Annexes
R&S
®
CMW500
268
User Manual 1173.9463.02 ─ 02
8.1.1.4
USB REMOTE
Universal Serial Bus connector of type B (instrument acts as device), used for remote
control of the instrument; see
The USB connector complies with standard USB 2.0; refer to the "Specifications".
USB Connection
The length of passive connecting USB cables should not exceed 1 m. The maximum
current per USB port is 500 mA.
8.1.1.5
USB
Single or double Universal Serial Bus connectors of type A (instrument acts as master),
used to connect e.g a keyboard, mouse or other pointing devices, a printer or an external
storage device (USB stick, CD-ROM drive etc.).
The single USB connectors comply with standard USB 2.0, the double connectors to USB
1.1 connectors; refer to the "Specifications".
USB Connection
The length of passive connecting USB cables should not exceed 1 m. The maximum
current per USB port is 500 mA.
8.1.1.6
DIG IQ and AUX (IQ Board, Option R&S CMW-B510A/B)
An IQ board provides four digital connectors (labeled "DIG IQ ...", e.g. "DIG IQ OUT 4")
plus two BNC connectors (labeled "AUX ...", e.g. "AUX A"). The IQ connectors are used
for input and output of digital IQ data. The bidirectional high-impedance BNC connectors
are used for input of the start source signal and input/output of clock source signal/enable
source signal. They are suited for TTL signals in a level range from 2.5 V to 5 V.
The IQ board is required for certain protocol test use cases. Please refer to the protocol
testing documentation for details.
8.1.1.7
REF IN, REF OUT 1
BNC connectors used as input and output connectors for the external or internal refer-
ence signals; see
The function of the connectors depends on the "Frequency Source" setting in the "Sync"
section of the setup dialog:
●
If the "Internal" reference frequency is active, REF OUT 1 is used as an output con-
nector for the 10 MHz internal reference clock signal of the R&S CMW500.
●
If the "External" reference frequency is active, REF IN is used as an input connector
for an external reference clock signal. The R&S CMW500 is synchronized to the
external reference signal. The external reference signal is also routed to the output
connector REF OUT 1.
Interfaces and Connectors
