TM 11-6625-2781-14&P-2
Section VIII
analyzer is operated in the PER DIVISION or ZERO
9 SECOND CONVERTER ASSEMBLY
mode the marker generator is disabled.
The second converter assembly consists of a 150 MHz
11 SCAN WIDTH ATTENUATOR ASSEMBLY
crystal controlled oscillator and a double balanced
mixer. The input from the 200 MHz IF amplifier is
This portion of the scan width attenuator assembly
down-converted to 50 MHz and applied to the 50 MHz
contains the resistive network and switching to attenuate
amplifier in the IF Section.
for the .02 kHz to 10 MHz per division modes.
10 PRESET SCAN ASSEMBLY
12 BANDWIDTH SWITCH ASSEMBLY
The Preset Scan Assembly applies a preset scan
voltage to the A5 shaping amplifier in the 0-100 MHz
This switch controls the LC and crystal bandpass circuits
scan. The Preset scan voltage also generates an
in the IF section. In the 0-100 MHz mode the 300 kHz
inverted marker which is supplied to the display section.
bandwidth is automatically selected.
This inverted marker is analogous to the center
frequency to which the analyzer is tuned. When the
