Tektronix 1A5 Instruction Manual page 12

Operating Instructions — Type 1A5
10.00 V
Generators
(A)
IB)
Fig. 2-2. The effect of difference in source impedance upon apparent CMRR.
2-4
Source Impedance
10 kΩ
5 kΩ
Source Impedance
FREQUENCY
B-A = 0.05 V
Apparent DC CMRR = 200:1
(See graph for effect on AC CMRR)
(High impedance sources.)