Hardware Interfaces
R&S
®
SMU200A
837Operating Manual 1007.9845.32 ─ 15
A Hardware Interfaces
This section describes the pin assignment of the monitor connector.
The remote control interfaces are described in chapter 6, "Remote Control Basics",
on page 449.
The AUX IO interface is described with the associated configuration dialog in chap-
ter 5.2.3.12, "User Marker / AUX I/O Settings", on page 140.
All other interfaces are described in chapter 2.1, "Front Panel Tour", on page 19 and
chapter 2.2, "Rear Panel Tour", on page 27.
For specifications refer to the data sheet.
A.1 AUX I/O Connector
For an overview of the signals that can be applied at the USER connector, see
table 5-1.
Table 1-1: Pin assignment of the AUX I/O Connector connector
Pin Signal Description
1 .. 25
Ground ⊥
Ground
26 LEV ATT Signal input/output for controlling the level attenuation.
For two-path instruments, the signal for Path B can be applied to one of the
USER interfaces.
With external envelope curve control ("Custom Digital Modulation" only), the
pin is the input for the control signal LEV_ATT.
With internal envelope curve control, the control signal LEV_ATT is output
for Path A.
27 CW MODE Signal input for controlling the switchover between the modulated and
unmodulated RF signal with activated external modulation/CW switching in
the "Custom Digital Modulation" menu.
For two-path instruments, the CW control signal affects Path A and/or Path
B.
Signal output for the CW control signal with internal source selected. This
signal marks the CW mode in which digital modulation is deactivated and the
RF signal is output in unmodulated form. In the case of digital standards with
selectable modulation mode, the signal indicates the active modulation mode
(GSM: (G)MSK = high, 8PSK EDGE = low).
28 INST TRIG B Input for external triggering of the analog modulations, sweeps and List mode.
HOP input for controlling the frequency hopping mode with external source
in List mode (Path B).
The instrument trigger input for Path A is input via the DIGITAL I/O interface.
29 .. 38 PARDATA0 ..
PARDATA9
Parallel data input/output 0...D with 10-bit word width for digital modulation.
If the data source "External Parallel" is selected, these pins are the data
inputs.
If a different data source is selected, the data is output here ("Custom Digital
Modulation", Path A).
AUX I/O Connector
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