This command controls the non-volatile memory lock feature. When NVLOCK is enabled, the user may not
save any system settings to non-volatile memory. This includes global parameters, presets, macros, labels,
and logic assignments. The lock applies whether the user tries to make the changes via RS-232, front panel,
logic inputs, or any other method. The user will still be able to query all the features of the device, but will
get an error message if an attempt is made to change them. When NVLOCK is disabled, the user has full
access to the system settings.
Usage of this command is similar to other boolean commands (see
Section 6.1) except that when disabling
this feature, the password must be supplied for the command to work. If an incorrect password is supplied,
'ERROR#005' will be generated. The examples below illustrate the correct usage. The examples assume that
the password has been set to 'aspi' (the default). The NVLOCK password can be changed via the
NVPSWD
command.
This command is saved to global non-volatile memory and is not part of a preset. Its value is saved each
time it is changed. It will retain its value after power-down. Since this command writes to non-volatile
memory, there will be a delay before an acknowledgment is returned.
Example Description Status Message
B01NVLOCK1
Lock the non-volatile memory to
prevent users from changing the
settings.
B01NVLOCK1
B01NVLOCK0,yumyum
Attempt to unlock the non-volatile
memory by using an invalid
password.
B01ERROR#005 -- since an invalid password
was given, an error message was generated.
If error messages have been disabled (via the
ERROR command), then no status message
will be generated.
B01NVLOCK0,aspi
Unlock the non-volatile memory by
using the correct password.
B01NVLOCK0
B01NVLOCK?
Query the locked status of the non-
volatile memory.
B01NVLOCKx , where x is 0 or 1 depending
on whether the non-volatile memory is
unlocked or locked, respectively.
8.117. NVPSWD -- Change Non-Volatile Memory Password
This command sets or queries the non-volatile memory password. This password is used in conjunction with
the NVLOCK command. The non-volatile memory must be unlocked ('NVLOCK0') in order to use this
command to set or query the non-volatile memory password. If the non-volatile memory is locked, then this
command will result in 'ERROR#004'. The examples below assume that the non-volatile memory is unlocked.
Example Description Status Message
B01NVPSWDlemur
Set non-volatile memory password to 'lemur'.
B01NVPSWDlemur
B01NVPSWD?
Query the current non-volatile memory password.
B01NVPSWDlemur
8.118. PEQIA -- Set All Parameters for Specified Parametric EQ
Input Stage
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