Operating Instructions
CMU-Z6
1150.0199.12
4
E-3
Performing a Modulation Correction
A modulation correction involves three steps:
1.
Connect CMU-Z6 to the CMU200.
REF IN
RF OUT
DC Supply
Rohde&Schwarz
CMU-Z6 1150.0001.02
0 1 A
1 0 B
1 1 C
MODE SETTING
ON
0
1
2
3
4
5
6
7
8
9
.
-
ON / OFF
ENTER
1100 .0008 .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
*
#
Ω
Ω
Ω
Ω
AUX 1
AUX 2
SPEECH
AUX 3
DATA 2
13 dBmMAX
2 W MAX
50 WMAX
13 dBmMAX
RF 3 OUT
RF 2
RF 1
DATA 1
INS
CLR
CMU200
AUX
Use the Sub-D extension cable delivered with the device to supply CMU-Z6 with the +5 V DC
power from the AUX connector at the rear panel of the CMU.
Use the two N to BNC cables to provide CMU-Z6 with a 110.8 MHz reference frequency from
RF3 OUT and to feed the generated test signal back to RF2
*)
.
*)
Important Note:
The assignment of RF connectors depends on the firmware version. Some firmware versions
require RF4 IN to be used as an input connector. Please follow the directions given in the
Maintenance
menu (see p. 5).
2.
Press the MODE SETTING key at the CMU-Z6 to select Mode B.
In mode B the left LED lights, while the right LED is off.
3.
Initiate the modulation correction from the CMU200.
Ensure that the CMU has been warmed up for at least 30 minutes before the modulation
correction is started.
Open
the
Menu Select
menu of the CMU and select the
Maintenance
menu in the
Base
system.
Press
the
Select
softkey and use the rollkey to select
Correction Filter Calibration
.
Press
the
Test
softkey and the
ON/OFF
key to start the modulation correction.