Rohde & Schwarz CMU-K20, Operating Manual

Page: 162 / 646

Non Signalling: Connection Control CMU-K20/K21/K22/K23/K24
1115.6088.12 4.84 E-11
REF
OUT 2
The softkey REF OUT 2 configures a network-specific system clock REF OUT 2 to
be fed to the output REF OUT 2 at the rear of the instrument.
The associated field permits to select between two alternatives:
OFF (other network ) The clock frequency of the current function group is not fed
to the output
REF OUT 2 .
With this setting the system clock of another active function
group (e.g. the network GSM1800 while the current
network is GSM900) is still applied to
REF OUT 2 provided
that the output REF OUT 2 is switched on in the other
function group . However, if REF OUT 2 is explicitly
switched over from On to Off the clock signal is definitely
removed.
On (current network) The network-specific system clock of the current function
group is fed to output REF OUT 2. The system clock of any
other function group applied to REF OUT 2 before is
replaced.
Besides the basic clock frequency of 39 MHz one of the following clock frequencies
may be selected:
39.000 MHz, 19.500 MHz, 13.000 MHz, 9.750 MHz, 7.800 MHz, 6.500 MHz, 5.571 MHz,
4.875 MHz, 4.333 MHz, 3.900 MHz, 3.545 MHz, 3.250 MHz, 3.000 MHz, 2.786 MHz,
2.600 MHz, 2.438 MHz, 2.294 MHz,
2.166 MHz, 2.053 MHz, 1.950 MHz, 1.857 MHz,
1.773 MHz, 1.696 MHz, 1.625 MHz, 1.560 MHz, 1.500 MHz, 1.444 MHz, 1.393 MHz,
1.349 MHz, 1.300 MHz, 1.258 MHz, 1.219 MHz
(The values are calculated according to the formula F
out
= 39.000 MHz / n where
n = 1, ..., 32 .)
The clock frequency can be used to synchronize other instruments.
Remote control
SOURce:DM:CLOCk:STATe ON | OFF
SOURce:DM:CLOCk:FREQuency <Frequency>
Trigger (Connection Control – Trigger)
The Trigger tab is part of the second group of tabs in the Connection Control menu. It is accessible
after pressing the 1 / 2 toggle hotkey once. Pressing 1 / 2 again switches back to the first group of tabs
described above.
The Trigger tab defines the trigger condition for the measurement and the input for the external trigger
signal.
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