Command reference
R&S
®
ZNL/ZNLE
642
User Manual 1178.5966.02 ─ 19
Example: The decimal value 40 = 32 + 8 indicates that bits no. 3 and 5 in the status
register (e.g. the QUEStionable status summary bit and the ESB bit in the STB) are
set.
Error queue
Each error state in the instrument leads to an entry in the error queue. The entries of
the error queue are detailed plain text error messages that can be queried via remote
control using
. Each call of
SYSTem:ERRor[:NEXT]?
pro-
vides one entry from the error queue. If no error messages are stored there any more,
the instrument responds with
0, "No error"
.
The error queue should be queried after every SRQ in the controller program as the
entries describe the cause of an error more precisely than the status registers. Espe-
cially in the test phase of a controller program the error queue should be queried regu-
larly since faulty commands from the controller to the instrument are recorded there as
well.
11.4.4.5
Reset values of the status reporting system
The table below indicates the effects of various commands upon the status reporting
system of the R&S
ZNL/ZNLE.
DCL, SDC (Device Clear, Selected Device Clear)
Event
Switching on
supply voltage
Power-On-Status-
Clear
DCL, SDC
(Device
Clear,
Selected
Device Clear)
*RST or
SYS-
Tem:PRE-
Set:ALL
STA-
Tus:PRE-
Set
*CLS
Effect
0
1
Clear STB, ESR
yes
yes
Clear SRE, ESE
yes
Clear PPE
yes
Clear EVENt parts of the reg-
isters
yes
yes
Clear ENABle parts of all
OPERation and QUESTiona-
ble registers,
Fill ENABle parts of all other
registers with "1".
yes
yes
Fill PTRansition parts with "1"
Clear NTRansition parts
yes
yes
Clear error queue
yes
yes
yes
Clear output buffer
yes
yes
yes
1)
1)
1)
Clear command processing
and input buffer
yes
yes
yes
VNA remote control basics
