Model 166D, MX-2962/USM-l05A Section I
Paragraphs 1-1 to 1-3
SECTION I
GENERAL INFORMATION
1-1. FUNCTIONAL DESCRIPTION. tube and semiconductor types which are MIL approved.
Where these types differ from the commercial types
The Model 166D Delay Generator is a plug-in unit used in the Model 166D, both types are listed and
which provides the ($3 Models 160B and 170A Oscillo- identified with the correct model in the table of re-
scopes with delayed sweep capability. Two modes of placeable parts. All other references to the Model
delay are provided, one in which the oscilloscope 166D apply equally well to the Model H02 166D. Tables
sweep starts at the end of the delay period, and one 1-1 through 1-4 list reference data for the Model 166D.
in which the oscilloscope sweep is armed at the end
of the delay period but does not start until triggered
independently. 1-2. ELECTRON TUBE TYPES 6922/6DJ8.
The Model 166D itself generates a linear sweep(the Electron tube types 6922 and 6DJ8 are equivalent,
delaying sweep). The delaying sweep can be used to and either type can be used where called for in the
measure delay, indicate the starting point of the de- instrument. However, the two types draw different
layed sweep of the oscilloscope, and provide mixed heater current. Since the heater circuit is balanced
sweeps in which the delaying sweep drives the trace to ground, use only one tvpe or the other.
for approximately the delay period and the oscillo-
scope sweep drives the trace for the duration of
the display. 1-3. CHANGES.
The Model 166D is designed with specification The Model 166D carries a five-digit serial number
MIL-E-16400C as a guide. The instrument meets the with a three-digit prefix: 000-00000. The three digit
environmental specifications of oscilloscope models prefix appears on the title page of this manual to
1608 and 170A when installed in an oscilloscope. indicate to which instruments this manual applies
directly. A supplement or change sheet may be in-
Model H02 166D Delay Generator is identical to cluded with this manual to indicate the manual changes
Model 166D in specifications, operation, and applica- required to make the manual apply directly to instru-
tion. However. the Model H02 166D uses electron ments which carry a different serial prefix.
Table 1-1. Specifications *
Delay Time: Triggering:
1 psec to 10 seconds Internal. power line or vertical input signal.
(2 mm or more vertical deflection. External,
Delaying Sweep:
1/2 volt peak-to-peak or more.)
18 calibrated ranges from 2 psec/cm to 1 second/
cm in 1. 2, 5, and 10 sequence.
Triggering Point:
Positive or negative going voltage. Trigger level
Delayed Length:
of externalsync signaladjustable-30to+30volts.
0 to 10 cm
When delaying sweep functions in place of main Sweep Selector:
sweep, setting in cm controls mcurrence of main (a) Main Sweep
! il sweep. When delayed main sweepis used, setting
(b) Delaying Sweep. Brightened segment of trace
I acts as multiplier on Delaying Sweep setting to indicates time relationship between delaying
I determine total delay time.
sweep display and main sweep display.
I
Accuracy: (c) Main Sweep Delayed
I f 1% 2 psec to 0.1 second ranges; *3% 0.2, 0.5,
(d) Mixed Sweep
1 second ranges
*0.2% linearity, all but 2, 5, and lOpsec ranges; Delayed Trigger Output:
*OS% linearity, 2, 5, 10 psec ranges. Approximately 20 volts positive
Jitter: Less than 0.01 psec or *0.005% of total Power:
delay. Supplied by 160B or 170A
Delay Functions: Weight:
(a) Trigger main sweep. (b) Arm main sweep. Net 4-1/2 lbs, shipping 7 lbs
* with @ Models 160B or 170A Oscilloscopes
)1227-1 1- 1
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ACEC
