Test Terminals
5-16
CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
5.4.2
Detector
GN
D
EO
U
T
HI
LO
THR
Vtune
WP
OU
T
Vtune
WP
OU
T
V
tune
WP
OU
T
Vtune
WP
OUT
Vtune
WP
OU
T
Vtune
WP
OU
T
V
tune
WP
OU
T
Vtune
WP
OUT
Vtune
WP
OU
T
Vtune
WP
OU
T
V
tune
WP
OU
T
Vtune
WP
OUT
Vtune
WP
OU
T
Vtune
WP
OU
T
V
tune
WP
OU
T
Vtune
WP
OUT
Vtune
WP
OU
T
Vtune
WP
OU
T
V
tune
WP
OU
T
Vtune
WP
OUT
Vtune
WP
OU
T
Vtune
WP
OU
T
V
tune
WP
OU
T
Vtune
WP
OUT
8
7
16
15
14
13
12
11
10
9
24
23
22
21
20
19
18
17
2
1
6
5
4
3
GN
D
GN
D
+1
3V
+5
V
+15
V
-1
5V
-5V
DRI
V
E
DRI
V
E
SA
MP
L
SA
MP
L
1,2,
3
1,
2,
3
4,5
,6
4,
5,6
Figure 5.9 Location of detector test points
5.4.2.1
PMT Strips
All measurements are referenced to GND, which is represented by any of the mounting screws.
Vtune
is a DC test point that reflects the tune value for the particular PMT.
Range: 0 – 5 V = digital tune value 0 – 1023.
WP
is a DC test point that reflects that the autotune loop on the particular PMT is
operational. At normal operation, the voltage reading should be 2 – 4 V. If the
voltage reading is lower or negative, then the inherent PMT gain is too low. In
that case, either the high voltage is too low or the PMT is defective
OUT
is an oscilloscope test point showing the output from the PMT preamplifier. The
magnitude of scintillation signals from technetium or cobalt should be around
4 – 5 Vpp. Base line should be 0 V
±
30 mV.
Figure 5.10 Typical PMT output
5.4.2.2
POWER Strip
All measurements are referenced to local GND pins on the power strip.
Summary of Contents for CARDIOMD
Page 1: ...CARDIOMD SERVICE MANUAL 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 10: ...Introduction x CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 16: ...Safe Operating Practices 1 6 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 164: ...Detector Calibration Files 5 60 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 328: ...Installation Procedures 9 38 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 348: ...Planned Maintenance Procedures 11 6 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 465: ......