HP 1740A - Page 8

General Information
OPTION
102.
Option
102
is
Option
101
with
an
addi-
tional
special
adapter
plate
(HP
Part
No.
5061-1213).
The
special
adpater
plate
is
used
to
attach
the
1740A
and
1607A
instruments
together
as
a
single
unit.
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.
me