R&S ESU Series, Руководство по эксплуатации, Страница: 278 / 855

Operating Manual 1302.6163.12 - 03 4.247
R&S ESU Instrument Functions
Basic Settings
NAME The NAME softkey enables the entry of characteristics in the table heading.
Name - Enter name
A maximum of 8 characters is permitted for each name. All names must be compat-
ible with the MS DOS conventions for file names. The instrument stores all limit lines
with the
.LIM extension.
Remote command:
CALC:LIM3:NAME "GSM1"
Domain - Select time or frequency domain
The default setting is frequency.
Remote command:
CALC:LIM3:CONT:DOM FREQ
X-Axis - Select interpolation
Linear or logarithmic interpolation can be carried out between the frequency refer-
ence points of the table. The ENTER key toggles between LIN and LOG selection.
Remote command:
CALC:LIM3:CONT:SPAC LIN
CALC:LIM3:UPP:SPAC LIN
CALC:LIM3:LOW:SPAC LIN
Scaling - selection of absolute or relative scaling
The limit line can either be scaled in absolute (frequency or time) or relative units. In
receiver mode, only absolute scaling is used. Any of the unit keys may be used to
toggle between
ABSOLUTE and RELATIVE , the cursor must be positioned in the X-
Scaling or the Y-Scaling line.
The RELATIVE scaling is always suitable, if masks for bursts are to be defined in the
time domain, or if masks for modulated signals are required in the frequency
domain.
A change in domain (frequency/time) is only permitted when the data point table is
empty.
X-Scaling ABSOLUTE The frequencies or times are interpreted as absolute
physical units.
X-Scaling RELATIVE In the data point table, the frequencies are referred to the
currently set center frequency. In time domain mode, the
left boundary of the diagram constitutes the reference.
Y-Scaling ABSOLUTE The limit values refer to absolute levels or voltages.
Y-Scaling RELATIVE The limit values refer to the reference level (Ref Level) or,
in case a reference line is set, to the reference line.
Limit values with the unit dB are always relative values.