Model 
Output Frequency 
Specifications 
Other Related Models 
A 
Fixed 400Hz 
Freq. Accuracy: 0.1% of setting
TH Dist: 0.35%

Model A2 is two phase (90^{o}
apart) output.
Model A3 is three phase (120^{o}
apart) output.
Model A534 is builtin with 010V
DC controller.
Model A/SQ is sine/square output switchable. 
B 
Fixed 60Hz 
Freq. Accuracy: 0.1% of setting
TH Dist: 0.35%

Model B2 is two phase (90^{o}
apart) output.
Model B3 is three phase (120^{o}
apart) output.
Model B534 is builtin with 010V
DC controller.
Model B/SQ is sine/square output switchable. 
C 
Fixed 50Hz 
Freq. Accuracy: 0.1% of setting
TH Dist: 0.35%

Model C2 is two phase (90^{o}
apart) output.
Model C3 is three phase (120^{o}
apart) output.
Model C534 is builtin with 010V
DC controller.
Model C/SQ is sine/square output switchable. 
F 
Fixed two fixed frequencies 
Freq. Accuracy: 0.1% of setting
TH Dist: 0.35%
User can specified frequencies

Model F2 is two phase (90^{o}
apart) output.
Model F3 is three phase (120^{o}
apart) output.
Model F534 is builtin with 010V
DC controller.
Model F/SQ is sine/square output switchable 
S 
20Hz to 20KHz adjustable 
Resolution: 0.1 Hz steps
TH Dist: 1%
Freq. Accuracy: 0.01% of setting
41/2 digit frequency display

Model S2 is two phase (90^{o}
apart) output.
Model S3 is three phase (120^{o}
apart) output.
Model S534 is builtin with 010V
DC controller.
Model S/SQ is sine/square output switchable. 
K 
20Hz to 20KHz adjustable 
Resolution: 0.1 Hz steps
TH Dist: 1%
Freq. Accuracy: 0.01% of setting
Thumbwheel Selection: 6 digits.

No two phase or three phase version
available.
Model K534 is builtin with 010V
DC controller.
No square wave output available.

XA1 

For Amplifier Version Units 
It creates continuity with 1sec time delay. 