Base Station Stepped Tone Voting Status Tone Encoding And Decoding T19 only Five Tone Encoded Decoder T19 only Remote Control Capabilities VF Line compensation for SINAD Voters Real...

Page 12: ...le Assy Qty 1 10 CABLE IDC DB15F IDC SKT 16W 210mm cable Assy Qty 1 11 CABLE IDC SKT IDC SKT 16WAY 210mm cable Assy Qty1 Test Equipment Required 1 Communications Test Set 2 MX800 Radio Interface Box N...

Page 13: ...n the Motherboard and SKX on the Option board This cable will be under option PCB when mounted 10 Install the Option Printed Circuit Board onto the 4 standoffs with the 16way connector closest to DIP2...

Page 14: ...0 R129 Right hand side of PCB above RV4 1 3 T19 T26 Secondary E M leads The MX800 T19 option board has a secondary E M lead designated E2 and M2 respectively Unlike the primary E M leads that appear o...

Page 15: ...posed the receiver VF is notch filtered at the tone frequency A Second PTT function designed for mobile voting systems transmits carrier with no modulation including no CTCSS to allow mobiles to vote...

Page 16: ...dBm 1 4 3 Adjustment The process for adjusting the noise measurement circuit for range is to inject a signal of about 0 6uV or approximately 111 4 dBm into the receiver and measure the filtered noise...

Page 17: ...receiver frequency of the test channel At a RF level of 60 dBm 4 Adjust Line Output level RV4 to obtain nominal line output level 10dBm is the default level 5 Set the RF level to 0 6uV 111 4dBm on th...

Page 18: ...ine system The decoder then processes the status tones and applies the various functions as need I e Programmable PTT tones PTT ON PTT OFF RX mute status tone encoder provides a signalling tone either...

Page 19: ...X modulation depth and insure it is equal to the nominal deviation level If not adjust RV4 on the motherboard to obtain correct level 1 5 1 3 Status Tone Encoder Decoder RX Alignments 1 Using a 600ohm...

Page 20: ...transmitted the SELCALL encoder will translate the sequence as 1E12E where the character E is the Repeat character 1 6 1 SELCALL Tone Sets The nominal tone durations for each SELCALL system is given...

Page 21: ...3 4 1358 1358 1400 1400 1270 1164 5 1446 1446 1530 1530 1400 1305 6 1540 1540 1670 1670 1530 1446 7 1640 1640 1830 1830 1670 1587 8 1747 1747 2000 2000 1830 1728 9 1860 1860 2200 2200 2000 1869 Group...

Page 22: ...ure for the SELCALL module consists of selecting the desired protocol enabling the commands and other parameters This is done in the SELCALL menu entered by selecting Configuration Menu Selective call...

Page 23: ...lthough the packet size is user programmable This means that if the number of digits is set to 5 then only the SELCALL packets with 5 tones will be decoded This is to reduce the likelihood of false de...

Page 24: ...equencies and tone durations thus supporting other less common SELCALL tone sets 1 6 5 Configuring the SELCALL commands The SELCALL commands menu allows the user to configure the command tone sequence...

Page 25: ...into the Repeater Knock Down state Depending on the repeater type setting the radio will not re transmit any valid audio 1 6 5 3 Repeater Enable If this command is enabled a successful decode will en...

Page 26: ...selectable from 0 to 65 seconds and includes the required silence preamble for the selected SELCALL protocol This property will help to compensate for the key up delays that may occur in a radio syst...

Page 27: ...A radio repeater is said to be in the Enabled state if it re transmits valid received audio The repeater is enabled only for the duration of the conversation i e once the Time Out Timer TOT or Hang Ti...

Page 28: ...ELCALL tone sequences only When the repeater is knocked down reception of the RAT and valid audio will enable the repeater When the repeater is set up it can be enabled purely by the valid audio signa...

Page 29: ...ncoders Three 5 tone encoders are supported Each encoder may be configured to encode telegrams with lengths between 1 and 11 individual tones The three encoders support the following functions Disconn...

Page 30: ...decode telegrams with lengths between 1 and 11 individual tones Each decoder may be assigned to one of the following functions Repeater Set Up Repeater Knock Down Repeater Set Up Knock Down Toggle Re...

Page 31: ...to be performed FT values range from 750 Hz to 2350 Hz in 100 Hz steps excluding 2150 Hz and 2050 Hz The 1950 Hz function tone is the standard key on Channel 1 frequency As previously mentioned the LL...

Page 32: ...figuration of the functions associated to the defined function tone frequencies the system default configuration has been selected to allow the best compatibility with other third party wire line cons...

Page 33: ...Repeater Mode 12 TRC line controlled C 13 ESC 14 ESC 15 Programming is complete 1 7 5 2 Tone Remote Control Setup TX Alignments For ease of alignment program the decoder in step 5 above to 1 Tone PTT...

Page 34: ...Remote Control Setup RX Alignments 1 Using a 600ohm termination monitor RX line output level This output is located on the rear of the MX800 RJ45 Line I O connector pin 1 2 balanced audio 2 Set the r...

Page 35: ...ualizer is configured by adjusting switches on an 8 Way DIP switch Dip1 The Equalizer can be enabled or disabled by the setting of JMP6 The switches provide Table 1 6 Line Equalizer Settings DIP Switc...

Page 36: ...NPUT PORT B BCD Channel Select Units bit 0 Binary Bit 0 8 INPUT PORT B BCD Channel Select Units bit 1 Binary Bit 1 20 INPUT PORT B BCD Channel Select Units bit 2 Binary Bit 2 7 INPUT PORT B BCD Channe...

Page 37: ...nced RX VF leg b 3 600ohm balanced TX VF leg a 4 600ohm balanced TX VF leg b 5 M1 Lead common 6 M1 Lead normally open 7 E1 Lead leg a M lead normally closed 8 E1 Lead leg b Table 1 8 CN9 Connections 1...

Page 38: ...JMP13 AGC IN OUT 2 3 JMP14 High Pass Filter IN OUT 2 3 JMP15 2W 4W Selection 1 2 4Wire mode JMP16 2W Isolation Balance N F Unlinked JMP17 2W Isolation Balance N F Unlinked JMP18 2W Isolation Balance...

Page 39: ...arity 8 data bits and 1 stop bit HyperTerminal which is included with all Windows versions is suitable for communicating with the T19 T26 option board The software menu system can be entered by sendin...

Page 40: ...sceiver Technical Manual 2 1 1 Configuration Menu Figure 2 2 T19 T26 configuration menu 2 1 1 Encoder Configuration Menu Figure 2 3 T19 T26 Encoder configuration menu 38 SPECTRA ENGINEERING 2010 Revis...

Page 41: ...0 Transceiver T19 Option 2 1 2 Hardware Configuration Menu Figure 2 4 T19 T26 Hardware configuration menu 2 1 1 DTMF Configuration Menu Figure 2 5 T19 T26 DTMF configuration menu 39 SPECTRA ENGINEERIN...

Page 42: ...3 Tone Remote Control Configuration Menu The Tone Remote Control Decoder must be enabled under the decoder configuration menu first Disabled Display function tone message to enable Mxtools Diagnostics...

Page 43: ...n the diagnostics menu is the ability to restore the configuration settings back to the factory default This allows the user to restore the T19 T26 board to a known good state Figure 2 9 T19 T26 diagn...

Page 44: ...MX800 Transceiver Technical Manual 2 1 3 Calibration Menu Figure 2 10 Calibration Menu 42 SPECTRA ENGINEERING 2010 Revision 1 0 4...

Page 45: ...up and configuration procedures described in this document Creating a HyperTerminal connection 1 Start the HyperTerminal program by selecting Start Programs Accessories Communications HyperTerminal If...

Page 46: ...ver Technical Manual 2 Next you will need to set the communication parameters for the COM port you will be using Then click OK Figure 3 2 HyperTerminal COM port selection 44 SPECTRA ENGINEERING 2010 R...

Page 47: ...rTerminal communication parameters below Figure 3 3 HyperTerminal communication parameters 4 Click OK 5 You have now created your connection We will now configure the terminal emulation 6 Click on the...

Page 48: ...MX800 Transceiver Technical Manual Figure 3 4 HyperTerminal disconnect 7 In the File menu select Properties Figure 3 5 HyperTerminal connection properties 46 SPECTRA ENGINEERING 2010 Revision 1 0 4...

Page 49: ...MX800 Transceiver T19 Option 8 Click on the Settings tab Set up the parameters as shown in HyperTerminal terminal settings below Figure 3 6 HyperTerminal terminal settings 47 SPECTRA ENGINEERING 2010...

Page 50: ...SCII setup below as a guide Figure 3 7 HyperTerminal ASCII setup 10 Click OK 11 On the File menu select Save As to save the current connection setup for future use 12 You are now ready to program the...

Page 51: ...itch on the front panel of the MX800 radio at reset or power up If the push button switch is depressed at reset the bootloader will enter monitor mode Here is a list of items required to complete this...

Page 52: ...ser will have approximately 15 seconds to complete this step If the character C is received before the file transfer starts hit the ESC key after the Xmodem file transfer diaglog box appears This will...

Page 53: ...Technical Manual MX800 Transceiver T19 Option 5 PCB Overlay Figure 0 1 T19 T26 PCB Overlay 51 SPECTRA ENGINEERING 2010 Revision 1 0 4...

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