Global Specialties PB-502 - Manual User Manual

Page 13

PB-502 CHECKOUT
To check out the PB-502 the following equipment is required.

1. A dual-trace oscilloscope, 10MHz bandwidth minimum.
2. 3 ½ Digit Digital Volt Meter.

CAUTION

A jumper must be installed in selector S8from center tie

point to either the TTL or CMOS position before turning on
power. Power must also be removed each time the position
of this jumper is changed.

Procedure
Plug 5-pin DIN connector from wall adapter into J1 on the PB-502. Plug wall-mount
adapter into outlet. Turn PB-502 Power switch to ON: LED Dl will light.

Step I
Using an oscilloscope or a DMM, measure the power supply voltages present on the tie
point connector:

1. +12 should read between +11.4 volts and +12.6 volts.
2. +5 should read between +4.75 volts and +5.25 volts.
3. -12 should read between -11.4 volts and -12.6 volts.
4. Vcc should read between:

a) +11.4 volts and +12.6 volts with the CMOS/TTL switch in the CMOS

position.

b) +4.75 volts and +5.25 volts with the CMOS/TTL switch in the TTL

position.

Step II

Using an oscilloscope, measure the output frequency and amplitude of the clock
out signal.

1. Set Freq switch to 1Hz.

a) Frequency should be between 0.8Hz and 1.2Hz.
b) Amplitude should be the same as Vcc levels, that is, +12volts with the

CMOS/TTL selector jumpered to the CMOS position, and +5 volts with
the CMOS/TTL selector jumpered to the TTL position.

2. Set Freq switch to 1kHz.

a) Frequency should be between 800Hz and 1.2kHz.
b) Amplitude should be +12 volts in CMOS, +5 volts in TTL.

3. Set Freq switch to 100kHz

a) Frequency should be between 80kHz and 120kHz.