SectionI

Model34904
Table1-2. Generallnformation(Cont'd.)

SAMPLE HOLD (CONT'DI

Sample/Hold AC Characteristics:

Maximum rate of change of input voltage to maintain tracking:

2.5% of range/pson the 10 V and 10OOV ranges. 5 % of range/prson the 1 V and 10O V ranges.

Maximum dV/dt during digitization: 50 V/t s

Minimum ! 3 dB Bandwidth (external input terminals to Samde/Hold amplifiersl :

Range

r 3 dB FrequencY

1 V

20 kHz

1 0 v

4O kHz

100v

1 5 k H z

1000v

20kHz

Time Response Characteristics :

The time response of Sample/Hold for any input waveform can be approximated by the equation:

dvin vs/n =vin+ Kl _f,r

Similarlv, the input waveform can be reconstructed from measured data by the equataon:

dVs/u

Slope of signal as measured in increments small enough that the waveform between measurement points approaches or achieves linearitV.

K1 = Velocity factor. The typical factor for each range is as follows,

Range

Typical VelocitY Factor

1 V

- 10,rs

1 0 v

-

2,rs

100v

-

3 p s

1000v

+ 7 t t s

RATIO

RangeSelection:

External Reference Range: Manual

lnput Range: Manual.automatic, or remote (optionall

Ratio Display:

1 V Ext. Ref . Range: Read ratio directly

10 V Ext. Ref. Range: Multiply display bv 0.1

Polarity Display {automatic) :

+for +DC/+DC or -DC/-DC_for +DC/-DC or _DC/+DC No polarity disPlaYfor AC/DC

Ratio Measurement CaPabilitY :

Maximum Numerical Display: 120O0Oon any Input range

Maximum lnput Voltage: 10O0Vrms

vin = vs/H - rl

Where:

dvs/H

dt

Maximum Reading RaE:

DC/DC: Same as for dc volt'agemeasurements

AC/DC: Same as for ac voltage measurements

(t 400 V peak) continuous

VS/n = Displayed Sample/Hold measurement. Vin = 39OA input voltage.

dVi.

Slope of any portion of an input wavefori?i.

dt

Input Protection: 250 Vrms

Environmental Requilements:

O:C to 4o:c, ( 95% relativehumiditY

O"C to 5O"C maximum operating temperature range

t-6