AN1500A
TABLE OF CONTENTS
1
2
3
4
5
6
7
SCOPE................................................................................................................................................................. 1
KEY FEATURES ................................................................................................................................................. 1
OTHER APPLICABLE DOCUMENTS AND PAPERS........................................................................................ 4
REVISION STATUS............................................................................................................................................. 4
SA2532K PIN LAYOUT ...................................................................................................................................... 4
GENERAL DESCRIPTION.................................................................................................................................. 5
DEMO BOARD CONFIGURATION..................................................................................................................... 5
7.1
SETTING A/B LINE CONNECTION........................................................................................................................ 6
7.2 CONNECTING A HANDSET ................................................................................................................................ 6
7.3 SETTING DIALING MODE................................................................................................................................... 6
7.4
SETTING LINE LOSS COMPENSATION (AGC)...................................................................................................... 6
7.5 AC IMPEDANCE............................................................................................................................................... 6
DESCRIPTION OF KEYBOARD FUNCTIONS................................................................................................... 7
8
8.1 NUMERIC KEYS ............................................................................................................................................... 7
8.2 FLASH KEYS (R,R2)........................................................................................................................................ 7
8.3 LAST NUMBER REDIAL KEY (LNR) .................................................................................................................... 7
8.4 PAUSE KEY (PAUSE)...................................................................................................................................... 7
8.5 TONE / PULSE SWITCHING ............................................................................................................................... 7
8.6 ENTER/M5...................................................................................................................................................... 7
USING THE SA2532K......................................................................................................................................... 8
9
10
11
SLIDING CURSOR PROTOCOL AND PAUSE INSERTION .......................................................................... 9
AC IMPEDANCE OF THE SA2532K ............................................................................................................... 9
11.1 DEMO BOARD MEASUREMENTS: ....................................................................................................................... 9
11.1.1
11.1.2
Definition:............................................................................................................................................... 9
Measurement:...................................................................................................................................... 10
12
SIDETONE CANCELLATION........................................................................................................................ 10
12.1 DUAL SOFT CLIPPING: ................................................................................................................................... 11
12.2 SIDE TONE BALANCE NETWORK:..................................................................................................................... 11
12.3 EXAMPLE:..................................................................................................................................................... 11
13
14
THE DOUBLE WHEATSTONE PRINCIPLE ................................................................................................. 11
13.1 SIDETONE CANCELLATION.............................................................................................................................. 12
13.2 AC IMPEDANCE............................................................................................................................................. 12
FURTHER ADJUSTMENTS .......................................................................................................................... 13
14.1 FREQUENCY RESPONSE SHAPING: TRANSMIT ................................................................................................. 13
14.1.1
14.1.2
Microphone gain setting....................................................................................................................... 13
Tx frequency shaping: ......................................................................................................................... 13
14.2 FREQUENCY RESPONSE SHAPING: RECEIVE ................................................................................................... 14
14.2.1
14.2.2
14.2.3
Receive gain setting: ........................................................................................................................... 14
Rx frequency shaping.......................................................................................................................... 14
Metering pulses filtering....................................................................................................................... 14
15
OFF-HOOK CONDITIONS & DC MASK ...................................................................................................... 15
15.1 LINE CURRENT PATH...................................................................................................................................... 15
15.2 DC MASK PATH............................................................................................................................................. 15
15.2.1
Setting for low DC mask: ..................................................................................................................... 15
15.3 SPEECH MODE .............................................................................................................................................. 16
15.4 DTMF DIALING ............................................................................................................................................. 16
15.5 PULSE DIALING.............................................................................................................................................. 16
15.6 PRE-DIGIT, INTER-DIGIT ,INTER-TONE AND ACCESS PAUSES ............................................................................ 17
16
HOOK TRANSISTOR OPTIONS................................................................................................................... 17
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sa m e s
SAMES [ SAMES ]
