Annexes
R&S
®
ZNB/ZNBT
1263
User Manual 1173.9163.02 ─ 38
Pin No.
Signal
Input (I)
or Out-
put (O)
Description
31
/PORT D STA-
TUS
O
Indicates the status of port D:
●
Low: port D is an input port
●
High: port D is an output port
32
/WRITE
STROBE
O
Changes to "Low" when valid data is present at any of the output ports (i.e. when the
output level at any port changes).
33
/PASS FAIL
O
Indicates the status of the global limit check for the last measurement:
●
Low: global limit check failed
●
High: global limit check passed
Other configurations are possible; see
CONTrol:HANDler:PASSfail...
commands.
34
/SWEEP END
O
Indicates the end of the measurement. Changes to "Low" after all sweeps in all chan-
nels have been completed and the measurement data has been processed. Alternative
configurations: see
35
+5 V DC
O
DC power supply for external devices; +5 V ± 250 mV, max. 0.1 A
36
/PASS FAIL
STROBE
O
Changes to "Low" when limit check results are present on /PASS FAIL (pin no. 33).
All digital input signals must be TTL compatible with an allowed input voltage range
between –0.5 V and +5.5 V. The circuit diagram of the input path is shown below.
1 k
100
10 k
10 pF
From
Universal
Interface
+5 V
+5 V
Figure 10-6: Circuit diagram of the input path
Digital output signals are low-voltage TTL compatible with output voltages between 0
V
and +5
V. The circuit diagram of the output path is shown below.
Interfaces and Connectors
