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General Information
OPTIONS
900 - 903. Options
900 through
903 are
special
cord
options.
The
connector
configurations
are shown in Section II of this manual.
1-14.
INSTRUMENT
AND
MANUAL
IDEN-
TIFICATION.
1-15.
Instrument
identification
by serial number
is
located
on the rear
panel.
Hewlett-Packard
uses
a
two-section
serial
number
consisting
of a four-digit
prefix and a five-digit suffix, separated
by a letter
Model 1740A
designating the country in which the instrument was
manufactured.
(A = U.S.A; G = West Germany;
J =
Japan; U = Unit Kingdom.)
1-16.
This manual applies to instruments with a serial
prefix number as shown on the title page. If changes
have been made in the instrument since this manual
was printed, a "Manual Changes" supplement supplied
with the manual will define these changes. Be sure to
record
these
changes
in your
manual.
Backdating
information in Section VII adapts the manual to in-
struments with serial numbers lower than that shown
on the title page. Part numbers for the manual and the
microfiche copy of the manual are also shown on the
title page.
Table 1-1. Specifications
VERTICAL
DISPLAY
MODES
Channel A; channel B; channels A and B displayed
alternately on successive sweeps (ALT); channels A
and B displayed by switching between channels at
an approximate 250 kHz rate with blanking during
switching (CHOP); channel A plus channel B (alge-
braic addition); and trigger view.
VERTICAL
AMPLIFIERS
(2)
Bandwidth and Rise Time at all deflection factors
from 0°C to +55°C.
BANDWIDTH: 3 dB down from 6 div reference signal.
DC-Coupled: dc to 100 MHz in both 500 and 1 MQ in-
put modes.
AC-Coupled: approx 10 Hz to 100 MHz; 1 Hz with 10:1
divider probes.
BANDWIDTH LIMIT: limits upper bandwidth to approx
20 MHz.
RISE TIME: <3.5 ns, measured from 10% to 90% points
of a 6 div input step.
DEFLECTION
FACTOR
Ranges: 5 mV/div to 20 V/div (12 calibrated positions)
in 1, 2, 5 sequence, accurate within 3%.
Vernier:
continuously
variable
between
all ranges,
extends maximum
deflection factor to at least 50
V/div. UNCAL light indicates when vernier is not
in the CAL position.
POLARITY:
channel B may be inverted, front panel
pushbutton.
DELAY LINE: input signals are delayed sufficiently to
view leading edge of input pulse without advanced
trigger.
INPUT COUPLING: selectable AC or DC, 500 (dc), or
ground. Ground position disconnects input connector
and grounds amplifier input.
INPUT RC (selectable)
AC or OC: 1 MQ +2% shunted by approx 20 pF.
50 Ohm:
500
+3%; SWR
<1.4 at 100 MHz
on all
ranges.
MAXIMUM
INPUT
AC or DC: 250 V (dc + peak ac) or 500 V p-p at 1 kHz or
less.
50 Ohm: 5 V rms.
A+B OPERATION
Amplifier: bandwidth
and deflection factors are un-
1-2
changed; channel B may be inverted for A—B oper-
ation.
Differential (A—B) Common
Mode: CMRR is at least
20 dB from de to 20 MHz. Common
mode signal
amplitude equivalent to 8 divisions with one vernier
adjusted for optimum rejection.
VERTICAL
MAGNIFICATION
(X5)
BANDWIDTH: 3 dB down from 8 div reference signal.
DC-Coupled: dc to approx 40 MHz.
AC-Coupled: approx 10 Hz to 40 MHz.
RISE TIME: <9 ns (measured from 10% to 90% points of
8 div input step).
DEFLECTION
FACTOR: increases sensitivity of each
deflection factor setting by a factor of 5 with a maxi-
mum sensitivity of 1 mV on channels A and B.
TRIGGER
SOURCE
Selectable from channel A, channel B, composite, or
line frequency.
CHANNEL A: all display modes triggered by channel A
signal.
CHANNEL B: all display modes triggered by channel B
signal.
COMPOSITE: all display modes triggered by displayed
signal except in Chop. In Chop mode, trigger signal is
derived from channel A.
LINE
FREQUENCY:
trigger signal is derived from
power line frequency.
TRIGGER
VIEW
Display
internal
or
external
trigger
signal
in
Alternate or Chop mode, channel] A, channel B, and
the trigger signals are displayed. In channel A or
B mode, Trigger View overrides that channel. Inter-
nal trigger signal amplitude approximates vertical
signal amplitude. Ext trigger signal deflection factor
is approx
100 mV/div
or 1 V/div
in EXT
-10.
Triggering
point is approx
center
screen.
With
identically timed signals to a vertical input and
the Ext trigger input, trigger signal delay is 2.5 ns
+l ns.
HORIZONTAL
DISPLAY
MODES
Main, main intensified, mixed, delayed, mag X10,
and A vs. B.
m
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