Display Sensitivity Faults - HP 3720A Service Manual

Table 4-4 Range transfer check
3721A Controls
A INPUT DISPLAY
RMS VOLTS GAIN
AVERAGING
1 - 2
.4
-
1
.2
-
.4
.2
- .4
.2 - .4
.2
-
.4
.1
-
.2
.04 - .1
MIN
MIN
MI N
MIN
MIN
int
int
MAX
EXPONENTIAL x 1
EXPONENTIAL x 1
EXPONENTIAL x 1
EXPONENTIAL
x
10
EXPONENTIAL
x
100
EXPONENTIAL x 100
EXPONENTIAL
x
100
EXPONENTIAL
x
100
3720A
DISPLAY SENSlTl V ITY
Reading
1
.o
2.0
2.0
5.0
-
x
10-l
x
10-3
10-4
10-5
x
3720A
DISPLAY
SENSITIVITY
Reading
~ ~~
1
.o
V2 /d iv
2.0
x
lo-'
V2/div
5.0
x
V2/div
5 . 0 ~ V2/div
5.0
x
V2/div
2.0 x V2/div
5.0
x
V2/div
5.0 x V2/div
Table 4-5 Range data logic check
3721A
DISPLAY SENSITIVITY
Reading
1
.o
2.0
2.5
5.0
x l
x
10.l
x
10-3
x
10-4
10-5
x
3721 A
DISPLAY
SENSITIVITY
Reading
1 . 0 ~ 1 V2/CM
2.5
x
lo-'
V2/CM
5.0 x V2/CM
5 . o x 10-3 VVCM
5 . o x 10-4 VVCM
2.0 x 10-4 VVCM
5.0
x
V2/CM
5 . 0 ~ V2/CM
3720A J3/
3721A 518 Pin"
29
33
27
-
31
34
28
26
30
32
*All of these pins should be high (+12V) except those of any displayed characters which should be
as shown in Figure 4-5.
WWW.HPARCHIVE.COM