Rohde & Schwarz CMU-K20, Operating Manual

Page: 159 / 646

CMU-K20/K21/K22/K23/K24 Non Signalling: Connection Control
1115.6088.12 4.81 E-11
RF
Output
The RF Output softkey defines which of the three connectors RF 1, RF 2 and RF 3
OUT is to be used as RF output connector. A symbol indicates the selected RF
output.
Note: It is possible to combine any pair of input and output connectors. The
bidirectional connectors RF 1 and RF 2 can be selected as RF inputs
and outputs at the same time.
The LEDs on the front panel are only „on“ (lit) if the output level is
switched on.
Remote control
OUTPut[:STATe] RF1 | RF2 | RF3
Ext. Att.
Output
The softkey Ext. Att. Output defines an external attenuation (or gain, if the value is
negative) at the selected RF output. Input of an external attenuation is suitable if,
for example, if attenuation (such as a cable) is included in the test setup path,
which is to be corrected by an increased signal level.
If an external attenuation is reported to the instrument, the output signal level is
referred to the input of the DUT, the generator level is therefore shifted with respect
to the actual level at the output connector of the CMU. The default value for the
generator power and the level ranges for the RF outputs are also shifted provided
that the generator can output the required power, compensating for the external
attenuation or gain. Otherwise it is adapted to the level closest to the shifted default
value.
Attenuator
x dB
(P
nom
+ x) dBm
P
nom
dBm 0
1 2 3
4 5 6
7 8 9
. -
ON / OFF ENTER
11 00.00 08.02
VARIATION DATA
FUNCTION SYSTEM
CONTROL
DATA
CTRL
MENU
SELECT
HELP SETUP
mark symb
E F
B M/µ
µV
W
C
dBµV
k/m
G/n
A
mV
D 1
dB
dBm
UNIT...
EXP/CMP CONT/HALT
RF4 IN
UNIVERSAL RADIO COMMUNICATION TESTER CMU 200
.
ESCAPE
*
abc def ghi
jkl mno pqr
stu vwx yz
_ µ
AF IN AF OUT
VOL
DEL
AUTO
INFO RESET
PRINT
* #
Ω
AUX 1 AUX 2
SPEECH
AUX 3
DATA 2
13 dBmMAX 2 W MAX 50 W MAX 13 dBmMAX
RF 3 OUT RF 2 RF 1
DATA 1
INS
CLR
CMU
RF level: P
nom
dBm
Ext. Att. Output: x dB
x
2
DEF 3
GHI 1
ABC
5 6 4
8
ÜVW 7
STU
.
-
0
9
XYZ
S C RCL M
Remote control
[
SENSe:]CORRection:LOSS:OUTPut<nr>[:MAGNitude]
SOURce:CORRection:LOSS:OUTPut<nr>[:MAGNitude]
RF
Input
The RF Input softkey determines which of the three connectors RF 1, RF 2 and
RF 4 IN is to be used as RF input connector. If a connector is selected as RF input,
a symbol
will appear in the respective field. It is possible to combine any pair of
input and output connectors.
Remote control
INPut[:STATe] RF1 | RF2 | RF4
Ext. Att.
Input
The softkey Ext. Att. Input enters the value of the external attenuation (or gain) at
the selected RF input. Input of an external attenuation is required if, for example,
external attenuator pads are used for protection of the sensitive RF inputs of the
CMU or if a path attenuation is included in the test setup.
If an external input attenuation is reported to the instrument all levels measured are
referenced to the output of the DUT and therefore shifted with respect to the actual
level at the input connectors of the CMU. The level ranges for the input connectors
are shifted as well.
深圳德标仪器
135-1095-0799