TB 9-6625-003-35
NOTE
Steps (4) and (5) below pertain to models 415B and 415BR
only. Steps (6) and (7) pertains to model 351 only.
(4) Set BOLO BIAS CURRENT switch to HIGH and INPUT SELECTOR switch to
BOLO 200Ω. Dc voltmeter will indicate between 1.60 and 1.76 V dc.
(5) Set BOLO BIAS CURRENT switch to LOW. Dc voltmeter will indicate between
0.80 and 0.92 V dc.
(6) Set INPUT SELECTOR switch to BOLO MA 4.5 and METER SCALE switch to
BOLO CURR. If TI meter does not indicate on 4.5 MA on bottom scale, and if dc voltmeter
does not indicate between 0.83 and 0.97 V dc, perform b below.
(7) Set INPUT SELECTOR switch to BOLO MA 8.75. TI will indicate 8.5 MA on
bottom scale and dc voltmeter will indicate between 1.62 and 1.88 V dc.
bottom scale (R).
Figure 5. Test instrument-left side view.
18. Frequency and Bandwidth
a. Performance Check
(1) Set INPUT SELECTOR switch to XTAL 200 KΩ and VERNIER and GAIN
controls to mid-range.
(2) Connect equipment as shown in figure 2.
14