Rohde & Schwarz ESRP Series, Руководство пользователя

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Receiver Mode
R&S
®
ESRP
157 User Manual 1175.7445.02 ─ 08
For a description of the softkeys of the submenu, see "Signal Track (span > 0)"
on page 318.
5.3.2 Configuring the Level Display and the RF Input
The settings to define the level display range for the scan and to configure the RF input
are available in the [AMPT] menu.
RF Atten Manual ......................................................................................................... 157
Preamp On/Off ............................................................................................................ 157
10 dB Min .................................................................................................................... 157
Auto Range (On Off) ................................................................................................... 158
Auto Preamp (On Off) ................................................................................................. 158
Unit ..............................................................................................................................158
└ dBx/MHz ....................................................................................................... 158
Grid Range / Grid Min Level ........................................................................................159
Input 50 Ω/75 Ω ..........................................................................................................160
RF Atten Manual
Opens an edit dialog box to enter the attenuation.
The RF attenuation defines the level at the input mixer according to the formula:
level
mixer
= level
input
– RF atten RF preamplifier gain
You can attenuate the signal in 5 dB steps. The range is specified in the data sheet.
Note that receiver mode, an attenuation of 10 dB or less is possible only if you turn 10
dB Min off.
Note: The maximum mixer level allowed is 0 dBm . Mixer levels above this value may
lead to incorrect measurement results, which are indicated by the "OVLD" status dis-
play. The increased mixer level allows for an improved signal, but also increases the
risk of overloading the instrument.
When measuring spurious emissions in spectrum mode, this softkey automatically
opens the "Sweep List" dialog box, see
"Sweep List dialog box" on page 265.
Remote command:
INPut:ATTenuation
on page 637
Preamp On/Off
Switches the preamplifier on and off.
Remote command:
INPut:GAIN:STATe
on page 638
10 dB Min
Determines whether the 10 dB setting of the attenuator may be used in the manual or
automatic setting of the attenuator.
If on, the attenuation level is always at least 10 dB to protect the input mixer and avoid
accidental setting of 0 dB, especially if you measure DUTs with high RFI voltage.
"10dB Min" ON is the default value, i.e. an RF attenuation of at least 10 dB is always
set on the R&S
ESRP to protect the input mixer.
Common Measurement Settings