BWD Electronics - 820 - Oscilloscope
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BWD Electronics 820
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Equipment:
820
Date:
1980
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Information
BWD 820 Portable Oscilloscope provides an accurate
measurement capability from DC to <25MHz with a sensitivity
range from 2mV to 20V/cm and selection of either normal dual
channel or a single channel differential operation.
Time-base and trigger facilities complement the vertical
amplifiers with a 40nSec to 5 Sec/cm sweep range and
triggering from 2Hz to 40MHz.
Operation is virtually automatic with the BWD "all buttons
out" feature for normal dual trace operation. Changeover
from chopped to alternate display and frame to line video
triggering is controlled by the time-base range switch.
Calibration accuracy is maintained within 3% over widely
varying conditions of temperature and supply voltages by
electronically regulated supplies throughout.
High brightness, even with low repetition rate signals is
provided by the 4kV EHT supply for the high definition mesh
PDA CRT.
Identical X-Y sensitivities, phase compensated from DC to
100kHz are incorporated for phase measurements of
amplifiers, filters, etc.
A DC coupled TTL compatible Z modulation input enables the
BWD 820 to be applied to digital measurements and display
video readouts as a DC coupled X-Y-Z monitor.
The regulated supplies and low power consumption, together
with the high stability of the integrated circuit amplifiers
reduces drift or trace movement to a very low level in both
monitoring and measurement applications.
For TV or VTR applications, an active sync separator ensures
stable video displays with polarity selection and automatic
changeover from frame to line.
An additional feature of the TV trigger is as an AM
demodulator to lock modulation waveforms and as a filter
when measuring noisy signals.
The BWD 820 is designed to closely conform to I EC 348
recommendation and has been subjected to a wide range of
environmental conditions to ensure a reliable long life. Its
advanced low power consumption circuitry employs both
analogue and digital I.C.'s and a DC to DC switching
converter power supply.
No ventilation holes are needed, due to the low temperature
rise, thus minimising dust ingress. However* like all
electronic instruments, it is advisable to store it out of
direct sunlight to minimise temperature cycling.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
68
Size:
3.0 MB
Language:
english
Revision:
Issue 9
Manual-ID:
Date:
January 1980
Quality:
Scanned document, all readable.
Upload date:
June 3, 2017
MD5:
ae301bbd-af98-ce8e-2f47-c143f6493960
Downloads:
416