R&S ESU Series - Operation on a Discrete Frequency - FREQ Key

R&S ESU Instrument Functions
Receiver Mode
4.14 Operating Manual 1302.6163.12 - 03
4.5.1 Operation on a Discrete Frequency – FREQ Key
FREQ
The FREQ key opens the FREQUENCY menu for setting the receive frequency in
manual operation and the frequency axis for scan display.
RECEIVER
FREQUENCY
The RECEIVER FREQUENCY softkey activates the entry field of the receiver fre-
quency.
The tuning frequency has to be set to at least twice the IF bandwidth.
When the tuning frequency is lower than twice the IF bandwidth, the IF bandwidth is
automatically reduced so that this condition is met again.
If the frequency is increased again, the original IF bandwidth is restored (memory
function). The memory is cleared when the IF bandwidth is manually changed.
Range: 20 Hz ≤ f
rec
≤ f
max
This softkey is also available in the RECEIVER / MEAS menu.
Remote command: FREQ:CENT 300 MHz
STEPSIZE
The STEPSIZE softkey opens a submenu for setting the step size of the receive fre-
quency. The step size can be coupled to the set frequency or be manually set to a
fixed value. The softkeys of the submenu are mutually exclusive selection switches.
Only one switch can be activated at any one time.
AUTO COARSE If the AUTO COARSE softkey is activated, the receive frequency is set in coarse
steps. The 4th digit of the selected frequency is varied.
Remote command: --
AUTO FINE If the AUTO FINE softkey is activated, the receive frequency is set in fine steps. The
7th digit of the selected frequency is varied.
Remote command: --
STEPSIZE
MANUAL
The STEPSIZE MANUAL softkey activates the entry window for the input of a fixed
step size.
Remote command: FREQ:CENT:STEP 50 kHz
RECEIVER FREQUENCY
STEPSIZE
! AUTO COARSE
AUTO FINE
STEPSIZE MANUAL
STEPSIZE = FREQ
START
STOP
RUN PRE-SCAN+FINAL
RUN SCAN