Philips FQ1200MK3 application note 1_0 Datasheet

FQ1200MK3/FM1200MK3 FAMILY

Application Note

This document is believed to be correct at the time of publication. Whilst every care has been taken to ensure its accuracy, the copyright owner accepts absolutely no liability for any losses or damages arising from its use.

The copyright owner also reserves the right to change and update this document as and when he sees fit.

Disclaimer

FQ/FM1200MK3 Application note 1

Release Notes

Date Revision Remarks Editor 01/10/2003 1.0.0 First release Sim KP

Release Notes (Evaluation Software)

Date Revision Remarks Editor 01/08/2003 4.8.0.0 Paxton Tan

FQ/FM1200MK3 Application note 2

Tables of contents:

1. Introduction …………………………………… 4

2. Range of Products …………………………………… 4

3. General Block Diagram …………………………………… 5

4. Pinning Information …………………………………… 5

5. Functional Description …………………………………… 6

6. Application information ………………………………… … 7

6.1 Grounding/Layout orientation ………………….. 7

6.2 Antenna socket/Cable requirement ………………….. 8

6.3 Supply requirement ………………….. 8

6.4 I

6.4.1 I

6.4.2 Tuner Programming ………………….. 9

6.4.3 IF Programming ………………….. 13

6.4.4 I

6.5 Specific Pin Connections ………………….. 24

6.5.1 Loading of I

6.5.2 FM AF-L/AF-R ………………….. 24

6.5.3 2

6.5.4 CVBS Output ………………….. 25

6.6 TV Stereo Sound System ………………….. 26

6.7 Approbation ………………….. 26

7. Appendix …………………………………… 27

7.1 Appendix A: TV Auto-tuning flow chart …………. 27

7.2 Appendix B: FM Auto-tuning flow chart …………. 28

7.3 Appendix C: FQ1236 MK3 Noise Figure …………. 29

7.4 Appendix D: Video SNR …………. 29

List of Figures:

Figure 1: General Block Diagram of FQ/FM1200MK3 ………………….. 5 Figure 2: Suggested Layout ………………….. 7 Figure 3: Suggested Supply De-coupling circuit ………………….. 8 Figure 4: I Figure 5: I Figure 6: AF-R/AF-L Pins ………………….. 24 Figure 7: 2 Figure 8: CVBS Output ………………….. 25

2

C Programming requirement ………………….. 9

2

C Bus Structure ………………….. 9

2

C Bus Loading ………………….. 24

nd

IF Sound Output ………………….. 25

2

C Bus Structure ………………….. 9

2

C Programming Examples ………………….. 22

2

C Bus ………………….. 24

ND

Sound IF Output ………………….. 25

FQ/FM1200MK3 Application note 3

This document serves as a guideline to maximize the performance of this module for various applications.

1. Introduction

The FM1200Mk3 and FQ1200Mk3 are the new family of RF video modules family. The MK3 family is the small size front-ends which is designed to meet wider range of RF applications in the areas like PC/TV Multi-Media; LCD TV; PVR and etc. It combines the functions of an all bands tuner, and a Quasi-Split Sound (QSS) IF Demodulation unit. The frontends have a built-in digital (I in to synthesize the tuning voltage, thus making the frontends the true 5V device. The FQ1200Mk3 and FM1200MK3 are complied all the requirements of FCC, CISPR, JIS, DOC (canada) as well as CENELEC (EN55013, EN55020) with respect to input immunity and EMC.

2. Range of Products

Types TV standard / Countries

2

C) PLL tuning system. A DC-DC converter circuit is built-

Input connector/ Mounting

12 NC

FQ1216ME/I H-3 IEC/Horizontal 3139 147 18291

FQ1216ME/P H-3 Phono/Horizontal 3139 147 18771

FQ1216ME/I V-3

FQ1236/F H-3 F/Horizontal 3139 147 18351

FQ1236/P H-3 Phono/Horizontal 3139 147 18761

FQ1236/F V-3

FQ1286/F H-3 F/Horizontal 3139 147 18981

FQ1286/P H-3

FM1216ME/I H-3

FM1236/F H-3

FM1286/F H-3

Note : option for active loop-through; passive loop-through, LNA are available.

CCIR B/G, I, D/K, L/L’ Western Europe, East Asia, China, OIRT countries, France, UK, HK, NZ, Australia

M/N USA, Canada, Latin America, Taiwan, S Korea, Philippines

M/N Japan

CCIR B/G, I, D/K, L/L’ & FM Western Europe, East Asia, China, OIRT countries, UK, France, HK, NZ, Australia

M/N and FM radio USA, Canada, Latin America, Taiwan, S Korea, Philippines

M/N and FM radio Japan

IEC/Vertical 3139 147 19151

F/Vertical 3139 147 19521

Phono/Horizontal 3139 147 20171

IEC/Horizontal 3139 147 18201

F/Horizontal 3139 147 18261

F/Horizontal 3139 147 19011

FQ/FM1200MK3 Application note 4

3. General Block Diagram

TV

antenna

33V

5V

RF AGC

do not connect

Figure 1, General Block Diagram of FQ/FM1200MK3

Vtuning

do not connect

4. Pinning Information

Symbol Pin Description

RF

AGC

Oscillators

MOPLL

+5V

SCL SDA

I2C BUS

IF

* 10.7MHz Filter

Address

Select

Video

SAW Filter

Sound

SAW Filter

IF Demodulator IC

Stereo Decoder

*AF-R

*FM Radio

TDA988X

*FM Radio

*AF-L/

AS IF

CVBS AF2nd IF

+5V

N.C 1 Do not Connected (agc Monitor)

N.C 2 Do not Connected (tuning voltage monitor)

+5V 3 Supply Voltage Vb, Tuner section

SCL 4 I2C – Serial Clock

SDA 5 I2C – Serial Data

AS 6 I2C – Address Select

- 7 Do not Connected

- 8 Do not Connected

N.C/AF-R 9 Do not Connected / FM radio Right channel

IF AS /AF-L 10 I2C – Address Select IF/ FM radio Left channel

2nd Sound IF 11 Second Sound IF output (buffered output)

CVBS 12 Video (buffered output)

+5V IF 13 Supply Voltage, IF section

AF/MPX 14 AF/MPX TV sound output

FQ/FM1200MK3 Application note 5

5. Functional Description

The FQ/FM1200 Mk3 frontend consists of a 3-band tuner that can tune to all channels between 48 and 863 MHz covers all types of TV systems, and an IF system using QSS demodulation concept, designed on a single double-sided Printed Circuit Board. The whole assembly is mounted in a steel folded frame for good EMC performance.

TV Tuner

The tuner section is equipped with 3 tuned RF high-gain MOSFET stages in the input section, ensuring low noise and good inter-modulation performance. The gain control voltages of the MOSFETs are by the wideband AGC voltages generates from the tuner IC when it detects the level of the IF output. The AGC take-over point and the time constant are selectable by the I bus. A band-pass filter, suitably narrow with a 3dB bandwidth of 8-12 MHz, ensures good suppression of unwanted spurious channels. The mixer-oscillator functions are based on an IC which offers good intermodulation and suppression of oscillator harmonics. An IF amplifier provides some gain conversion to drive the SAW filter directly in the IF section. The tuning and bandswitching is done with a digital programmable PLL tuning system contained in the synthesizer IC. The DC-DC converter is built around this IC to provide the required tuning voltages, making the FQ/FM1200 Mk3 frontends the true 5V devices. The FM radio is integrated with the TV VHF Low band tuner. When switched to FM Radio mode, the tuner RF bandwidth is reduced to about 2.5MHz. IF section

The IF is designed base on the Philips Semiconductor IF demodulator IC TDA9885/6/7 depend on the versions. It is a true synchronous demodulation, alignment–free multistandard (PAL, SECAM and NTSC) IC for positive and negative modulation via I including AM and FM works on the principle of Quasi Split Sound (QSS) processing. For demodulating the video IF, an extremely linear synchronous PLL demodulator is utilised. Its offers very linear demodulation good intermodualtion, reduce harmonics, and excellent pulse response. The IF selectivity is provided by a Video Surface-Acoustics Wave (SAW) filter, and split Sound SAW filter for the different TV systems. The PLL demodulator is fitted with an Automatic Frequency Tuning (AFT) detector which allows for fine tuning of the picture carrier to the nominal IF. FM Radio, a separate 10.7MHz IF bandpass filter is connected to the FM input of the TDA9887 IF IC at pin 13. FM radio demodulation is controlled via I to TDA7040 Stereo decoder IC where the L and R audio channels are decoded. The 2nd IF sound signal at pin 11 is intended for Stereo/NICAM sound decoding. The 2nd IF sound output is buffered and it can be connected directly to the NICAM/Multi system DSP sound IC.

2

C-bus. The sound IF

2

C. The FM MPX sound is connected

2

C

FQ/FM1200MK3 Application note 6

6. Application information

6.1 Grounding / Layout Orientation

The FQ1200 MK3 and FM1200 MK3 modules are housed in a metal enclosure that has two function: firstly, preventing the Local Oscillator signals from radiating into the environment and secondly, preventing unwanted RF signals from entering the module and disturbing the wanted signals to be received. The second function is most critical, since the PC environment is an extremely “polluted” one with a plethora of clock and control signals. The fundamental and harmonic frequencies of many digital signals extend below and beyond the frequency range in use for TV broadcasts. Due to their very high levels, they can easily leak into the frontend and create interference with the wanted TV signals. To prevent this from happening, it is recommended not to place the digital radiators, especially the VGA and video decoder ICs in close proximity to the frontend. And the crystals that associated to Video decoder and sound decoder should not place near to the frontend. Care must also be exercised regarding the length of PWB tracks going to the pins of the frontend. At certain frequencies, long PWB tracks act like micro-strip lines, presenting a low impedance to the frontend terminals, so that the internal decoupling capacitors on the terminals are no longer effective. It is essential that a separate analogue ground system be established for the frontend. A ground plane under the frontend is recommended. All tracks carrying digital signals should not be run underneath the frontend. Connections between the analogue and digital ground should be made only via RF chokes. In addition, the analogue ground plane should be in contact with the chassis ground via the slot bracket screw contacts. The most optimum layout configuration is obtained when the antenna connector of the frontend protrudes from the back of the PC chassis when the TV card is installed. This ensures that the RF signal connection is made directly to the frontend. The use of a extra antenna adapter or cable will degrade the quality of the RF signal. Also it is very critical that the frontend is not located next to any digital device in an adjacent card that radiates a lot of spurious signals into the environment. See Fig 1

Figure 2,. Suggested card Layout

Crystal

Stereo

deocder

Video decoder

Crystal

FQ/FM1200MK3 Application note 7

6.2 Antenna socket / Cable requirement

To prevent excessive loss of signal and picking up of spurious signals under sub-optimal conditions, the antenna cable must be of good quality. A recommended type is the RG-59BU with a characteristic impedance of 75 ohm (preferable double shielded). This has a specified maximum loss of 4.6 dB at 1GHz.

The antenna connector must be properly crimped or soldered to the cable. F and IEC connector are recommended as their characteristics are closer to 75 ohm than the RCA (frequently called standard phono) type. This will ensure an optimum matching to the antenna wall outlet and the frontend.

6.3 Supply requirements

The FQ/FM1200 Mk3 is the true 5V device. For optimum protection against unwanted pick-up, it is recommended that a series choke of 10 nH and a large Elcap (100 uF) be placed at pins3 and 13. See figure 2. The maximum allowable ripple is 5 mVpp in the frequency range 20 Hz to 100 kHz and 10 mVpp from 100 kHz to 500 kHz. . Ideally the frontend should be powered by a separate voltage regulator which is capable of sourcing at least 310mA (150mA for tuner part and 160 mA for the IF part). The frontend works best with a nominal voltage of +5V. It should be verified that the supply voltage at the pins 3 and 13 is at least 4.75V.

It is imperative that good grounding techniques be employed in order to prevent conducted radiation from the digital decoder IC through the analogue/digital grounding.

100uF 100uF

0.1uF

5V Input5V Input

Pin 3Pin 13

0.1uF

10uH

Figure 3, Suggested Supply de-coupling circuit

+5V

FQ/FM1200MK3 Application note 8

6.4 I2C Bus Programming

For information regarding general aspects of I²C bus control see published by Philips Semiconductors under 12NC : 9398 393 40011

The next section provides programming information specific to the FQ/FMI1200 Mk3 modules.

6.4.1 I

The FQ/FM1200 MK3 contains two I section. It is imperative to ensure that both I

2

C Bus Structure

2

C transceivers, one in the tuner section and one in the IF

2

C devices are programmed correctly according to

their address.

10 6 5 4

AS IF AS

Figure 4, I2C Bus Structure

Tuner SectionIF Section

2

C Bus

I

6.4.2 Tuner Section Programming

6.4.2.1 Logic Diagram

(WRITE Mode , R/W = 0)

'The I2C-bus and how to use it',

MSB LSB ACK

Address Byte ADB 1 1 0 0 0 MA1 MA0 R/W=0 A

Divider Byte 1 DB1 0 N14 N13 N12 N11 N10 N9 N8 A

Divider Byte 2 DB2 N7 N6 N5 N4 N3 N2 N1 N0 A

Control Byte CB 1 CP T2 T1 T0 RSA RSB OS A

Bandswitch Byte BB P7 P6 P5 P4 P3 P2 P1 P0 A

Auxiliary Byte AB * ATC AL2 AL1 AL0 0 0 0 0 A

*Note : By default, it is set to AL2=0, AL1=1,ALO=0. This sets the tuner AGC TOP to 112dB

µV upon

power –on reset.

FQ/FM1200MK3 Application note 9

6.4.2.2 Address Byte (MA1, MA0)

Voltage at Pin 6 of the tuner (AS pin) Address MA1 MA0

0 - 0.5 V C0 0 0

1.0 – 1.5 V C2 0 1

2.0 – 3.0 V C4 1 0

4.5 – 5.0 V C6 1 1

If the AS pin (pin 6 of the tuner) is left floating, or not connect to any voltage, the internal biasing will automatically set the address to C2.

6.4.2.3 Programmable Divider Setting (Byte 1 and Byte 2)

Divider ratio: N = f

Where f

OSC

= f

RF. PC

Thus, N = 8192*N13 + 4096*N12 + 2048*N11 + 1024*N10 + 512*N9 + 256*N8 + 128*N7 + 64*N6 + 32*N5 + 16*N4 + 8*N3 + 4*N2 + 2*N1 + N0

For : FQ/FM1216ME MK3, f FQ/FM1216ME MK3, f FQ/FM1236MK3, f FQ/FM1286MK3, f

and : FM radio, f

6.4.2.4 Control Byte CB

6.4.2.4.1 Charge Pump Setting:

CP can be set to either 0 (low current) or 1 (high current). CP = 1 results in fastest tuning CP = 0 in moderate speed tuning with slightly better residual osc FM.

For TV mode, it is recommended to set CP=1. The only exception allowed is when fine tuning under viewing conditions, then a low current CP=0 should be selected, but returning to CP=1 immediately after completion of fine tuning.

For FM radio mode, it is recommended to set CP=0 at all times.

/ fSS

OSC

+ f

MHz and fSS = step size set by RSA and RSB

VIF

= 38.9MHz B/G, D/K, I, L mode

VIF

= 33.9MHz L’ mode

VIF

= 45.75MHz NTSC USA

VIF

= 58.75MHz NTSC Japan

VIF

= 10.7MHz

VIF

FQ/FM1200MK3 Application note 10

6.4.2.4.2 Test Mode Setting:

Mode T2 T1 T0

Normal operation (default) 0 0 1

Byte AB will follow byte BB (otherwise BB Byte will follow) 0 1 1

It is default to set test bits at normal operation mode. The only exception when AB byte is used, this is necessary when at TV mode, the AGC time constant ( bit ATC ) and AGC TOP (bits AL2, AL1, AL0 ) should change to recommended values. (refer to AB bytes)

6.4.2.4.3 Ratio Select Bits

Frequency step size (f

) RSA RSB

SS

50kHz For FM tuning 0 0

31.25kHz For slow TV tuning 0 1

166.7kHz 1 0

62.5kHz For normal TV tuning 1 1

6.4.2.4.4 PLL Disabling

OS

For normal operation 0

Disable PLL tuning

1

6.4.2.5 Bandswitch Byte CB

P7 P6 P5 P4 P3 P2 P1 P0

TV Low Band X X X 0 0 0 0 1

TV Mid Band X X X 0 0 0 1 0

TV High Band X X X 0 0 1 0 0

FM band Stereo X 0 X 1 1 0 0 1

FM Band Mono X 1 X 1 1 0 0 1

FQ/FM1200MK3 Application note 11

6.4.2.6 Auxiliary Byte AB

6.4.2.6.1 AGC Time Constant (ATC Byte)

ATC

AGC time constant = 2sec (recommended setting for all TV Systems and FM radio) 0

AGC time constant = 50msec (Not recommended setting) 1

6.4.2.6.2 AGC TOP Setting

IF Output Level AL2 AL1 AL0

115 dBµV 0 0 0

112 dBµV Default mode at POR 0 1 0

109 dBµV 0 1 1

106 dBµV Recommended for PAL B/G, D/K, I & NTSC & FM 1 0 0

103 dBµV Recommended for only L/L’ 1 0 1

6.4.2.7 Logic Diagram (READ MODE R/W = 1)

Address Byte ADB 1 1 0 0 0 A1 MA0 R/W=1 A

Status Byte SB POR FL 1 1 AGC A2 A1 A0 A

The following data can be read from the device through the status byte:

6.4.2.7.1 POR (power on reset)

The POR bit = 1, at power-one

6.4.2.7.2 FL (PLL Lock Flag)

FL = 1, when the phase lock loop is in lock The loop must be phase-locked during at least 8 consecutive periods of the internal 7.8125 kHz reference-frequency (ie. 1msec respectively) before the FL flag internally will be raised to 1.

MSB LSB ACK

:

FQ/FM1200MK3 Application note 12

6.4.2.7.3 AGC : Internal AGC flag

AGC

Internal AGC is Non-active 0

Internal AGC is active 1

6.4.2.7.4 A2, A1, A0

Used for indicating if the FM radio signal received is in Stereo or Mono mode. These bits do not apply to TV mode.

A2 A1 A0

FM Radio Stereo mode 1 0 0

FM Radio Mono mode 0 X X

6.4.3 IF Section Programming

6.4.3.1 Logic Diagram (WRITE Mode, R/W = 0)

2

I

C bus format to write (slave receives data)

S SLAVE ADDRESS R/W= 0 A SAD

DATA

AN P

BIT FUNCTION

S START condition, generated by the master

Standard SLAVE ADDRESS See table 1

R/W = 0 Write command, generated by the master

A Acknowledge, generated by the slave

SUBADDRESS (SAD) See table 2 and 3

DATA 8 bits data words, transmitted by the master, See table 4,5,6

AN Acknowledge not, generated by the master

P STOP condition

FQ/FM1200MK3 Application note 13

6.4.3.2 Standard SLAVE ADDRESS

Table 1, Slave address

Value (hex) A6 A5 A4 A3 A2 A1 A0 R/W

86 1 0 0 0 0 1 1 0

84 1 0 0 0 0 1 0 0

Default address = 86 (hex), pin 10 open Alternate address = 84 (hex), 2

ground.

6.4.3.3 SUBADDRESS (SAD)

There are 3 byte of data can be transmitted, such as B data; C data and D data. SAD is used to point to desired data to be transmitted. If more than 1 byte of data is transmitted, then autoincrement is performed; starting from the transmitted sub-address and auto-increment of subaddress in accordance with the order of table below is performed.

Table 2, Definition of the subaddress (second byte after slave address)

Function

nd

tuner for PIP application. Pin 10 connect a 2k2 resistor to

MSB LSB

(1)

D7

D6 D5 D4 D3 D2 D1 D0

Switching (B DATA) 0 0 0 0 0 0 0 0

Adjust (C DATA) 0 0 0 0 0 0 0 1

Data (E DATA) 0 0 0 0 0 0 1 0

(1): D7 = 1 is not allowed.

Table 3, Examples for more than 1 byte of data is transmitted (auto-increment is performed)

S Slave address R/W SAD DATA DATA DATA P

00 B C E

01 C E

02 E

FQ/FM1200MK3 Application note 14

6.4.3.4 Description of the various Data bytes

6.4.3.4.1 B Data

Table 4, Definition of B data

Bit Values Description

Remarks

L’ Sound Switch

B7

B6

B5

B4, B3

B2 = 1 QSS Mode

B1

B0 = 0 Sound trap active

6.4.3.4.2 C Data

Table 5, Definition of C data

= 1 = 0

= 00 = 10

= X1

= 1 = 0

L’ Sound B/G, I,D/K, L ,M/N Sound

FM sensitivity setting High sensitivity Normal sensitivity

Force audio mute On Off

TV standard Modulation and radio mode Positive modulation Negative modulation FM radio

Mute of FM AF outputs Active Inactive

Only for FM auto-tuning

L/L’ B/G,D/K,I, M/N

Recommended

Bit Values Description Remarks

Audio gain

C7

C6

C5

C4 to C0

**: Incase the for BTSC; SAP and FM radio applications, the de-emphasis must be switched OFF.

= 1 = 0

=10000

- 6dB 0dB

De-emphasis time constant 50µs 75

µs

De-emphasis On Off

Tuner AGC Take over point setting Not applicable

FM Stereo only For all TV mode

PAL B/G, D/K,I NTSC M/N

PAL B/G, D/K, I L/L’, NTSC M/N, FM**

Default setting

FQ/FM1200MK3 Application note 15

6.4.3.4.3 E Data

Table 6, Definition of E data

Bit Values Description Remarks

E7

E6

E5

E4, E3, E2

E1, E0

VIF AGC Output

= 0

= 1

= 1 = 0

= 000 = 001 = 010 = 100

= 00 = 01 = 10 = 11

Off

L standard PLL gating HIGH Gating in case of 36% positive modulation

IF gain Minimum Normal

Video IF Frequency

= 58.75MHz

f

VIF

f

= 45.75MHz

VIF

= 38.9MHz

f

VIF

= 33.9MHz

f

VIF

Sound carrier frequency

= 4.5MHz

f

FM

f

= 5.5MHz

FM

= 6.0MHz

f

FM

= 6.5MHz

f

FM

For all setting

FM mode TV mode

NTSC Japan NTSC B/G, D/K, I, L L’

NTSC M/N PAL B/G PAL I PAL D/K, L ,L’

FQ/FM1200MK3 Application note 16

6.4.3.4.4 For convenience, the programming has been consolidated as a single table

6.4.3.4.4.1 TV mode FQ1216ME MK3

Sound Intercarrier

E

0

E

1

E

2

1

0

1

0

1

0

1

0

1

0

X

Video IF

IF Gain

L/L’ PLL Gating

VIF AGC Output

TOP Adjustment

De-Emphasis

De-Emphasis Time

Audio Gain

Video Trap Bypass

Auto Mute FM

Carrier Mode

E

3

E

4

E

5

E

6

E

7

C

0

C

1

C

2

C

3

C

4

C

5

C

6

C

7

0

B

1

B

2

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

X

0

X

FM Mode

TV Modulation

Forced Mute Audio

Not Used (OP1)

L/L’ Sound (OP2)

Description

B

3

4

5

6

7

Bits

0

1

0

B/G

0

1

0

I

0

1

0

D/K

TV

0

L

Systems

0

1

L’

X

1

X

Force Audio Mute

B

FQ/FM1200MK3 Application note 17

6.4.3.4.4.2 TV Mode FQ1236 MK3 / FQ1286 MK3

Sound Intercarrier

E

0

E

1

E

2

0

1

0

1

X

Video IF

IF Gain

L/L’ PLL Gating

VIF AGC Output

TOP Adjustment

De-Emphasis

De-Emphasis Time

Audio Gain

Video Trap Bypass

Auto Mute FM

Carrier Mode ***

E

3

E

4

E

5

E

6

E

7

C

0

C

1

C

2

C

3

C

4

C

5

C

6

C

7

0

B

1

B

2

0

1

0

1

0

1

0

1

0

1

0

1

0

X

0

X

B

3

4

5

6

7

Bits

FM Mode

TV Modulation

Forced Mute Audio

OP1 (Not used)

OP2 (Not used)

Description

0

1

0

X

M

0

1

0

X

M / Japan

TV

Systems

X

1

X

Force Audio Mute

FQ/FM1200MK3 Application note 18

6.4.3.4.4.3 FM Radio mode

Sound Intercarrier

Video IF

IF Gain

L/L’ PLL Gating

VIF AGC Output

E

0

E

1

E

2

E

3

E

4

E

5

E

6

E

7

C

0

C

1

X

1

X

0

X

1

X

0

X

1

X

0

X

1

X

0

X

0

X

TOP Adjustment

De-Emphasis

De-Emphasis Time

Audio Gain

Video Trap Bypass

Auto Mute FM

Carrier Mode

FM Mode

TV Modulation

Forced Mute Audio

FM Sensitivity (OP1)

L/L’ Sound (OP2)

C

2

C

3

C

4

C

5

C

6

C

7

0

B

1

B

2

B

3

B

4

B

5

B

6

B

7

0

1

0

X

1

X

1

X

1

X

0

X

0

1

0

X

1

X

1

X

0

X

0

1

0

X

1

X

1

X

0

1

X

0

1

0

X

1

X

1

X

0

X

1

X

Stereo

Bits

Description

Mono

High Sensitivity

FM

Normal Sensitivity

Force Audio Mute

FQ/FM1200MK3 Application note 19

6.4.3.5 LOGIC DIAGRAM (READ MODE , R/W =1)

2

C bus format to Read (Slave transmits data)

I

S SLAVE ADDRESS R/W= 1 A DATA AN P

BIT FUNCTION

S START condition, generated by the master

Standard SLAVE ADDRESS See table 7

R/W = 1 Read command, generated by the master

A Acknowledge bit, generated by the slave

DATA 8 bit data words, transmitted by the slave, see table 8

AN Acknowledge-not bit, generated by the master

P STOP condition

The master generates an acknowledge when it has received the data word READ. The master next generates an acknowledge, then slave begins transmitting the data word READ, and so on until the master generates no acknowledge and transmits a STOP condition.

6.4.3.6 Standard SLAVE ADDRESS

Table 7, Slave address

Value (hex) A6 A5 A4 A3 A2 A1 A0 R/W

87 1 0 0 0 0 1 1 1

85 1 0 0 0 0 1 0 1

Default address = 86 (hex), pin 10 open Alternate address = 84 (hex), 2

nd

tuner for PIP application. Pin 10 connect a 2k2 resistor to

ground.

6.4.3.7 Description of the various Data bytes

Definition of the transmitted byte Data D, after read condition (status register)

Function D7 D6 D5 D4 D3 D2 D1 D0

Read

AFCWin

VIFL FMIFL AFC4 AFC3 AFC2 AFC1 POR

FQ/FM1200MK3 Application note 20

6.4.3.7.1 Power-on reset POR

POWER-ON RESET

D0

After power-on reset or after supply breakdown

After a successful reading of the register

6.4.3.7.2 Automatic frequency control

f

D4 D3 D2 D1

VIF

fo - 187.5kHz ≥

0 1 1 1

fo - 162.5kHz 0 1 1 0

fo - 137.5KHz 0 1 0 1

fo - 112.5kHz 0 1 0 0

fo - 87.5kHz 0 0 1 1

fo - 62.5kHz 0 0 1 0

fo - 37.5kHz 0 0 0 1

fo - 12.5kHz 0 0 0 0

fo + 12.5kHz 1 1 1 1

1

0

fo + 37.5kHz 1 1 1 0

fo + 62.5kHz 1 1 0 1

fo + 87.5kHz 1 1 0 0

fo + 112.5kHz 1 0 1 1

fo + 137.5kHz 1 0 1 0

fo + 162.5kHz 1 0 0 1

≥ f

+ 187.5kHz

o

Note: f

is the nominal frequency of f

o

For PAL is 38.9MHz and NTSC is 45.75MHz

VIF.

1 0 0 0

6.4.3.7.3 FM IF Level detection

FM IF Level detection D5

FM Detection 1

No FM detection 0

FQ/FM1200MK3 Application note 21

6.4.3.7.4 VIF LEVEL window

VIF LEVEL D6

VIF HIGH LEVEL (Above 25dBuV RF input) 1

VIF LOW LEVEL (Below 20dBuV RF input) 0

6.4.3.7.5 AFC window

AFC WINDOW D7

VCO inside AFC window (Within +/- 1.6MHz) 1

VCO outside AFC window (Outside +/- 1.6MHz) 0

6.4.4 I2C Bus Programming examples

6.4.4.1 Examples 1, tune to PAL B/G (at 471.25MHz)

FQ/FM1200MK3 Application note 22

6.4.4.2 Examples 2, tune to SECAM L mode (at 471.25MHz)

6.4.4.3 Examples 3, tune to FM Radio mode (at 98.0MHz)

FQ/FM1200MK3 Application note 23

6.5 Specific pin Connections

6.5.1 Loading of I

The SDA and SCL lines are already contain series impedances of 200 Ohms and parallel capacitances of 22 pF inside the module. Therefore, Care must be taken to ensure that the total load on the I to use it”

IF Section

Tuner Section

Figure 5, I2C loading

6.5.2

Stereo

Decoder IC

Figure 6, AF-R/AF-L Pins

2

C Bus does not exceed that mentioned in the I2C brochure “ The I2C-bus and how

AF-R / AF-L (Pin9 /pin 10)

5V

5k

2

C Bus (pins 4/5)

12n

200ohms

22pF

Pin 9/10

AF-R/AF-L

2

I

C-Serial Clock

Pin 4

Pin 5

2

C-Serial Data

I

FQ/FM1200MK3 Application note 24

6.5.3 2nd IF Sound Output (pin11)

The 2nd IF Sound is intended for the Stereo Sound applications.

5V

10R

Pin 11

nd

2

IF Sound

820R

Figure 7, 2nd IF Sound Output

6.5.4 CVBS Load (Pin 12)

A video buffer is built into the frontend to enable the module to drive a 75ohms load directly.

5V

10R

100R

75R

220R

Pin 12

CVBS

Figure 8, CVBS Output

FQ/FM1200MK3 Application note 25

6.6. TV Stereo Sound System

nd

TV System Sound carrier 2

5.5 MHz 5.742 MHz FM-Stereo (A2) Germany; Malaysia

B/G

5.5 MHz 5.85 MHz FM-Mono/ NICAM

I 6.0 MHz 6.552 MHz FM-Mono/ NICAM UK, Hong Kong

6.5 MHz 6.258 MHz FM-Stereo (A2, D/K1) Slovak. Rep

D/K

6.5 MHz 5.85 MHz FM-Mono/ NICAM China, Hungary

L 6.5 MHz 5.85 MHz AM-Mono/NICAM France

4.5 MHz 4.724 MHz FM-Stereo (A2) Korea

Sound Carrier Sound Modulation Remarks

Scandinavia, Singapore

M

4.5 MHz - FM-FM(EIA-J) Japan

4.5 MHz - BTSC-Stereo + SAP USA, Taiwan

The above table show the different audio systems used in the various TV Systems. The FQ/FM1200 MK3 can provide the necessary applications to recover the Stereo audio output. The AF output at pin 14 provides the TV mono audio signal as well as the AM-MPX signal for the BTSC and EIA-J. There are ICs that support the BTSC and EIA-J Stereo sound. Philips Semiconductors, the TDA9850/9852/9855 series and the SBX1637A/SBX1673 modules from SONY, can be connected directly from pin 14 of FQ/FM1200MK3.

For other Audio systems, like NICAM and 2 Carrier FM Stereo, the 2

nd

Sound IF at pin 11 which is internally buffered, it can be AC-coupled directly to the input of the specific ICs for Stereo sound decoding. Philips Semiconductors IC TDA9874/9875 and SAA7284 are able to take in the 2

nd

Stereo sound decoding. The SAA7134 Video/PCI decoder has the function of Stereo sound decoding for NICAM/ FM-FM (A2), The SAA7133 Video/PCI decoder has the function of BTSC and EIA-J Stereo Sound decoding

nd

using 2

Sound IF input.

6.7 Approbation

The FQ/FM1200 MK3 family fulfils a wide range of regulations including FCC, CISPR, JIS, DOC, BZT and CENELEC (EN55013 and EN55020). However, the final approbation is always given for the complete receiver unit like, TV set, TV box, PC equipped with a TV/PCA card. Basic requirement for FCC compliance is the tuner Noise Figure of less than 14dB.

Sound IF for

FQ/FM1200MK3 Application note 26

7.0 Appendix

7.1. Appendix A: Recommended TV Auto-tuning flow chart

Start

Tune to first channel

(eg.48.25MHz/ PAL

System)

Read Lock Bit FL

from PLL Status Byte

Stop

Tune to new frequency

IS frequency

yes

above last

channel?

no

Increment frequency

by 0.25MHz

Is PLL Locked

no

(Status Byte

Delay 50ms.

Read AFC

Bits(D4;D3;D2;D1)

and VIFL bit

Is AFT within

62.5kHz window and VIFL= ?1

FL=1)?

yes

Increment frequency

by one channel

Store current channel

FQ/FM1200MK3 Application note 27

7.2 Appendix B: Recommended FM Auto-tuning flow chart

Tune FM to

new frequency

Start

Tune FM

from 87.5MHz

Counter = 0 Iteration = 0

Iteration = Iteration+1

Read PLL Locked Byte

no

Is PLL Locked

( FL=1)?

yes

no

Is frequency >

108MHz?

Increment frequency

by 100kHz

Store current channel

yes

Stop

no

Counter > 8 ?

Delay 50ms

Read AFC

Bits(D4;D3;D2;D1)

and FMIFL bit

Is AFT within

+/-62.5kHz window

and FMIFL= 1?

yes

Counter = Counter+1

yes

Iteration >10 ?

no

FQ/FM1200MK3 Application note 28

7.3 Appendix C: FQ1236 MK3 Noise Figure (FCC)

TUNER NOISE FIGURE FQ1236MK3

16

14

12

10

8

6

4

Noise Figure dBe

2

0

5

2

55.

5

2

83.

121.25

145.25

175.25

247.25

Frequency (MHz)

313.25

409.

25

471.25

549.25

723.25

801.25

7.4 Appendix D: Video SNR (CCIR 567 Weighted) Vs RF Input Level

VIDEO SNR vs INPUT SIGNAL (wgt acc CCIR 567, colourbar)

60

50

40

30

SN (dB)

20

10

0

20 30 40 50 60 70 80 90 100

Input Signal (dBuV)

FQ/FM1200MK3 Application note 29