Operator's Manual

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CIRCUIT DESCRIPTION

4-11

September 2001

Part No. 001-5100-001

4.4.6 UART

The UART performs parallel to serial and serial

to parallel conversion. The serial format used is a 9-bit

format with start and stop bits. The serial transmission

speed is 19200 bps. The UART appears as eight regis-

ters visible in the I/O space of the DSP starting at

every multiple of 0008h from 0000h to 07FFh. U11

performs the address decoding by selecting the UART

when both IS* and A15 are low. Crystal Y2 along with

the internal oscillator of the UART provides the clock

required to generate the correct bit rate on the serial

output of the UART.

When the UART receives a new serial word or is

ready to accept a new word to send from the DSP, it

generates an interrupt on INTRN. This pin is

connected to one of the hardware interrupt lines on the

DSP. The DSP responds by reading the status register

in the UART and by answering accordingly.

4.4.7 ADSIC

The ADSIC is a complex custom IC which

performs many analog-to-digital, digital-to-analog,

and purely digital functions as previously described.

The ADSIC has four internal registers accessible by

the DSP. They are selected through the use of address

lines A15, A14, A13, A2, A1, A0, IS* (IS* needs to be

inverted with U4 to be compatible with the logic level

required by the ADSIC), RD*, and WR*. Two of these

registers are read-only while the two others are write-

only. Therefore, they can be accessed as two locations

in the I/O spaces. Due to the decoding performed,

those locations appear at the following addresses:

Fxx0h, Fxx1h, Fxx8h, Fxx9h, Exx0h, Exx1h, Exx8h,

and Exx9h.

Crystal Y1 along with the internal oscillator in

the ADSIC provide a 20 MHz clock. This clock signal

is used internally by the ADSIC and is also multiplied

by two to provide a 40 MHz clock to the DSP. The

frequency of the clock can be electronically shifted a

small amount by controlling varicap D1 through the

OSCW pin (U3-97). This removes interference created

on some channels by the clock.

The ADSIC and DSP exchange the sampled

receive data and the sampled VCO modulation signal

through a serial port. This serial port consists of pins

SCKR*, RFS, RxD, TxD, SCKT, and TFS on the

ADSIC. U21 and U1 modify the relative phase of TxD

and TFS to be compatible with the timing required on

the serial port of the DSP.

SDO is the output of the internal speaker DAC.

MAI is the input of the internal microphone attenuator

and is followed by the microphone ADC.

The ADSIC is configured partially by the DSP

through its data and address bus (see preceding).

However, most of the configuring is provided through

an SPI compatible serial bus. This SPI serial bus

consists of pins SEL*, SPD, and SCLK. The other side

of this bus is connected to the controller on the

Keypad Board.

4.5 KEYPAD BOARD

4.5.1 INTRODUCTION

The Keypad Board contains a microcontroller,

LCD Display, Display Driver, Audio circuits, and

Power supply. The Keypad Board interfaces with the

Digital board via J4, with the Top Control rigid flex

circuit via J13, and with the side buttons, PTT switch,

and accessory connector through J5.

4.5.2 FUNCTIONAL DESCRIPTION

The microcontroller provides an interface

between the hardware and the DSP (on the Digital

Board). When the user presses or rotates a control such

as the channel selector switch, a side option or PTT

switch, or a keypad key, the microcontroller signals

the change to the DSP. Conversely, when the DSP

needs to change the display or an LED, it signals the

microcontroller which then performs the action. The

microcontroller also controls peripheral ICs such as

the synthesizer, reference oscillator, display, and

ADSIC.

The microcontroller uses a serial bus to commu-

nicate with the DSP and another RS232 bus to

communicate with the side port connector. The side

connector bus is used for external communication with

a computer running the programming or tuning soft-

ware. Finally, the microcontroller maintains certain

operating parameters in the associated EEPROM

which is controlled via a two-wire serial bus.

DIGITAL BOARD (CONT’D)

Summary of content (28 pages)

PAGE 1
CIRCUIT DESCRIPTION DIGITAL BOARD (CONT’D) 4.4.6 UART SCKR*, RFS, RxD, TxD, SCKT, and TFS on the ADSIC. U21 and U1 modify the relative phase of TxD and TFS to be compatible with the timing required on the serial port of the DSP. The UART performs parallel to serial and serial to parallel conversion. The serial format used is a 9-bit format with start and stop bits. The serial transmission speed is 19200 bps.
PAGE 2
CIRCUIT DESCRIPTION KEYPAD BOARD (CONT’D) 4.5.3 MICROCONTROLLER The keypad interfaces with the microcontroller through eight lines (4 rows x 4 columns). The microcontroller regularly polls these lines to detect a key closure. The microcontroller is a Motorola M68HC08XL36 chip. It includes 28K bytes of internal ROM memory and 1K byte of internal SRAM. It does not have an external bus and therefore cannot access any external program memory.
PAGE 3
CIRCUIT DESCRIPTION KEYPAD BOARD (CONT’D) current to 1.5 A. The under voltage protection turns the converter off if the input (Unswitched B+) voltage drops below 5.45 V. is then fed through the volume control potentiometer to a second op amp buffer. The buffer output is routed to a pair of audio power amplifiers: one to drive the internal speaker and another to drive the external speaker. Only one of these audio power amplifiers can be active at a time.
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ALIGNMENT PROCEDURE SECTION 5 ALIGNMENT PROCEDURE Communication Monitor SINAD Meter Figure 5-1 Alignment Setup 5.1 GENERAL 5.1.2 TUNE SOFTWARE 5.1.1 INTRODUCTION General The following alignment procedure should be performed if repairs are made that could affect the factory alignment or if adjustments may have changed for some other reason. The PCTune software is a Windows® program.
PAGE 5
ALIGNMENT PROCEDURE 3. From the Windows 95 taskbar, choose RUN and open SETUP.EXE on drive A: (or B:). Alternatively, use File Explorer and double click SETUP.EXE. From the Windows 3.1 Program Manager, choose FILE > RUN and select the SETUP.EXE file on drive A: (or B:). 4. Follow the instructions on the screen. The program is automatically loaded on the hard drive and startup shortcuts or groups are created. 5. The computer then attempts to establish communication with the transceiver.
PAGE 6
ALIGNMENT PROCEDURE Figure 5-2 Tuning Software Screen (800 MHz Models) 4. The preceding 3 kHz and 1 kHz tone adjustments are then repeated on several other frequencies across the band. After the last adjustment is made, the transmitter unkeys and the settings are stored. 2. Inject the frequencies and signal levels indicated on the computer screen. When tuning is complete, a message is displayed and the settings are saved. 5.4 TRANSMIT POWER ADJUSTMENT 5.
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ALIGNMENT PROCEDURE 3. When prompted, adjust the output level for 8 dB SINAD and click OK. 4. Proceed as prompted and when this adjustment is complete, a message is displayed and the settings are stored. 5.7 RSSI ADJUSTMENT NOTE: With some early models, this adjustment cannot be made using the PCTune software so an error message is displayed when it is selected. This adjustment calibrates the RSSI signal level. Proceed as follows: 1. Connect an RF signal to the antenna jack. Click OK with “RSSI” selected.
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PARTS LIST SECTION 6 PARTS LIST Ref No. Description Part No. Ref No. C 037 C 038 C 039 C 040 C 041 C 042 C 043 C 044 C 045 C 046 C 047 C 048 C 049 C 050 C 051 C 052 C 053 C 054 C 055 C 056 C 057 C 058 C 059 C 060 C 061 C 062 C 063 C 064 C 065 C 066 C 067 C 068 RF BOARD (A450) Individual replacement parts not available. Replace entire assembly. DIGITAL BOARD (A100) Part No.
PAGE 9
PARTS LIST DIGITAL BOARD (CONT’D) Ref No. Description Part No. C 074 C 076 C 078 C 079 C 080 C 081 C 082 C 091 C 092 C 093 C 094 C 095 C 096 C 097 C 098 C 157 C 158 C 159 C 160 C 161 C 162 C 163 C 164 C 165 C 166 C 167 C 168 C 169 C 170 C 171 220 pF ±5% NPO 50V cer smd .1 µF +80/–20% Z5U 25V cer smd 220 pF ±5% NPO 50V cer smd .
PAGE 10
PARTS LIST DIGITAL BOARD (CONT’D) Ref No.
PAGE 11
PARTS LIST KEYPAD BOARD Ref No. Description Part No. Ref No. KEYPAD BOARD (A4xx) Part No. 023-5005-4xx A 430 DES interface board assembly 023-5005-430 C 001 C 002 C 003 C 004 C 005 C 006 C 007 C 008 C 009 C 010 C 011 C 012 C 013 C 014 C 015 C 016 C 017 C 018 C 019 C 020 C 021 C 022 C 023 C 024 C 025 C 026 C 027 C 028 C 029 C 030 C 031 C 032 C 033 C 034 C 035 C 036 C 037 C 038 C 039 C 040 .1 µF +80/–20% Z5U 25V cer smd .1 µF +80/–20% Z5U 25V cer smd .1 µF +80/–20% Z5U 25V cer smd .
PAGE 12
PARTS LIST KEYPAD BOARD (CONT’D) Ref No. C 086 C 087 C 088 C 089 C 090 C 091 C 092 C 093 C 094 C 095 C 096 C 097 C 098 C 099 C 100 C 101 C 102 C 103 C 104 C 105 C 106 C 107 C 108 C 109 C 110 C 111 C 112 C 113 C 114 C 115 C 116 C 117 C 118 C 119 C 120 C 121 C 122 C 123 C 124 C 125 C 126 C 127 C 128 C 129 C 130 Description Part No. 220 pF ±5% NPO 25V cer smd 100 pF ±5% NPO 25V cer smd 220 pF ±5% NPO 25V cer smd 220 pF ±5% NPO 25V cer smd 220 pF ±5% NPO 25V cer smd 10 pF ±0.
PAGE 13
PARTS LIST KEYPAD BOARD (CONT’D) Ref No. D 007 D 008 D 009 D 010 D 011 D 013 D 014 D 015 D 017 D 019 D 020 D 021 D 022 D 023 D 024 D 025 D 035 D 036 D 037 D 038 D 039 D 040 D 041 D 042 D 043 D 044 D 045 Description 5.6V zener SOT-23 10V zener SOT-23 10V zener SOT-23 10V zener SOT-23 Diode MMBD301LT1 Diode MMBD301LT1 Diode MMBD301LT1 5.
PAGE 14
PARTS LIST KEYPAD BOARD (CONT’D) Ref No. L 058 L 059 L 060 L 061 L 063 L 064 Description Ferrite smd inductor Ferrite smd inductor Ferrite smd inductor Ferrite smd inductor Ferrite smd inductor Ferrite smd inductor Part No. 542-9230-023 542-9230-023 542-9230-023 542-9230-023 542-9230-023 542-9230-023 MP 400 Front LCD holder,stamped 014-2229-508 P 400 P 430 515-9900-007 515-9500-018 Elastomeric connector Header, 8-pin Ref No.
PAGE 15
PARTS LIST KEYPAD BOARD (CONT’D) Ref No. R 061 R 062 R 063 R 064 R 065 R 066 R 067 R 068 R 069 R 070 R 071 R 072 R 073 R 074 R 075 R 076 R 077 R 078 R 079 R 080 R 081 R 082 R 083 R 084 R 085 R 086 R 087 R 088 R 089 R 090 R 091 R 092 R 093 R 094 R 095 R 096 Description 150 ohm ±5% 1/8W smd 1k ohm ±5% 1/16W smd 100k ohm ±5% 1/16W smd 27k ohm ±5% 1/16W smd 22k ohm ±5% 1/16W smd 10k ohm ±5% 1/16W smd 100k ohm ±5% 1/16W smd 2.
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PARTS LIST EXPLODED VIEWS MP005 MP004 MP001 S020 (5) PC020 EP020 MP002 EP010 PC010 MP003 6-9 September 2001 Part No.
PAGE 17
PARTS LIST NP101 MP102 MP101 S101 EP102 EP101 MP104 R101 ? EP040 S040 MP040 PC040 6-10 September 2001 Part No.
PAGE 18
PARTS LIST MP107 MP108 HW102 MP106 MP105 HW101 A051 MP109 MP114 MP115 MP116 MK101 W101 W102 MP110 MP111 MP112 SP101 MP113 W103 W104 6-11 Revised October 2000 Part No.
PAGE 19
PARTS LIST CH030 MP035 CH030 A035 A200 MP032 MP033 MP030 J050 MP035 PC050 A100 A030 6-12 September 2001 Part No.
PAGE 20
PARTS LIST A050 DS401 MP401 A402 A400 A401 MP402 NP102 6-13 September 2001 Part No.
PAGE 21
8-1 VHF RF BOARD SCHEMATIC September 2001 Part No. 001-5100-001 NOTE: Individual replacement parts are not available for the RF board, so the entire board must be replaced if it is defective.
PAGE 22
8-2 INT CAP IN U204 VHF RF BOARD LAYOUT BOTTOM VIEW A/D BYPASS XTAL 1 XTAL 2 A/D BYPASS ANODE 1 FRAC N SYNTH 25U31 0 XXYY 0 MODIN SUPFBASE VMULT 4 VMULT 3 VMULT 2 VMULT 1 FREFOUT DC5 GND U101 SUPFIN TX 5V BIAS EN CEX SUPFOUT RX 5V SUPFCAP RF DET CLK BIAS DC5V THERM PREIN REF V TEST 1 CATH 2 TX 2 RX 1 RT BIAS CPBIAS 2 TEST 2 CPBIAS 1 VCP ADAPT_SW IADAPT IOUT MODOUT GND TX 1 ANODE 2 D/A 62U70 X XXYY X ANT_EN U102 57W20 E28X 9307 U401 SC1 SW2 SC2 CE* SC4 SC3 SSL SUB REF
PAGE 23
8-3 UHF RF BOARD SCHEMATIC September 2001 Part No. 001-5100-001 NOTE: Individual replacement parts are not available for the RF board, so the entire board must be replaced if it is defective.
PAGE 24
8-4 INT CAP IN U204 UHF RF BOARD LAYOUT BOTTOM VIEW A/D BYPASS XTAL 1 XTAL 2 A/D BYPASS ANODE 1 FRAC N SYNTH 25U31 0 XXYY 0 MODIN SUPFBASE VMULT 4 VMULT 3 VMULT 2 VMULT 1 FREFOUT DC5 GND U101 SUPFIN TX 5V BIAS EN CEX SUPFOUT RX 5V SUPFCAP RF DET CLK BIAS DC5V THERM PREIN REF V TEST 1 CATH 2 TX 2 RX 1 RT BIAS CPBIAS 2 TEST 2 CPBIAS 1 VCP ADAPT_SW IADAPT IOUT MODOUT GND TX 1 ANODE 2 D/A 62U70 X XXYY X ANT_EN U102 57W20 E28X 9307 U401 SC1 SW2 SC2 CE* SC4 SC3 SSL SUB REF
PAGE 25
2 1 J2 R101 51k 5 C110 3.3pF RF INPUT + 13 1 2 3 REG 5V 4 L104 C114 33pF L106 180nH 2 Q503 1 4 5 OUT U201 3 8 7 6 L105 C521 .022uF 12 11 10 9 IN C103 33pF L108 180nH C101 20pF C520 10uF 5V (RX) 0V (TX) 5V dc 0V (RX) 5V (TX) 2 GND REF D/A R/T TX D/A RX D/A 0V (RX) CR104 9 C202 39pF 8 1 7.4V (RX) 4.2V (TX) 1 21 20 19 U503 D/A IC 5V 3 N/C R508 6.8k BIAS EN 5V (TX) L103 180nH L202 24nH L201 17nH CR102 C106 2.
PAGE 26
C107 L106 A A K VR2 L103 SH6 R503 C505 10 7 E1 CR104 A A C101 K L104 CR102 SH3 C103 C102 K L105 C106 C104 A A + E4 L201 G4 L202 8 9 C201 + C201 K A A 4 C221 C208 10 SH2 C340 C351 1 2 U205 7 6 1 6 CR301 4 3 4 B5 3 A4 D5 2 3 5 R310 R508 C339 C511 C404 + C405 C342 C431 A C413 C414 C409 C401 K 26 30 28 1 C427 + C417 + C434 R420 C419 + 29 27 25 23 54 59 63 67 72 55 60 64 68 73 56 61 65 69 74 70 75 16 15 14 12 10 8 57 62 16 3
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8-7 LOGIC BOARD (REV. 3) SCHEMATIC September 2001 Part No.
PAGE 28
8-8 REVISED KEYPAD BOARD SCHEMATIC September 2001 Part No.