TB 9-6625-2049-35
12
(15) Set frequency counter controls to measure frequency. If frequency counter does
not indicate between 59.99970 and 60.00030 MHz, perform
b
below.
b. Adjustments
(1) Disconnect TI rear panel
10 MHz OVEN OUTPUT
from
EXT REF IN
option
001 only.
(2) Connect frequency counter
CHANNEL A
to TI rear panel
AUX 21-60 MHz
.
(3) Press keys and enter values using
DATA
keys as listed in (a) through (c) below:
(a)
FUNCTION
sine wave.
(b)
ENTRY FREQ
.
(c)
60 MHz
.
(4) Adjust REF
R30 (fig. 3) until frequency counter indicates 60.000000 MHz (R).
Figure 3. Test instrument - bottom view.
(5) Disconnect frequency counter from TI rear panel
AUX 21-60 MHz
.
(6) Connect frequency counter
CHANNEL A
to TI
SIGNAL
.
(7) Enter
20 MHz
using
DATA
keys. Frequency counter will indicate between
19.99990 and 20.00010 MHz.
(8) Disconnect frequency counter from TI.
(9) Perform (10) through (14) below for option 001 only.
(10) Connect time/frequency workstation
OUTPUT 1 MHz
to frequency difference
meter
REF INPUT
.
(11) Connect TI rear panel
10 MHz OVEN OUTPUT
to frequency difference meter
SIG INPUT
.
