Ametek 7230 Instruction Manual page 98

Chapter 6, COMPUTER OPERATION
IE1 [n]
IE2 [n]
REFN [n]
REFMON [n]
REFP[.] [n]
6-12
n Selection
0 INT (internal)
1 EXT TTL (external front panel REF input)
2 EXT ANALOG (external front panel REF input)
This command is invalid in Dual Reference mode
Reference channel 1 source control, Dual Reference
In Dual Reference mode, the value of n sets the reference channel 1 source according
to the following table:
n Selection
0 INT (internal)
1 EXT TTL (external front panel REF input, except if IE2 = 2, when the reference
should be applied to the rear panel TRIG IN input, and be no greater than
3.0 kHz)
2 EXT ANALOG (external front panel REF input)
This command is only valid in Dual Reference mode.
Reference channel 2 source control, Dual Reference
In Dual Reference mode, the value of n sets the reference channel 2 source according
to the following table:
n Selection
0 INT (internal)
1 EXT TTL (external front panel REF input except if IE1 = 2, when the reference
should be applied to the rear panel TRIG IN input, and be no greater than
3.0 kHz)
2 EXT ANALOG (external front panel REF input)
This command is only valid in Dual Reference mode
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 127.
Reference monitor control
The value of n sets the function of the rear panel TRIG OUT connector according to
the following table:
n Mode
0 Trig Out signal is generated by curve buffer triggering
1 Trig Out signal is a TTL signal at the reference frequency (i.e. it is a Reference
Monitor output)
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.