1
VTE-1
Voting Tone Encoder
Manual Revision: 2011-08-26
Covers Loader Firmware Revisions:
1.70 & Higher
Covers Application Firmware Revisions:
1.40 & Higher
Covers PCB Revisions:
F
Page 1: ...1 VTE 1 Voting Tone Encoder Manual Revision 2011 08 26 Covers Loader Firmware Revisions 1 70 Higher Covers Application Firmware Revisions 1 40 Higher Covers PCB Revisions F ...
Page 2: ...F CONTENTS Specifications 3 General Information 4 Hardware Installation 5 Hardware Alignment 6 Jumper Settings 7 Controls Indicators 8 Operation 8 Theory of Operation 9 Technical Notes 10 Contact Information 10 ...
Page 3: ...00 3000 Hz Notch Filter Depth 45 db relative to 1 KHz Dynamic Range 30 dB COR Input Logic Low Dedicated Phone Line Output Level 20 to 10 dB pot adjustable Output Impedance 600 Ohm Fuse Protection Auto Resettable with surge suppression 300 mA Mechanical Dimensions 1 45 H x 6 W x 7 6 L Operating Temp 0 to 50 C Default Pilot Tone Frequencies 1950 Hz default 2175 Hz 2700 Hz 1600 Hz No Tone for auxilia...
Page 4: ... from multiple voting receivers and passes the best quality signal to the dispatcher repeater The VTE 1 looks at the COR coming from the receiver When COR is inactive the VTE 1 generates a voting tone to the voting comparator This tone is selectable as 1950 Hz 2175 Hz 1600 Hz or 2700 Hz Custom tones can also be ordered from Midian When the receiver s COR is active the tone is no longer generated a...
Page 5: ...ductor phone cable will function properly in connector CON7 See table 3 1 Table 3 1 Pin Color 2 Wire CON7 4 Black Not Used CON7 5 Red Line 1 CON7 6 Green Line 1 CON7 7 Yellow Not Used Radio Interface CON6 is located in the middle of the back panel and is used to connect the VTE 1 to the satellite or auxiliary receiver The following are the connection points CON6 CON6 2 Orange COR Connect this lead...
Page 6: ... voice being received from the base station adjust RP6 while monitoring the line out with a line level meter and set for approximately 10 dB on average voice or 5 dB on peak voice Pilot Tone Level Adjustment 1 Prior to performing this step the line level adjustments above must be done Set RP2 to the desired dB level 20 to 10 dB Setting the COR Input of the VTE 1 to the inactive state logic high wi...
Page 7: ...lt Position Description JP21 1 2 In 2 3 Out De Emphasis jumper JP36 1 2 In Termination jumper JP40 1 2 In Termination jumper JP41 1 2 Out 2175 Hz Pilot Tone Select JP42 1 2 In 1950 Hz Pilot Tone Select JP43 1 2 Out 2700 Hz Pilot Tone Select JP44 1 2 Out 1600 Hz Pilot Tone Select JP41 JP44 All Out No Pilot Tone ...
Page 8: ...ed from the receiver Tone LED This red LED indicates the Pilot Tone is being generated OPERATION Voting Tone Encode When COR is inactive from the receiver to the VTE 1 the unit will generate the selected Pilot Tone to the voting comparator Receive When COR is active from the receiver to the VTE 1 the unit will pass the voice from the receiver to the voting comparator ...
Page 9: ... is injected into the audio path at C 59 PWM input Power Supply 13 18 VDC is input on the red wire of the Radio Interface connector and then into RF inductor L7 into an auto resettable polyswitch D22 is a polarity protection diode that is designed to pop the resettable fuse if power is hooked up backwards C31 and C34 act as RF bypass caps after the RF inductor L7 U6 acts as a 12 VDC regulator Its ...
Page 10: ... notes are available at this time MIDIAN CONTACT INFORMATION Midian Electronics Inc 2302 East 22nd Street Tucson Arizona 85713 USA Orders 1 800 MIDIANS Phone 520 884 7981 Fax 520 884 0422 E mail sales midians com Web www midians com ...
Page 11: ... 1 JP31 BSS Q34 12V 12V 12V 12V 12V 5V 5V 5V 12V 5V 5V 5V 5V 5V 5V 5V 5V 5V 12V 5V 12V 5V 5V 5V 5V 5V 5V 5V 5V TX_MOD_INPUT VOX ANTIVOX DUPLEX_PARALLEL_CROSSOVER GUARD_HOLD_TONE FUNCTION_TONE RX_LINE_ENABLE_DISABLE TELCO_RECV_MUTE TX_OUTPUT_ENABLE_DISABLE TX_IN_ENABLE_DISABLE PWM_VOICE DTMF_DECODER_2 RING SCR_MODE_IN RX_INPUT 13_TO_18_VDC HOOK SCR_OFF_HOOK SCR_PTT_IN TELCO_FEEDBACK_DISABLE 5V SCR_...
Page 12: ...PTION C TZ6 3 9K R138 390K R182 1u C49 22 CH1847 OPTION C TIP 1 RING 2 XMIT 7 RCV 6 VCC 8 GND 10 RI 5 OFFHK 4 XMIT 9 U13 1u C52 100K R277 1u C161 33K R249 100K R155 22K R154 43K R132 100K RP8 47K R194 47K R119 22u C89 1M R146 TP10 JP35 9 10 8 U18 3 LM660 5K RP7 001u C72 13 12 14 U10 4 LM324 1000p NPO C79 47u C115 1u C129 23 P0300 OPTION J TZ10 0R R307 100K R87 1K R232 10K R262 001u 2KV C166 0R R24...
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