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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
UR14 Driver/Receiver Board I-23
Description
Characteristics
Voltage Monitoring
V+, V- and Front Panel DUT_GND
Hybrid Connection
Connects F/P pin to any channel (need to disable
drive to the channel)
~40 Ω series impedance, ~3 MHz bandwidth
* This range is limited by the power converter ranges.
1
700 mV at the fastest slew rate.
Programmable AUX I/O Min/Max Levels
The programmable AUX I/O level minimum and maximum values are
determined by the V+ an V- bias voltage levels. The following table lists the
min and max levels based on the V+ and V- level:
Table I-4: Programmable AUX I/O Min/Max Levels Front Panel
Level
Min
Max
Units
DVH
V- + 5
V+ - 3
V
DVL
V- + 4
V+ - 7
V
CVH
V- + 2
V+ - 7
V
CVL
V- + 2
V+ - 7
V
Vcom High (CMH)
V- + 2
V+ - 7
V
Vcom Low (CML)
V- + 2
V+ - 7
V
The following table lists the min and max levels based on the power converter
type 1 or 3 setting:
Table I-5: Programmable AUX I/O Min/Max Levels Power Converter Type 1 or 3
Level
Power Converter Setting
Units
-12 to +12
-15 to +5
-10 to +10
-5 to +7
-5 to +15
0 to +24
-2 to +22
DVH max
12
5
10
7
15
24
22
V
DVH min
-10
-13.5
-8.5
-4
-4
1
-0.5
V
DVL max
8.5
2
8.5
4.5
11.6
21
18.8
V
DVL min
-11.6
-15
-10
-5
-5
0
-2
V
CVH max
9
2.6
9
5
12.2
21.8
19.4
V
CVH min
-12
-15
-10
-5
-5
0
-2
V
CVL max
9
2.6
9
5
12.2
21.8
19.4
V
CVL min
-12
-15
-10
-5
-5
0
-2
V
CMH max
9
2.6
9
5
12.2
21.8
19.4
V
CMH min
-12
-15
-10
-5
-5
0
-2
V
CML max
9
2.6
9
5
12.2
21.8
19.4
V
CML min
-12
-15
-10
-5
-5
0
-2
V