magore@watdcsu.waterloo.edu (Mike Gore, Institute Computer Research - ICR) (03/03/89)
2400HZ Crystal phase lock Weather Satellite decoder
Updated by Mike Gore March 1989.
Part 2 of 3
===========
The following are symbols used for the ascii diagram that follows.
Labels:
(round braces)
Traces:
(Corner) +----O (Main signal I/O or control)
|
(Connection) o
Resistor:
100 = 100 ohms
4K7 = 4700 ohms
v10K = 10000 ohms variable
Capacitor:
3n3 = 3.3 nanofarad
Diode: 1N914
-|<- ->|-
(Cathode)(Anode) (Anode)(Cathode)
FET: MPF102
o (Drain)
D
oG (Gate)
S
o (Source)
Inductor:
--44mH--
Crystal: 2,457,600HZ
-Y-
Op Amp: LF353 or TL082
(-IN) o-
OPo (Out)
(+IN) o+
Analog switch: DG201
(Control)
O
(In/Out) oXo (In/Out)
NAND gate: 74LS00
(IN 1) o
NANDo (OUT)
(IN 2) o
XOR gate: 74HC86
(IN 1) o
XORo (OUT)
(IN 2) o
===========================================================================
Analog section:
Power in
(+12)---100---o---------O (+12 to all OP amps)
+|
47uf
|
(GND)---------o----o----O (AGND and DGND) - AGND is to be tied to DGND here
+| |
47uf |
| |
(-12)---100---o---------O (-12 to all OP amps)
|
|
47uf
+|
(+5)---------------o----O (Logic +5)
Passband filter section
+----13K------+
| | +-----13K-----+
(SIG IN) O-3n3-o-3n3-o--o- | | |
| OPo-o--13K-o-13K-o--o- |
| o+ | | OPo-o---+
(AGND) O-+ | | 27K | o+ | |
| 13K | | | | 27K |
| | +----o 10n | | |
| | | | +----o |
| | 47K | | |
| | | | 47K |
| | | | | |
+-----o---------o-------o------------o-------o |
| |
| |
| +--------------------------------------------+
| |
| | +-----13K-----+
| | | | +-----13K-----+
| +-3n3-o-3n3-o--o- | | |
| | OPo-o--13K-o-13K-o--o- |
| | o+ | | OPo-o---+
| | | 27K | o+ | |
| 13K | | | | 27K |
| | +----o 10n | | |
| | | | +----o |
| | 47K | | |
| | | | 47K |
| | | | | |
o---------------o-------o------------o-------o |
| |
| |
| |
| +--------------------------------------------+
| | Absolute value converter
| |
| | +-4K7-o-v10K-o-10K-+
| | | | |
| | +-10K-o-|<-+ | | (IN1)
| | | | | |
| | o-10K-o->|-o o- | O
| | | | | OPo--o--oXo----o
| | | o----|-------o+ |
| | | | | |
| +---10K-o- | | Cliper |
| OPo--|----o- |
| o+ | OPo--1K-o----O (PHASE) |
| | | o+ | |
| 10K 10K | +->|-o->|-O (+5) |
| | | | | |
o-----------o-----o----o---o |
| |
| |
| -------------------------------------------+
| | Switched Integrator
| |
| | +-------+
| | (IN4) (IN3) | |
| | +-o- |
| | O O OPo--o--4K7--O (VID)
| | +-oXo-o-oXo-o--o+
| | | | | +-O (AGND)
| | o-3n3-o | |
| | | | | |
| v10K--10K-o- | n15 |
| | OPo--o | |
| | o+ | |
| | | | |
o---o-------o-----------o--------------+
| |
| 10n VXO section
| |
| o---100---O (+12)
| D
| +--o---o--oG (MPF102)
| | | | S
| | | | o
| 2.4576MHZ Y | | |
| | | n15 |
| | | | |
| +--o 220K | |
| | | | o----o--n47--O (VCLK)
| o | | | |
| (IN2) OX 20p | 44mH n15 +-O (AGND)
| o | | | | |
| | | | | | |
o--------o--o--o---o----o-----o
(+5) O--o-------------------------------+
| | Timing section
(ACLK)O--|--------------+ |
| Mc14020 | 74ls164 |
| ======== | ========= |
| | | | | Clr| 7-o
+-16|Vcc | | | Vcc|14-o
| | | | | |
| |9--o---8|> Qa| 3---------------1o
(VCLK) O--10|> | | Qc| 5-----12o NANDo 3--------O (IN3)
| | | | | XORo11--2o
(LREF) O--14| | +-o-1|A | o---13o
| | | +-2|B | |
| | | | Qh|13---------------4o
| | | | Qf|11------9o NANDo 6-o------O (IN4)
| | | | | | XORo 8--5o |
| | | | | o---10o +----+
| |14---+ | | |
+-11|Clr | | | | | o--9o
+--8|Gnd | | | | Gnd| 7-+ | NANDo 8-O (IN1)
| ======== | | ========= | o-10o
| | | |
(DGND) O-o--------------------------o----+
| | | +-o+ Output for tape ref track in
+-----5o | | OPo-o---------------------------O (OREF)
XORo6---o | +-o- |
+-4o | | | |
| | o----100K-o-100K-o
| | | |
| | +-10n--+
| +----2o
| XORo-------------------------------------O (IN2)
(PHASE) O--------------------1o
|
+-------------------------------+
| PLL for tape ref track out
LM567 |
================= |
(IREF) O----330n----3|In V+ |4------|-------------------o-----O (+5)
| | | |
(DGND) O-o--100n----2| | | |
| | | | |
o--6m8 ----1|Out Filt OUT |8------|---o-LED+o---330---+
| | | |
o----------7|Gnd | | (Ref. locked led)
| | Timing Res |5------o
o--100n-o--6|Timing Cap | |
| ================ |
| |
+--1K---o---v10K------------+
TTL reference set point for DG201
DG201
==========
(-12) O-4|V- V+|13-------o----O (+12)
| | |
(DGND) 5|Gnd Vref|12--100K-+
| |
==========
A/D Section:
ADC0809
===============
+----12|Vref+ CLK |10-----O (ACLK)
| | |
100 | | DB25 Atari printer port
| | | ... set to *input* mode
(+5)-----o--o-11|Vcc D0|17-----O 2
| +- 9|OE D1|14-----O 3
| | D2|15-----O 4
(IN1)-------o--6|Start D3| 8-----O 5
| +-22|Ale D4|18-----O 6
| | D5|19-----O 7
(VID)---------26|IN0 D6|20-----O 8
| | D7|21-----O 9
+ | | |
47uf | |
| | EOC| 7-----O 11
| | |
o----25|A | o--O 18
o----24|B | o--O 19
o----23|C | o--O 20
| | | o--O 21
| | | o--O 22
o----16|Vref- | o--O 23
| | | o--O 24
| | | o--O 25
o----13|GND | |
| | | |
| =============== |
| |
(DGND) O-o-------------------------o
(AGND)
Signals:
SIG IN: 2400HZ Audio signal from receiver or tape deck
OREF: 2400HZ reference signal to tape deck
IREF: 2400HZ reference signal from tape deck
--
End of Part 2 of 2
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