Hytera Communications MD78XIU1 Users Manual

UHF1 (400–470 MHz)

Contents

i

UHF1 (400–470 MHz)

Contents

UHF1 (400–470 MHz)

ii

Contents

1. Product Controls .................................................................................................................................. 1

2. Disassembly and Rea ssembly ............................................................................................................ 3

3. Exploded Vie w and Packing Guide .................................................................................................... 5

4. Specifications and Blind Spot ............................................................................................................ 8

5. Interface Definition ............................................................................................................................. 12

6. Tuning Descript ion ............................................................................................................................. 24

80

1. Product Controls

Volume Control/Group Call Selector

Front Panel

UHF1 (400–470 MHz)

No. Part Name No. Part Name

1

Knob

2 LED Indicator 9 Down Key

3 LCD Display 10 Speaker

4 OK/Menu Key 11 Redial/Answer/Call Key

5 Back/Group Call Manage me nt Key 12 Programmable Keys

6 Dial-back/End/Home Screen Key 13 Microphone Connector

7 Power On/Off Key 14 Microphone Installation I ndex

8 Up Key

Note

The above-mentioned pr oduct control is based on the mobile radio in the trunking mode. In the conventional mode, No. 1 ser ves as Volume Control / Channel Selector Knob, and No. 6 & No.11 serve as the Programmab le K eys.

UHF1 (400–470 MHz)

2

Rear Panel

No. Part Name No. Part Name

1 RF Antenna Connector 3 Accessory Connector

2 Power Inlet 4 GPS Antenna Connector

Note

The GPS antenna interfac e is only available for MD78XG.

UHF1 (400–470 MHz)

80

2. Disassembly and Reassembly

2.1 Disassembling the Radio

Step 1 Turn off the radio and remov e t he power cord, and loosen the two screws to remov e t he r adio.

Step 2 Remove the antenna. Step 3 Loosen the three screws to r em ove the front panel. Then remove the FFC.

Step 4 Detach the volume control knob and loosen the four screws. Then remove the PC B from the

control panel.

Step 5 Undo the clips on both sides of the radio, and then remove the rear cover.

4

Step 6 Loosen the eleven screws t o r emov e t he upper shield cover.

UHF1 (400–470 MHz)

Step 7 Loosen the screw fixing th e ant enna co nne ctor and t wo scr ews f ixing th e P A modu le. Th en ta ke

the PCB out.

2.2 Reassembling the Radio

To reassemble the radio, per f orm the above steps in a reverse way.

UHF1 (400–470 MHz)

80

1

6300109000000

Aluminum chassis

1

27

6100334000000

O-ring for encoder switch

1

2

7500358000000

Heat sink pad

1 28

4399030000020

Rotary switch

1

3

6100492101000

Waterproof ring for front case

1 29

41078001000J0

PCB for control panel

1

4

4210090000200

Signal cable

1 30

6100533101000

Waterproof ring for aluminum chassis

1

5

5208010100010

Connector (male)

1 31

6300126000000

Upper cover of the aluminum chassis

1 6

6001079000000

Light-guide plate for keys

1 32

7103015000000

Machine screw

11

7

7300048000000

Metal dome

1 33

6001080000000

Plastic upper cover

1

8

6100408001000

Waterproof ring for microphone jack

1 34

6100496000000

Conductive silicone rubber for main board

1 9

6100488000000

P+R front panel keys

1 35

7103008000400

Machine screw

2

10

6201893000000

Speaker fixing sheet

1 36

7500272000000

Heat sink pad

2

11

7102606021000

Self-tapping screw

6 37

/

Semi-finished PA with heat sink pad

1

3. Exploded View and Packing Guide

3.1 Exploded View

Part list:

No. Part No. Description Qty. No. Part No. Description Qty.

UHF1 (400–470 MHz)

6

12

4210080000700

Speaker cable (with 2-Pin plug)

1 38

3414999000020

PNP transistor

1

13

5001210000390

Speaker

1 39

/

Main PCB

1

14

7400297000000

Speaker felt

1 40

6100532100000

D_SUB waterproof ring

1

15

7102505000110

Machine screw

3 41

5208026100000

Jack

1

16

6001076000010

Front case for control panel

1 42

6100530100000

Waterproof ring for power socket

1

17

860P580600100

Logo

1 43

5205002100110

Power socket (male)

1

18

6201739000000

Inner lining for knob

1 44

3103994770150

Electrolytic capacitor

1

19

6000876000000

Encoder knob

1 45

7212002500000

Nut

1

20

6100493000000

Power on/off key

1 46

6100531100000

Waterproof ring for antenna connector

1

21

6100404000000

Emergency key

1 47

4401000009000

BNC RF connector

1

22

7500344000000

PORON pad

1 48

6100494000000

GPS soft stopple

1

23

5130000000040

TFT LCD 2. 0" TFT

1 49

7500159000100

Thermal conductive silicone rubber

2

24

6001078000000

LCD bracket

1 50

7500357000000

Heat sink pad

1

25

5202002100270

Board-to-wire connector

1 A

6100574100000

O_ring

11

26

7207003700000

Nut

1 B

7500344000000

PORON pad

1

No. Part No. Description Qty. No. Part No. Description Qty.

Note

Parts that are not mar ked with Part No. may vary with the radio frequency band.

80

3.2 Packing Guide

UHF1 (400–470 MHz)

8

4. Specifications and Blind Spot

4.1 Specifications

General

UHF1 (400–470 MHz)

Frequency Range

Channel Capacity 1024

Group Capacity 64 (each with a maximum of 16 c hannels)

Channel Spacing 12.5 kHz / 25 kHz

Operating Voltage 13.6V±15% DC

Current Drain

Frequency Stability ±2.5 ppm

Antenna Impedance 50 Ω

Dimension s ( H×W×D) 60 mm × 174 mm × 200 mm (2.4 inch × 6.9 inch × 7.9 inch)

400–470 MHz

 Standby: <0. 6 A  Receive: <2.0 A  Transmit: 5 W: <5 A; 25 W: <8 A, 45 W: <12 A

Weight 1.7 kg (3.75 lbs)

LCD Display 220*176 pixels, 262000 colors, 2. 0-inch, 4 rows

Transmitter

 Low: 1–25 W

Power Output

 High: 1–45 W

Conducted/Radiated Emission

FM Modulation

4FSK Digital Modulation  12.5 kHz (data only): 7K70FXD

Modulation Limit

 -36 dBm <1 GHz  -30 dBm >1 GHz

 10K1F3E@12.5 kHz  15K1F3E@25 kHz

 ±2.5 kHz@12.5 kHz  ±5.0 kHz@25 kHz

80

FM Hum and Noise

Spurious Response

Adjacent Channel Power

UHF1 (400–470 MHz)

 40 dB@12.5 kHz  45 dB@25 kHz

 60 dB@12.5 kHz  70 dB@25 kHz

Audio Response

Audio Distortion

Digital Vocoder Type

Digital Protocol

Sensitivity

Adjacent Channel

+1 dB to -3 dB

≤3%

AMBE++ or SELP

ETSI-TS102 361-1, -2, -3

Receiver

Analog:

 0.3 μV (12 dB SIN AD)  0.22 μV (Typical) (12 dB SINAD)  0.4 μV (20 dB SIN AD)

Digital:

 0.3 μV /BER5%

 TIA-603: 65 dB@12.5 kHz/75 dB@25 kHz

Selectivity

Intermodulation

Rejection

Blocking

Hum and Noise

Rated Audio Power

Max. Audio Power  Internal (20 Ω load): 8 W

 ETSI: 60 dB@12.5 kHz/75 dB@25 kHz

 TIA-603: 75 dB@12.5/25 kHz  ETSI: 70 dB@12.5/25 kHz

 TIA-603: 90 dB  ETSI: 84 dB

 40 dB@12.5 kHz  45 dB@25 kHz

 Internal (20 Ω load): 3 W  External (8 Ω load): 7.5 W

10

 External (8 Ω load): 20 W

Rated Audio Distortion ≤ 3%

Audio Response +1 dB to -3 dB

UHF1 (400–470 MHz)

Conducted Spurious Emission

Operating Temperature -30℃ to +60℃

Storage Temperature -40℃ to +85℃

ESD

American Military Standard MIL-STD-810 C/D/E/F/G

Dust & Water Protection IP54

< -57 dBm

Environment

IEC 61000-4-2 (level4) ±8 kV (contact) ±15 kV (air)

Humidity Per MIL-STD-810 C/D/E/F/G Standards

Shock and Vibration Per MIL-STD-810 C/D/E/F/G Standards

GPS (for MD780XG only)

Accuracy specs are for lo ng-term tracking (95th percentile values>5 satellites visible at a nominal

-130dBm signal strength).

TTFF (Time To Fir s t Fix) Cold Start

TTFF (Time To Fir s t Fix) Hot Start

Horizontal Accuracy <10 m

< 60s

<10s

Note

All Spec if ic ations are tested according to applicable standards, and subject to change without not ice due to continuous develop me nt .

UHF1 (400–470 MHz)

80

4.2 Blind Spot

No. Blind Spot (MHz) No. Blind Spot (MHz)

1 403.2 5 414

2 422.4 6 432

3 441.6 7 450

4 460.8 8 468

UHF1 (400–470 MHz)

12

Pin 1 and Pin 10 (accessory

2) compose an accessory identification matrix. Please refer to the

pin Accessory Identification

PTT input for the palm microphone, which is valid at

External audio

60% system max.

Accessory audio output. When “Mic Audio Output” is selected via CPS, this pin will output the

USB data

USB power

This pin provides power supply

a 5 V voltage when accessory identification code is 00|01|10,

puts low level when the

5. Interface Definition

5.1 10-Pin Connector

The 10-pin connector on the front panel is used for audio accessories or dat a cable connection. The definition of each pin is descr ib ed as below.

Pin No.

1

2 PTT input Digital inpu t 3.3 V CMOS

3

Name Type

Accessory identification interface 1

output

Digital inpu t 3.3 V CMOS

Analog output

Signal Electrical

Performance

Load impedance >1 kΩ Vrms=600mV±10%@1

kHz

Description

identifier interface

“10-

Matrix Table” below for detailed

function definitions.

low level.

4 USB_D-

5 GND

6 USB_VBUS

cable-

Ground cable

supply

deviation

USB data

/ /

Power supply: 5 V; current limiting: 500 mA

received audio signal.

When this pin is used for USB function, USB function of DB26 will be disabled.

to the USB accessory. It outputs

and out code is 11.

UHF1 (400–470 MHz)

80

USB data

Press this key, the level

palm microphone is detected or press the key of the palm

HOOK function; when desktop microphone is detected, this pin

Pin 1 and Pin 10 (accessory identifier interface 1) compose

Please refer to the

pin Accessory Identification

The mobile radio is in USB master mode or connected to a USB

Pin No.

7 Mic input Analog input

8 USB_D+

9 HOOK Digital inpu t 3.3V CMOS

Name Type

cable+

Signal Electrical

Performance

Modulation sensitivity Vrms=80mV±10%@1kHz

60%system max. deviation

USB data

Description

Mic input for palm microp hone

When this pin is used for USB function, USB function of DB26 will be disabled.

High level by default ; v alid at low level.

HOOK and MONITOR functions:

changes from high to low. When

microphone, this pin is used for

is used for MONITOR func t ion.

Accessory identification

10

interface 2

10-pin Accessory Ident ification Matrix Table (composed of Pin 1 and Pin 10):

Pin 1 Pin 10 Radio Status

Low level Low level Reserved

Digital inpu t 3.3V CMOS

an accessory identification matrix. “10-

Matrix Table” below for detailed

function definitions.

Low level High level

High level Low level

smart accessory (such as palm microphone with keypad).

The mobile radio is connected to an external speaker (including desktop microphone with earpiece).

UHF1 (400–470 MHz)

14

Pin 1 and Pin 10 (accessory identification interface 2) compose an accessory

matrix. This pin outputs a 5 V voltage when accessory identification code is 00|01|10, and outputs low level

Power output: 13.2 V; output

Pin 1 Pin 10 Radio Status

The mobile radio is in USB slave mode, or it is not connected to any

High level High level

accessory, or it is connected t o a palm microphone without keypad.

5.2 DB26 Accessory Interface

DB26 accessory interface, namely the 26-pin further development i nterface on the rear panel, is mainly used for accessory connection of mobile radio, or compatibility with other interfaces. Users can further develop the radio via this inter face. The figure and definition of each pin is as follows.

Pin No.

Vbus USB

1

power supply

2 Ground

Name Type

Power output

Power supply (grounding)

Signal Electrical

Performance

Power supply: +5V; current limiting: 500 mA

/ /

Description

identification

when the code is 11.

GP5_3

3

(Chan_Act)

4 SWB+

GPIO 5V TTL GPIO. Programmable via CPS.

Power output

Power supply :13.2V±15%;

output current ≤1 A

current: ≤1 A

UHF1 (400–470 MHz)

80

Programmable output pin (“External Horn & Lights” feature by default, programmable via

60% system max.

external MIC. The audio path is valid when the external Mic PTT

60% system max.

Default output is 300 mV. The output signal amplitude can be changed by modifying the

It forms differential output together with SPK+. Max

: 10 W(R=8

USB data

GPIO. Programmable via CPS;

Pin 15 (ACC_IO3) can compose

ccessory identification

Please refer to the

DB26 Accessory Identification

Pin No.

Name Type

5 External Alarm

6 Power Ground

7 TX Audio

8 RX Audio

Analog voltage output

Power supply (grounding)

Analog signal input

Analog signal output

Signal Electrical

Performance

13 V alarm output

/ /

Vrms=80 mV±10%@1 kHz

deviation

Load impedance>1kΩ Vrms=300 mV±10%@1

kHz deviation

Description

CPS).

This pin is used for signal input of

is held down.

“Analog RX Gain” value v ia CPS.

Analog

9 SPK-

output

power output Ω)

10 D+

USB data USB data cable+

cable+

Ground

11 USB_GROUND

/ /

cable

GP5_2

12

GPIO 5V TTL

(Monitor)

13 ACC_IO2 Digital inpu t 5V TTL

External speaker output-

Monitor feature by default.

Accessory identification in terface; high level by default. This pin and

three a statuses. “

UHF1 (400–470 MHz)

16

below for detailed

Emergency switch. This pin is

Pin 13 (ACC_IO2) can compose

ccessory identification

statuses. Please refer to the

DB26 Accessory Identification

function is programmable via

It forms differential output

. Max

power output: 10 W(R=8

USB data

Pin No.

14 Emerg Sw Digital inpu t 5V TTL

15 ACC_IO3 Digital inpu t 5V TTL

Name Type

Signal Electrical

Performance

Description

Matrix Table”

function definitions.

valid when low level is input.

Accessory identification in terface; high level by default. This pin and

three a

“

Matrix Table”” below for detailed

function definitions.

16 PRGM_IN_PTT Digital input 5V TTL

Audio

17 Audio Ground

18 SPK+

19 D-

20 GP5_8

(grounding)

Analog signal output

cable-

Digital input/output

/ /

together with SPK-

Ω)

USB data USB data cable-

5V TTL GPIO. Programmable via CPS.

Programmable input pin (PTT key of external Mic by default; its

CPS). It is valid at low level.

External speaker output+

21 Ground

22 GP5_7

Ground

/ /

cable

Digital

5V TTL GPIO. Programmable via CPS.

input/output

UHF1 (400–470 MHz)

80

radio is in USB slave mode or not

The mobile radio is in USB master mode or connected to a USB

an external speaker (including

Pin No.

23 GP5_6

24

25

26

Note

When a pin is marked with 5 V TTL level, this pin has the pull-up funct ion. If the pin needs t o be set to

Name Type

Digital input/output

AUX Audio Out 1 Analog

output

AUX Audio Out 2 Analog

output

Analog

Ign Sense

voltage

Detect Pin

input

Signal Electrical

Performance

5V TTL GPIO. Programmable via CPS.

Load impedance >1 kΩ Vrms=300 mV±10%

Ignition voltage input >7 V Input pin for ignition voltage

Auxiliary audio (external s peaker ) output 1

Auxiliary audio (external s peaker ) output 2

Description

high level, empty this pin.

DB26 Accessory Identification Matrix Table (composed of Pin 13 and P in 15):

Pin 13 Pin 15 Radio Status

High level High level

High level Low level

Low level High level

Low level Low level Reserved

Default status. The mobile connected to any accesso r y.

smart accessory (such as palm microphone with keypad).

The mobile radio is connected to desktop microphone with earpiece).

5.3 Other Interfaces

J2 (LCD Display Interface)

Pin No. Name Description

1 GND Grounding pin

2 VCI 2.5–3.3 V adjustable port

3 VCI 2.5–3.3 V adjustable port

4 IOVCC 1.65–3.3 V adjustable I/O port

18

Pin No. Name Description

5 FLM Synchronization signal c ontrol port

6 CS Chip select signal

7 RS Register select

8 WR Write signal

9 RD Read signal

10 DB0

11 DB1

12 DB2

13 DB3

UHF1 (400–470 MHz)

14 DB4

15 DB5

16 DB6

17 DB7

18 DB8

19 DB9

20 DB10

21 DB11

22 DB12

23 DB13

24 DB14

Data bus

25 DB15

26 DB16

27 DB17

28 RESET Reset signal

29 IM3 Select data cable

80

Pin No. Name Description

setting the option

Unidirectional output interfaces. They require their input resistances are greater than or

30 IM0

31 LEDA LED anode

32 LED_K1

UHF1 (400–470 MHz)

33 LED_K2

34 LED_K3

LED cathode

J4 (Aviation Interface of Front Panel)

Pin No. Name Description

1 ACC_IO1 Digital input

2 PTT_IN Digital input

3 External_Audio Analog output

4 USB_D- USB data cable

5 GND Ground cable

6 USB_VBUS Power supply

7 MIC_IN Analog input

8 USB_D+ USB data cable

9 HOOK Hook signa l input

10 ACC_IO2 Digital input

J400 (Option Board Interface)

Pin No. Signal Function

1 GPIO1

3 GPIO2

5 GPIO3

7 GPIO4 O

9 GPIO5 RESET-OUT O

GPIO

I/O of the

Radio

I/O

Voltage

(Option Board

VDD=3.3 V)

VIH MIN=0.7VDD VIL MAX=0. 3VDD VOH MIN=0. 8VDD VOL MAX=0.22VDD

Remark

GPIO5: output signal of re board.

GPIO4/GPIO5:

UHF1 (400–470 MHz)

20

AF OB TO

80 mV (standard output from the

to the

AF MB TO

80 mV (standard

board to the option

Pin No. Signal Function

11 UART-TX

13 UART-RX I

UART-CT

15

S

UART-RT

17

S

2 I2C –SDA

4 I2C -SCL O

MCBSP-D

6

R

UART

I2C

I/O of the

O

I

O

I/O

I

Radio

Voltage

(Option Board

VDD=3.3 V)

Remark

equal to 47 kΩ.

UART

I2C

MCBSP-W

8

10

12

14 AGND AGND / / /

16

18

CLK

MCBSP

MCBSP-D X

MCBSP-F SX

AF I

MB

AF O

OB

I/O

O

I/O

option board main board)

output from the main

McBSP: Multi-channel buffered serial port

MAX: 700 mV

MAX: 700mV

19 DGND DGND / / /

20 3V6 or 5V Power O Voltage: 5.0 V /

board)

80

J403 (Pin Interface)

Pin No. Name Description

1 Vbus USB Power supply: +5 V

2 Ground Ground cable

UHF1 (400–470 MHz)

3

4 SW B+ sense Power supply

5 External Alarm Ana lo g voltage output

6 Power Ground Power supply (grounding)

7 Tx Audio Analog input

8 RX Audio Analog output

9 Spkr- Analog output

10 D+ USB USB data cable+

11 USB_GROUDN Ground cable

12

13 ACC_IO2 Digital input

GP5_3

GP5_2

Digital input/output

14 Emerg Sw Digital input

15 ACC_IO3 Digital input

16 PRGM_IN_PTT Digital input

17 Audio Ground Audio ground

18 Spkr+ Analog output

19 D- USB USB data cable-

20

21 Ground Ground cable

22

23 GP5_6 Digital input/output

24 AUX Audio Out 1 Analog output

GP5_8

GP5_7

Input/output

22

Pin No. Name Description

25 AUX Audio Out 2 Analog output

26 Ign Sense Ana lo g voltage input

J404 (Front Panel Interface)

Pin No. Name Description

1 INT_MIC Audio input

2 MIC_GROUND Audio input (grounding)

3 ACC_IO1 Accessory identificatio n interface 1

4 USB_VBUS USB power supply

5 HOOK HOOK

UHF1 (400–470 MHz)

6 PTT PTT

7 USB_D- USB data cable D-

8 USB_D+ USB data cable D+

9 ACC_IO2 Accessory identificatio n interface 2

10 UART2_RXD_A Volume c ont r ol port

11 UART2_TXD_B /

12 EXTERNAL_AUDIO Audio signal out put by accessory (mobile radio)

13 SPKR1+ Speaker audio signal cable+

14 SPKR1- Speaker audio signal cable-

15 5VD Power supply

16 PRST Reset signal

17 KB_C0

18 KB_C1

19 KB_C2

20 KB_C3

21 B_R0

Matrix keyboard

80

Pin No. Name Description

22 B_R1

23 B_R2

24 CSLED Backlight control IC chip select

25 CLOC Backlight control IC clock

26 DATA Backlight control IC data

27 OE_LCD LCD read enable

28 WE_LCD LCD write enable

29 CS2_LCD LCD chip select

30 F_A1_LCD LCD register se lect enable

UHF1 (400–470 MHz)

31 F_D7

32 F_D6

33 F_D5

LCD data bus

34 F_D4

35 F_D3

36 F_D2

37 F_D1

LCD data bus

38 F_D0

39 GND Grounding

40 PWB_IN Power On/Off signal

24

6. Tuning Description

Reference Oscillator

Connect the radio to HP8 921 v ia the ante nna c onn ector, and set H P8921

Adjust the vernier on the Tuner until the frequency offset between the frequency displayed on HP8921 and the frequency (Tx) displayed on

Transmit Power

Connect the radio to HP8 921 v ia the ante nna c onn ector, and set H P8921

> Transmit

Power Calibration” in the left navigation tree. Then select an appropriate

6.1 Required Test Instruments

 Radio communic at io n test sets: HP8921 and A er oflex 3920  Power supply: 15 A/30 V  Multimeter  Tuner software

6.2 Tuning Procedures

UHF1 (400–470 MHz)

6.2.1

After re-assembling the radio, you nee d t o t une it with the Tuner software and HP8921. The specific operations are described in the table below. After tuning the ite m s of the c ur rent channel,

you must switch the radio to t he next c hannel; otherwise, the adjustments will not be sav ed t o t he r adi o properly.

TX Section

Warp

Tuning the Radio

Items Method

1. to TX test mode.

2. Open the Tuner software and go to “TUNE_DATA -> TX -> Reference Oscillator Warp” in the left navigation tree. Then click the “Transmit On” button.

3.

Tuner is less than or equals to ±40 Hz.

4. Click the “Save” butt on on Tuner to save the existing value to the radio.

5. Click the “Transmit Off” button on Tuner.

Calibration

Here takes the tuning of low TX power for example.

1. to TX test mode.

2. Open the Tuner software and go to “TUNE_DATA -> TX -

channel.

80

Items Method

Connect the radio to HP8 921 v ia the ante nna c onn ector, and set H P8921

Adjust the vernier on Tuner until the frequency deviation displayed on

Connect the radio to HP8 921 v ia the ante nna c onn ector, and set H P8921

Click the “Transmit On” button on Tuner. Then set the modulation signal

3. Click the “Transmit On” bu t ton on Tuner. Adjust the power to the required level as follows:

4. Low power: 1 W (for version D/F) Medium power: 25 W High power: 45 W

5. Click the “Save” button on Tuner t o save the existing value to the radio.

1. to TX test mode.

2. Set the parameters on the HP8921 as fol low s: IF Filter: 230 kHz Filter1: <20 Hz HPF

UHF1 (400–470 MHz)

Filter2: <15 kHz LPF

Transmit-to-Deviation

De-Emphasis: off

3. Open the Tuner software and go to “TUNE_DATA -> TX T

ransmit-to-Deviation” in the left nav ig at ion tree. Then click the “Transmit

On” button. Then set the modulation signal of HP8921 to “100 Hz”.

4. HP8921 is “5 kHz”.

5. Click the “Save” button on Tuner t o save the existing value to the radio.

6. Click the “Transmit Off” bu tton on Tuner.

Here takes the low freque ncy deviation for example.

1. to TX test mode.

2. Set the parameters on the HP8 921 as follows:

>

Modulation Balance

IF Filter: 230 kHz Filter1: <20 Hz HPF Filter2: <15 kHz LPF De-Emphasis: off

3. O

pen the Tuner software and go to “TUNE_DATA -> TX -> Modulation

Balance” in the left navigation tree. Then select an appropriate chann el.

4.

26

Transmit Oscillator

Voltage

Connect the radio to HP8 921 v ia the ante nna c onn ector, and set H P8921

> Transmit

Filter” in the left navigation tree. Adjust the vernier on Tuner until the

UHF1 (400–470 MHz)

Items Method

of HP8921 to “100 Hz”.

5. Adjust the value in the dialog box on Tuner until the frequency deviation displayed on HP8921 is “5 kHz ” .

6. Press the Enter key on the keyboard to confirm your settings.

7. Click the “Save” butt on on Tuner to save the existing value to the radio.

8. Click the “Transmit Off” button on Tuner.

1. to TX test mode.

2. Open the Tuner software and go to “TUNE_DATA -> TX Oscillator Voltage” in the l eft navigation tree.

3. Click the “Save” butt on to save the existing value to the radio.

RX Section

Front-end Filter

1. Connect the radio to H P8 921 via the antenna connector.

2. Connect the Audio Out port of the radio to the Audio In port of HP8921, and set HP8921 to RX test mode.

3. Set the parameters on t he HP8921 as follows: Output RF signal: -118 dBm/Frequency (current channel frequency ) Modulation frequency: 1 k Hz Modulation deviation: 3 kHz

4. Open the Tuner software and go to “TUNE_DATA -> RX -> Front-end

“SINAD” value displayed on H P8921 is greater than 14 dB.

5. Set the output RF signa l of HP8921 to -25 Bm/(current channel frequency

-36.675 MHz).

6. Adjust the vernier o n Tuner until the “SINAD” value displayed o n H P8921 is less than 14 dB.

7. Press the Enter key on the keyboard to confirm your settings.

8. Click the “Save” butt on on Tuner to save the existing value to the radio.

1. Connect the radio to HP8921 via the antenna c onn ector , and set HP8 921

Front-end Gain

to RX test mode.

2. Set HP8921 to output an unmodulated RF signal with a value of “-70

80

Items Method

Receive Oscillator

Connect the radio to HP8 921 v ia the ante nna c onn ector, and set H P8921

dBm/Frequency (current channel frequency)”.

3. Press the Enter key on the keyboard to confirm your settings.

4. Click the “Save” butt on on Tuner to save the existing value to the radio.

1. to RX test mode.

2. Open the Tuner software and go to “TUNE_DATA -> RX -> Receive Oscillator Voltage” in the l eft navigation tree.

Voltage

3. Set HP8921 to output an unmodulated RF signal with a value of “-47 dBm/Frequency (current c hannel frequency)”.

4. Click the “Save” butt on to save the existing value to the radio.

6.2.2 Testing the Radi o

UHF1 (400–470 MHz)

After tuning all the items of the radio, you need to test the digital RF signal of the mobile radio via Aeroflex 3920 (Digital Ra dio Test set).

Transmitting

Step 1 Connect the mobile radio to Aeroflex 3920 via the antenna connector. Step 2 Open the T uner software and go to “TEST -> TX -> Transmit B ER (0.153)”. Step 3 Select the channel to be tested and select the corr esponding power level (High Power or Low

Power) in “Parameter” on Tuner.

Step 4 Click the “Transmit On” bu t ton on Tuner. Step 5 Set the parameters on the Aeroflex 3920 as follows:

 Frq: Be consistent with the TX frequency of the c hannel to be tested.  STD IB 511: .153

Step 6 Observe the “avg” v alue of “UUT TX Bit Err” parameter in “UUT Measurement s ” mo dul e of

Aeroflex 3920, which is th e average bit error rate of the tested channel during t r ansmitting.

The radio is operating pro per ly when the Aeroflex 3920 parameters are a s fo ll ow s:

 FSK Error: ≤5%  Symbol Clock Err: ≤100 Hz  Signal Power: 3. 9–4.5W  Magnitude Error: ≤1%  UUT TX Bit Err = 0%

UHF1 (400–470 MHz)

28

Step 7 Click the “Transmit Off” bu tton on Tuner to finish testing.

Receiving

Step 1 Connect the antenna connec t or of the radio to the RF port of Aeroflex 3920, and set A er oflex

3920 as follows (remain default values for other parameters):

 Frq: Be consistent with the frequency of the channe l t o be t ested.  STD IB 511: .153  Lv1 (signal strength): -116 dBm (-11 0 dBm by default)

Step 2 Open the T uner software and go to “TEST -> RX -> Receiver BER (0.153)”. Step 3 Select the channel to be tested and click the “Start” button on Tuner. Step 4 Observe the “Average Rate” displayed on Tuner.

You can set different “Aver age Num” (the calculation base of BER, which is “10” by default) to obtain different “Average Rat e” .

Step 5 Modify the value of “Lv1” par ameter of Aeroflex 3920, so as to obtain the average BERs of the

tested channel under different signal strengths.

The mobile radio is oper at ing properly when the average BER is less than 5% .

Note

When the parameter “ Lv1” is set to “-110 dBm”, the mobile radio is operating properly when the average BER is less than 1% .

Step 6 Click the “Stop” button on Tun er t o finish testing.

UHF1 (400–470 MHz)

81

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part

15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a

residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not

installed and used in accordance with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the

following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help.

This equipment complies with FCC radiation exposure limits set forth for an controlled environment. This

equipment should be installed and operated with minimum distance 100cm between the radiator and your body.

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

This equipment complies with IC RSS-102 radiation exposure limits set forth for an controlled environment. This

equipment should be installed and operated with minimum distance 100cm between the radiator and your body.

Cet équipement est conforme aux limites d'exposition aux radiations IC CNR-102 établies pour un

environnement contrôlé. Cet équipement doit être installé et utilisé avec une distance minimale de 440 cm entre

le radiateur et votre corps.

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Scien ce and Econ om ic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:

(1) This device may not cause inter f erence.

(2) This device must accept any interference, including interference that may cause undesired operation of the device.

L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes :

(1) L’appareil ne doit pas produire de brouillage;

UHF1 (400–470 MHz)

80

(2) L’appareil doit accept er tou t broui llage rad ioélec triqu e sub i, même s i le broui llage e st sus ceptible d’en co mpromet tre le fonctionnement.

Hytera Communications MD78XIU1 Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. Product Controls

Front Panel

Rear Panel

2. Disassembly and Reassembly

2.1 Disassembling the Radio

Step 1 Turn off the radio and remov e t he power cord, and loosen the two screws to remov e t he r adio.

Step 5 Undo the clips on both sides of the radio, and then remove the rear cover.

Step 6 Loosen the eleven screws t o r emov e t he upper shield cover.

2.2 Reassembling the Radio

3. Exploded View and Packing Guide

3.1 Exploded View

3.2 Packing Guide

4. Specifications and Blind Spot

4.1 Specifications

4.2 Blind Spot

5. Interface Definition

5.1 10-Pin Connector

5.2 DB26 Accessory Interface

5.3 Other Interfaces

J2 (LCD Display Interface)

J4 (Aviation Interface of Front Panel)

J400 (Option Board Interface)

J403 (Pin Interface)

J404 (Front Panel Interface)

6. Tuning Description

6.1 Required Test Instruments

6.2 Tuning Procedures

Tuning the Radio

6.2.2 Testing the Radi o

Transmitting

Step 7 Click the “Transmit Off” bu tton on Tuner to finish testing.

Receiving

Step 6 Click the “Stop” button on Tun er t o finish testing.