Texas Instruments Incorporated - 26 -
GC3021A 3.3V MIXER AND CARRIER REMOVAL CHIP SLWS137A
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6.5 QAM DEMODULATOR
The GC3021A chip can be used for carrier removal high speed digital modems. Examples include
digital microwave links and HDTV systems. For details in using the GC3021A chips in a digital modem
contact GRAYCHIP for the application note: BUILDING DIGITAL PSK AND QAM DEMODULATORS,
August 17, 1994.
6.6 DIAGNOSTICS
Eight diagnostic tests are defined on the following pages. Note that the CIN input to the chip must
be grounded.
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GC3021A 3.3V MIXER AND CARRIER REMOVAL CHIP SLWS137A
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# GC3021A diagnostic test A
#
# This test uses odd parity map.
#
for (i=0;i<256;i++) write (base+i) odd_parity(i);
#
# where odd_parity(i) is 0x9669 if "i" contains an odd number of bits
# and is 0x6996 otherwise (e.g., base + 0 = 0x6996, base + 1 = 0x9669, etc)
# control register settings:
write 0 0x0002
write 1 0x8b6e
write 2 0x5fef
write 3 0x0000
write 4 0x00bf
write 5 0x0082
write 6 0x0000
write 7 0x0000
write 8 0x1fff
write 9 0x1fff
write 10 0x1fff
write 11 0x1fff
write 12 0xff22
write 16 0x0000
write 17 0x0000
write 18 0x0000
write 19 0x0000
# perform snapshot
write 12 0xff22
write 12 0xff26
# wait until bit 3 (0x0008) of register 12 goes high
# the snapshot should be:
0xfa85 0xf800 0x01f0 0xf800 0xfa7d 0xf8f5 0xfa73 0xfffc
0xf800 0xfffc 0xf800 0x03d5 0xf800 0x071f 0x07ff 0x07ff
0x01f6 0x07ff 0x01fa 0x07ff 0x01fb 0x07ff 0x07ff 0x0740
0x05b1 0x0745 0x05b5 0x074b 0x05bb 0x0752 0x05c0 0x0757
0x07ff 0x0000 0xfa34 0xf800 0xf800 0xf894 0xfdf0 0xf800
0x020b 0xf800 0xf800 0xf885 0xfa1a 0xfbec 0xfa16 0xfbe9
0xf800 0xfbe8 0xfde8 0xf800 0xfde6 0xf800 0xfde3 0xf800
0xfde3 0xf800 0xfddf 0xfffc 0x0605 0x07ff 0x07ff 0x07b7
0xf800 0xfc36 0xf800 0x03ca 0xf800 0x0708 0x07ff 0x07ff
0xfe09 0x07ff 0x01f1 0x07ff 0x01f3 0x0722 0x01f8 0xfc23
0x07ff 0xfc1f 0x07ff 0xfc1c 0x07ff 0xfc17 0xfa51 0xf8c1
0x07ff 0xf8ba 0x07ff 0xf8b4 0x07ff 0xf8af 0x07ff 0xf8a8
0x05c8 0xf800 0xf800 0xfbfd 0x0208 0x0767 0x07ff 0xfffc
0x07ff 0xfbf3 0xfa1e 0xf882 0x07ff 0x07ff 0x07ff 0x07ff
0xfa11 0x07ff 0x07ff 0xfbe4 0x07ff 0xfbe0 0x07ff 0xfbdc
0x07ff 0xfbdb 0x07ff 0x07ff 0x07ff 0x042b 0xfde1 0xf848
0x0190 0xfcf2 0x06a8 0xf89d 0x0191 0xf801 0xf828 0xfa57
0xfb90 0xfa57 0xf95c 0xfcef 0xf95c 0xfffe 0x0471 0x0762
0xfb8d 0x0762 0xfb8e 0x0762 0xfb8e 0x0763 0x07d7 0x07ff
0xfe6f 0x07ff 0xfe6f 0x07ff 0xfe70 0x07ff 0xfe70 0x07ff
0x018e 0x05a8 0x0190 0xfcf3 0xf95b 0xf801 0xf958 0xfa5a
0xfb8e 0xfcf3 0xfe73 0x0002 0xf828 0xf89c 0xf828 0xf89c
0xfe72 0xf89d 0xf959 0xfcf2 0xf959 0xfcf3 0xf958 0xfcf3
0xf959 0xfcf2 0xf958 0xfa57 0xfe6f 0x030d 0x06a5 0x07ff
0x07d7 0x0763 0x0470 0x0310 0x07d7 0x0001 0xfe73 0xfa5a
0x06a8 0xfa5a 0x0473 0xf89e 0x0473 0xf801 0xf959 0xfcef
0xf95c 0xfcef 0xf95b 0xfcef 0xf95b 0xfcf0 0xfe70 0xfffe
0xf829 0xffff 0xf829 0xffff 0xf829 0xfffe 0xf829 0xffff
0xf828 0x05a7 0x07d7 0x0764 0x0472 0x0002 0xfb90 0x05a9
0xf95b 0x0764 0x07d8 0x07ff 0xfe72 0xfcf3 0xfe72 0xfcf3
0x07d8 0xfcf2 0xfb8f 0x0763 0xfb8f 0x0764 0xfb90 0x0764
0xfb8f 0x0763 0xfb90 0xfa5a 0xf829 0xf89c 0xfb8e 0xffff
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GC3021A 3.3V MIXER AND CARRIER REMOVAL CHIP SLWS137A
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# GC3021A diagnostic test B
#
# use the odd parity map, see testA
# control register settings:
write 0 0x0202
write 1 0x8b6e
write 2 0x5fef
write 3 0x0000
write 4 0x00ff
write 5 0x0044
write 6 0xaaaa
write 7 0xeaaa
write 8 0x1fff
write 9 0x1fff
write 10 0x1fff
write 11 0x1fff
write 12 0xff22
write 16 0x0fff
write 17 0x0400
write 18 0x0001
write 19 0x0bff
# perform snapshot
write 12 0xff22
write 12 0xff26
# wait until bit 3 (0x0008) of register 12 goes high
# the snapshot should be:
0xfe5c 0xfcd4 0x0622 0xfa8a 0x018a 0x0352 0xf9c6 0xfaca
0x0170 0xfc4c 0xf9b0 0xfc52 0xfeaa 0x03a6 0x014a 0xfa8e
0xf98e 0xfc4a 0x067c 0xfa94 0x0126 0x0388 0xfe80 0xfc16
0xf97e 0xfa42 0xf978 0xfa96 0xf94e 0xfc96 0xf96e 0xfbd4
0x00d8 0x043c 0x069c 0x0450 0xff42 0xfaa0 0x00b0 0x0560
0xfdee 0xf9c8 0xf900 0x0646 0x06b8 0x055c 0x0718 0xfaa4
0xf8de 0xfce2 0x0260 0xfaa4 0xf8c8 0xf96e 0x004a 0x0558
0x0750 0xf94e 0x02a4 0x02fa 0x0766 0x02f2 0x0016 0x0554
0xf800 0xfd72 0xf800 0xf800 0xfe2a 0xf800 0xf97a 0xfbba
0xfe40 0xf800 0xf960 0xf800 0xf800 0xfd5e 0xfe62 0xfb9a
0xf938 0xfd6a 0xf800 0xf800 0xfe82 0xfd9a 0xfe78 0xfd64
0xf800 0xfb76 0xf800 0xf800 0xf8ee 0xf800 0xf800 0xfd62
0xfec4 0xf800 0xf9dc 0xf800 0xf800 0xf800 0xfee6 0xfc6c
0xfeaa 0xfb38 0xf892 0xf800 0xfa2c 0xfca0 0xf800 0xf800
0xf86e 0xf800 0xf800 0xf800 0xf852 0xfb0c 0xff40 0xfcf4
0xf800 0xfafe 0xf800 0xfebc 0xf800 0xfecc 0xff6c 0xfd38
0x07fb 0xfaba 0xff78 0x0603 0xf805 0x0544 0x0088 0xfd70
0xf805 0x0794 0x0088 0x0793 0x07fb 0xf86c 0xf805 0xfd71
0x0089 0xfabc 0xff7a 0x0605 0xf805 0xf86d 0xf8d5 0xfabd
0x038b 0xfd70 0x038b 0x0603 0x0086 0x0793 0x0389 0xfaba
0xf805 0x0546 0xfc77 0x0543 0x07fb 0x0605 0xf805 0xf9fb
0xf8d5 0xfd71 0x0088 0x028f 0xfc77 0xf9fb 0xff7a 0x0605
0x0086 0x0793 0x072b 0x0603 0x0088 0xfd70 0xf805 0xf9fb
0xff7a 0xfd70 0x072b 0xf86d 0xff77 0xf86d 0xf805 0xf9fb
0xff78 0x0603 0xf805 0x0546 0x0088 0xf9fb 0x07fb 0x0793
0x0089 0x028f 0x07fb 0x0290 0xff78 0xfd71 0x0088 0x0794
0x07fb 0x0605 0xf805 0x0544 0x0086 0xfd70 0x0389 0x0606
0x072b 0x0793 0x072b 0x0546 0x07fb 0x0290 0x072b 0x0603
0x0086 0xf9fd 0xf8d5 0xf9fa 0xff7a 0x0544 0x0089 0xfabc
0x038b 0x0794 0x07fb 0xf86c 0xf8d5 0xfabc 0xf805 0x0544
0x07fb 0x0290 0xfc77 0x0546 0x07fb 0x0793 0x0089 0xfabc
0xf805 0x0793 0xfc75 0xfd70 0xf805 0xfd70 0x0088 0xfabc

LT5546EUF#PBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Modulator / Demodulator 17MHz Demodulator w. VGA
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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