Tait TP9100 User manual

TP9100 Service Manual 11
© Tait Electronics Limited May 2005
TP9100 portables
Chapter 1
Description of the Radio

12 TP9100 Service Manual
© Tait Electronics Limited May 2005
Chapter 1  Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.1 Keypads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.2 Frequency Bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.3 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.4 Product Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.5 Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.1 Mechanical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3 Connectors and Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.4 Hardware and Software Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.5 Operation in Receive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.6 Operation in Transmit Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3 Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.1 Transmitter Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.2 Receiver Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3.3 Frequency Synthesizer Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.4 Frequency Control Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.5 CODEC and Audio Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.6 Power Supply Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.7 Interfaces Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3.8 Digital Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
3.9 Front-Panel Interface Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

TP9100 Service Manual Introduction 13
© Tait Electronics Limited May 2005
1 Introduction
The TP9100 series is a range of high-performance microprocessor-
controlled portable radios for digital (APCO project 25-compatible), analog
and mixed operation for voice and data communication.
This manual includes the information required for servicing the radio and
its accessories.
This section describes the different options available for:
■keypads
■frequency bands
■accessories
■product codes
This section also gives an overview of the labels on the product and the
specifications.
Figure 1.1 TP9100 portable radios
TP9160TP9155

14 Introduction TP9100 Service Manual
© Tait Electronics Limited May 2005
1.1 Keypads
The radios are available with the following keypads:
■TP9160 with 16-button keypad (two scroll and two selection keys and
10 alphanumeric keys)
■TP9155 with 4-button keypad (two scroll and two selection keys)
The keypads are implemented by different front panels and keypads.
The rest of the radio hardware is identical.
1.2 Frequency Bands
The radios are available in the following frequency bands:
■136 to 174MHz (B1)
■400 to 470MHz (H5)
■450 to 530MHz (H6)
The frequency bands are implemented by different main boards.
1.3 Accessories
Tait offers a large variety of audio accessories, antennas, a single battery
charger, batteries, and other accessories such as carry cases.
For more information on the serviceable accessories refer to Chapter 3
Accessories on page 295 of this service manual.
Audio Accessories The radios allow for the connection of a comprehensive range of audio
accessories:
■“Evolution” speaker microphone
■light duty headset with boom microphone (behind the head)
■heavy duty headset with noise-canceling boom microphone (over the
head)
■three wire headset with mini-lapel microphone
■accessory connector kit
■third-party audio accessories as approved on a per-CSO basis
Antennas The radios allow for the connection of helical and whip antennas. For an
overview of the antennas available, refer to “Antenna Identification Chart”
on page 297.

TP9100 Service Manual Introduction 15
© Tait Electronics Limited May 2005
Single Battery
Charger and
Batteries
The single battery charger is used to charge the following Tait batteries:
■6-cell NiMH
■6-cell NiCd
1.4 Product Codes
This section describes the product codes used to identify products of the
TP9100 portable radio product line.
Radios The product codes of the TP9100 portable radios have the format:
TPA1a–bbcc
where:
■aidentifies the keypad option:
1=4-button keypad, 2=16-button keypad
■bb identifies the frequency band:
B1=136 to 174MHz, H5=400 to 470MHz, H6=450 to 530MHz
■cc identifies any radio options.
Accessories The product code of the accessories specific to the TP9100 portable radios
have the format:
TPA–xx-xxx
1.5 Labels
The following external labels are attached to the back of the radio (covered
by the battery):
■compliance information and RF exposure safety warning
■serial number and product code
Figure 1.2 Labels of the TP9100 series
TPAB12-B100
136-174 MHz
S/N
19061964
102104337
Contains intellectual property licenced by
Digital Voice Systems Inc, Motorola Inc
and Tait Electronics Ltd.
Details in user documentation.
N46
TPAB1A
FCC ID: CASTPAB1A
Made in New Zealand by Tait Electronics Ltd.
IC: 737A-TPAB1A
ATTENTION!
Restricted to
occupational use to satisfy
FCC RF exposure limits. See user's
guide for operating instructions.

16 Introduction TP9100 Service Manual
© Tait Electronics Limited May 2005
1.6 Specifications
Introduction Table 1.1 shows the specifications for the TP9100 radios. The parameter
values quoted are minimum values. These specifications are valid for the date
of publication only. For up-to-date specifications, refer to the area on the
TaitWorld website reserved for TP9100 products.
Table 1.1 Specifications
Parameter Values
Basic characteristics
Frequency bands:
• B1 band
• H5 band
• H6 band
136 to 174MHz
400 to 470MHz
450 to 530MHz
Frequency stability ±1.5ppm
Channel capacity (simplex or semi-duplex) 512
Channel spacing:
• narrow
• medium
• wide
12.5kHz
20kHz
25kHz
Supply voltage: 7.5±1.5V DC
Antenna connector SMA
Accessory connector Ports: 1 serial, 2I/O, 1 audio tap in, 1 audio tap out, PTT,
speaker, microphone
Physical characteristics
Weight (with battery and antenna as stated, no belt
clip):
• with TPA-BA-201 (NiCd) and helical antenna
• with TPA-BA-201 (NiCd) and whip antenna
• with TPA-BA-203 (NiMH) and helical antenna
• with TPA-BA-203 (NiMH) and whip antenna
22.05oz. (625g)
21.55oz. (611g)
20.95oz. (594g)
20.46oz. (580g)
Dimensions (with battery, without antenna and
belt clip):
• height
• width
• depth
7.28in. (185mm)
2.60in. (65mm)
1.77in. (45mm)

TP9100 Service Manual Introduction 17
© Tait Electronics Limited May 2005
Environmental conditions
Operating temperatures !22"F to +140"F#$!30"C to +60"C)
Standards
• IP54
• MIL-STD 810C, D, E and F
(for details contact Technical Support)
Meets the requirements for sealing against:
• dust
• rain
Meets the requirements regarding the following aspects:
• low pressure
• high temperature
• low temperature
• temperature shock
• solar radiation
• rain
• humidity
• salt fog
• dust
• vibration
• shock
Receiver
Sensitivity <!118dBm for 12dB SINAD
Intermodulation >66dB
Spurious responses >72dB
Selectivity:
• narrow channel spacing
• medium channel spacing
• wide channel spacing
>65dB
>70dB
>75dB
Hum and noise:
• narrow channel spacing
• medium channel spacing
• wide channel spacing
>40dBm
>41dBm
>43dBm
Audio bandwidth 300Hz to3 kHz (flat or with de-emphasis)
Audio distortion <3%
Receive current (Vcc=7.5V)
• stand-by (analog mode)
• stand-by (P25 digital mode)
• stand-by (dual mode)
• receiver active, 0.5W audio into 16ohms
89mA
90mA
91mA
270mA
Table 1.1 Specifications (Continued)
Parameter Values

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© Tait Electronics Limited May 2005
Transmitter
Output power:
• level 1 (very low)
• level 2 (low)
• level 3 (medium)
• level 4 (high)
1W
2W
2.5W (UHF), 3 W (VHF)
4W (UHF), 5W (VHF)
Transmit current (Vcc=7.5V, radio transmitting at
high power, mean value across each band)
• B1 band
• H5 band
• H6 band
1.72A typ
1.76A typ
1.60A typ
Modulation limiting:
• narrow channel spacing
• medium channel spacing
• wide channel spacing
<±2.5kHz
<±4kHz
<±5kHz
FM hum and noise:
• narrow channel spacing
• medium channel spacing
• wide channel spacing
136 to 500MHz: above 500MHz:
> 34dB >31dB
> 48dB >35dB
> 40dB >37dB
Conducted and radiated emissions:
• up to 1GHz
• between 1 and 4GHz
(for radio operating frequencies below 500 MHz)
• between 1 and 12.75GHz
(for radio operating frequencies above 500MHz)
<!36dBm
<!30dBm
<!30dBm
Audio bandwidth 300Hz to 3kHz (flat or with pre-emphasis)
Audio distortion <3% at 1kHz 60% modulation
Table 1.1 Specifications (Continued)
Parameter Values

TP9100 Service Manual Description 19
© Tait Electronics Limited May 2005
2 Description
This section describes the mechanical design and architecture of the radio,
explains the operation of the transceiver, and gives pinouts of the radio
connectors and contacts.
2.1 Mechanical Design
Overview The radio consists of the following main components:
■antenna
■battery
■radio
2.1.1 Antenna
The antenna screws into the antenna SMA connector at the top of the radio.
For an overview of the available antennas refer to “Antenna Identification
Chart” on page 297.
2.1.2 Battery
The battery is held in place by two lugs at the bottom of the battery which
fit into two holes at the bottom of the radio, and a catch mechanism at the
top of the radio, which is released by squeezing two symmetrical latches.
The battery connects to the radio electrically by three contacts. For more
information refer to “Connectors and Contacts” on page 27.

20 Description TP9100 Service Manual
© Tait Electronics Limited May 2005
2.1.3 Radio
The circled numbers in this section refer to the items in Figure 2.1 on
page 21.
Knobs and
3-way Actuator The volume knob 1) is fitted to the D-profile shaft of the power/volume
potentiometer, which is soldered to the main board. An internal D-profile
spring holds the knob in place. The volume knob seal J around the shaft
of the volume knob provides additional sealing.
The blue 3-way actuator H engages to the three-way switch of the
combined 16-way/3-way selector switch, which is soldered to the main
board. The channel knob I is fitted to the D-profile shaft of the 16-way
switch of the combined 16-way/3-way selector switch. An internal D-
profile spring holds the knob in place.
Front-Panel
Assembly The front-panel assembly Bcontains the features and components of the
user interface. For more information on the user interface refer to “User
Interface” on page 26.
At the top of the front-panel assembly, three holes are provided for the
antenna SMA connector, the 16-way/3-way selector switch, and the
power/volume potentiometer of the main board 2#.
An orange emergency key presses down on a metal lever on the inside of the
front-panel assembly operating a tact switch on the main board 2#.
A light pipe fitted to the inside of the front-panel assembly transmits light
from the status LED on the main board 2# to the top of the radio.
The front contains the speaker grille, the lens covering the LCD assembly
1*, and 16 holes or 4 holes for the silicone keypad 1^. A rectangular foam
frame fitted around the aperture of the front panel protects the LCD
assembly against mechanical shock.
Note The emergency key mechanism, the light pipe, the lens, and the
rectangular foam seal are not serviceable items. In case of damage,
the entire front-panel assembly must be replaced. For more infor-
mation refer to “Spare Parts” on page 289.
Two screws inserts inside the bottom of the front-panel assembly are
provided to screw the chassis 3) to the front-panel assembly.