Fluke Wavetek-Datron 395 - Page 223

A.2.16 Signal Summing
Extemal signals may be summed directly to the Model 395's output through the SUM
IN BNC. The scale factor of the Sum Input is dependent upon the selected output
attenuator which is dependent on the combination
of amplitude and offset program. For
a given setup the scale factor will be displayed via front panel orremote query (see table
below). Scale factor accuracy (expressed in units ofVoutIVin) is 5%.
Peak Ampl+ ABS(Offset) Attenuation MAIN OUT/SUM IN Ratio
2.500 to 5.00 V 0 dB 1 VN
1.250 to 2.500 -6 dB 0.5 VN
0.625 to 1.250 -12 dB 0.25 VN
0.313 to 0.625 -18 dB 0.125 VN
0.156 to 0.313 -24 dB 0.0625 VN
0.078 to 0.156 -30 dB 0.03125 VN
0.039 to 0.078 -36 dB 0.015625 VN
0.019 to 0.039 -42 dB 0.0078125 VN
A.2.17 Inputs/Output
Maximum Floating Voltage W.r.t RS423 & IEEE 488
Trigger Input
±42Vpk
A-10 Specifications
Level:
Impedance:
Min width:
Max frequency:
Protection:
Sum Input
Level:
Impedance:
Bandwidth
Protection:
Reference Input
Level:
lmpedance:
Duty cycle:
Frequency:
Protection:
Reference Output
Level:
Impedance:
Frequency:
Protection:
Main Output
Impedance:
Protection:
Off Isolation:
AM Input
Impedance:
Level:
Protection:
Programmable between
±1O V.
2ill.
>20ns.
5 MHz.
Overvoltage to ±25V without damage.
±5 Vp-p maximum.
600f1.
>30 MHz.
Overvoltage to ±lOV without damage.
1 Vp-p min, 10 Vp-p max; 50
Vdc maximum.
5
ill (AC coupled).
40 - 60%.
10MHz±5%.
Overvoltage to ±50V without damage.
TIL level into open circuit; >1.2 Vp-p into 500.
500.
Same as selected reference (internal or external).
Short circuit without damage.
500±1%.
short circuit without damage.
-50 dBc
at 20 MHz loaded into 500.
>2.5 kO.
±2.5V.
overvoltage to ±25V without damage.
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