4
The following table summarizes the operation of the unit under various operating conditions.
Setting
Signal
T
R
AC/DC Coupling
2nd Stage
Small Signal on large DC Components
1.4K
AC
X1, X10 As Needed
High Frequency signal, >35 MHz
1.4K
DC
X1, X10 As Needed
Low Level Signal<35 MHz
14K
DC
X1, X10 As Needed
Low Level, High Frequency Signal
1.4K
DC
X10
Operating Considerations
continued
Spectral Response
The approximate relative response curves of the detectors employed is as shown below. Note that
these are representative curves and do not necessarily correspond to the exact response of the par-
ticular detector in use.
The approximate power at the detector surface is given by:
Peak output voltage (no load)
0.8 A/W x T
R
x % Relative response from graph/100
Peak output voltage (no load)
0.55 A/W x T
R
x % Relative response from graph/100
Input power in watts (Si) =
Input power in watts (InGaAs) =
