Rohde & Schwarz ZNB20, User Manual

Page: 1072 / 1332

Command Reference
R&S
®
ZNB/ZNBT
1057 User Manual 1173.9163.02 ─ 38
Parameters:
<Mode> LNOise | LDIStortion | AUTO
AUTO
–
automatic/adaptive gain control (AGC) according to the
RF input level.
LNOise
–
fixed, large IF gain, for low input levels.
LDIStortion
–
fixed, small IF gain, for high input levels.
Parameters for setting and query:
<ReceiverName> String parameter defining the wave(s) followed by the drive port;
see examples below and
Table 7-4 .
Example: *RST; :SENSe:POWer:GAINcontrol:GLOBal MANual
Activate independent AGC settings for each drive port.
SENSe:POWer:GAINcontrol 'B2D1', LNO
Set the AGC for the received wave b
2
(port 2) to "Low Noise".
The setting applies while port 1 is the drive port.
SENSe:POWer:GAINcontrol 'A2B2B3D2', LNO
Set the AGC for the waves a
2
, b
2
, and b
3
to "Low Noise". The
setting applies while port 2 is the drive port.
SENSe:POWer:GAINcontrol? 'B1D2'
Query the AGC setting for the wave b
1
while port 2 is the drive
port. The response is
1, LDIS
(default setting).
Manual operation: See "Drive-port specific settings" on page 376
[SENSe<Ch>:]POWer:GAINcontrol:ALL <Mode>
Applies the same manual AGC <Mode> to all a and b wave receivers.
Note:
●
Without the Extended Power Range option only the gain of the measurement
receivers (the b waves) can be statically set (to LNOise or LDIStortion); the refer-
ence receiver always uses automatic gain control (AUTO). With the option availa-
ble, also the gain of the reference receivers (the a waves) can be set statically.
●
If you also want to distinguish between different sweep segments, use
[SENSe<Ch>:]SEGMent<Seg>:POWer:GAINcontrol:ALL
instead.
Suffix:
<Ch>
.
Channel number
Setting parameters:
<Mode> LNOise | LDIStortion | AUTO
AUTO – automatic/adaptive gain control (AGC) according to the
RF input level
LNOise – fixed, large IF gain, for low input levels
LDIStortion – fixed, small IF gain, for high input levels
SCPI Command Reference