Ametek 7280 Instruction Manual page 207

REFMODE [n] Reference mode selector
n Mode
0 Single Reference / Virtual Reference mode
1 Dual Harmonic mode
2 Dual Reference mode
NOTE: When in either of the dual reference modes the command set changes to
accommodate the additional controls. These changes are detailed in section 6.4.14
REFN [n] Reference harmonic mode control
The value of n sets the reference channel to one of the NF modes, or restores it to the
default 1F mode. The value of n is in the range 1 to 32.
REFP[.] [n] Reference phase control
In fixed point mode n sets the phase in millidegrees in the range ±360000.
In floating point mode n sets the phase in degrees.
REMOTE [n] Remote only (front panel lock-out) control
Allowed values of n are 0 and 1. When n is equal to 1, the lock-in amplifier enters
remote only mode in which the front panel control functions are inoperative and the
instrument can only be controlled with the RS232 or the GPIB interfaces. When n is
equal to 0, the front panel controls function normally.
RS [n [n ]] Set/read RS232 interface parameters
1 2
n Baud rate (bits per second)
1
0 75
1 110
2 134.5
3 150
4 300
5 600
6 1200
7 1800
8 2000
9 2400
n Baud rate (bits per second)
1
10 4800
11 9600
12 19200
The lowest five bits in n
following table:
bit number bit negated
0 data + parity = 8 bits
1 no parity bit
2 even parity
3 echo disabled
4 prompt disabled
Appendix F, ALPHABETICAL LISTING OF COMMANDS
control the other RS232 parameters according to the
2
bit asserted
data + parity = 9 bits
1 parity bit
odd parity
echo enabled
prompt enabled
F-15