© 2020 Virginia Diodes, Inc.
—All Rights Reserved
7 October 2020
The re
sponse returned from the query “VC” has the following format:
Byte 1 is
“V”
Byte 2 is “C”
Byte 3 is the decimal portion of the firmware code revision
Byte 4 is the integer portion of the firmware code revision
Byte 5 is the decimal portion of the secondary firmware code revision
Byte 6 is the integer portion of the secondary firmware code revision
Example:
In firmware code Rev. 1.2 and secondary firmware code Rev. 3.5, the following string would be received: VC2153. No
response from the host is expected after receipt of this message.
Detailed Command Description
Set Commands
SZ
– will set the zero for the current range. This is the same as pressing the front panel Zero Button. Bytes 4-7 must be sent but
the receiver ignores. The value will be stored in the serial EEPROM.
SC
– will set the calibration for the current range. It is presumed that when this command is sent the calibration heater is set at
exactly half scale for the range, and has had enough time to settle. Bytes 4-7 must be sent but the receiver ignores. The value will
be stored in the serial EEPROM.
R1
– if the front panel rotary switch is set to “Remote,” this will change the range to 200 µW. Bytes 4-7 must be sent but the
receiver ignores.
R2
– if the front panel rotary switch is set to “Remote,” this will change the range to 2 mW. Bytes 4-7 must be sent but the receiver
ignores.
R3
– if the front panel rotary switch is set to “Remote,” this will change the range to 20 mW. Bytes 4-7 must be sent but the
receiver ignores.
R4
– if the front panel rotary switch is set to “Remote,” this will change the range to 200mW. Bytes 4-7 must be sent but the
receiver ignores.
R5
– if the front panel rotary switch is set to “Remote,” this will change the range to 200 µW auto. Byte 4 turns on Range Hold with
a value of 1 and turns off range hold with a value of 0. Bytes 5-7 must be sent but the receiver ignores.
R6
– if the front panel rotary switch is set to “Remote,” this will change the range to 2 mW auto. Byte 4 turns on Range Hold with a
value of 1 and turns off range hold with a value of 0. Bytes 5-7 must be sent but the receiver ignores.
R7
– if the front panel rotary switch is set to “Remote,” this will change the range to ‘20mW auto.’ Byte 4 turns on Range Hold with
a value of 1 and turns off range hold with a value of 0. Bytes 5-7 must be sent but the receiver ignores.
R8
– if the front panel rotary switch is set to “Remote,” this will change the range to ‘200mW auto.’ Byte 4 turns on Range Hold
with a value of 1 and turns off range hold with a value of 0. Bytes 5-7 must be sent but the receiver ignores.
C0
– will set the calibration heater to “OFF” if the back panel Internal Calibration Switch is not set to “OFF.” Bytes 4-7 must be
sent but the receiver ignores.
Response Return Format and Command Descriptions