Download T940/T964 User Manual - Astronics Test Systems

Model T940 User Manual
Publication No. 980938 Rev. K
ADC_IN
Table I-6: ADC_IN Characteristics
Description
Characteristics
ADC_IN
-10 V to +20 V, ±10 mV ±0.6%
Input impedance >1 MΩ
PROBE SUPPORT
Table I-7: Probe Support
Description
Characteristics
PROBE COMP (AUX4 A)
LVTTL output used to control compensation
mode.
PROBE MODE
PBUT
BCLK
LVTTL dedicated external probe module support.
PROBE_IN (AUX1 A)
See Pin Electronic AUX Channels entry above or
External Probe Module entry below
See Pin Electronic AUX Channels entry above or
External Probe Module entry below
Connects to PROBE_IN for external probe
compensation
LVTTL input used to detect the presence of the
external probe module.
Low current power for external probe support.
Max current 200 mA
PROBE_CAL (AUX2 A)
PROBE_OUT
PROBE_DETECT
+12V
-12V
PROBE MODULE CHARACTERISTICS
Table I-8: Probe Module Characteristics
Description
Characteristics
Probe Tip Characteristics
Input capacitance <20 pF
Input Impedance 10 MΩ ± 1%
CONTACT DETECT
<5 MΩ or >50 pF
Illuminates the green LED on the Probe Handle
when contact is made.
Contact LED will extinguish while a pattern burst is
in progress.
ANALOG PERFORMANCE
UR14 Driver/Receiver Board I-24
Input voltage detectable range: -19 V to +19 V
Note: This input range will be attenuated by the
Probe but amplified by the Probe Module to
present to the D/R board a signal which is ±5 V
max. with a 50 Ω source termination
Astronics Test Systems