HP 8340A Service Manual page 314

MNEMONIC
DESCRIPTION TYPE LEVELS
RGND REFERENCE GROUND
GROUND ov STAR GND POINT
RPNLSWP REAR PANEL SWEEP OUTPUT ANALOG 10V/SWEEP
XA57P1·44
RPNLSWP RTN
REAR PANEL SWEEP GROUND RETURN GROUND ov XA57P1-100
RSTAT READ STATUS l/D STROBE (15, R3:) DIGITAL TTL (LOW TRUE)
XA27P1·45
SIOA 1/0 STROBE· (FIRST HALF ADDRESSES) DIGITAL TTL (LOW TRUE) XA60P1·15
SIOB 1/0 STROBE (SECOND HALF ADDRESSES)
DIGITAL TTL (LOW TRUE) XA60P1·16
SR FBK YO SENSE RESISTOR FEEDBACK -SV TO -17V
ANALOG XA55P1 ·12, 27
SR PWR YO SENSE RESISTOR POWER ANALOG 5V TO 17V XA55P1·13. 28
SRO BIAS
STEP RECOVERY DIODE BIAS ANALOG 10V/2K TO +sv XA24P1·25
SRO BIAS CONT STEP RECOVERY DIODE BIAS CONTROL
DIGITAL 0 TO -5 LEVELED XA26P1·18
SRQ IEEE 488 SERVICE REQUEST (SRQ) DIGITAL
Tfl A62J7·19
STAT10
STATUS WORD INPUT BIT 10 DIGITAL TTL (LOW TRUE) XA23P1-22
SW1 PLL1 15-30 MHZ ON/OFF CONTROL
DIGITAL Tfl XA42P1 -32
SW2 PLL1 .15 TO .3 MHZ/3-6 MHZ CONTROL DIGITAL
Tfl XA42P1·14
SYTM COIL+ POSITIVE INPUT TO SYTM COIL ANALOG -40V TO -25V
XA28P1 -42
SYTM COIL -
NEGATIVE INPUT TO SYTEM COIL ANALOG -40V A62J18·12
SYTM GND SYTM GROUND
GROUND ov A62J18·13, 14, 15
SYTMDB SYTM DRIVE TRANSISTOR BASE ANALOG -22 TO --39
XA28P1 ·19
SYTMDC
SYTM DRIVE TRANSISTOR COLLECTOR ANALOG .a TO -av XA28P1-20
SYTMHTR REGULATOR HEATER DRIVE TO SYTM
ANALOG o TO +1ov XA24P1-19
SYTMRES SYTM CURRENT SENSE FEED BACK ANALOG .9V LOW BND CW
XA28P1-44
SYTMTHRM
TEMP FEED BACK THERMISTQR IN SYTM ANALOG APPROX. 5V A62J18-9
TCREF ALC TEMP COMPENSATED REFERENCE
ANALOG -.2V/dB OV-OdBM XA25P1-35
THERM1 LOW BAND DETECTOR THERMISTOR ANALOG -1v TO -av
A62J34·3
THERM2
LOW BAND DETECTOR THERMISTOR ANALOG -1ov A62J34-1
TYO KP TRIGGER VO KICK PULSE
DIGITAL TTL (LOW TRUE) XA59P1-100
VCOMP YO DELAY COMPENSATION VOLTAGE
ANALOG -26 MHZ/VOLT XA54P1-27
VSWP YO SWEEP RAMP ANALOG OV TO 10V/SWEEP
XA58P1-97
WBAND BAND INFO l/O STROBE (10, R2:) DIGITAL TTL (LOW TRUE)
XA27P1-43
WCDAC
DELAY COMPENSATION DAC DATA STROBE (5, R3:) DIGITAL TTL (LOW TRUE) XA59P1·30
WLEVEL ALC REFERENCE DAC DATA STROBE (10, Al:)
DIGITAL TTL (LOW TRUE) XA27P1-12
WMOD MODULATION DATA STROBE (10, RO:) DIGITAL TTL (LOW TRUE)
XA27P1·59
WPOAC
PRE-TUNE DAC DATA STROBE (3, R2:) DIGITAL TTL XA59P1-68
WRDAC RESET DAC DATA STROBE (1, R2:)
DIGITAL TTL LOW TRUE XA59P1·29
WSPAT SWEEP ATTENUATOR DATA STROBE (1. RO:)
DIGITAL TTL (LOW TRUE) XA59P1-84
WSPTM SWEEP TIME DAC DATA STROBE (1, R1:) DIGITAL TTL (LOW TRUE)
XA59P1·28
WYO KW
YO KICK PULSE WIDTH DATA STROBE (5, R1:) DIGITAL TTL (LOW TRUE) XA59P1-99
WYTMCTL YTM CONTROL SIGNALS STROBE [11, R1:)
DIGITAL TTL (LOW TRUE) XA27P1·14
WYTMSLP YTM DRIVE SLOPE OAC DATA STROBE (11, R1 :) DIGITAL TTL (LOW TRUE)
XA27P1-44
W11R2 EXTRA 1/0 STROBE (11. R2:)
DIGITAL TTL (LOW TRUE) XA27P1-15
YO COIL+ POSITIVE INPUT TO YO COIL
ANALOG 40V TO 20V XA55P1-15, 30
YO COIL - NEGATIVE INPUT TO YO COIL POWER SUPPLY
A62J2-8, 13
YO TUNE
LOW FREQ PHASE LOCK TO YO DRIVER ANALOG ov ±av XA55P1·24
YOXISTB YO DRIVE TRANSISTOR BASE
ANALOG 30V TO 39V XA55P1-29
Z-AXIS BLANK 2-AXIS BLANKING/MARKER
DIGITAL XA57P1-97
1.4V/GHZ 1.4V PER GHZ REFERENCE
ANALOG 1.4V/GHZ XA28P1-7
5 MHZ CLI< 5 MHZ CLOCK TO HP(IB CHIP DIGITAL
Tfl XA60P1-34
20/30 SWP
20(30 MHZ REFERENCE OSCILLATOR SWEEP ANALOG OV TO +10V XA58P1-41
500 KHZ REF PLL2 500 KHZ REFERENCE
DIGITAL Tfl XA42P1-9
8410 TRIG SYNCRONIZING TRIGGER TO 8410B INTERFACE DIGITAL
Tfl XA57P1-62
REF
M/N 21l/30 LOOP
LOOP
SOURCE
- - - - - - - -
� 0:: -
IL IL IL IL &i IL IL 11.
.. .. "' "'
Ul I'- Ul C\J
� � � � � � � � �
20
23
22
1
20 9
SHEEP GENERATOR
CONTROLLER RF SECTION
Y/O LOOP
- - - - - - - - - - ., - - -
"'
- - IL IL 0::
11. IL IL IL IL IL IL IL IL IL IL
.. "' "' "' "' .. "'
I'- C\J tD I'-
��
� � � � � � � � � � � � �
7, 25 45, 46, 101 36 12. 34 11, 34 18, 28
10, 11 42,43,98
25, 26 49, 60
'
,,4
100
23
15 15 15 15 42
16 16 16
16
12, 27
13 28
25
13 18
9 9
22 4
35
19
2
12
4
26
18 30 100
9
26
NOTE
7
28 30
12
33
36 68
84 84
28 28
6
14
44
15
15, 30
24
29
6
34
41
'2
Scans by HB9HCA and HB9FSX
POWER SLJPPLI ES
MISCELLANEOUS Tl
A62 MOTHERBOARD
- - - fJIRE
A62 MOTHERBOARD COAX CONNECTORS
0:: 0:: 0:: IL IL IL J4-J6 JB-J17,J21-J28
CONNECTORS COLORS
"' "' Lil C\J "'
tD
� � �
� � �
A62J11 - SMC SHIELD AND
21, 43 A62J29 PIN 1; A62J32 PIN 1
GUARD TRACES AROUND PRETUNE.
VSWP, YO TUNE, AND SYTMRES
A62J27 - SMC SHIELD AND
GROUND TRACES NEAR 20/30 SWP
AND VSINP
A62J4, J5, J6, J18 - SMC SHIELD AND
STANDOFF FOR LUG NEAR A62J29
A62J8 - SMC CENTER
A62J8 - SMC SHIELD AND
GUARD TRACE AROUND RPNLSWP
10
A62J1 PIN 49
A62J1 PIN 47
A62J29 PIN 2
A62J29 PIN 3
A62J1B PIN 2
A62J7 PIN 19
P
A62J18 IN 4: A62J32 PIN 3
42
5, 27 A62J18 PIN 12
A62J18 PINS 13 THRU 15; A62J32 PIN 2
A62J32 PIN 2
19
20 A62J32 PIN 4
A62J18 PIN 8
A62J32 PIN 5
44
A62J18 PIN 9
A62J34 PIN 3
A62J34 PIN 1
A62J27 - SMC CENTER
29
8
30
A62J2 PINS 6, 15; A62J29 PIN 5
A62J2 PINS 8, 13
A62J6 - SMC CENTER
A62J29 PIN 4
A62J31 PINS 2, 16
7
A62J31 PIN 7
.
'
Refer to Table 8E-1, Motherboard W1nng List (7 of7) for NOTES
Table 8E-J, Motherhoard Wiring List (5 of 7)
A62 MOTHERBOARD GROUNDS AND
MNEMONICS
COMPONENTS GROUND PLANES
RGND
RPNLSWP
RPNLSWP RTN
RSTAT
SIOA
SIOB
SR FBK
SR PWR
SRO BIAS
SRO BIAS CONT
SRO
STAT10
SW1
SW2
SYTM COIL +
SYTM COIL-
SYTM GNO
SYTMDB
SYTMDC
SYTMHTR
SYTMRES
SYTMTHRM
TC REF
THERM1
THERM2
TYO KP
VCOMP
VSWP
WBAND
WCDAC
WLEVEL
WMOD
WPDAC
WRDAC
WSPAT
WSPTM
WYOKW
WYTMCTL
SYTMSLP
W11R2
YO COIL+
YO COIL-
YO TUNE
YOXISTB
Z-AXIS BLANK
1.4V/GHZ
5 MHZ CLK
20/30 SWP
500 KHZ REF
8410 TRIG
8 409/8 410
" "