R&S esu, Quick Start Manual, Page: 47 / 223

Quick Start Guide 1302.6163.62 - 04 1.15
R&S ESU Front and Rear Panel
Rear Panel Connections
In addition, the in5 V and +12 V power supply voltages are provided. The maximum
load current is 100 mA.
The user ports are configured in the SETUP menu ( SETUP key), GENERAL SETUP /
USER PORT sub-menu.
Pin 21 (A7) is also used as ready-to-trigger signal (see also the Operating Manual, chapter 4,
section “User Port”).
Reference Input and Output (REF IN and REF OUT)
The REF IN female connector is used as an input for a 10 MHz reference signal. The required
input level is 0 to 10 dBm. The REF OUT female connector provides the internal 10 MHz
reference signal with a 0 dBm output level for other devices.
The
SETUP menu is used to select between the internal and external references.
If an external reference is used for operation, the external reference signal from REF IN is
looped through to REF OUT.
Pin Signal Range of values
1 to 11 not used
12 ground
13 +5 V supply voltage 5.2 V ± 0.5 V, max. 30 mA
14 to 20 reserved
21 ready-for-trigger output signal HIGH:
≥
1.4 V, LOW:
≤
0.7 V
22 to 23 not used
24 ground
25 +12 V supply voltage +12 V ± 0.5 V, max. 10 mA
Use suitable double shielded cables.
1
13
25
14
+5 V
GND
GND
+12 V
A7
A6
A5
A4
A3
A2
A1
A0