122A Sect. I1 Page 1
SECTION II
OPERATING INSTRUCTIONS
ONTROLS AND TERMINALS C. Other Types of Input
2-1 briefly shows how to operate the in- Other types of input are possible. For example,
nt. Additional detailed information is given balanced input with either dual or single channel
operation is possible (see Figure 2-4). However,
as with most other types of input, the limitation
that it may only be used on the .01 VOLTS/CM
ranges must be observed. Thus the common-
VERTICAL AMPLIFIER INPUT
signal limit is *3 volts. This limitation is necessary
:ONSIDERATIONS
since there is an attenuator only between the upper
exceed the common-signal voltage limit red input terminal and the input grid. The lower
my conditions. This limit is *3 volts on the red terminal does not have an attenuator between
rid. Note that this is the sum of all volt- - it and its input grid.? Therefore balanced input
c plus peak ac). with attenuation is not possible using only a single
channel without external attenuators. However, this
he attenuators are used the voltage to the may be accomplished using both channels (see
brminals may be increased by the amount of paragraph B above and Figure 2-3).
the attenuation as follows:
P
TABLE 2-1
Attenuator Setting Common-Signal Limi 2-3 CHECKING HORIZONTAL AMPLIFIER
GAIN CALIBRATION
0.01 VOLTS/CM *3 volts
0.1 30 The horizontal amplifier may be calibrated by com-
1 .o 300 paring it with the vertical amplifier. First, cali-
10 500 brate the vertical amplifier as shown in Figure 2-10.
Set both VERT. and HORIZ. SENSITIVITY switches
NOTE Maximum peak input voltage limit is 600 to 0.1 VOLTS/CM with VERNIER?S in Cal. Feed
volts (dc plus peak ac). The following are rec- an external 1 volt signal into the verticaland hori-
ommended ways of connecting the oscilloscope. Re- zontal input terminals. Adjust the input amplitude
fer to Figures 2-1 to 2-4 for further details con- for a 10 cm high pattern. Set Horiz. Gain Adj.,
cerning connections. R114, for exactly 10 cm of horizontal deflection.
A. Unbalanced Input (see Figure 2-2)
Maximum voltage limit as in table 2-1.
2-4 OPERATING DRAWINGS
B. Differential (B-A) Input (see Figure 2-3)
Basic operating procedures are shown in the illus-
Maximum voltage limit from each line to ground trations that follow. Directions are given for the
as in table 2-1. Common-signal rejection is at cabinet model but are the same for the rack mount
least 40 db with both switches set on 10 MILLI- model. The location of the controls on the front
VOLTS/CM. Rejection is at least 30 db on other panel is different in the rack mount model but the
ranges, functions of the controls are the same. |