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NHRC NHRC-2, Руководство пользователя

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A

A

B

B

C

C

D

D

DRAW N BY: N1LTL

BEEP LVL

RECEIVE AUDIO

RECEIVE
AUDIO MUTE

NOTES:
1. ALL RESISTORS ARE
1/4W 5% TOL. UNLESS
OTHERW ISE STATED.
2. ALL CAPACITORS ARE
16V ELECTROLYIC / 50V
CERAMIC UNLESS
OTHERW ISE STATED.

VREF SOURCE

BUFFER/FILTER

INIT

AUDIO OUTPUT AMP

NOTE:

PCB REV D

W HOLE W ITHOUT THE EXPRESSED
W RITTEN PERMISSION OF NHRC LLC.

COPIED, REPRODUCED, DISCLOSED,

PROPRIETARY INFORMATION W HICH

THIS DRAW ING CONTAINS

SPECIFICATIONS SUBJECT TO CHANGE

IS THE CONFIDENTIAL PROPERTY
OF NHRC LLC. IT SHALL NOT BE

PUBLISHED OR USED IN PART OR

W ITHOUT NOTICE OR OBLIGATION.

NOTICE

RX LVL

PROC RX LVL

SPEECH LVL

TX LVL

RECORD LVL

REMOVE C3,
CHANGE R3 AND R4
TO 100K FOR FLAT
AUDIO RESPONCE.

B

NHRC-2 (Audio)

NHRC Repeater Controllers

444 Micol Road
Pembroke, NH 03275
603-485-2248

B

2

2

Monday, February 28, 2000

http://www.nhrc.net

Title

Size

Document Number

Rev

Date:

Sheet

of

VCC

VDD

VREF

VDD

VREF

VREF

VREF

VCC

VDD

VDD

R2
10K

1

2

R7
1K

1

2

VR1
10K
POT

1

3

2

R4

510K

1

2

C4

0.1uF

1

2

C3

0.0068uF

1

2

R3

51K

1

2

+

C7

1uF

1

2

Q1
MPF102

3

1

2

Q2
2N2222

1

2

3

R6
100K

1

2

+

C2
1uF

1

2

R8

10K

1

2

VR2
500K
POT

1

3

2

R15
10K

1

2

+

C10

1uF

1

2

R11

33K

1

2

VR4
10K
POT

1

3

2

VR5
10K
POT

1

3

2

VR6
10K
POT

1

3

2

SW 1
JUMPER

1

2

R12

22K

1

2

R13

22K

1

2

R14

22K

1

2

+

C8

1uF

1

2

C6
0.1uF

1

2

R1
10K

1

2

R16

100K

1

2

VR3
10K
POT

1

3

2

R9

22K

1

2

+

C9

1uF

1

2

-

+

U5A
LM358

3

2

1

8

4

-

+

U5B
LM358

5

6

7

C5

0.1uF

1

2

R10
1K

1

2

R5

100K

1

2

+

C11
1uF

1

2

C1

0.1uF

1

2

+

C16
22uF
25V

1

2

BEEP

ISD_AUDIO

DISC_AUDIO

DECODE_AUDIO

REC_AUDIO

AUDIO_OUT

MUTE

VDD

GND

VCC

Содержание NHRC-2

Страница 1: ...Adjusting the Audio Levels 3 Initializing the Controller 2 Programming 1 Controller Modes 2 Programming the Controller 1 Programming the Timers 2 Programming the CW Messages 3 Programming the Flag Bi...

Страница 2: ...rd Layout 1 Installation 1 Electrical Connections The controller uses a female DB9 connector P1 for all signals It requires receiver audio and a signal present indication CAS from the receiver supplie...

Страница 3: ...y tinny unnatural sound to it To de emphasize the receiver audio on the controller board install a 0 0068uF capacitor in position C3 change R3 to 51K and change R4 to 510K These values should be consi...

Страница 4: ...at no more than 250mA of current be drawn through it because the trace on the PC board is somewhat narrow 2 Adjusting the Audio Levels Preset all potentiometers to midrange Connect an oscilloscope pro...

Страница 5: ...repeaters Normally when using link controller mode the hang time is set to 0 seconds and the controller is programmed to suppress DTMF muting so the user s DTMF commands will appear on the input of a...

Страница 6: ...s pairs of hex digits to represent 8 bit values for the address and data of programming information Any decimal number from 0 to 255 may be represented by two hex digits Hex digits are 0 1 2 3 4 5 6 7...

Страница 7: ...timer address and 64 is the hexadecimal value for 100 which would be 10 0 seconds 2 Programming the CW Messages CW messages are programmed by storing encoded CW characters into specific addresses in t...

Страница 8: ...ltiple flag bits can be selected by summing their hex weights For instance to set up a link controller with no ISD1420 no courtesy tone and suppress the DTMF muting you would add 01 10 and 20 to produ...

Страница 9: ...ontrol by setting the value in location 00 Set this location to zero to disable or non zero to enable For instance to disable the repeater send command pppp0000 To enable the repeater send command ppp...

Страница 10: ...0 Program the tail message counter value into address 05 3 Using the Tail Message as the Courtesy Tone The tail message can be used as the courtesy tone if bit 6 is set in the configuration flags In...

Страница 11: ...enable flag 01 00 configuration flags 02 32 hang timer preset in tenths 03 1e time out timer preset in seconds 04 36 id timer preset in 10 seconds 05 00 tail message counter 06 0f O OK Message 07 0d...

Страница 12: ...17 29 18 0a R 19 ff EOM 1a 00 can fit 6 letter ID 1b 37 not used 38 n a isd message 0 length in tenths 39 n a isd message 1 length in tenths 3a n a isd message 2 length in tenths 3b n a isd message 3...

Страница 13: ...r Morse Code Binary Encoding Hex Encoding sk 01101000 68 ar 00101010 2a bt 00110001 31 00101001 29 0 00111111 3f 1 00111110 3e 2 00111100 3c 3 00111000 38 4 00110000 30 5 00100000 20 6 00100001 21 7 0...

Страница 14: ...00010000 10 i 00000100 04 j 00011110 1e k 00001101 0d l 00010010 12 m 00000111 07 n 00000101 05 o 00001111 0f p 00010110 16 q 00011011 1b r 00001010 0a s 00001000 08 t 00000011 03 u 00001100 0c v 000...

Страница 15: ...as the 0 1uF bypass caps are non polarized and do not have a square pad They may be inserted either way Note Double check your work tantalum capacitors may explode upon power up if they are inserted b...

Страница 16: ...k after assembly and your finished product will look professional 12 Double check your work Check for any unsoldered parts solder bridges or improper part placement You are now ready to apply power to...

Страница 17: ...locks however neither part comes with jackscrews These are available separately using Newark P N 50F4689 Keystone 7228 0 24ea Some kit builders have reported that the AMP Amplimite 754781 4 Digikey A...

Страница 18: ...a receiver used in a repeater because the audio there is not subject to level changes caused by the volume control In many radios the de emphasis filter is downstream of the volume control which makes...

Страница 19: ...board Remove the ammeter and re apply power With all of the chips still removed check for 5 volts at pin 3 of U4 LM7805 pin 14 of U1 PIC16F84 pin 28 of U2 ISD1420 and pin 18 of U3 M8870 If any of the...

Страница 20: ...d rise to about 5 volts when the controller turns PTT on If not verify the CAS signal is working then examine the section in this document on a completely dead controller When PTT is turned on the gat...

Страница 21: ...9 C10 C11 C14 and C17 The tantalum caps have a very low ESR effective series resistance The use of any other type of cap will cause the output of the op amp to sit at the rail 12v Voltages around U5 L...

Страница 22: ...isy The leading cause of noise on recorded messages is improper bypass caps on the power supply leads around the 7805 and the ISD1420 Be certain that C13 is installed properly and is a minimum of 220u...

Страница 23: ...R CAS VCC VCC VCC VCC VCC VCC VCC VCC VDD VCC VDD VCC VCC VCC VCC VCC VCC VDD C25 0 1uF 1 2 R22 300K 1 2 R21 470K 1 2 R18 39K 1 2 C12 4 7uF 1 2 R31 10K 1 2 R30 1 5K 1 2 Q6 IRF510 1 2 3 R29 100 1 2 U2...

Страница 24: ...D R4 TO 100K FOR FLAT AUDIO RESPONCE B NHRC 2 Audio NHRC Repeater Controllers 444 Micol Road Pembroke NH 03275 603 485 2248 B 2 2 Monday February 28 2000 http www nhrc net Title Size Document Number R...

Страница 25: ...ee note 1 4 1 C12 4 7uF 4 7uF 50V Aluminum Electrolytic Cap Panasonic ECA 1HM4R7 P5177 ND 0 21 5 1 C13 220uF 220uF 25V Aluminum Electrolytic Cap Panasonic ECA 1EM221 P5153 ND 0 41 6 2 C15 22uF 22uF 25...

Страница 26: ...esistor Yaego CFR 25JB 5K1 5 1KQBK ND 0 06 28 1 R29 100 100 5 1 4W Carbon Film Resistor Yaego CFR 25JB 100R 100QBK ND 0 06 29 1 R30 1 5K 1 5K 5 1 4W Carbon Film Resistor Yaego CFR 25JB 1K5 1 5KQBK ND...

Страница 27: ...quent times is completely at the discretion of NHRC LLC and may require the complete return of the kit In no case will NHRC LLC be liable for products damaged by improper wiring including but not limi...

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