Tektronix 475 - Page 226

475 Service
Page 1 of 6
Calibration Procedure
Corrections for all Serial Numbers, and changes
for SN B030000 and up
Page 5-2
CHANGE:
Table 5-1
Tolerance of item 3 (DC VOLTMETER) to read: "calibrated
to 1% accuracy at -2450 Volts."
Description and Example of item 8 to read: "With charge
lin e, example Tektronix Type 113 Delay Line."
Item 18; quantity of two are required.
Page 5-4
CHANGE:
Preliminary Control Settings
Under "Triggering Controls (both A and B i f applicable)"
B SOURCE setting should read: STARTS AFTER DELAY
Page 5-7
ADD:
Step 6a
pull 20 MHz (20 or 100 MHz for SN BlOOOOO-up) BW switch
fu lly out and set A and B TIME/DIV switches to 10ys.
Page 5-8
ADD:
Step 12a & 12b
at the end of 12a; push 20 MHz (20 or 100 MHz for later
SN) BW switch fully in (FULL BW). Set VERT MODE switch
to CH-1.
For step 12b, two X10 BNC attenuators in series may be
required.
Page 5-14
Step la
CHANGE to read:
la. CHECK-+50 V supply, ±0.5%. ADJUST R1430 ONLY i f supply
Page 5-15
is outside of this tolerance, (see accompanying note to
follow step lc on page 5-25)
Step 15
CHANGE to read:
15a. Both VOLTS/DIV to 2 mV,
C2/573