Specifications

These specifications for the E1538A reflect its performance while installed on your VXI module.

General Specifications

Output Characteristics

Characteristic

Pull-Up Off

Pull-Up On (10K to Vcc)

 

 

 

 

 

current source (logic 1)

0

.38mA @ 1.2V

 

current sink (logic 0)

100 mA

100 mA

 

Voltage (logic 1)

0

5V (no load)

 

Voltage (logic 0)

0.5 Max sinking 100mA

0.5 Max sinking 100mA

 

 

0.1 Max sinking 20mA

0.1 Max sinking 20mA

 

 

 

 

Input Characteristics

Characteristic

Pull-Up Off

Pull-Up On (10K to Vcc)

 

 

 

 

(VRS OFF for Chs0&1)

Equivalent circuit

120K conn. to 0 Volts

9.2KΩ conn. to 4.6 Volts

 

 

 

 

Maximum input low

programmable from

programmable from

 

Minimum input high

-46 to 46 Volts (±0.5V)

-46 to 46 Volts (±0.5V)

 

 

 

 

 

 

 

Input Isolation

No Isolation Provided

Cross-Talk Between Channels

A large signal on one channel has an effect on the accuracy of frequency measured on other channels as follows:

Sine-wave interfering signal up to 70Vpp

No degradation of specification

 

 

Square-wave Interfering signal <63Vpp

No degradation of specification

 

 

Square-wave Interfering signal >63Vpp to

Minimum input amplitude changes from 15mV

70Vpp

to 18mV for frequency range of 1Hz to 10Khz

 

(see Input Signal Characteristics spec.)

 

 

Maximum voltage applied to any

-48 Volts to 48 Volts

input terminal

 

Maximum voltage applied to any output terminal

0 - 48 Volts (outputs are diode clamped at -0.3V)

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 77

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VXI VT1538A user manual General Specifications