R&S EB200 Manual page 41

EB200 Manual
Configuration of the M-scan-run parameters
The parameters T_DWELL, T_NOSIG and CYCLES can be selected with SEL and then varied with the
spinwheel or entered in the editor and varied.
SQ FROM MEM
T_DWELL
T_NOSIG
The hold time T_NOSIG can well be used to skip non-speaking times in radio communications. In order
to control the dwell time by a signal of an occupied channel, the parameter T_NOSIG is required
additionally. If a hold time is defined for the parameter T_NOSIG, the signal bit is queried during the
normal dwell time T_DWELL in a periodical way. The signal bit corresponds to the signal on pin 6 of the
audio connector X8 at the rear panel of the EB200 and indicates whether the instantaneous signal level
is above the squelch value. If the signal bit disappears, the hold time is activated. After the hold time
has elapsed the scanning will continue with the next frequency. If, however, the signal bit emerges
during the hold time again, the hold time is stopped and the disappearance of the signal is waited for
again. Thus the hold time behaves like a monoflop that can be retriggered and abort the normal dwell
time T_DWELL early. If T_NOSIG is OFF after T_DWELL has elapsed the scanning will proceed with
the next frequency independently from the state of the signal bit.
CYCLES
Note:
The scan may automatically go from the RUN state to the STOP state when the CYCLE-COUNT is
reached.
STATUS
MEM
Note:
The parameters FRQ, MOD, BW, SQ, ATT, ANT and AFC are directly displayed parameters and
cannot be directly edited in the memory location. They can only be modified by exchanging the contents
of the current memory location with the data of the receiver by the RX <->MEM key and then editing
them and exchanging them back again.
4052.2000.02
Squelch status and value from memory location:
dwell time:
further scan signal-controlled after pause:
number of scan cycles:
softkeys ACTIVATE or SUPP (see "Symbols" on page 11)
memory location number (select by spinwheel or enter by MEM key)
1 to 1000 / infinity
3.27
Operation
ON / OFF
0.0 to 10.0 s / infinity
OFF / 0.0 to 10.0 s
E-7