AT&T Bell System 1097A Description And Use page 2

SECTION 634-020-505
14 7C AMPLIFIER
1097A FILTER
513A PROBE
Fig. 2-1097 A Filter Attached to 147C Amplifier
the tone level is set at the time the tone source
is connected. The 147C amplifier gain is then
readjusted slightly from the above setting to obtain
the proper tone level at the headset. Set tone
level high for electrically noisy environments and
low for quiet areas.
Page 2
2 Pages
2.05
With the 147C amplifier and tone source
adjusted, fault location and pair identification
operations may proceed.