TB 9-6625-2005-35
m. Position controls as listed in (1) through (10)
below: (1) SWP CAL and HORIZ POSITION controls
adjusted until second and tenth vertical signals are
alined with second and tenth vertical graticule lines
(counted from left edge).
(2) FREQUENCY SPAN/DIV control to 2
kHz.(3) TIME/DIV control to 0.2 s.
(4) DIGITAL STORAGE DISPLAY Aand B
pushbuttons on.
(5) VERT POSITION control adjusted to
place display baseline on bottom horizontal graticule
line. (6) RESOLUTION (Hz) control to 3K.
(7) DOT FREQUENCY CONTROL to 500.00
kHz. (8) LOG CAL control for a fullscreen display.
(9) REFERENCE LEVEL LOG 2dB/DIV
pushbutton on.
(10) AMPL CAL control for a full screen
display.
8. Readout Verification (L3 Plug-in Only)
a. Performance Check
(1) Position controls as listed in (a) through
(c) below: (a)INPUT REF switch to dBm/50ΩΩ .
(b)INPUT TERMNZswitch to 50ΩΩ.
(c)REFERENCE LEVEL control for
+21 dBm.(2) Position INPUT REF switch to dBV and
observe art readout for a +8 dBV indication displayed.
(3) Position INPUT REF switch to dBm/600ΩΩ
and observe crt readout for a +10 dBm indication
displayed.
NOTE
The INPUT connector is a three-
conductor BNC connector with the
outer ring used to detect the
presence of a 10X probe.
(4) Short INPUT outer ring using adapter and
lead (B4 and B12) and observe crt readout for a 20 dB
increase.
b. Adjustments. No adjustments can be made.
9. Calibrator Frequency and Amplitude
a. Performance Check
(1) Connect equipment as shown in figure 1.
(2) Observe frequency counter (A6)
indication. If frequency counter does not indicate
between 499.999 to 500.001 kHz, perform b(1) and (2)
below. (3) Observe digital voltmeter (A5)
indication. If digital voltmeter does not indicate between
.3579 to .3746 V dc, perform b(1) and (3) through (19)
below.
b. Adjustments
(1) Remove TI from oscilloscope and
reconnect to oscilloscope using two extenders (B8).
(2) Adjust Y390 (fig. 2) for a frequency
counter indication of 500.000 kHz.
(3) Remove plug-in module from TI and place
insulating tape (e.g., scotch tape) over pins A13, B13,
A14, B14, A15, and B15 of interface connection (fig. 3).
(4) Reinsert plug-in module in T1.
(5) Connect test oscillator (A9) output (without
the termination) to ac voltmeter (A1), using cable (B7).
(6) Adjust test oscillator controls for an output
frequency of 500 kHz and 10 mV indication on ac
voltmeter.
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